/mandos/release : revision 237.7.195

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

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#

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# Everything else is

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#

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

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

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# along with this program. If not, see

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

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#

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

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

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#

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from __future__ import (division, absolute_import, print_function,

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unicode_literals)

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from future_builtins import *

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import SocketServer as socketserver

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import socket

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import optparse

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import argparse

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import datetime

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import errno

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import gnutls.crypto

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import 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 = "1.2.3"

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#logger = logging.getLogger('mandos')

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logger = logging.Logger('mandos')

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version = "1.6.2"

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stored_state_file = "clients.pickle"

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logger = logging.getLogger()

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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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try:

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if_nametoindex = (ctypes.cdll.LoadLibrary

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

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.if_nametoindex)

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except (OSError, AttributeError):

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def if_nametoindex(interface):

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

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

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

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ifreq = fcntl.ioctl(s, SIOCGIFINDEX,

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

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interface))

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

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ifreq[16:20])[0]

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return interface_index

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

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"""init logger and add loglevel"""

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syslogger.setFormatter(logging.Formatter

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

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' %(message)s'))

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logger.addHandler(syslogger)

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if debug:

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console = logging.StreamHandler()

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

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' [%(process)d]:'

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' %(levelname)s:'

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' %(message)s'))

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logger.addHandler(console)

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logger.setLevel(level)

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class PGPError(Exception):

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

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pass

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class PGPEngine(object):

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

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def __init__(self):

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

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self.gnupgargs = ['--batch',

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'--home', self.tempdir,

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'--force-mdc',

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'--quiet',

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'--no-use-agent']

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def __enter__(self):

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return self

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

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self._cleanup()

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return False

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def __del__(self):

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self._cleanup()

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def _cleanup(self):

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if self.tempdir is not None:

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# Delete contents of tempdir

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

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topdown = False):

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for filename in files:

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

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for dirname in dirs:

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

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# Remove tempdir

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os.rmdir(self.tempdir)

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self.tempdir = None

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def password_encode(self, password):

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

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

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

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if len(encoded) > 2048:

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

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

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

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

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return encoded

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def encrypt(self, data, password):

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passphrase = self.password_encode(password)

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with tempfile.NamedTemporaryFile(dir=self.tempdir

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) as passfile:

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passfile.write(passphrase)

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passfile.flush()

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

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'--passphrase-file',

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passfile.name]

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+ self.gnupgargs,

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stdin = subprocess.PIPE,

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stdout = subprocess.PIPE,

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stderr = subprocess.PIPE)

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

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if proc.returncode != 0:

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raise PGPError(err)

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return ciphertext

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def decrypt(self, data, password):

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passphrase = self.password_encode(password)

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with tempfile.NamedTemporaryFile(dir = self.tempdir

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) as passfile:

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passfile.write(passphrase)

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passfile.flush()

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

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'--passphrase-file',

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passfile.name]

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+ self.gnupgargs,

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stdin = subprocess.PIPE,

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stdout = subprocess.PIPE,

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stderr = subprocess.PIPE)

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decrypted_plaintext, err = proc.communicate(input

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= data)

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if proc.returncode != 0:

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raise PGPError(err)

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return decrypted_plaintext

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

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

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port: integer; what port to announce

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TXT: list of strings; TXT record for the service

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

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server: D-Bus Server

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bus: dbus.SystemBus()

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"""

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

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

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

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self.group = None # our entry group

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self.server = None

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self.bus = bus

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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.GetAlternativeServiceName(self.name))

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self.name = unicode(self.server

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.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, error:

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

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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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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.group.connect_to_signal('StateChanged',

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self

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.entry_group_state_changed)

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self.entry_group_state_changed_match = (

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self.group.connect_to_signal(

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'StateChanged', self.entry_group_state_changed))

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

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self.name, self.type)

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self.group.AddService(

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dbus.UInt16(self.port),

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avahi.string_array_to_txt_array(self.TXT))

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self.group.Commit()

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def entry_group_state_changed(self, state, error):

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

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

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elif state == avahi.ENTRY_GROUP_FAILURE:

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

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unicode(error))

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raise AvahiGroupError("State changed: %s"

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% unicode(error))

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

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.format(error))

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def cleanup(self):

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

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if self.group is not None:

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self.group.Free()

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try:

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self.group.Free()

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except (dbus.exceptions.UnknownMethodException,

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dbus.exceptions.DBusException):

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pass

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self.group = None

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def server_state_changed(self, state):

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self.remove()

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

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

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

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if state == avahi.SERVER_COLLISION:

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logger.error("Zeroconf server name collision")

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self.remove()

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bad_states = { avahi.SERVER_INVALID:

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"Zeroconf server invalid",

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avahi.SERVER_REGISTERING: None,

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avahi.SERVER_COLLISION:

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"Zeroconf server name collision",

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avahi.SERVER_FAILURE:

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"Zeroconf server failure" }

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if state in bad_states:

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if bad_states[state] is not None:

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if error is None:

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logger.error(bad_states[state])

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else:

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

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self.cleanup()

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elif state == avahi.SERVER_RUNNING:

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self.add()

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else:

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if error is None:

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

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else:

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

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def activate(self):

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

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if self.server is None:

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self.server = dbus.Interface(

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self.bus.get_object(avahi.DBUS_NAME,

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avahi.DBUS_PATH_SERVER),

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avahi.DBUS_PATH_SERVER,

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follow_name_owner_changes=True),

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avahi.DBUS_INTERFACE_SERVER)

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self.server.connect_to_signal("StateChanged",

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self.server_state_changed)

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

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class AvahiServiceToSyslog(AvahiService):

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def rename(self):

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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_enabled: datetime.datetime(); (UTC)

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last_checker_status: integer between 0 and 255 reflecting exit

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status of last checker. -1 reflects crashed

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checker, -2 means no checker completed yet.

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

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

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D-Bus identifiers

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

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

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until this client is disabled

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extended_timeout: extra long timeout when secret has been sent

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runtime_expansions: Allowed attributes for runtime expansion.

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

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disabled, or None

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server_settings: The server_settings dict from main()

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"""

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runtime_expansions = ("approval_delay", "approval_duration",

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

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

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

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

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"last_approval_request", "last_checked_ok",

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

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@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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client_defaults = { "timeout": "PT5M",

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"extended_timeout": "PT15M",

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"interval": "PT2M",

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

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"host": "",

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"approval_delay": "PT0S",

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"approval_duration": "PT1S",

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"approved_by_default": "True",

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"enabled": "True",

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}

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def timeout_milliseconds(self):

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"Return the 'timeout' attribute in milliseconds"

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return self._timedelta_to_milliseconds(self.timeout)

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return timedelta_to_milliseconds(self.timeout)

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def extended_timeout_milliseconds(self):

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"Return the 'extended_timeout' attribute in milliseconds"

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return timedelta_to_milliseconds(self.extended_timeout)

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def interval_milliseconds(self):

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"Return the 'interval' attribute in milliseconds"

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return self._timedelta_to_milliseconds(self.interval)

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return timedelta_to_milliseconds(self.interval)

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def approval_delay_milliseconds(self):

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return self._timedelta_to_milliseconds(self.approval_delay)

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

300

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

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

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attribute."""

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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, ...}, ...}

487

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.

490

"""

491

settings = {}

492

for client_name in config.sections():

493

section = dict(config.items(client_name))

494

client = settings[client_name] = {}

495

496

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

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# Reformat values from string types to Python types

498

client["approved_by_default"] = config.getboolean(

499

client_name, "approved_by_default")

500

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

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"enabled")

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

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.replace(" ", ""))

505

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

509

(section["secfile"])),

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"rb") as secfile:

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

512

else:

513

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

514

.format(section))

515

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

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client["extended_timeout"] = string_to_delta(

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section["extended_timeout"])

518

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"])

523

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

524

client["last_approval_request"] = None

525

client["last_checked_ok"] = None

526

client["last_checker_status"] = -2

527

528

return settings

529

530

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

303

531

self.name = name

304

if config is None:

305

config = {}

532

if server_settings is None:

533

server_settings = {}

534

self.server_settings = server_settings

535

# adding all client settings

536

for setting, value in settings.iteritems():

537

setattr(self, setting, value)

538

539

if self.enabled:

540

if not hasattr(self, "last_enabled"):

541

self.last_enabled = datetime.datetime.utcnow()

542

if not hasattr(self, "expires"):

543

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

544

+ self.timeout)

545

else:

546

self.last_enabled = None

547

self.expires = None

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549

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

307

550

# Uppercase and remove spaces from fingerprint for later

308

551

# comparison purposes with return value from the fingerprint()

309

552

# function

310

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

311

.replace(" ", ""))

312

553

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

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"

322

% self.name)

323

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

324

self.created = datetime.datetime.utcnow()

325

self.enabled = False

326

self.last_approval_request = None

327

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

554

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

555

datetime.datetime.utcnow())

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# attributes specific for this server instance

332

558

self.checker = None

333

559

self.checker_initiator_tag = None

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560

self.disable_initiator_tag = None

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561

self.checker_callback_tag = None

336

self.checker_command = config["checker"]

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self.current_checker_command = None

338

self.last_connect = None

339

self._approved = None

340

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

341

True)

563

self.approved = None

342

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self.approvals_pending = 0

343

self.approval_delay = string_to_delta(

344

config["approval_delay"])

345

self.approval_duration = string_to_delta(

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config["approval_duration"])

347

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

565

self.changedstate = (multiprocessing_manager

566

.Condition(multiprocessing_manager

567

.Lock()))

568

self.client_structure = [attr for attr in

569

self.__dict__.iterkeys()

570

if not attr.startswith("_")]

571

self.client_structure.append("client_structure")

572

573

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

574

lambda obj:

575

isinstance(obj,

576

property)):

577

if not name.startswith("_"):

578

self.client_structure.append(name)

348

579

580

# Send notice to process children that client state has changed

349

581

def send_changedstate(self):

350

self.changedstate.acquire()

351

self.changedstate.notify_all()

352

self.changedstate.release()

353

582

with self.changedstate:

583

self.changedstate.notify_all()

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354

585

def enable(self):

355

586

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

356

587

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

357

588

# Already enabled

358

589

return

359

self.send_changedstate()

590

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

591

self.enabled = True

360

592

self.last_enabled = datetime.datetime.utcnow()

593

self.init_checker()

594

self.send_changedstate()

595

596

def disable(self, quiet=True):

597

"""Disable this client."""

598

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

599

return False

600

if not quiet:

601

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

602

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

603

gobject.source_remove(self.disable_initiator_tag)

604

self.disable_initiator_tag = None

605

self.expires = None

606

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

607

gobject.source_remove(self.checker_initiator_tag)

608

self.checker_initiator_tag = None

609

self.stop_checker()

610

self.enabled = False

611

if not quiet:

612

self.send_changedstate()

613

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

614

return False

615

616

def __del__(self):

617

self.disable()

618

619

def init_checker(self):

361

620

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

362

621

# and every interval from then on.

622

if self.checker_initiator_tag is not None:

623

gobject.source_remove(self.checker_initiator_tag)

363

624

self.checker_initiator_tag = (gobject.timeout_add

364

625

(self.interval_milliseconds(),

365

626

self.start_checker))

366

627

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

628

if self.disable_initiator_tag is not None:

629

gobject.source_remove(self.disable_initiator_tag)

367

630

self.disable_initiator_tag = (gobject.timeout_add

368

631

(self.timeout_milliseconds(),

369

632

self.disable))

370

self.enabled = True

371

633

# Also start a new checker *right now*.

372

634

self.start_checker()

373

635

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

399

636

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

400

637

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

401

638

self.checker_callback_tag = None

402

639

self.checker = None

403

640

if os.WIFEXITED(condition):

404

exitstatus = os.WEXITSTATUS(condition)

405

if exitstatus == 0:

641

self.last_checker_status = os.WEXITSTATUS(condition)

642

if self.last_checker_status == 0:

406

643

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

407

644

vars(self))

408

645

self.checked_ok()

410

647

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

411

648

vars(self))

412

649

else:

650

self.last_checker_status = -1

413

651

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

414

652

vars(self))

415

653

416

654

def checked_ok(self):

417

"""Bump up the timeout for this client.

418

419

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

420

alive and well.

421

"""

655

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

422

656

self.last_checked_ok = datetime.datetime.utcnow()

423

gobject.source_remove(self.disable_initiator_tag)

424

self.disable_initiator_tag = (gobject.timeout_add

425

(self.timeout_milliseconds(),

426

self.disable))

657

self.last_checker_status = 0

658

self.bump_timeout()

659

660

def bump_timeout(self, timeout=None):

661

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

662

if timeout is None:

663

timeout = self.timeout

664

if self.disable_initiator_tag is not None:

665

gobject.source_remove(self.disable_initiator_tag)

666

self.disable_initiator_tag = None

667

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

668

self.disable_initiator_tag = (gobject.timeout_add

669

(timedelta_to_milliseconds

670

(timeout), self.disable))

671

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

427

672

428

673

def need_approval(self):

429

674

self.last_approval_request = datetime.datetime.utcnow()

434

679

If a checker already exists, leave it running and do

435

680

nothing."""

436

681

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

437

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

438

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

439

# client would inevitably timeout, since no checker would get

440

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

682

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

683

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

684

# would inevitably timeout, since no checker would get a

685

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

441

686

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

442

687

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

443

688

# should be.

445

690

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

446

691

try:

447

692

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

448

except (AttributeError, OSError), error:

449

if (isinstance(error, OSError)

450

and error.errno != errno.ECHILD):

451

raise error

693

except AttributeError:

694

pass

695

except OSError as error:

696

if error.errno != errno.ECHILD:

697

raise

452

698

else:

453

699

if pid:

454

700

logger.warning("Checker was a zombie")

457

703

self.current_checker_command)

458

704

# Start a new checker if needed

459

705

if self.checker is None:

706

# Escape attributes for the shell

707

escaped_attrs = dict(

708

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

709

for attr in

710

self.runtime_expansions)

460

711

try:

461

# In case checker_command has exactly one % operator

462

command = self.checker_command % self.host

463

except TypeError:

464

# Escape attributes for the shell

465

escaped_attrs = dict(

466

(attr,

467

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

468

errors=

469

'replace')))

470

for attr in

471

self.runtime_expansions)

472

473

try:

474

command = self.checker_command % escaped_attrs

475

except TypeError, error:

476

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

477

' %s', self.checker_command, error)

478

return True # Try again later

712

command = self.checker_command % escaped_attrs

713

except TypeError as error:

714

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

715

self.checker_command, exc_info=error)

716

return True # Try again later

479

717

self.current_checker_command = command

480

718

try:

481

719

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

484

722

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

485

723

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

486

724

# always replaced by /dev/null.)

725

# The exception is when not debugging but nevertheless

726

# running in the foreground; use the previously

727

# created wnull.

728

popen_args = {}

729

if (not self.server_settings["debug"]

730

and self.server_settings["foreground"]):

731

popen_args.update({"stdout": wnull,

732

"stderr": wnull })

487

733

self.checker = subprocess.Popen(command,

488

734

close_fds=True,

489

shell=True, cwd="/")

490

self.checker_callback_tag = (gobject.child_watch_add

491

(self.checker.pid,

492

self.checker_callback,

493

data=command))

494

# The checker may have completed before the gobject

495

# watch was added. Check for this.

735

shell=True, cwd="/",

736

**popen_args)

737

except OSError as error:

738

logger.error("Failed to start subprocess",

739

exc_info=error)

740

return True

741

self.checker_callback_tag = (gobject.child_watch_add

742

(self.checker.pid,

743

self.checker_callback,

744

data=command))

745

# The checker may have completed before the gobject

746

# watch was added. Check for this.

747

try:

496

748

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

497

if pid:

498

gobject.source_remove(self.checker_callback_tag)

499

self.checker_callback(pid, status, command)

500

except OSError, error:

501

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

502

error)

749

except OSError as error:

750

if error.errno == errno.ECHILD:

751

# This should never happen

752

logger.error("Child process vanished",

753

exc_info=error)

754

return True

755

raise

756

if pid:

757

gobject.source_remove(self.checker_callback_tag)

758

self.checker_callback(pid, status, command)

503

759

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

504

760

return True

505

761

512

768

return

513

769

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

514

770

try:

515

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

771

self.checker.terminate()

516

772

#time.sleep(0.5)

517

773

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

518

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

519

except OSError, error:

774

# self.checker.kill()

775

except OSError as error:

520

776

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

521

777

raise

522

778

self.checker = None

523

779

780

524

781

def dbus_service_property(dbus_interface, signature="v",

525

782

access="readwrite", byte_arrays=False):

526

783

"""Decorators for marking methods of a DBusObjectWithProperties to

537

794

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

538

795

if byte_arrays and signature != "ay":

539

796

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

540

" signature %r" % signature)

797

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

541

798

def decorator(func):

542

799

func._dbus_is_property = True

543

800

func._dbus_interface = dbus_interface

551

808

return decorator

552

809

553

810

811

def dbus_interface_annotations(dbus_interface):

812

"""Decorator for marking functions returning interface annotations

813

814

Usage:

815

816

@dbus_interface_annotations("org.example.Interface")

817

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

818

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

819

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

820

"false"}

821

"""

822

def decorator(func):

823

func._dbus_is_interface = True

824

func._dbus_interface = dbus_interface

825

func._dbus_name = dbus_interface

826

return func

827

return decorator

828

829

830

def dbus_annotations(annotations):

831

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

832

Usage:

833

834

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

835

access="r")

836

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

837

"org.freedesktop.DBus.Property."

838

"EmitsChangedSignal": "false"})

839

def Property_dbus_property(self):

840

return dbus.Boolean(False)

841

"""

842

def decorator(func):

843

func._dbus_annotations = annotations

844

return func

845

return decorator

846

847

554

848

class DBusPropertyException(dbus.exceptions.DBusException):

555

849

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

556

850

"""

572

866

573

867

class DBusObjectWithProperties(dbus.service.Object):

574

868

"""A D-Bus object with properties.

575

869

576

870

Classes inheriting from this can use the dbus_service_property

577

871

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

578

872

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

579

873

"""

580

874

581

875

@staticmethod

582

def _is_dbus_property(obj):

583

return getattr(obj, "_dbus_is_property", False)

876

def _is_dbus_thing(thing):

877

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

878

879

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

880

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

881

"""

882

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

883

False)

584

884

585

def _get_all_dbus_properties(self):

885

def _get_all_dbus_things(self, thing):

586

886

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

587

887

"""

588

return ((prop._dbus_name, prop)

589

for name, prop in

590

inspect.getmembers(self, self._is_dbus_property))

888

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

889

name),

890

athing.__get__(self))

891

for cls in self.__class__.__mro__

892

for name, athing in

893

inspect.getmembers(cls,

894

self._is_dbus_thing(thing)))

591

895

592

896

def _get_dbus_property(self, interface_name, property_name):

593

897

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

594

898

property with the specified name and interface.

595

899

"""

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

900

for cls in self.__class__.__mro__:

901

for name, value in (inspect.getmembers

902

(cls,

903

self._is_dbus_thing("property"))):

904

if (value._dbus_name == property_name

905

and value._dbus_interface == interface_name):

906

return value.__get__(self)

907

606

908

# No such property

607

909

raise DBusPropertyNotFound(self.dbus_object_path + ":"

608

910

+ interface_name + "."

633

935

# signatures other than "ay".

634

936

if prop._dbus_signature != "ay":

635

937

raise ValueError

636

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

637

for byte in value))

938

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

939

for byte in value))

638

940

prop(value)

639

941

640

942

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

642

944

def GetAll(self, interface_name):

643

945

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

644

946

standard.

645

947

646

948

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

647

949

"""

648

all = {}

649

for name, prop in self._get_all_dbus_properties():

950

properties = {}

951

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

650

952

if (interface_name

651

953

and interface_name != prop._dbus_interface):

652

954

# Interface non-empty but did not match

656

958

continue

657

959

value = prop()

658

960

if not hasattr(value, "variant_level"):

659

all[name] = value

961

properties[name] = value

660

962

continue

661

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

662

value.variant_level+1)

663

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

963

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

964

value.variant_level+1)

965

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

664

966

665

967

@dbus.service.method(dbus.INTROSPECTABLE_IFACE,

666

968

out_signature="s",

667

969

path_keyword='object_path',

668

970

connection_keyword='connection')

669

971

def Introspect(self, object_path, connection):

670

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

972

"""Overloading of standard D-Bus method.

973

974

Inserts property tags and interface annotation tags.

671

975

"""

672

976

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

673

977

connection)

680

984

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

681

985

return e

682

986

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

987

# Add property tags

683

988

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

684

989

for name, prop

685

in self._get_all_dbus_properties()

990

in self._get_all_dbus_things("property")

686

991

if prop._dbus_interface

687

992

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

688

993

if_tag.appendChild(tag)

994

# Add annotation tags

995

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

996

for tag in if_tag.getElementsByTagName(typ):

997

annots = dict()

998

for name, prop in (self.

999

_get_all_dbus_things(typ)):

1000

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

1001

and prop._dbus_interface

1002

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

1003

annots.update(getattr

1004

(prop,

1005

"_dbus_annotations",

1006

{}))

1007

for name, value in annots.iteritems():

1008

ann_tag = document.createElement(

1009

"annotation")

1010

ann_tag.setAttribute("name", name)

1011

ann_tag.setAttribute("value", value)

1012

tag.appendChild(ann_tag)

1013

# Add interface annotation tags

1014

for annotation, value in dict(

1015

itertools.chain.from_iterable(

1016

annotations().iteritems()

1017

for name, annotations in

1018

self._get_all_dbus_things("interface")

1019

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

1020

)).iteritems():

1021

ann_tag = document.createElement("annotation")

1022

ann_tag.setAttribute("name", annotation)

1023

ann_tag.setAttribute("value", value)

1024

if_tag.appendChild(ann_tag)

689

1025

# Add the names to the return values for the

690

1026

# "org.freedesktop.DBus.Properties" methods

691

1027

if (if_tag.getAttribute("name")

704

1040

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

705

1041

document.unlink()

706

1042

except (AttributeError, xml.dom.DOMException,

707

xml.parsers.expat.ExpatError), error:

1043

xml.parsers.expat.ExpatError) as error:

708

1044

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

709

error)

1045

exc_info=error)

710

1046

return xmlstring

711

1047

712

1048

1049

def datetime_to_dbus(dt, variant_level=0):

1050

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

1051

if dt is None:

1052

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

1053

return dbus.String(dt.isoformat(),

1054

variant_level=variant_level)

1055

1056

1057

def alternate_dbus_interfaces(alt_interface_names, deprecate=True):

1058

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

1059

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

1060

interface names according to the "alt_interface_names" mapping.

1061

Usage:

1062

1063

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

1064

"net.example.AlternateInterface"})

1065

class SampleDBusObject(dbus.service.Object):

1066

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

1067

def SampleDBusMethod():

1068

pass

1069

1070

The above "SampleDBusMethod" on "SampleDBusObject" will be

1071

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

1072

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

1073

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

1074

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

1075

1076

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

1077

(from DBusObjectWithProperties) and interfaces (from the

1078

dbus_interface_annotations decorator).

1079

"""

1080

def wrapper(cls):

1081

for orig_interface_name, alt_interface_name in (

1082

alt_interface_names.iteritems()):

1083

attr = {}

1084

interface_names = set()

1085

# Go though all attributes of the class

1086

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

1087

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

1088

# with the wrong interface name

1089

if (not hasattr(attribute, "_dbus_interface")

1090

or not attribute._dbus_interface

1091

.startswith(orig_interface_name)):

1092

continue

1093

# Create an alternate D-Bus interface name based on

1094

# the current name

1095

alt_interface = (attribute._dbus_interface

1096

.replace(orig_interface_name,

1097

alt_interface_name))

1098

interface_names.add(alt_interface)

1099

# Is this a D-Bus signal?

1100

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

1101

# Extract the original non-method undecorated

1102

# function by black magic

1103

nonmethod_func = (dict(

1104

zip(attribute.func_code.co_freevars,

1105

attribute.__closure__))["func"]

1106

.cell_contents)

1107

# Create a new, but exactly alike, function

1108

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

1109

# with the alternate D-Bus interface name

1110

new_function = (dbus.service.signal

1111

(alt_interface,

1112

attribute._dbus_signature)

1113

(types.FunctionType(

1114

nonmethod_func.func_code,

1115

nonmethod_func.func_globals,

1116

nonmethod_func.func_name,

1117

nonmethod_func.func_defaults,

1118

nonmethod_func.func_closure)))

1119

# Copy annotations, if any

1120

try:

1121

new_function._dbus_annotations = (

1122

dict(attribute._dbus_annotations))

1123

except AttributeError:

1124

pass

1125

# Define a creator of a function to call both the

1126

# original and alternate functions, so both the

1127

# original and alternate signals gets sent when

1128

# the function is called

1129

def fixscope(func1, func2):

1130

"""This function is a scope container to pass

1131

func1 and func2 to the "call_both" function

1132

outside of its arguments"""

1133

def call_both(*args, **kwargs):

1134

"""This function will emit two D-Bus

1135

signals by calling func1 and func2"""

1136

func1(*args, **kwargs)

1137

func2(*args, **kwargs)

1138

return call_both

1139

# Create the "call_both" function and add it to

1140

# the class

1141

attr[attrname] = fixscope(attribute, new_function)

1142

# Is this a D-Bus method?

1143

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

1144

# Create a new, but exactly alike, function

1145

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

1146

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

1147

# to the class.

1148

attr[attrname] = (dbus.service.method

1149

(alt_interface,

1150

attribute._dbus_in_signature,

1151

attribute._dbus_out_signature)

1152

(types.FunctionType

1153

(attribute.func_code,

1154

attribute.func_globals,

1155

attribute.func_name,

1156

attribute.func_defaults,

1157

attribute.func_closure)))

1158

# Copy annotations, if any

1159

try:

1160

attr[attrname]._dbus_annotations = (

1161

dict(attribute._dbus_annotations))

1162

except AttributeError:

1163

pass

1164

# Is this a D-Bus property?

1165

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

1166

# Create a new, but exactly alike, function

1167

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

1168

# property with the alternate D-Bus interface

1169

# name. Add it to the class.

1170

attr[attrname] = (dbus_service_property

1171

(alt_interface,

1172

attribute._dbus_signature,

1173

attribute._dbus_access,

1174

attribute

1175

._dbus_get_args_options

1176

["byte_arrays"])

1177

(types.FunctionType

1178

(attribute.func_code,

1179

attribute.func_globals,

1180

attribute.func_name,

1181

attribute.func_defaults,

1182

attribute.func_closure)))

1183

# Copy annotations, if any

1184

try:

1185

attr[attrname]._dbus_annotations = (

1186

dict(attribute._dbus_annotations))

1187

except AttributeError:

1188

pass

1189

# Is this a D-Bus interface?

1190

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

1191

# Create a new, but exactly alike, function

1192

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

1193

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

1194

# to the class.

1195

attr[attrname] = (dbus_interface_annotations

1196

(alt_interface)

1197

(types.FunctionType

1198

(attribute.func_code,

1199

attribute.func_globals,

1200

attribute.func_name,

1201

attribute.func_defaults,

1202

attribute.func_closure)))

1203

if deprecate:

1204

# Deprecate all alternate interfaces

1205

iname="_AlternateDBusNames_interface_annotation{0}"

1206

for interface_name in interface_names:

1207

@dbus_interface_annotations(interface_name)

1208

def func(self):

1209

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

1210

"true" }

1211

# Find an unused name

1212

for aname in (iname.format(i)

1213

for i in itertools.count()):

1214

if aname not in attr:

1215

attr[aname] = func

1216

break

1217

if interface_names:

1218

# Replace the class with a new subclass of it with

1219

# methods, signals, etc. as created above.

1220

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

1221

(cls,), attr)

1222

return cls

1223

return wrapper

1224

1225

1226

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

1227

"se.bsnet.fukt.Mandos"})

713

1228

class ClientDBus(Client, DBusObjectWithProperties):

714

1229

"""A Client class using D-Bus

715

1230

724

1239

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

725

1240

726

1241

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

727

self._approvals_pending = 0

728

1242

self.bus = bus

729

1243

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

730

1244

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

736

1250

("/clients/" + client_object_name))

737

1251

DBusObjectWithProperties.__init__(self, self.bus,

738

1252

self.dbus_object_path)

739

740

def _get_approvals_pending(self):

741

return self._approvals_pending

742

def _set_approvals_pending(self, value):

743

old_value = self._approvals_pending

744

self._approvals_pending = value

745

bval = bool(value)

746

if (hasattr(self, "dbus_object_path")

747

and bval is not bool(old_value)):

748

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

749

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

750

dbus_bool)

751

752

approvals_pending = property(_get_approvals_pending,

753

_set_approvals_pending)

754

del _get_approvals_pending, _set_approvals_pending

755

756

@staticmethod

757

def _datetime_to_dbus(dt, variant_level=0):

758

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

759

return dbus.String(dt.isoformat(),

760

variant_level=variant_level)

761

762

def enable(self):

763

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

764

r = Client.enable(self)

765

if oldstate != self.enabled:

766

# Emit D-Bus signals

767

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

768

dbus.Boolean(True, variant_level=1))

769

self.PropertyChanged(

770

dbus.String("LastEnabled"),

771

self._datetime_to_dbus(self.last_enabled,

772

variant_level=1))

773

return r

774

775

def disable(self, quiet = False):

776

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

777

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

778

if not quiet and oldstate != self.enabled:

779

# Emit D-Bus signal

780

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

781

dbus.Boolean(False, variant_level=1))

782

return r

1253

1254

def notifychangeproperty(transform_func,

1255

dbus_name, type_func=lambda x: x,

1256

variant_level=1):

1257

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

1258

its changes to DBus.

1259

1260

transform_fun: Function that takes a value and a variant_level

1261

and transforms it to a D-Bus type.

1262

dbus_name: D-Bus name of the variable

1263

type_func: Function that transform the value before sending it

1264

to the D-Bus. Default: no transform

1265

variant_level: D-Bus variant level. Default: 1

1266

"""

1267

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

1268

def setter(self, value):

1269

if hasattr(self, "dbus_object_path"):

1270

if (not hasattr(self, attrname) or

1271

type_func(getattr(self, attrname, None))

1272

!= type_func(value)):

1273

dbus_value = transform_func(type_func(value),

1274

variant_level

1275

=variant_level)

1276

self.PropertyChanged(dbus.String(dbus_name),

1277

dbus_value)

1278

setattr(self, attrname, value)

1279

1280

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

1281

1282

expires = notifychangeproperty(datetime_to_dbus, "Expires")

1283

approvals_pending = notifychangeproperty(dbus.Boolean,

1284

"ApprovalPending",

1285

type_func = bool)

1286

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

1287

last_enabled = notifychangeproperty(datetime_to_dbus,

1288

"LastEnabled")

1289

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

1290

type_func = lambda checker:

1291

checker is not None)

1292

last_checked_ok = notifychangeproperty(datetime_to_dbus,

1293

"LastCheckedOK")

1294

last_checker_status = notifychangeproperty(dbus.Int16,

1295

"LastCheckerStatus")

1296

last_approval_request = notifychangeproperty(

1297

datetime_to_dbus, "LastApprovalRequest")

1298

approved_by_default = notifychangeproperty(dbus.Boolean,

1299

"ApprovedByDefault")

1300

approval_delay = notifychangeproperty(dbus.UInt64,

1301

"ApprovalDelay",

1302

type_func =

1303

timedelta_to_milliseconds)

1304

approval_duration = notifychangeproperty(

1305

dbus.UInt64, "ApprovalDuration",

1306

type_func = timedelta_to_milliseconds)

1307

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

1308

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

1309

type_func =

1310

timedelta_to_milliseconds)

1311

extended_timeout = notifychangeproperty(

1312

dbus.UInt64, "ExtendedTimeout",

1313

type_func = timedelta_to_milliseconds)

1314

interval = notifychangeproperty(dbus.UInt64,

1315

"Interval",

1316

type_func =

1317

timedelta_to_milliseconds)

1318

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

1319

1320

del notifychangeproperty

783

1321

784

1322

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

785

1323

try:

794

1332

*args, **kwargs):

795

1333

self.checker_callback_tag = None

796

1334

self.checker = None

797

# Emit D-Bus signal

798

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

799

dbus.Boolean(False, variant_level=1))

800

1335

if os.WIFEXITED(condition):

801

1336

exitstatus = os.WEXITSTATUS(condition)

802

1337

# Emit D-Bus signal

812

1347

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

813

1348

*args, **kwargs)

814

1349

815

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

816

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

817

# Emit D-Bus signal

818

self.PropertyChanged(

819

dbus.String("LastCheckedOK"),

820

(self._datetime_to_dbus(self.last_checked_ok,

821

variant_level=1)))

822

return r

823

824

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

825

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

826

# Emit D-Bus signal

827

self.PropertyChanged(

828

dbus.String("LastApprovalRequest"),

829

(self._datetime_to_dbus(self.last_approval_request,

830

variant_level=1)))

831

return r

832

833

1350

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

834

1351

old_checker = self.checker

835

1352

if self.checker is not None:

842

1359

and old_checker_pid != self.checker.pid):

843

1360

# Emit D-Bus signal

844

1361

self.CheckerStarted(self.current_checker_command)

845

self.PropertyChanged(

846

dbus.String("CheckerRunning"),

847

dbus.Boolean(True, variant_level=1))

848

1362

return r

849

1363

850

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

851

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

852

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

853

if (old_checker is not None

854

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

855

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

856

dbus.Boolean(False, variant_level=1))

857

return r

858

859

1364

def _reset_approved(self):

860

self._approved = None

1365

self.approved = None

861

1366

return False

862

1367

863

1368

def approve(self, value=True):

864

self.send_changedstate()

865

self._approved = value

866

gobject.timeout_add(self._timedelta_to_milliseconds

1369

self.approved = value

1370

gobject.timeout_add(timedelta_to_milliseconds

867

1371

(self.approval_duration),

868

1372

self._reset_approved)

869

1373

self.send_changedstate()

870

1374

871

1375

## D-Bus methods, signals & properties

872

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

1376

_interface = "se.recompile.Mandos.Client"

1377

1378

## Interfaces

1379

1380

@dbus_interface_annotations(_interface)

1381

def _foo(self):

1382

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

1383

"false"}

873

1384

874

1385

## Signals

875

1386

922

1433

# CheckedOK - method

923

1434

@dbus.service.method(_interface)

924

1435

def CheckedOK(self):

925

return self.checked_ok()

1436

self.checked_ok()

926

1437

927

1438

# Enable - method

928

1439

@dbus.service.method(_interface)

961

1472

if value is None: # get

962

1473

return dbus.Boolean(self.approved_by_default)

963

1474

self.approved_by_default = bool(value)

964

# Emit D-Bus signal

965

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

966

dbus.Boolean(value, variant_level=1))

967

1475

968

1476

# ApprovalDelay - property

969

1477

@dbus_service_property(_interface, signature="t",

972

1480

if value is None: # get

973

1481

return dbus.UInt64(self.approval_delay_milliseconds())

974

1482

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

975

# Emit D-Bus signal

976

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

977

dbus.UInt64(value, variant_level=1))

978

1483

979

1484

# ApprovalDuration - property

980

1485

@dbus_service_property(_interface, signature="t",

981

1486

access="readwrite")

982

1487

def ApprovalDuration_dbus_property(self, value=None):

983

1488

if value is None: # get

984

return dbus.UInt64(self._timedelta_to_milliseconds(

1489

return dbus.UInt64(timedelta_to_milliseconds(

985

1490

self.approval_duration))

986

1491

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

987

# Emit D-Bus signal

988

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

989

dbus.UInt64(value, variant_level=1))

990

1492

991

1493

# Name - property

992

1494

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

1004

1506

def Host_dbus_property(self, value=None):

1005

1507

if value is None: # get

1006

1508

return dbus.String(self.host)

1007

self.host = value

1008

# Emit D-Bus signal

1009

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

1010

dbus.String(value, variant_level=1))

1509

self.host = unicode(value)

1011

1510

1012

1511

# Created - property

1013

1512

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

1014

1513

def Created_dbus_property(self):

1015

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

1514

return datetime_to_dbus(self.created)

1016

1515

1017

1516

# LastEnabled - property

1018

1517

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

1019

1518

def LastEnabled_dbus_property(self):

1020

if self.last_enabled is None:

1021

return dbus.String("")

1022

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

1519

return datetime_to_dbus(self.last_enabled)

1023

1520

1024

1521

# Enabled - property

1025

1522

@dbus_service_property(_interface, signature="b",

1039

1536

if value is not None:

1040

1537

self.checked_ok()

1041

1538

return

1042

if self.last_checked_ok is None:

1043

return dbus.String("")

1044

return dbus.String(self._datetime_to_dbus(self

1045

.last_checked_ok))

1539

return datetime_to_dbus(self.last_checked_ok)

1540

1541

# LastCheckerStatus - property

1542

@dbus_service_property(_interface, signature="n",

1543

access="read")

1544

def LastCheckerStatus_dbus_property(self):

1545

return dbus.Int16(self.last_checker_status)

1546

1547

# Expires - property

1548

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

1549

def Expires_dbus_property(self):

1550

return datetime_to_dbus(self.expires)

1046

1551

1047

1552

# LastApprovalRequest - property

1048

1553

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

1049

1554

def LastApprovalRequest_dbus_property(self):

1050

if self.last_approval_request is None:

1051

return dbus.String("")

1052

return dbus.String(self.

1053

_datetime_to_dbus(self

1054

.last_approval_request))

1555

return datetime_to_dbus(self.last_approval_request)

1055

1556

1056

1557

# Timeout - property

1057

1558

@dbus_service_property(_interface, signature="t",

1059

1560

def Timeout_dbus_property(self, value=None):

1060

1561

if value is None: # get

1061

1562

return dbus.UInt64(self.timeout_milliseconds())

1563

old_timeout = self.timeout

1062

1564

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

1063

# Emit D-Bus signal

1064

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

1065

dbus.UInt64(value, variant_level=1))

1066

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

1067

return

1068

# Reschedule timeout

1069

gobject.source_remove(self.disable_initiator_tag)

1070

self.disable_initiator_tag = None

1071

time_to_die = (self.

1072

_timedelta_to_milliseconds((self

1073

.last_checked_ok

1074

+ self.timeout)

1075

- datetime.datetime

1076

.utcnow()))

1077

if time_to_die <= 0:

1078

# The timeout has passed

1079

self.disable()

1080

else:

1081

self.disable_initiator_tag = (gobject.timeout_add

1082

(time_to_die, self.disable))

1565

# Reschedule disabling

1566

if self.enabled:

1567

now = datetime.datetime.utcnow()

1568

self.expires += self.timeout - old_timeout

1569

if self.expires <= now:

1570

# The timeout has passed

1571

self.disable()

1572

else:

1573

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

1574

is None):

1575

return

1576

gobject.source_remove(self.disable_initiator_tag)

1577

self.disable_initiator_tag = (

1578

gobject.timeout_add(

1579

timedelta_to_milliseconds(self.expires - now),

1580

self.disable))

1581

1582

# ExtendedTimeout - property

1583

@dbus_service_property(_interface, signature="t",

1584

access="readwrite")

1585

def ExtendedTimeout_dbus_property(self, value=None):

1586

if value is None: # get

1587

return dbus.UInt64(self.extended_timeout_milliseconds())

1588

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

1083

1589

1084

1590

# Interval - property

1085

1591

@dbus_service_property(_interface, signature="t",

1088

1594

if value is None: # get

1089

1595

return dbus.UInt64(self.interval_milliseconds())

1090

1596

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

1091

# Emit D-Bus signal

1092

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

1093

dbus.UInt64(value, variant_level=1))

1094

1597

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

1095

1598

return

1096

# Reschedule checker run

1097

gobject.source_remove(self.checker_initiator_tag)

1098

self.checker_initiator_tag = (gobject.timeout_add

1099

(value, self.start_checker))

1100

self.start_checker() # Start one now, too

1101

1599

if self.enabled:

1600

# Reschedule checker run

1601

gobject.source_remove(self.checker_initiator_tag)

1602

self.checker_initiator_tag = (gobject.timeout_add

1603

(value, self.start_checker))

1604

self.start_checker() # Start one now, too

1605

1102

1606

# Checker - property

1103

1607

@dbus_service_property(_interface, signature="s",

1104

1608

access="readwrite")

1105

1609

def Checker_dbus_property(self, value=None):

1106

1610

if value is None: # get

1107

1611

return dbus.String(self.checker_command)

1108

self.checker_command = value

1109

# Emit D-Bus signal

1110

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

1111

dbus.String(self.checker_command,

1112

variant_level=1))

1612

self.checker_command = unicode(value)

1113

1613

1114

1614

# CheckerRunning - property

1115

1615

@dbus_service_property(_interface, signature="b",

1142

1642

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

1143

1643

if not self._pipe.recv():

1144

1644

raise KeyError()

1145

1645

1146

1646

def __getattribute__(self, name):

1147

if(name == '_pipe'):

1647

if name == '_pipe':

1148

1648

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

1149

1649

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

1150

1650

data = self._pipe.recv()

1155

1655

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

1156

1656

return self._pipe.recv()[1]

1157

1657

return func

1158

1658

1159

1659

def __setattr__(self, name, value):

1160

if(name == '_pipe'):

1660

if name == '_pipe':

1161

1661

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

1162

1662

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

1163

1663

1174

1674

unicode(self.client_address))

1175

1675

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

1176

1676

self.server.child_pipe.fileno())

1177

1677

1178

1678

session = (gnutls.connection

1179

1679

.ClientSession(self.request,

1180

1680

gnutls.connection

1181

1681

.X509Credentials()))

1182

1682

1183

1683

# Note: gnutls.connection.X509Credentials is really a

1184

1684

# generic GnuTLS certificate credentials object so long as

1185

1685

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

1186

1686

# here despite using OpenPGP certificates.

1187

1687

1188

1688

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

1189

1689

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

1190

1690

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

1196

1696

(gnutls.library.functions

1197

1697

.gnutls_priority_set_direct(session._c_object,

1198

1698

priority, None))

1199

1699

1200

1700

# Start communication using the Mandos protocol

1201

1701

# Get protocol number

1202

1702

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

1203

1703

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

1204

1704

try:

1205

1705

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

1206

raise RuntimeError

1207

except (ValueError, IndexError, RuntimeError), error:

1706

raise RuntimeError(line)

1707

except (ValueError, IndexError, RuntimeError) as error:

1208

1708

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

1209

1709

return

1210

1710

1211

1711

# Start GnuTLS connection

1212

1712

try:

1213

1713

session.handshake()

1214

except gnutls.errors.GNUTLSError, error:

1714

except gnutls.errors.GNUTLSError as error:

1215

1715

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

1216

1716

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

1217

1717

# established. Just abandon the request.

1218

1718

return

1219

1719

logger.debug("Handshake succeeded")

1220

1720

1221

1721

approval_required = False

1222

1722

try:

1223

1723

try:

1224

1724

fpr = self.fingerprint(self.peer_certificate

1225

1725

(session))

1226

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

1726

except (TypeError,

1727

gnutls.errors.GNUTLSError) as error:

1227

1728

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

1228

1729

return

1229

1730

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

1230

1731

1231

1732

try:

1232

1733

client = ProxyClient(child_pipe, fpr,

1233

1734

self.client_address)

1241

1742

1242

1743

while True:

1243

1744

if not client.enabled:

1244

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

1745

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

1245

1746

client.name)

1246

1747

if self.server.use_dbus:

1247

1748

# Emit D-Bus signal

1248

client.Rejected("Disabled")

1749

client.Rejected("Disabled")

1249

1750

return

1250

1751

1251

if client._approved or not client.approval_delay:

1752

if client.approved or not client.approval_delay:

1252

1753

#We are approved or approval is disabled

1253

1754

break

1254

elif client._approved is None:

1755

elif client.approved is None:

1255

1756

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

1256

1757

client.name)

1257

1758

if self.server.use_dbus:

1268

1769

return

1269

1770

1270

1771

#wait until timeout or approved

1271

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

1272

1772

time = datetime.datetime.now()

1273

1773

client.changedstate.acquire()

1274

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

1774

client.changedstate.wait(

1775

float(timedelta_to_milliseconds(delay)

1776

/ 1000))

1275

1777

client.changedstate.release()

1276

1778

time2 = datetime.datetime.now()

1277

1779

if (time2 - time) >= delay:

1292

1794

while sent_size < len(client.secret):

1293

1795

try:

1294

1796

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

1295

except (gnutls.errors.GNUTLSError), error:

1296

logger.warning("gnutls send failed")

1797

except gnutls.errors.GNUTLSError as error:

1798

logger.warning("gnutls send failed",

1799

exc_info=error)

1297

1800

return

1298

1801

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

1299

1802

sent, len(client.secret)

1300

1803

- (sent_size + sent))

1301

1804

sent_size += sent

1302

1805

1303

1806

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

1304

# bump the timeout as if seen

1305

client.checked_ok()

1807

# bump the timeout using extended_timeout

1808

client.bump_timeout(client.extended_timeout)

1306

1809

if self.server.use_dbus:

1307

1810

# Emit D-Bus signal

1308

1811

client.GotSecret()

1312

1815

client.approvals_pending -= 1

1313

1816

try:

1314

1817

session.bye()

1315

except (gnutls.errors.GNUTLSError), error:

1316

logger.warning("GnuTLS bye failed")

1818

except gnutls.errors.GNUTLSError as error:

1819

logger.warning("GnuTLS bye failed",

1820

exc_info=error)

1317

1821

1318

1822

@staticmethod

1319

1823

def peer_certificate(session):

1375

1879

# Convert the buffer to a Python bytestring

1376

1880

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

1377

1881

# Convert the bytestring to hexadecimal notation

1378

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

1882

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

1379

1883

return hex_fpr

1380

1884

1381

1885

1384

1888

def sub_process_main(self, request, address):

1385

1889

try:

1386

1890

self.finish_request(request, address)

1387

except:

1891

except Exception:

1388

1892

self.handle_error(request, address)

1389

1893

self.close_request(request)

1390

1894

1391

1895

def process_request(self, request, address):

1392

1896

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

1393

multiprocessing.Process(target = self.sub_process_main,

1394

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

1897

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

1898

args = (request, address))

1899

proc.start()

1900

return proc

1901

1395

1902

1396

1903

class MultiprocessingMixInWithPipe(MultiprocessingMixIn, object):

1397

1904

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

1401

1908

This function creates a new pipe in self.pipe

1402

1909

"""

1403

1910

parent_pipe, self.child_pipe = multiprocessing.Pipe()

1404

1405

super(MultiprocessingMixInWithPipe,

1406

self).process_request(request, client_address)

1911

1912

proc = MultiprocessingMixIn.process_request(self, request,

1913

client_address)

1407

1914

self.child_pipe.close()

1408

self.add_pipe(parent_pipe)

1409

1410

def add_pipe(self, parent_pipe):

1915

self.add_pipe(parent_pipe, proc)

1916

1917

def add_pipe(self, parent_pipe, proc):

1411

1918

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

1412

raise NotImplementedError

1919

raise NotImplementedError()

1920

1413

1921

1414

1922

class IPv6_TCPServer(MultiprocessingMixInWithPipe,

1415

1923

socketserver.TCPServer, object):

1421

1929

use_ipv6: Boolean; to use IPv6 or not

1422

1930

"""

1423

1931

def __init__(self, server_address, RequestHandlerClass,

1424

interface=None, use_ipv6=True):

1932

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

1933

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

1934

creating a new one with socket.socket().

1935

"""

1425

1936

self.interface = interface

1426

1937

if use_ipv6:

1427

1938

self.address_family = socket.AF_INET6

1939

if socketfd is not None:

1940

# Save the file descriptor

1941

self.socketfd = socketfd

1942

# Save the original socket.socket() function

1943

self.socket_socket = socket.socket

1944

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

1945

#

1946

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

1947

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

1948

# patching socket.socket.)

1949

#

1950

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

1951

@functools.wraps(socket.socket)

1952

def socket_wrapper(*args, **kwargs):

1953

# Restore original function so subsequent calls are

1954

# not affected.

1955

socket.socket = self.socket_socket

1956

del self.socket_socket

1957

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

1958

# saved file descriptor.

1959

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

1960

# Replace socket.socket() function with wrapper

1961

socket.socket = socket_wrapper

1962

# The socketserver.TCPServer.__init__ will call

1963

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

1964

# socket_wrapper(), if socketfd was set.

1428

1965

socketserver.TCPServer.__init__(self, server_address,

1429

1966

RequestHandlerClass)

1967

1430

1968

def server_bind(self):

1431

1969

"""This overrides the normal server_bind() function

1432

1970

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

1440

1978

try:

1441

1979

self.socket.setsockopt(socket.SOL_SOCKET,

1442

1980

SO_BINDTODEVICE,

1443

str(self.interface

1444

+ '\0'))

1445

except socket.error, error:

1446

if error[0] == errno.EPERM:

1447

logger.error("No permission to"

1448

" bind to interface %s",

1449

self.interface)

1450

elif error[0] == errno.ENOPROTOOPT:

1981

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

1982

except socket.error as error:

1983

if error.errno == errno.EPERM:

1984

logger.error("No permission to bind to"

1985

" interface %s", self.interface)

1986

elif error.errno == errno.ENOPROTOOPT:

1451

1987

logger.error("SO_BINDTODEVICE not available;"

1452

1988

" cannot bind to interface %s",

1453

1989

self.interface)

1990

elif error.errno == errno.ENODEV:

1991

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

1992

" cannot bind", self.interface)

1454

1993

else:

1455

1994

raise

1456

1995

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

1459

1998

if self.address_family == socket.AF_INET6:

1460

1999

any_address = "::" # in6addr_any

1461

2000

else:

1462

any_address = socket.INADDR_ANY

2001

any_address = "0.0.0.0" # INADDR_ANY

1463

2002

self.server_address = (any_address,

1464

2003

self.server_address[1])

1465

2004

elif not self.server_address[1]:

1486

2025

"""

1487

2026

def __init__(self, server_address, RequestHandlerClass,

1488

2027

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

1489

gnutls_priority=None, use_dbus=True):

2028

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

1490

2029

self.enabled = False

1491

2030

self.clients = clients

1492

2031

if self.clients is None:

1493

self.clients = set()

2032

self.clients = {}

1494

2033

self.use_dbus = use_dbus

1495

2034

self.gnutls_priority = gnutls_priority

1496

2035

IPv6_TCPServer.__init__(self, server_address,

1497

2036

RequestHandlerClass,

1498

2037

interface = interface,

1499

use_ipv6 = use_ipv6)

2038

use_ipv6 = use_ipv6,

2039

socketfd = socketfd)

1500

2040

def server_activate(self):

1501

2041

if self.enabled:

1502

2042

return socketserver.TCPServer.server_activate(self)

2043

1503

2044

def enable(self):

1504

2045

self.enabled = True

1505

def add_pipe(self, parent_pipe):

2046

2047

def add_pipe(self, parent_pipe, proc):

1506

2048

# Call "handle_ipc" for both data and EOF events

1507

2049

gobject.io_add_watch(parent_pipe.fileno(),

1508

2050

gobject.IO_IN | gobject.IO_HUP,

1509

2051

functools.partial(self.handle_ipc,

1510

parent_pipe = parent_pipe))

1511

2052

parent_pipe =

2053

parent_pipe,

2054

proc = proc))

2055

1512

2056

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

1513

client_object=None):

1514

condition_names = {

1515

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

1516

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

1517

# blocking).

1518

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

1519

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

1520

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

1521

# broken, usually for pipes and

1522

# sockets).

1523

}

1524

conditions_string = ' | '.join(name

1525

for cond, name in

1526

condition_names.iteritems()

1527

if cond & condition)

1528

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

1529

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

2057

proc = None, client_object=None):

2058

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

2059

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

2060

# Wait for other process to exit

2061

proc.join()

1530

2062

return False

1531

2063

1532

2064

# Read a request from the child

1537

2069

fpr = request[1]

1538

2070

address = request[2]

1539

2071

1540

for c in self.clients:

2072

for c in self.clients.itervalues():

1541

2073

if c.fingerprint == fpr:

1542

2074

client = c

1543

2075

break

1544

2076

else:

1545

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

1546

"dress: %s", fpr, address)

2077

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

2078

"dress: %s", fpr, address)

1547

2079

if self.use_dbus:

1548

2080

# Emit D-Bus signal

1549

mandos_dbus_service.ClientNotFound(fpr, address[0])

2081

mandos_dbus_service.ClientNotFound(fpr,

2082

address[0])

1550

2083

parent_pipe.send(False)

1551

2084

return False

1552

2085

1553

2086

gobject.io_add_watch(parent_pipe.fileno(),

1554

2087

gobject.IO_IN | gobject.IO_HUP,

1555

2088

functools.partial(self.handle_ipc,

1556

parent_pipe = parent_pipe,

1557

client_object = client))

2089

parent_pipe =

2090

parent_pipe,

2091

proc = proc,

2092

client_object =

2093

client))

1558

2094

parent_pipe.send(True)

1559

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

2095

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

2096

# same fileno

1560

2097

return False

1561

2098

if command == 'funcall':

1562

2099

funcname = request[1]

1563

2100

args = request[2]

1564

2101

kwargs = request[3]

1565

2102

1566

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

1567

2103

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

2104

funcname)(*args,

2105

**kwargs)))

2106

1568

2107

if command == 'getattr':

1569

2108

attrname = request[1]

1570

2109

if callable(client_object.__getattribute__(attrname)):

1571

2110

parent_pipe.send(('function',))

1572

2111

else:

1573

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

2112

parent_pipe.send(('data', client_object

2113

.__getattribute__(attrname)))

1574

2114

1575

2115

if command == 'setattr':

1576

2116

attrname = request[1]

1577

2117

value = request[2]

1578

2118

setattr(client_object, attrname, value)

1579

2119

1580

2120

return True

1581

2121

1582

2122

2123

def rfc3339_duration_to_delta(duration):

2124

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

2125

2126

>>> rfc3339_duration_to_delta("P7D")

2127

datetime.timedelta(7)

2128

>>> rfc3339_duration_to_delta("PT60S")

2129

datetime.timedelta(0, 60)

2130

>>> rfc3339_duration_to_delta("PT60M")

2131

datetime.timedelta(0, 3600)

2132

>>> rfc3339_duration_to_delta("PT24H")

2133

datetime.timedelta(1)

2134

>>> rfc3339_duration_to_delta("P1W")

2135

datetime.timedelta(7)

2136

>>> rfc3339_duration_to_delta("PT5M30S")

2137

datetime.timedelta(0, 330)

2138

>>> rfc3339_duration_to_delta("P1DT3M20S")

2139

datetime.timedelta(1, 200)

2140

"""

2141

2142

# Parsing an RFC 3339 duration with regular expressions is not

2143

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

2144

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

2145

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

2146

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

2147

# avoid excessive use of external libraries.

2148

2149

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

2150

Token = collections.namedtuple("Token",

2151

("regexp", # To match token; if

2152

# "value" is not None,

2153

# must have a "group"

2154

# containing digits

2155

"value", # datetime.timedelta or

2156

# None

2157

"followers")) # Tokens valid after

2158

# this token

2159

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

2160

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

2161

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

2162

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

2163

datetime.timedelta(seconds=1),

2164

frozenset((token_end,)))

2165

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

2166

datetime.timedelta(minutes=1),

2167

frozenset((token_second, token_end)))

2168

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

2169

datetime.timedelta(hours=1),

2170

frozenset((token_minute, token_end)))

2171

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

2172

None,

2173

frozenset((token_hour, token_minute,

2174

token_second)))

2175

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

2176

datetime.timedelta(days=1),

2177

frozenset((token_time, token_end)))

2178

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

2179

datetime.timedelta(weeks=4),

2180

frozenset((token_day, token_end)))

2181

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

2182

datetime.timedelta(weeks=52),

2183

frozenset((token_month, token_end)))

2184

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

2185

datetime.timedelta(weeks=1),

2186

frozenset((token_end,)))

2187

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

2188

frozenset((token_year, token_month,

2189

token_day, token_time,

2190

token_week))),

2191

# Define starting values

2192

value = datetime.timedelta() # Value so far

2193

found_token = None

2194

followers = frozenset(token_duration,) # Following valid tokens

2195

s = duration # String left to parse

2196

# Loop until end token is found

2197

while found_token is not token_end:

2198

# Search for any currently valid tokens

2199

for token in followers:

2200

match = token.regexp.match(s)

2201

if match is not None:

2202

# Token found

2203

if token.value is not None:

2204

# Value found, parse digits

2205

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

2206

# Add to value so far

2207

value += factor * token.value

2208

# Strip token from string

2209

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

2210

# Go to found token

2211

found_token = token

2212

# Set valid next tokens

2213

followers = found_token.followers

2214

break

2215

else:

2216

# No currently valid tokens were found

2217

raise ValueError("Invalid RFC 3339 duration")

2218

# End token found

2219

return value

2220

2221

1583

2222

def string_to_delta(interval):

1584

2223

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

1585

2224

1596

2235

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

1597

2236

datetime.timedelta(0, 330)

1598

2237

"""

2238

2239

try:

2240

return rfc3339_duration_to_delta(interval)

2241

except ValueError:

2242

pass

2243

1599

2244

timevalue = datetime.timedelta(0)

1600

2245

for s in interval.split():

1601

2246

try:

1612

2257

elif suffix == "w":

1613

2258

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

1614

2259

else:

1615

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

1616

except (ValueError, IndexError), e:

2260

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

2261

.format(suffix))

2262

except IndexError as e:

1617

2263

raise ValueError(*(e.args))

1618

2264

timevalue += delta

1619

2265

return timevalue

1620

2266

1621

2267

1622

def if_nametoindex(interface):

1623

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

1624

1625

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

1626

global if_nametoindex

1627

try:

1628

if_nametoindex = (ctypes.cdll.LoadLibrary

1629

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

1630

.if_nametoindex)

1631

except (OSError, AttributeError):

1632

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

1633

def if_nametoindex(interface):

1634

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

1635

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

1636

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

1637

ifreq = fcntl.ioctl(s, SIOCGIFINDEX,

1638

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

1639

interface))

1640

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

1641

ifreq[16:20])[0]

1642

return interface_index

1643

return if_nametoindex(interface)

1644

1645

1646

2268

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

1647

2269

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

1648

2270

1656

2278

sys.exit()

1657

2279

if not noclose:

1658

2280

# Close all standard open file descriptors

1659

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

2281

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

1660

2282

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

1661

2283

raise OSError(errno.ENODEV,

1662

"%s not a character device"

1663

% os.path.devnull)

2284

"{0} not a character device"

2285

.format(os.devnull))

1664

2286

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

1665

2287

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

1666

2288

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

1673

2295

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

1674

2296

# Parsing of options, both command line and config file

1675

2297

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]

2298

parser = argparse.ArgumentParser()

2299

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

2300

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

2301

help="show version number and exit")

2302

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

2303

help="Bind to interface IF")

2304

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

2305

help="Address to listen for requests on")

2306

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

2307

help="Port number to receive requests on")

2308

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

2309

help="Run self-test")

2310

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

2311

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

2312

" to terminal", default=None)

2313

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

2314

help="Debug level for stdout output")

2315

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

2316

" priority string (see GnuTLS documentation)")

2317

parser.add_argument("--servicename",

2318

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

2319

parser.add_argument("--configdir",

2320

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

2321

help="Directory to search for configuration"

2322

" files")

2323

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

2324

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

2325

" system bus interface", default=None)

2326

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

2327

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

2328

default=None)

2329

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

2330

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

2331

" state", default=None)

2332

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

2333

help="Specify a file descriptor to a network"

2334

" socket to use instead of creating one")

2335

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

2336

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

2337

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

2338

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

2339

2340

options = parser.parse_args()

1704

2341

1705

2342

if options.check:

1706

2343

import doctest

1713

2350

"port": "",

1714

2351

"debug": "False",

1715

2352

"priority":

1716

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

2353

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

1717

2354

"servicename": "Mandos",

1718

2355

"use_dbus": "True",

1719

2356

"use_ipv6": "True",

1720

2357

"debuglevel": "",

2358

"restore": "True",

2359

"socket": "",

2360

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

2361

"foreground": "False",

1721

2362

}

1722

2363

1723

2364

# Parse config file for server-global settings

1728

2369

# Convert the SafeConfigParser object to a dict

1729

2370

server_settings = server_config.defaults()

1730

2371

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

1731

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

2372

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

1732

2373

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

1733

2374

option)

1734

2375

if server_settings["port"]:

1735

2376

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

1736

2377

"port")

2378

if server_settings["socket"]:

2379

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

2380

"socket")

2381

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

2382

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

2383

# happen with a supplied network socket.

2384

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

2385

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

2386

["socket"])

1737

2387

del server_config

1738

2388

1739

2389

# Override the settings from the config file with command line

1740

2390

# options, if set.

1741

2391

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

1742

2392

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

1743

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

2393

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

2394

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

1744

2395

value = getattr(options, option)

1745

2396

if value is not None:

1746

2397

server_settings[option] = value

1749

2400

for option in server_settings.keys():

1750

2401

if type(server_settings[option]) is str:

1751

2402

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

2403

# Force all boolean options to be boolean

2404

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

2405

"foreground"):

2406

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

2407

# Debug implies foreground

2408

if server_settings["debug"]:

2409

server_settings["foreground"] = True

1752

2410

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

1753

2411

1754

2412

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

1758

2416

debuglevel = server_settings["debuglevel"]

1759

2417

use_dbus = server_settings["use_dbus"]

1760

2418

use_ipv6 = server_settings["use_ipv6"]

1761

2419

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

2420

stored_state_file)

2421

foreground = server_settings["foreground"]

2422

2423

if debug:

2424

initlogger(debug, logging.DEBUG)

2425

else:

2426

if not debuglevel:

2427

initlogger(debug)

2428

else:

2429

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

2430

initlogger(debug, level)

2431

1762

2432

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

1763

2433

syslogger.setFormatter(logging.Formatter

1764

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

1765

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

1766

% server_settings["servicename"]))

2434

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

2435

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

2436

.format(server_settings

2437

["servicename"])))

1767

2438

1768

2439

# Parse config file with clients

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)

2440

client_config = configparser.SafeConfigParser(Client

2441

.client_defaults)

1777

2442

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

1778

2443

"clients.conf"))

1779

2444

1788

2453

use_ipv6=use_ipv6,

1789

2454

gnutls_priority=

1790

2455

server_settings["priority"],

1791

use_dbus=use_dbus)

1792

if not debug:

1793

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

2456

use_dbus=use_dbus,

2457

socketfd=(server_settings["socket"]

2458

or None))

2459

if not foreground:

2460

pidfilename = "/run/mandos.pid"

2461

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

2462

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

2463

pidfile = None

1794

2464

try:

1795

2465

pidfile = open(pidfilename, "w")

1796

except IOError:

1797

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

2466

except IOError as e:

2467

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

2468

exc_info=e)

1798

2469

1799

try:

1800

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

1801

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

1802

except KeyError:

2470

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

1803

2471

try:

1804

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

1805

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

2472

uid = pwd.getpwnam(name).pw_uid

2473

gid = pwd.getpwnam(name).pw_gid

2474

break

1806

2475

except KeyError:

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

2476

continue

2477

else:

2478

uid = 65534

2479

gid = 65534

1813

2480

try:

1814

2481

os.setgid(gid)

1815

2482

os.setuid(uid)

1816

except OSError, error:

1817

if error[0] != errno.EPERM:

1818

raise error

2483

except OSError as error:

2484

if error.errno != errno.EPERM:

2485

raise

1819

2486

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

1828

2487

if debug:

1829

2488

# Enable all possible GnuTLS debugging

1830

2489

1840

2499

.gnutls_global_set_log_function(debug_gnutls))

1841

2500

1842

2501

# Redirect stdin so all checkers get /dev/null

1843

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

2502

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

1844

2503

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

1845

2504

if null > 2:

1846

2505

os.close(null)

1847

else:

1848

# No console logging

1849

logger.removeHandler(console)

1850

2506

1851

2507

# Need to fork before connecting to D-Bus

1852

if not debug:

2508

if not foreground:

1853

2509

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

1854

2510

daemon()

1855

2511

2512

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

2513

# need to inform gobject that threads will be used.

2514

gobject.threads_init()

2515

1856

2516

global main_loop

1857

2517

# From the Avahi example code

1858

DBusGMainLoop(set_as_default=True )

2518

DBusGMainLoop(set_as_default=True)

1859

2519

main_loop = gobject.MainLoop()

1860

2520

bus = dbus.SystemBus()

1861

2521

# End of Avahi example code

1862

2522

if use_dbus:

1863

2523

try:

1864

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

2524

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

1865

2525

bus, do_not_queue=True)

1866

except dbus.exceptions.NameExistsException, e:

1867

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

2526

old_bus_name = (dbus.service.BusName

2527

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

2528

do_not_queue=True))

2529

except dbus.exceptions.NameExistsException as e:

2530

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

1868

2531

use_dbus = False

1869

2532

server_settings["use_dbus"] = False

1870

2533

tcp_server.use_dbus = False

1871

2534

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)

2535

service = AvahiServiceToSyslog(name =

2536

server_settings["servicename"],

2537

servicetype = "_mandos._tcp",

2538

protocol = protocol, bus = bus)

1875

2539

if server_settings["interface"]:

1876

2540

service.interface = (if_nametoindex

1877

2541

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

1882

2546

client_class = Client

1883

2547

if use_dbus:

1884

2548

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

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):

2549

2550

client_settings = Client.config_parser(client_config)

2551

old_client_settings = {}

2552

clients_data = {}

2553

2554

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

2555

global wnull

2556

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

2557

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

2558

# mode

2559

if debug or not foreground:

2560

wnull.close()

2561

2562

# Get client data and settings from last running state.

2563

if server_settings["restore"]:

2564

try:

2565

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

2566

clients_data, old_client_settings = (pickle.load

2567

(stored_state))

2568

os.remove(stored_state_path)

2569

except IOError as e:

2570

if e.errno == errno.ENOENT:

2571

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

2572

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

2573

else:

2574

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

2575

exc_info=e)

2576

raise

2577

except EOFError as e:

2578

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

2579

"EOFError:", exc_info=e)

2580

2581

with PGPEngine() as pgp:

2582

for client_name, client in clients_data.iteritems():

2583

# Skip removed clients

2584

if client_name not in client_settings:

2585

continue

2586

2587

# Decide which value to use after restoring saved state.

2588

# We have three different values: Old config file,

2589

# new config file, and saved state.

2590

# New config value takes precedence if it differs from old

2591

# config value, otherwise use saved state.

2592

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

2593

try:

2594

# For each value in new config, check if it

2595

# differs from the old config value (Except for

2596

# the "secret" attribute)

2597

if (name != "secret" and

2598

value != old_client_settings[client_name]

2599

[name]):

2600

client[name] = value

2601

except KeyError:

2602

pass

2603

2604

# Clients who has passed its expire date can still be

2605

# enabled if its last checker was successful. Clients

2606

# whose checker succeeded before we stored its state is

2607

# assumed to have successfully run all checkers during

2608

# downtime.

2609

if client["enabled"]:

2610

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

2611

if not client["last_checked_ok"]:

2612

logger.warning(

2613

"disabling client {0} - Client never "

2614

"performed a successful checker"

2615

.format(client_name))

2616

client["enabled"] = False

2617

elif client["last_checker_status"] != 0:

2618

logger.warning(

2619

"disabling client {0} - Client "

2620

"last checker failed with error code {1}"

2621

.format(client_name,

2622

client["last_checker_status"]))

2623

client["enabled"] = False

2624

else:

2625

client["expires"] = (datetime.datetime

2626

.utcnow()

2627

+ client["timeout"])

2628

logger.debug("Last checker succeeded,"

2629

" keeping {0} enabled"

2630

.format(client_name))

1892

2631

try:

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()))

2632

client["secret"] = (

2633

pgp.decrypt(client["encrypted_secret"],

2634

client_settings[client_name]

2635

["secret"]))

2636

except PGPError:

2637

# If decryption fails, we use secret from new settings

2638

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

2639

.format(client_name))

2640

client["secret"] = (

2641

client_settings[client_name]["secret"])

2642

2643

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

2644

for client_name in (set(old_client_settings)

2645

- set(client_settings)):

2646

del clients_data[client_name]

2647

for client_name in (set(client_settings)

2648

- set(old_client_settings)):

2649

clients_data[client_name] = client_settings[client_name]

2650

2651

# Create all client objects

2652

for client_name, client in clients_data.iteritems():

2653

tcp_server.clients[client_name] = client_class(

2654

name = client_name, settings = client,

2655

server_settings = server_settings)

2656

1902

2657

if not tcp_server.clients:

1903

2658

logger.warning("No clients defined")

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

2659

2660

if not foreground:

2661

if pidfile is not None:

2662

try:

2663

with pidfile:

2664

pid = os.getpid()

2665

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

2666

except IOError:

2667

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

2668

pidfilename, pid)

2669

del pidfile

1917

2670

del pidfilename

1918

1919

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

1920

2671

1921

2672

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

1922

2673

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

1923

2674

1924

2675

if use_dbus:

1925

class MandosDBusService(dbus.service.Object):

2676

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

2677

"se.bsnet.fukt.Mandos"})

2678

class MandosDBusService(DBusObjectWithProperties):

1926

2679

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

1927

2680

def __init__(self):

1928

2681

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

1929

_interface = "se.bsnet.fukt.Mandos"

2682

_interface = "se.recompile.Mandos"

2683

2684

@dbus_interface_annotations(_interface)

2685

def _foo(self):

2686

return { "org.freedesktop.DBus.Property"

2687

".EmitsChangedSignal":

2688

"false"}

1930

2689

1931

2690

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

1932

2691

def ClientAdded(self, objpath):

1947

2706

def GetAllClients(self):

1948

2707

"D-Bus method"

1949

2708

return dbus.Array(c.dbus_object_path

1950

for c in tcp_server.clients)

2709

for c in

2710

tcp_server.clients.itervalues())

1951

2711

1952

2712

@dbus.service.method(_interface,

1953

2713

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

1955

2715

"D-Bus method"

1956

2716

return dbus.Dictionary(

1957

2717

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

1958

for c in tcp_server.clients),

2718

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

1959

2719

signature="oa{sv}")

1960

2720

1961

2721

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

1962

2722

def RemoveClient(self, object_path):

1963

2723

"D-Bus method"

1964

for c in tcp_server.clients:

2724

for c in tcp_server.clients.itervalues():

1965

2725

if c.dbus_object_path == object_path:

1966

tcp_server.clients.remove(c)

2726

del tcp_server.clients[c.name]

1967

2727

c.remove_from_connection()

1968

2728

# Don't signal anything except ClientRemoved

1969

2729

c.disable(quiet=True)

1980

2740

"Cleanup function; run on exit"

1981

2741

service.cleanup()

1982

2742

2743

multiprocessing.active_children()

2744

wnull.close()

2745

if not (tcp_server.clients or client_settings):

2746

return

2747

2748

# Store client before exiting. Secrets are encrypted with key

2749

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

2750

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

2751

clients = {}

2752

with PGPEngine() as pgp:

2753

for client in tcp_server.clients.itervalues():

2754

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

2755

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

2756

key)

2757

client_dict = {}

2758

2759

# A list of attributes that can not be pickled

2760

# + secret.

2761

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

2762

"checker", "server_settings"))

2763

for name, typ in (inspect.getmembers

2764

(dbus.service.Object)):

2765

exclude.add(name)

2766

2767

client_dict["encrypted_secret"] = (client

2768

.encrypted_secret)

2769

for attr in client.client_structure:

2770

if attr not in exclude:

2771

client_dict[attr] = getattr(client, attr)

2772

2773

clients[client.name] = client_dict

2774

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

2775

2776

try:

2777

with (tempfile.NamedTemporaryFile

2778

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

2779

dir=os.path.dirname(stored_state_path),

2780

delete=False)) as stored_state:

2781

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

2782

tempname=stored_state.name

2783

os.rename(tempname, stored_state_path)

2784

except (IOError, OSError) as e:

2785

if not debug:

2786

try:

2787

os.remove(tempname)

2788

except NameError:

2789

pass

2790

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

2791

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

2792

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

2793

else:

2794

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

2795

exc_info=e)

2796

raise

2797

2798

# Delete all clients, and settings from config

1983

2799

while tcp_server.clients:

1984

client = tcp_server.clients.pop()

2800

name, client = tcp_server.clients.popitem()

1985

2801

if use_dbus:

1986

2802

client.remove_from_connection()

1987

client.disable_hook = None

1988

2803

# Don't signal anything except ClientRemoved

1989

2804

client.disable(quiet=True)

1990

2805

if use_dbus:

1991

2806

# Emit D-Bus signal

1992

mandos_dbus_service.ClientRemoved(client.dbus_object_path,

2807

mandos_dbus_service.ClientRemoved(client

2808

.dbus_object_path,

1993

2809

client.name)

2810

client_settings.clear()

1994

2811

1995

2812

atexit.register(cleanup)

1996

2813

1997

for client in tcp_server.clients:

2814

for client in tcp_server.clients.itervalues():

1998

2815

if use_dbus:

1999

2816

# Emit D-Bus signal

2000

2817

mandos_dbus_service.ClientAdded(client.dbus_object_path)

2001

client.enable()

2818

# Need to initiate checking of clients

2819

if client.enabled:

2820

client.init_checker()

2002

2821

2003

2822

tcp_server.enable()

2004

2823

tcp_server.server_activate()

2007

2826

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

2008

2827

if use_ipv6:

2009

2828

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

2010

" flowinfo %d, scope_id %d"

2011

% tcp_server.socket.getsockname())

2829

" flowinfo %d, scope_id %d",

2830

*tcp_server.socket.getsockname())

2012

2831

else: # IPv4

2013

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

2014

% tcp_server.socket.getsockname())

2832

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

2833

*tcp_server.socket.getsockname())

2015

2834

2016

2835

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

2017

2836

2019

2838

# From the Avahi example code

2020

2839

try:

2021

2840

service.activate()

2022

except dbus.exceptions.DBusException, error:

2023

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

2841

except dbus.exceptions.DBusException as error:

2842

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

2024

2843

cleanup()

2025

2844

sys.exit(1)

2026

2845

# End of Avahi example code

2032

2851

2033

2852

logger.debug("Starting main loop")

2034

2853

main_loop.run()

2035

except AvahiError, error:

2036

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

2854

except AvahiError as error:

2855

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

2037

2856

cleanup()

2038

2857

sys.exit(1)

2039

2858

except KeyboardInterrupt: