/mandos/release : revision 237.7.19

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

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#

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# Everything else is

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#

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

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

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# along with this program. If not, see

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

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#

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

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

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#

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from __future__ import (division, absolute_import, print_function,

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unicode_literals)

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from future_builtins import *

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import SocketServer as socketserver

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import socket

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import argparse

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import optparse

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import datetime

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import errno

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import gnutls.crypto

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import functools

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import cPickle as pickle

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import multiprocessing

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import types

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import binascii

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import tempfile

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import itertools

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import collections

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import dbus

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import dbus.service

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except ImportError:

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SO_BINDTODEVICE = None

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version = "1.6.4"

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stored_state_file = "clients.pickle"

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logger = logging.getLogger()

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syslogger = None

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try:

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if_nametoindex = (ctypes.cdll.LoadLibrary

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

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.if_nametoindex)

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except (OSError, AttributeError):

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def if_nametoindex(interface):

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

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

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

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ifreq = fcntl.ioctl(s, SIOCGIFINDEX,

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

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interface))

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

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ifreq[16:20])[0]

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return interface_index

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

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"""init logger and add loglevel"""

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syslogger = (logging.handlers.SysLogHandler

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(facility =

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logging.handlers.SysLogHandler.LOG_DAEMON,

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

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syslogger.setFormatter(logging.Formatter

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

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' %(message)s'))

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logger.addHandler(syslogger)

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if debug:

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console = logging.StreamHandler()

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

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' [%(process)d]:'

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' %(levelname)s:'

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' %(message)s'))

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logger.addHandler(console)

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logger.setLevel(level)

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class PGPError(Exception):

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

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pass

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class PGPEngine(object):

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

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def __init__(self):

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

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self.gnupgargs = ['--batch',

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'--home', self.tempdir,

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'--force-mdc',

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'--quiet',

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'--no-use-agent']

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def __enter__(self):

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return self

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

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self._cleanup()

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return False

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def __del__(self):

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self._cleanup()

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def _cleanup(self):

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if self.tempdir is not None:

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# Delete contents of tempdir

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

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topdown = False):

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for filename in files:

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

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for dirname in dirs:

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

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# Remove tempdir

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os.rmdir(self.tempdir)

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self.tempdir = None

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def password_encode(self, password):

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

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

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

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if len(encoded) > 2048:

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

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

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

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

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return encoded

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def encrypt(self, data, password):

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passphrase = self.password_encode(password)

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with tempfile.NamedTemporaryFile(dir=self.tempdir

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) as passfile:

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passfile.write(passphrase)

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passfile.flush()

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

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'--passphrase-file',

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passfile.name]

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+ self.gnupgargs,

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stdin = subprocess.PIPE,

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stdout = subprocess.PIPE,

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stderr = subprocess.PIPE)

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

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if proc.returncode != 0:

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raise PGPError(err)

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return ciphertext

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def decrypt(self, data, password):

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passphrase = self.password_encode(password)

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with tempfile.NamedTemporaryFile(dir = self.tempdir

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) as passfile:

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passfile.write(passphrase)

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passfile.flush()

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

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'--passphrase-file',

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passfile.name]

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+ self.gnupgargs,

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stdin = subprocess.PIPE,

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stdout = subprocess.PIPE,

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stderr = subprocess.PIPE)

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decrypted_plaintext, err = proc.communicate(input

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= data)

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if proc.returncode != 0:

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raise PGPError(err)

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return decrypted_plaintext

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version = "1.2.3"

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#logger = logging.getLogger('mandos')

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logger = logging.Logger('mandos')

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syslogger = (logging.handlers.SysLogHandler

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(facility = logging.handlers.SysLogHandler.LOG_DAEMON,

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

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syslogger.setFormatter(logging.Formatter

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

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' %(message)s'))

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logger.addHandler(syslogger)

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console = logging.StreamHandler()

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console.setFormatter(logging.Formatter('%(name)s [%(process)d]:'

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' %(levelname)s:'

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' %(message)s'))

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logger.addHandler(console)

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class AvahiError(Exception):

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

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Used to optionally bind to the specified interface.

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name: string; Example: 'Mandos'

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

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

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

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port: integer; what port to announce

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TXT: list of strings; TXT record for the service

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

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server: D-Bus Server

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bus: dbus.SystemBus()

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"""

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

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

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

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self.group = None # our entry group

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self.server = None

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self.bus = bus

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self.entry_group_state_changed_match = None

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def rename(self):

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

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if self.rename_count >= self.max_renames:

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" after %i retries, exiting.",

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self.rename_count)

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raise AvahiServiceError("Too many renames")

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self.name = unicode(self.server

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.GetAlternativeServiceName(self.name))

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

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

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self.name)

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syslogger.setFormatter(logging.Formatter

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

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

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% self.name))

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self.remove()

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try:

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self.add()

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except dbus.exceptions.DBusException as error:

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

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except dbus.exceptions.DBusException, error:

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

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self.cleanup()

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os._exit(1)

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self.rename_count += 1

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def remove(self):

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

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if self.entry_group_state_changed_match is not None:

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self.entry_group_state_changed_match.remove()

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self.entry_group_state_changed_match = None

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if self.group is not None:

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self.group.Reset()

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def add(self):

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

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self.remove()

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if self.group is None:

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self.group = dbus.Interface(

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self.bus.get_object(avahi.DBUS_NAME,

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self.server.EntryGroupNew()),

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avahi.DBUS_INTERFACE_ENTRY_GROUP)

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self.entry_group_state_changed_match = (

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self.group.connect_to_signal(

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'StateChanged', self.entry_group_state_changed))

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self.group.connect_to_signal('StateChanged',

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self

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.entry_group_state_changed)

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

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self.name, self.type)

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self.group.AddService(

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dbus.UInt16(self.port),

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avahi.string_array_to_txt_array(self.TXT))

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self.group.Commit()

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def entry_group_state_changed(self, state, error):

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

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

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elif state == avahi.ENTRY_GROUP_FAILURE:

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

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unicode(error))

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

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.format(error))

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raise AvahiGroupError("State changed: %s"

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% unicode(error))

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def cleanup(self):

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

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if self.group is not None:

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try:

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self.group.Free()

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except (dbus.exceptions.UnknownMethodException,

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dbus.exceptions.DBusException):

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pass

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self.group.Free()

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self.group = None

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self.remove()

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

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def server_state_changed(self, state):

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

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

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bad_states = { avahi.SERVER_INVALID:

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"Zeroconf server invalid",

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avahi.SERVER_REGISTERING: None,

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avahi.SERVER_COLLISION:

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"Zeroconf server name collision",

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avahi.SERVER_FAILURE:

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"Zeroconf server failure" }

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if state in bad_states:

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if bad_states[state] is not None:

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if error is None:

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logger.error(bad_states[state])

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else:

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

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self.cleanup()

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if state == avahi.SERVER_COLLISION:

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logger.error("Zeroconf server name collision")

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self.remove()

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elif state == avahi.SERVER_RUNNING:

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self.add()

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else:

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if error is None:

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

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else:

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

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def activate(self):

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

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if self.server is None:

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self.server = dbus.Interface(

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self.bus.get_object(avahi.DBUS_NAME,

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avahi.DBUS_PATH_SERVER,

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follow_name_owner_changes=True),

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avahi.DBUS_PATH_SERVER),

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avahi.DBUS_INTERFACE_SERVER)

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self.server.connect_to_signal("StateChanged",

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self.server_state_changed)

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

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class AvahiServiceToSyslog(AvahiService):

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def rename(self):

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

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ret = AvahiService.rename(self)

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syslogger.setFormatter(logging.Formatter

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

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

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.format(self.name)))

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return ret

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def timedelta_to_milliseconds(td):

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"Convert a datetime.timedelta() to milliseconds"

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

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+ (td.seconds * 1000)

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+ (td.microseconds // 1000))

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class Client(object):

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

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Attributes:

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

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

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

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

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

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

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checker_initiator_tag: a gobject event source tag, or None

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

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client_structure: Object describing what attributes a client has

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and is used for storing the client at exit

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current_checker_command: string; current running checker_command

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

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disable_initiator_tag: a gobject event source tag, or None

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enabled: bool()

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

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

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

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

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last_checker_status: integer between 0 and 255 reflecting exit

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status of last checker. -1 reflects crashed

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checker, -2 means no checker completed yet.

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

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last_enabled: datetime.datetime(); (UTC)

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

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D-Bus identifiers

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

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

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until this client is disabled

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extended_timeout: extra long timeout when secret has been sent

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runtime_expansions: Allowed attributes for runtime expansion.

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

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disabled, or None

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server_settings: The server_settings dict from main()

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"""

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runtime_expansions = ("approval_delay", "approval_duration",

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

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

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"last_approval_request", "last_checked_ok",

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

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

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

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client_defaults = { "timeout": "PT5M",

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"extended_timeout": "PT15M",

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"interval": "PT2M",

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

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"host": "",

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"approval_delay": "PT0S",

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"approval_duration": "PT1S",

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"approved_by_default": "True",

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"enabled": "True",

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}

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@staticmethod

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def _timedelta_to_milliseconds(td):

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"Convert a datetime.timedelta() to milliseconds"

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

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+ (td.seconds * 1000)

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+ (td.microseconds // 1000))

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def timeout_milliseconds(self):

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"Return the 'timeout' attribute in milliseconds"

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return timedelta_to_milliseconds(self.timeout)

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def extended_timeout_milliseconds(self):

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"Return the 'extended_timeout' attribute in milliseconds"

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return timedelta_to_milliseconds(self.extended_timeout)

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return self._timedelta_to_milliseconds(self.timeout)

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def interval_milliseconds(self):

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"Return the 'interval' attribute in milliseconds"

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return timedelta_to_milliseconds(self.interval)

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return self._timedelta_to_milliseconds(self.interval)

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def approval_delay_milliseconds(self):

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return timedelta_to_milliseconds(self.approval_delay)

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@staticmethod

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def config_parser(config):

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

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

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with exceptions for any special settings as defined above.

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

491

value given the same arguments.

492

"""

493

settings = {}

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for client_name in config.sections():

495

section = dict(config.items(client_name))

496

client = settings[client_name] = {}

497

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

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# Reformat values from string types to Python types

500

client["approved_by_default"] = config.getboolean(

501

client_name, "approved_by_default")

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

503

"enabled")

504

505

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

506

.replace(" ", ""))

507

if "secret" in section:

508

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

509

elif "secfile" in section:

510

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

511

(section["secfile"])),

512

"rb") as secfile:

513

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

514

else:

515

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

516

.format(section))

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

518

client["extended_timeout"] = string_to_delta(

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section["extended_timeout"])

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

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client["approval_delay"] = string_to_delta(

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section["approval_delay"])

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client["approval_duration"] = string_to_delta(

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section["approval_duration"])

525

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

526

client["last_approval_request"] = None

527

client["last_checked_ok"] = None

528

client["last_checker_status"] = -2

529

530

return settings

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532

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

297

return self._timedelta_to_milliseconds(self.approval_delay)

298

299

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

300

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

301

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

302

attribute."""

533

303

self.name = name

534

if server_settings is None:

535

server_settings = {}

536

self.server_settings = server_settings

537

# adding all client settings

538

for setting, value in settings.iteritems():

539

setattr(self, setting, value)

540

541

if self.enabled:

542

if not hasattr(self, "last_enabled"):

543

self.last_enabled = datetime.datetime.utcnow()

544

if not hasattr(self, "expires"):

545

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

546

+ self.timeout)

547

else:

548

self.last_enabled = None

549

self.expires = None

550

304

if config is None:

305

config = {}

551

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

552

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# Uppercase and remove spaces from fingerprint for later

553

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# comparison purposes with return value from the fingerprint()

554

309

# function

310

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

311

.replace(" ", ""))

555

312

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

556

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

557

datetime.datetime.utcnow())

558

559

# attributes specific for this server instance

313

if "secret" in config:

314

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

315

elif "secfile" in config:

316

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

317

(config["secfile"])),

318

"rb") as secfile:

319

self.secret = secfile.read()

320

else:

321

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

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

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self.checker = None

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333

self.checker_initiator_tag = None

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self.disable_initiator_tag = None

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335

self.checker_callback_tag = None

336

self.checker_command = config["checker"]

564

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self.current_checker_command = None

565

self.approved = None

338

self.last_connect = None

339

self._approved = None

340

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

341

True)

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self.approvals_pending = 0

567

self.changedstate = (multiprocessing_manager

568

.Condition(multiprocessing_manager

569

.Lock()))

570

self.client_structure = [attr for attr in

571

self.__dict__.iterkeys()

572

if not attr.startswith("_")]

573

self.client_structure.append("client_structure")

574

575

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

576

lambda obj:

577

isinstance(obj,

578

property)):

579

if not name.startswith("_"):

580

self.client_structure.append(name)

343

self.approval_delay = string_to_delta(

344

config["approval_delay"])

345

self.approval_duration = string_to_delta(

346

config["approval_duration"])

347

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

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348

582

# Send notice to process children that client state has changed

583

349

def send_changedstate(self):

584

with self.changedstate:

585

self.changedstate.notify_all()

586

350

self.changedstate.acquire()

351

self.changedstate.notify_all()

352

self.changedstate.release()

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354

def enable(self):

588

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

589

356

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

590

357

# Already enabled

591

358

return

592

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

593

self.enabled = True

359

self.send_changedstate()

594

360

self.last_enabled = datetime.datetime.utcnow()

595

self.init_checker()

596

self.send_changedstate()

597

598

def disable(self, quiet=True):

599

"""Disable this client."""

600

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

601

return False

602

if not quiet:

603

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

604

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

605

gobject.source_remove(self.disable_initiator_tag)

606

self.disable_initiator_tag = None

607

self.expires = None

608

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

609

gobject.source_remove(self.checker_initiator_tag)

610

self.checker_initiator_tag = None

611

self.stop_checker()

612

self.enabled = False

613

if not quiet:

614

self.send_changedstate()

615

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

616

return False

617

618

def __del__(self):

619

self.disable()

620

621

def init_checker(self):

622

361

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

623

362

# and every interval from then on.

624

if self.checker_initiator_tag is not None:

625

gobject.source_remove(self.checker_initiator_tag)

626

363

self.checker_initiator_tag = (gobject.timeout_add

627

364

(self.interval_milliseconds(),

628

365

self.start_checker))

629

366

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

630

if self.disable_initiator_tag is not None:

631

gobject.source_remove(self.disable_initiator_tag)

632

367

self.disable_initiator_tag = (gobject.timeout_add

633

368

(self.timeout_milliseconds(),

634

369

self.disable))

370

self.enabled = True

635

371

# Also start a new checker *right now*.

636

372

self.start_checker()

637

373

374

def disable(self, quiet=True):

375

"""Disable this client."""

376

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

377

return False

378

if not quiet:

379

self.send_changedstate()

380

if not quiet:

381

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

382

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

383

gobject.source_remove(self.disable_initiator_tag)

384

self.disable_initiator_tag = None

385

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

386

gobject.source_remove(self.checker_initiator_tag)

387

self.checker_initiator_tag = None

388

self.stop_checker()

389

if self.disable_hook:

390

self.disable_hook(self)

391

self.enabled = False

392

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

393

return False

394

395

def __del__(self):

396

self.disable_hook = None

397

self.disable()

398

638

399

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

639

400

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

640

401

self.checker_callback_tag = None

641

402

self.checker = None

642

403

if os.WIFEXITED(condition):

643

self.last_checker_status = os.WEXITSTATUS(condition)

644

if self.last_checker_status == 0:

404

exitstatus = os.WEXITSTATUS(condition)

405

if exitstatus == 0:

645

406

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

646

407

vars(self))

647

408

self.checked_ok()

649

410

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

650

411

vars(self))

651

412

else:

652

self.last_checker_status = -1

653

413

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

654

414

vars(self))

655

415

656

416

def checked_ok(self):

657

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

417

"""Bump up the timeout for this client.

418

419

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

420

alive and well.

421

"""

658

422

self.last_checked_ok = datetime.datetime.utcnow()

659

self.last_checker_status = 0

660

self.bump_timeout()

661

662

def bump_timeout(self, timeout=None):

663

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

664

if timeout is None:

665

timeout = self.timeout

666

if self.disable_initiator_tag is not None:

667

gobject.source_remove(self.disable_initiator_tag)

668

self.disable_initiator_tag = None

669

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

670

self.disable_initiator_tag = (gobject.timeout_add

671

(timedelta_to_milliseconds

672

(timeout), self.disable))

673

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

423

gobject.source_remove(self.disable_initiator_tag)

424

self.disable_initiator_tag = (gobject.timeout_add

425

(self.timeout_milliseconds(),

426

self.disable))

674

427

675

428

def need_approval(self):

676

429

self.last_approval_request = datetime.datetime.utcnow()

681

434

If a checker already exists, leave it running and do

682

435

nothing."""

683

436

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

684

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

685

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

686

# would inevitably timeout, since no checker would get a

687

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

437

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

438

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

439

# client would inevitably timeout, since no checker would get

440

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

688

441

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

689

442

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

690

443

# should be.

692

445

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

693

446

try:

694

447

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

695

except AttributeError:

696

pass

697

except OSError as error:

698

if error.errno != errno.ECHILD:

699

raise

448

except (AttributeError, OSError), error:

449

if (isinstance(error, OSError)

450

and error.errno != errno.ECHILD):

451

raise error

700

452

else:

701

453

if pid:

702

454

logger.warning("Checker was a zombie")

705

457

self.current_checker_command)

706

458

# Start a new checker if needed

707

459

if self.checker is None:

708

# Escape attributes for the shell

709

escaped_attrs = dict(

710

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

711

for attr in

712

self.runtime_expansions)

713

460

try:

714

command = self.checker_command % escaped_attrs

715

except TypeError as error:

716

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

717

self.checker_command, exc_info=error)

718

return True # Try again later

461

# In case checker_command has exactly one % operator

462

command = self.checker_command % self.host

463

except TypeError:

464

# Escape attributes for the shell

465

escaped_attrs = dict(

466

(attr,

467

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

468

errors=

469

'replace')))

470

for attr in

471

self.runtime_expansions)

472

473

try:

474

command = self.checker_command % escaped_attrs

475

except TypeError, error:

476

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

477

' %s', self.checker_command, error)

478

return True # Try again later

719

479

self.current_checker_command = command

720

480

try:

721

481

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

724

484

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

725

485

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

726

486

# always replaced by /dev/null.)

727

# The exception is when not debugging but nevertheless

728

# running in the foreground; use the previously

729

# created wnull.

730

popen_args = {}

731

if (not self.server_settings["debug"]

732

and self.server_settings["foreground"]):

733

popen_args.update({"stdout": wnull,

734

"stderr": wnull })

735

487

self.checker = subprocess.Popen(command,

736

488

close_fds=True,

737

shell=True, cwd="/",

738

**popen_args)

739

except OSError as error:

740

logger.error("Failed to start subprocess",

741

exc_info=error)

742

return True

743

self.checker_callback_tag = (gobject.child_watch_add

744

(self.checker.pid,

745

self.checker_callback,

746

data=command))

747

# The checker may have completed before the gobject

748

# watch was added. Check for this.

749

try:

489

shell=True, cwd="/")

490

self.checker_callback_tag = (gobject.child_watch_add

491

(self.checker.pid,

492

self.checker_callback,

493

data=command))

494

# The checker may have completed before the gobject

495

# watch was added. Check for this.

750

496

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

751

except OSError as error:

752

if error.errno == errno.ECHILD:

753

# This should never happen

754

logger.error("Child process vanished",

755

exc_info=error)

756

return True

757

raise

758

if pid:

759

gobject.source_remove(self.checker_callback_tag)

760

self.checker_callback(pid, status, command)

497

if pid:

498

gobject.source_remove(self.checker_callback_tag)

499

self.checker_callback(pid, status, command)

500

except OSError, error:

501

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

502

error)

761

503

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

762

504

return True

763

505

770

512

return

771

513

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

772

514

try:

773

self.checker.terminate()

515

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

774

516

#time.sleep(0.5)

775

517

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

776

# self.checker.kill()

777

except OSError as error:

518

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

519

except OSError, error:

778

520

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

779

521

raise

780

522

self.checker = None

781

523

782

783

524

def dbus_service_property(dbus_interface, signature="v",

784

525

access="readwrite", byte_arrays=False):

785

526

"""Decorators for marking methods of a DBusObjectWithProperties to

796

537

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

797

538

if byte_arrays and signature != "ay":

798

539

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

799

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

540

" signature %r" % signature)

800

541

def decorator(func):

801

542

func._dbus_is_property = True

802

543

func._dbus_interface = dbus_interface

810

551

return decorator

811

552

812

553

813

def dbus_interface_annotations(dbus_interface):

814

"""Decorator for marking functions returning interface annotations

815

816

Usage:

817

818

@dbus_interface_annotations("org.example.Interface")

819

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

820

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

821

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

822

"false"}

823

"""

824

def decorator(func):

825

func._dbus_is_interface = True

826

func._dbus_interface = dbus_interface

827

func._dbus_name = dbus_interface

828

return func

829

return decorator

830

831

832

def dbus_annotations(annotations):

833

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

834

Usage:

835

836

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

837

access="r")

838

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

839

"org.freedesktop.DBus.Property."

840

"EmitsChangedSignal": "false"})

841

def Property_dbus_property(self):

842

return dbus.Boolean(False)

843

"""

844

def decorator(func):

845

func._dbus_annotations = annotations

846

return func

847

return decorator

848

849

850

554

class DBusPropertyException(dbus.exceptions.DBusException):

851

555

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

852

556

"""

868

572

869

573

class DBusObjectWithProperties(dbus.service.Object):

870

574

"""A D-Bus object with properties.

871

575

872

576

Classes inheriting from this can use the dbus_service_property

873

577

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

874

578

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

875

579

"""

876

580

877

581

@staticmethod

878

def _is_dbus_thing(thing):

879

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

880

881

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

882

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

883

"""

884

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

885

False)

582

def _is_dbus_property(obj):

583

return getattr(obj, "_dbus_is_property", False)

886

584

887

def _get_all_dbus_things(self, thing):

585

def _get_all_dbus_properties(self):

888

586

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

889

587

"""

890

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

891

name),

892

athing.__get__(self))

893

for cls in self.__class__.__mro__

894

for name, athing in

895

inspect.getmembers(cls,

896

self._is_dbus_thing(thing)))

588

return ((prop._dbus_name, prop)

589

for name, prop in

590

inspect.getmembers(self, self._is_dbus_property))

897

591

898

592

def _get_dbus_property(self, interface_name, property_name):

899

593

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

900

594

property with the specified name and interface.

901

595

"""

902

for cls in self.__class__.__mro__:

903

for name, value in (inspect.getmembers

904

(cls,

905

self._is_dbus_thing("property"))):

906

if (value._dbus_name == property_name

907

and value._dbus_interface == interface_name):

908

return value.__get__(self)

909

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

910

606

# No such property

911

607

raise DBusPropertyNotFound(self.dbus_object_path + ":"

912

608

+ interface_name + "."

936

632

# The byte_arrays option is not supported yet on

937

633

# signatures other than "ay".

938

634

if prop._dbus_signature != "ay":

939

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

940

"'ay' signature {0!r}"

941

.format(prop._dbus_signature))

942

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

943

for byte in value))

635

raise ValueError

636

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

637

for byte in value))

944

638

prop(value)

945

639

946

640

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

948

642

def GetAll(self, interface_name):

949

643

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

950

644

standard.

951

645

952

646

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

953

647

"""

954

properties = {}

955

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

648

all = {}

649

for name, prop in self._get_all_dbus_properties():

956

650

if (interface_name

957

651

and interface_name != prop._dbus_interface):

958

652

# Interface non-empty but did not match

962

656

continue

963

657

value = prop()

964

658

if not hasattr(value, "variant_level"):

965

properties[name] = value

659

all[name] = value

966

660

continue

967

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

968

value.variant_level+1)

969

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

661

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

662

value.variant_level+1)

663

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

970

664

971

665

@dbus.service.method(dbus.INTROSPECTABLE_IFACE,

972

666

out_signature="s",

973

667

path_keyword='object_path',

974

668

connection_keyword='connection')

975

669

def Introspect(self, object_path, connection):

976

"""Overloading of standard D-Bus method.

977

978

Inserts property tags and interface annotation tags.

670

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

979

671

"""

980

672

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

981

673

connection)

988

680

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

989

681

return e

990

682

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

991

# Add property tags

992

683

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

993

684

for name, prop

994

in self._get_all_dbus_things("property")

685

in self._get_all_dbus_properties()

995

686

if prop._dbus_interface

996

687

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

997

688

if_tag.appendChild(tag)

998

# Add annotation tags

999

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

1000

for tag in if_tag.getElementsByTagName(typ):

1001

annots = dict()

1002

for name, prop in (self.

1003

_get_all_dbus_things(typ)):

1004

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

1005

and prop._dbus_interface

1006

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

1007

annots.update(getattr

1008

(prop,

1009

"_dbus_annotations",

1010

{}))

1011

for name, value in annots.iteritems():

1012

ann_tag = document.createElement(

1013

"annotation")

1014

ann_tag.setAttribute("name", name)

1015

ann_tag.setAttribute("value", value)

1016

tag.appendChild(ann_tag)

1017

# Add interface annotation tags

1018

for annotation, value in dict(

1019

itertools.chain.from_iterable(

1020

annotations().iteritems()

1021

for name, annotations in

1022

self._get_all_dbus_things("interface")

1023

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

1024

)).iteritems():

1025

ann_tag = document.createElement("annotation")

1026

ann_tag.setAttribute("name", annotation)

1027

ann_tag.setAttribute("value", value)

1028

if_tag.appendChild(ann_tag)

1029

689

# Add the names to the return values for the

1030

690

# "org.freedesktop.DBus.Properties" methods

1031

691

if (if_tag.getAttribute("name")

1044

704

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

1045

705

document.unlink()

1046

706

except (AttributeError, xml.dom.DOMException,

1047

xml.parsers.expat.ExpatError) as error:

707

xml.parsers.expat.ExpatError), error:

1048

708

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

1049

exc_info=error)

709

error)

1050

710

return xmlstring

1051

711

1052

712

1053

def datetime_to_dbus(dt, variant_level=0):

1054

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

1055

if dt is None:

1056

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

1057

return dbus.String(dt.isoformat(),

1058

variant_level=variant_level)

1059

1060

1061

def alternate_dbus_interfaces(alt_interface_names, deprecate=True):

1062

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

1063

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

1064

interface names according to the "alt_interface_names" mapping.

1065

Usage:

1066

1067

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

1068

"net.example.AlternateInterface"})

1069

class SampleDBusObject(dbus.service.Object):

1070

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

1071

def SampleDBusMethod():

1072

pass

1073

1074

The above "SampleDBusMethod" on "SampleDBusObject" will be

1075

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

1076

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

1077

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

1078

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

1079

1080

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

1081

(from DBusObjectWithProperties) and interfaces (from the

1082

dbus_interface_annotations decorator).

1083

"""

1084

def wrapper(cls):

1085

for orig_interface_name, alt_interface_name in (

1086

alt_interface_names.iteritems()):

1087

attr = {}

1088

interface_names = set()

1089

# Go though all attributes of the class

1090

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

1091

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

1092

# with the wrong interface name

1093

if (not hasattr(attribute, "_dbus_interface")

1094

or not attribute._dbus_interface

1095

.startswith(orig_interface_name)):

1096

continue

1097

# Create an alternate D-Bus interface name based on

1098

# the current name

1099

alt_interface = (attribute._dbus_interface

1100

.replace(orig_interface_name,

1101

alt_interface_name))

1102

interface_names.add(alt_interface)

1103

# Is this a D-Bus signal?

1104

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

1105

# Extract the original non-method undecorated

1106

# function by black magic

1107

nonmethod_func = (dict(

1108

zip(attribute.func_code.co_freevars,

1109

attribute.__closure__))["func"]

1110

.cell_contents)

1111

# Create a new, but exactly alike, function

1112

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

1113

# with the alternate D-Bus interface name

1114

new_function = (dbus.service.signal

1115

(alt_interface,

1116

attribute._dbus_signature)

1117

(types.FunctionType(

1118

nonmethod_func.func_code,

1119

nonmethod_func.func_globals,

1120

nonmethod_func.func_name,

1121

nonmethod_func.func_defaults,

1122

nonmethod_func.func_closure)))

1123

# Copy annotations, if any

1124

try:

1125

new_function._dbus_annotations = (

1126

dict(attribute._dbus_annotations))

1127

except AttributeError:

1128

pass

1129

# Define a creator of a function to call both the

1130

# original and alternate functions, so both the

1131

# original and alternate signals gets sent when

1132

# the function is called

1133

def fixscope(func1, func2):

1134

"""This function is a scope container to pass

1135

func1 and func2 to the "call_both" function

1136

outside of its arguments"""

1137

def call_both(*args, **kwargs):

1138

"""This function will emit two D-Bus

1139

signals by calling func1 and func2"""

1140

func1(*args, **kwargs)

1141

func2(*args, **kwargs)

1142

return call_both

1143

# Create the "call_both" function and add it to

1144

# the class

1145

attr[attrname] = fixscope(attribute, new_function)

1146

# Is this a D-Bus method?

1147

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

1148

# Create a new, but exactly alike, function

1149

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

1150

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

1151

# to the class.

1152

attr[attrname] = (dbus.service.method

1153

(alt_interface,

1154

attribute._dbus_in_signature,

1155

attribute._dbus_out_signature)

1156

(types.FunctionType

1157

(attribute.func_code,

1158

attribute.func_globals,

1159

attribute.func_name,

1160

attribute.func_defaults,

1161

attribute.func_closure)))

1162

# Copy annotations, if any

1163

try:

1164

attr[attrname]._dbus_annotations = (

1165

dict(attribute._dbus_annotations))

1166

except AttributeError:

1167

pass

1168

# Is this a D-Bus property?

1169

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

1170

# Create a new, but exactly alike, function

1171

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

1172

# property with the alternate D-Bus interface

1173

# name. Add it to the class.

1174

attr[attrname] = (dbus_service_property

1175

(alt_interface,

1176

attribute._dbus_signature,

1177

attribute._dbus_access,

1178

attribute

1179

._dbus_get_args_options

1180

["byte_arrays"])

1181

(types.FunctionType

1182

(attribute.func_code,

1183

attribute.func_globals,

1184

attribute.func_name,

1185

attribute.func_defaults,

1186

attribute.func_closure)))

1187

# Copy annotations, if any

1188

try:

1189

attr[attrname]._dbus_annotations = (

1190

dict(attribute._dbus_annotations))

1191

except AttributeError:

1192

pass

1193

# Is this a D-Bus interface?

1194

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

1195

# Create a new, but exactly alike, function

1196

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

1197

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

1198

# to the class.

1199

attr[attrname] = (dbus_interface_annotations

1200

(alt_interface)

1201

(types.FunctionType

1202

(attribute.func_code,

1203

attribute.func_globals,

1204

attribute.func_name,

1205

attribute.func_defaults,

1206

attribute.func_closure)))

1207

if deprecate:

1208

# Deprecate all alternate interfaces

1209

iname="_AlternateDBusNames_interface_annotation{0}"

1210

for interface_name in interface_names:

1211

@dbus_interface_annotations(interface_name)

1212

def func(self):

1213

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

1214

"true" }

1215

# Find an unused name

1216

for aname in (iname.format(i)

1217

for i in itertools.count()):

1218

if aname not in attr:

1219

attr[aname] = func

1220

break

1221

if interface_names:

1222

# Replace the class with a new subclass of it with

1223

# methods, signals, etc. as created above.

1224

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

1225

(cls,), attr)

1226

return cls

1227

return wrapper

1228

1229

1230

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

1231

"se.bsnet.fukt.Mandos"})

1232

713

class ClientDBus(Client, DBusObjectWithProperties):

1233

714

"""A Client class using D-Bus

1234

715

1243

724

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

1244

725

1245

726

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

727

self._approvals_pending = 0

1246

728

self.bus = bus

1247

729

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

1248

730

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

1254

736

("/clients/" + client_object_name))

1255

737

DBusObjectWithProperties.__init__(self, self.bus,

1256

738

self.dbus_object_path)

1257

1258

def notifychangeproperty(transform_func,

1259

dbus_name, type_func=lambda x: x,

1260

variant_level=1):

1261

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

1262

its changes to DBus.

1263

1264

transform_fun: Function that takes a value and a variant_level

1265

and transforms it to a D-Bus type.

1266

dbus_name: D-Bus name of the variable

1267

type_func: Function that transform the value before sending it

1268

to the D-Bus. Default: no transform

1269

variant_level: D-Bus variant level. Default: 1

1270

"""

1271

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

1272

def setter(self, value):

1273

if hasattr(self, "dbus_object_path"):

1274

if (not hasattr(self, attrname) or

1275

type_func(getattr(self, attrname, None))

1276

!= type_func(value)):

1277

dbus_value = transform_func(type_func(value),

1278

variant_level

1279

=variant_level)

1280

self.PropertyChanged(dbus.String(dbus_name),

1281

dbus_value)

1282

setattr(self, attrname, value)

1283

1284

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

1285

1286

expires = notifychangeproperty(datetime_to_dbus, "Expires")

1287

approvals_pending = notifychangeproperty(dbus.Boolean,

1288

"ApprovalPending",

1289

type_func = bool)

1290

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

1291

last_enabled = notifychangeproperty(datetime_to_dbus,

1292

"LastEnabled")

1293

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

1294

type_func = lambda checker:

1295

checker is not None)

1296

last_checked_ok = notifychangeproperty(datetime_to_dbus,

1297

"LastCheckedOK")

1298

last_checker_status = notifychangeproperty(dbus.Int16,

1299

"LastCheckerStatus")

1300

last_approval_request = notifychangeproperty(

1301

datetime_to_dbus, "LastApprovalRequest")

1302

approved_by_default = notifychangeproperty(dbus.Boolean,

1303

"ApprovedByDefault")

1304

approval_delay = notifychangeproperty(dbus.UInt64,

1305

"ApprovalDelay",

1306

type_func =

1307

timedelta_to_milliseconds)

1308

approval_duration = notifychangeproperty(

1309

dbus.UInt64, "ApprovalDuration",

1310

type_func = timedelta_to_milliseconds)

1311

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

1312

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

1313

type_func =

1314

timedelta_to_milliseconds)

1315

extended_timeout = notifychangeproperty(

1316

dbus.UInt64, "ExtendedTimeout",

1317

type_func = timedelta_to_milliseconds)

1318

interval = notifychangeproperty(dbus.UInt64,

1319

"Interval",

1320

type_func =

1321

timedelta_to_milliseconds)

1322

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

1323

1324

del notifychangeproperty

739

740

def _get_approvals_pending(self):

741

return self._approvals_pending

742

def _set_approvals_pending(self, value):

743

old_value = self._approvals_pending

744

self._approvals_pending = value

745

bval = bool(value)

746

if (hasattr(self, "dbus_object_path")

747

and bval is not bool(old_value)):

748

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

749

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

750

dbus_bool)

751

752

approvals_pending = property(_get_approvals_pending,

753

_set_approvals_pending)

754

del _get_approvals_pending, _set_approvals_pending

755

756

@staticmethod

757

def _datetime_to_dbus(dt, variant_level=0):

758

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

759

return dbus.String(dt.isoformat(),

760

variant_level=variant_level)

761

762

def enable(self):

763

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

764

r = Client.enable(self)

765

if oldstate != self.enabled:

766

# Emit D-Bus signals

767

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

768

dbus.Boolean(True, variant_level=1))

769

self.PropertyChanged(

770

dbus.String("LastEnabled"),

771

self._datetime_to_dbus(self.last_enabled,

772

variant_level=1))

773

return r

774

775

def disable(self, quiet = False):

776

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

777

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

778

if not quiet and oldstate != self.enabled:

779

# Emit D-Bus signal

780

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

781

dbus.Boolean(False, variant_level=1))

782

return r

1325

783

1326

784

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

1327

785

try:

1336

794

*args, **kwargs):

1337

795

self.checker_callback_tag = None

1338

796

self.checker = None

797

# Emit D-Bus signal

798

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

799

dbus.Boolean(False, variant_level=1))

1339

800

if os.WIFEXITED(condition):

1340

801

exitstatus = os.WEXITSTATUS(condition)

1341

802

# Emit D-Bus signal

1351

812

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

1352

813

*args, **kwargs)

1353

814

815

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

816

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

817

# Emit D-Bus signal

818

self.PropertyChanged(

819

dbus.String("LastCheckedOK"),

820

(self._datetime_to_dbus(self.last_checked_ok,

821

variant_level=1)))

822

return r

823

824

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

825

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

826

# Emit D-Bus signal

827

self.PropertyChanged(

828

dbus.String("LastApprovalRequest"),

829

(self._datetime_to_dbus(self.last_approval_request,

830

variant_level=1)))

831

return r

832

1354

833

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

1355

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

834

old_checker = self.checker

835

if self.checker is not None:

836

old_checker_pid = self.checker.pid

837

else:

838

old_checker_pid = None

1356

839

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

1357

840

# Only if new checker process was started

1358

841

if (self.checker is not None

1359

842

and old_checker_pid != self.checker.pid):

1360

843

# Emit D-Bus signal

1361

844

self.CheckerStarted(self.current_checker_command)

845

self.PropertyChanged(

846

dbus.String("CheckerRunning"),

847

dbus.Boolean(True, variant_level=1))

1362

848

return r

1363

849

850

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

851

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

852

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

853

if (old_checker is not None

854

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

855

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

856

dbus.Boolean(False, variant_level=1))

857

return r

858

1364

859

def _reset_approved(self):

1365

self.approved = None

860

self._approved = None

1366

861

return False

1367

862

1368

863

def approve(self, value=True):

1369

self.approved = value

1370

gobject.timeout_add(timedelta_to_milliseconds

864

self.send_changedstate()

865

self._approved = value

866

gobject.timeout_add(self._timedelta_to_milliseconds

1371

867

(self.approval_duration),

1372

868

self._reset_approved)

1373

self.send_changedstate()

869

1374

870

1375

871

## D-Bus methods, signals & properties

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"}

872

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

1384

873

1385

874

## Signals

1386

875

1433

922

# CheckedOK - method

1434

923

@dbus.service.method(_interface)

1435

924

def CheckedOK(self):

1436

self.checked_ok()

925

return self.checked_ok()

1437

926

1438

927

# Enable - method

1439

928

@dbus.service.method(_interface)

1472

961

if value is None: # get

1473

962

return dbus.Boolean(self.approved_by_default)

1474

963

self.approved_by_default = bool(value)

964

# Emit D-Bus signal

965

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

966

dbus.Boolean(value, variant_level=1))

1475

967

1476

968

# ApprovalDelay - property

1477

969

@dbus_service_property(_interface, signature="t",

1480

972

if value is None: # get

1481

973

return dbus.UInt64(self.approval_delay_milliseconds())

1482

974

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

975

# Emit D-Bus signal

976

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

977

dbus.UInt64(value, variant_level=1))

1483

978

1484

979

# ApprovalDuration - property

1485

980

@dbus_service_property(_interface, signature="t",

1486

981

access="readwrite")

1487

982

def ApprovalDuration_dbus_property(self, value=None):

1488

983

if value is None: # get

1489

return dbus.UInt64(timedelta_to_milliseconds(

984

return dbus.UInt64(self._timedelta_to_milliseconds(

1490

985

self.approval_duration))

1491

986

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

987

# Emit D-Bus signal

988

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

989

dbus.UInt64(value, variant_level=1))

1492

990

1493

991

# Name - property

1494

992

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

1506

1004

def Host_dbus_property(self, value=None):

1507

1005

if value is None: # get

1508

1006

return dbus.String(self.host)

1509

self.host = unicode(value)

1007

self.host = value

1008

# Emit D-Bus signal

1009

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

1010

dbus.String(value, variant_level=1))

1510

1011

1511

1012

# Created - property

1512

1013

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

1513

1014

def Created_dbus_property(self):

1514

return datetime_to_dbus(self.created)

1015

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

1515

1016

1516

1017

# LastEnabled - property

1517

1018

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

1518

1019

def LastEnabled_dbus_property(self):

1519

return datetime_to_dbus(self.last_enabled)

1020

if self.last_enabled is None:

1021

return dbus.String("")

1022

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

1520

1023

1521

1024

# Enabled - property

1522

1025

@dbus_service_property(_interface, signature="b",

1536

1039

if value is not None:

1537

1040

self.checked_ok()

1538

1041

return

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)

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))

1551

1046

1552

1047

# LastApprovalRequest - property

1553

1048

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

1554

1049

def LastApprovalRequest_dbus_property(self):

1555

return datetime_to_dbus(self.last_approval_request)

1050

if self.last_approval_request is None:

1051

return dbus.String("")

1052

return dbus.String(self.

1053

_datetime_to_dbus(self

1054

.last_approval_request))

1556

1055

1557

1056

# Timeout - property

1558

1057

@dbus_service_property(_interface, signature="t",

1560

1059

def Timeout_dbus_property(self, value=None):

1561

1060

if value is None: # get

1562

1061

return dbus.UInt64(self.timeout_milliseconds())

1563

old_timeout = self.timeout

1564

1062

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

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)

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))

1589

1083

1590

1084

# Interval - property

1591

1085

@dbus_service_property(_interface, signature="t",

1594

1088

if value is None: # get

1595

1089

return dbus.UInt64(self.interval_milliseconds())

1596

1090

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

1091

# Emit D-Bus signal

1092

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

1093

dbus.UInt64(value, variant_level=1))

1597

1094

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

1598

1095

return

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

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

1606

1102

# Checker - property

1607

1103

@dbus_service_property(_interface, signature="s",

1608

1104

access="readwrite")

1609

1105

def Checker_dbus_property(self, value=None):

1610

1106

if value is None: # get

1611

1107

return dbus.String(self.checker_command)

1612

self.checker_command = unicode(value)

1108

self.checker_command = value

1109

# Emit D-Bus signal

1110

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

1111

dbus.String(self.checker_command,

1112

variant_level=1))

1613

1113

1614

1114

# CheckerRunning - property

1615

1115

@dbus_service_property(_interface, signature="b",

1642

1142

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

1643

1143

if not self._pipe.recv():

1644

1144

raise KeyError()

1645

1145

1646

1146

def __getattribute__(self, name):

1647

if name == '_pipe':

1147

if(name == '_pipe'):

1648

1148

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

1649

1149

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

1650

1150

data = self._pipe.recv()

1655

1155

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

1656

1156

return self._pipe.recv()[1]

1657

1157

return func

1658

1158

1659

1159

def __setattr__(self, name, value):

1660

if name == '_pipe':

1160

if(name == '_pipe'):

1661

1161

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

1662

1162

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

1663

1163

1674

1174

unicode(self.client_address))

1675

1175

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

1676

1176

self.server.child_pipe.fileno())

1677

1177

1678

1178

session = (gnutls.connection

1679

1179

.ClientSession(self.request,

1680

1180

gnutls.connection

1681

1181

.X509Credentials()))

1682

1182

1683

1183

# Note: gnutls.connection.X509Credentials is really a

1684

1184

# generic GnuTLS certificate credentials object so long as

1685

1185

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

1686

1186

# here despite using OpenPGP certificates.

1687

1187

1688

1188

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

1689

1189

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

1690

1190

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

1696

1196

(gnutls.library.functions

1697

1197

.gnutls_priority_set_direct(session._c_object,

1698

1198

priority, None))

1699

1199

1700

1200

# Start communication using the Mandos protocol

1701

1201

# Get protocol number

1702

1202

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

1703

1203

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

1704

1204

try:

1705

1205

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

1706

raise RuntimeError(line)

1707

except (ValueError, IndexError, RuntimeError) as error:

1206

raise RuntimeError

1207

except (ValueError, IndexError, RuntimeError), error:

1708

1208

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

1709

1209

return

1710

1210

1711

1211

# Start GnuTLS connection

1712

1212

try:

1713

1213

session.handshake()

1714

except gnutls.errors.GNUTLSError as error:

1214

except gnutls.errors.GNUTLSError, error:

1715

1215

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

1716

1216

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

1717

1217

# established. Just abandon the request.

1718

1218

return

1719

1219

logger.debug("Handshake succeeded")

1720

1220

1721

1221

approval_required = False

1722

1222

try:

1723

1223

try:

1724

1224

fpr = self.fingerprint(self.peer_certificate

1725

1225

(session))

1726

except (TypeError,

1727

gnutls.errors.GNUTLSError) as error:

1226

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

1728

1227

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

1729

1228

return

1730

1229

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

1731

1230

1732

1231

try:

1733

1232

client = ProxyClient(child_pipe, fpr,

1734

1233

self.client_address)

1742

1241

1743

1242

while True:

1744

1243

if not client.enabled:

1745

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

1244

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

1746

1245

client.name)

1747

1246

if self.server.use_dbus:

1748

1247

# Emit D-Bus signal

1749

client.Rejected("Disabled")

1248

client.Rejected("Disabled")

1750

1249

return

1751

1250

1752

if client.approved or not client.approval_delay:

1251

if client._approved or not client.approval_delay:

1753

1252

#We are approved or approval is disabled

1754

1253

break

1755

elif client.approved is None:

1254

elif client._approved is None:

1756

1255

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

1757

1256

client.name)

1758

1257

if self.server.use_dbus:

1769

1268

return

1770

1269

1771

1270

#wait until timeout or approved

1271

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

1772

1272

time = datetime.datetime.now()

1773

1273

client.changedstate.acquire()

1774

client.changedstate.wait(

1775

float(timedelta_to_milliseconds(delay)

1776

/ 1000))

1274

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

1777

1275

client.changedstate.release()

1778

1276

time2 = datetime.datetime.now()

1779

1277

if (time2 - time) >= delay:

1794

1292

while sent_size < len(client.secret):

1795

1293

try:

1796

1294

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

1797

except gnutls.errors.GNUTLSError as error:

1798

logger.warning("gnutls send failed",

1799

exc_info=error)

1295

except (gnutls.errors.GNUTLSError), error:

1296

logger.warning("gnutls send failed")

1800

1297

return

1801

1298

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

1802

1299

sent, len(client.secret)

1803

1300

- (sent_size + sent))

1804

1301

sent_size += sent

1805

1302

1806

1303

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

1807

# bump the timeout using extended_timeout

1808

client.bump_timeout(client.extended_timeout)

1304

# bump the timeout as if seen

1305

client.checked_ok()

1809

1306

if self.server.use_dbus:

1810

1307

# Emit D-Bus signal

1811

1308

client.GotSecret()

1815

1312

client.approvals_pending -= 1

1816

1313

try:

1817

1314

session.bye()

1818

except gnutls.errors.GNUTLSError as error:

1819

logger.warning("GnuTLS bye failed",

1820

exc_info=error)

1315

except (gnutls.errors.GNUTLSError), error:

1316

logger.warning("GnuTLS bye failed")

1821

1317

1822

1318

@staticmethod

1823

1319

def peer_certificate(session):

1879

1375

# Convert the buffer to a Python bytestring

1880

1376

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

1881

1377

# Convert the bytestring to hexadecimal notation

1882

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

1378

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

1883

1379

return hex_fpr

1884

1380

1885

1381

1888

1384

def sub_process_main(self, request, address):

1889

1385

try:

1890

1386

self.finish_request(request, address)

1891

except Exception:

1387

except:

1892

1388

self.handle_error(request, address)

1893

1389

self.close_request(request)

1894

1390

1895

1391

def process_request(self, request, address):

1896

1392

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

1897

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

1898

args = (request, address))

1899

proc.start()

1900

return proc

1901

1393

multiprocessing.Process(target = self.sub_process_main,

1394

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

1902

1395

1903

1396

class MultiprocessingMixInWithPipe(MultiprocessingMixIn, object):

1904

1397

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

1908

1401

This function creates a new pipe in self.pipe

1909

1402

"""

1910

1403

parent_pipe, self.child_pipe = multiprocessing.Pipe()

1911

1912

proc = MultiprocessingMixIn.process_request(self, request,

1913

client_address)

1404

1405

super(MultiprocessingMixInWithPipe,

1406

self).process_request(request, client_address)

1914

1407

self.child_pipe.close()

1915

self.add_pipe(parent_pipe, proc)

1916

1917

def add_pipe(self, parent_pipe, proc):

1408

self.add_pipe(parent_pipe)

1409

1410

def add_pipe(self, parent_pipe):

1918

1411

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

1919

raise NotImplementedError()

1920

1412

raise NotImplementedError

1921

1413

1922

1414

class IPv6_TCPServer(MultiprocessingMixInWithPipe,

1923

1415

socketserver.TCPServer, object):

1929

1421

use_ipv6: Boolean; to use IPv6 or not

1930

1422

"""

1931

1423

def __init__(self, server_address, RequestHandlerClass,

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

"""

1424

interface=None, use_ipv6=True):

1936

1425

self.interface = interface

1937

1426

if use_ipv6:

1938

1427

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.

1965

1428

socketserver.TCPServer.__init__(self, server_address,

1966

1429

RequestHandlerClass)

1967

1968

1430

def server_bind(self):

1969

1431

"""This overrides the normal server_bind() function

1970

1432

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

1978

1440

try:

1979

1441

self.socket.setsockopt(socket.SOL_SOCKET,

1980

1442

SO_BINDTODEVICE,

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:

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:

1987

1451

logger.error("SO_BINDTODEVICE not available;"

1988

1452

" cannot bind to interface %s",

1989

1453

self.interface)

1990

elif error.errno == errno.ENODEV:

1991

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

1992

" cannot bind", self.interface)

1993

1454

else:

1994

1455

raise

1995

1456

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

1998

1459

if self.address_family == socket.AF_INET6:

1999

1460

any_address = "::" # in6addr_any

2000

1461

else:

2001

any_address = "0.0.0.0" # INADDR_ANY

1462

any_address = socket.INADDR_ANY

2002

1463

self.server_address = (any_address,

2003

1464

self.server_address[1])

2004

1465

elif not self.server_address[1]:

2025

1486

"""

2026

1487

def __init__(self, server_address, RequestHandlerClass,

2027

1488

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

2028

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

1489

gnutls_priority=None, use_dbus=True):

2029

1490

self.enabled = False

2030

1491

self.clients = clients

2031

1492

if self.clients is None:

2032

self.clients = {}

1493

self.clients = set()

2033

1494

self.use_dbus = use_dbus

2034

1495

self.gnutls_priority = gnutls_priority

2035

1496

IPv6_TCPServer.__init__(self, server_address,

2036

1497

RequestHandlerClass,

2037

1498

interface = interface,

2038

use_ipv6 = use_ipv6,

2039

socketfd = socketfd)

1499

use_ipv6 = use_ipv6)

2040

1500

def server_activate(self):

2041

1501

if self.enabled:

2042

1502

return socketserver.TCPServer.server_activate(self)

2043

2044

1503

def enable(self):

2045

1504

self.enabled = True

2046

2047

def add_pipe(self, parent_pipe, proc):

1505

def add_pipe(self, parent_pipe):

2048

1506

# Call "handle_ipc" for both data and EOF events

2049

1507

gobject.io_add_watch(parent_pipe.fileno(),

2050

1508

gobject.IO_IN | gobject.IO_HUP,

2051

1509

functools.partial(self.handle_ipc,

2052

parent_pipe =

2053

parent_pipe,

2054

proc = proc))

2055

1510

parent_pipe = parent_pipe))

1511

2056

1512

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

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()

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):

2062

1530

return False

2063

1531

2064

1532

# Read a request from the child

2069

1537

fpr = request[1]

2070

1538

address = request[2]

2071

1539

2072

for c in self.clients.itervalues():

1540

for c in self.clients:

2073

1541

if c.fingerprint == fpr:

2074

1542

client = c

2075

1543

break

2076

1544

else:

2077

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

2078

"dress: %s", fpr, address)

1545

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

1546

"dress: %s", fpr, address)

2079

1547

if self.use_dbus:

2080

1548

# Emit D-Bus signal

2081

mandos_dbus_service.ClientNotFound(fpr,

2082

address[0])

1549

mandos_dbus_service.ClientNotFound(fpr, address[0])

2083

1550

parent_pipe.send(False)

2084

1551

return False

2085

1552

2086

1553

gobject.io_add_watch(parent_pipe.fileno(),

2087

1554

gobject.IO_IN | gobject.IO_HUP,

2088

1555

functools.partial(self.handle_ipc,

2089

parent_pipe =

2090

parent_pipe,

2091

proc = proc,

2092

client_object =

2093

client))

1556

parent_pipe = parent_pipe,

1557

client_object = client))

2094

1558

parent_pipe.send(True)

2095

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

2096

# same fileno

1559

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

2097

1560

return False

2098

1561

if command == 'funcall':

2099

1562

funcname = request[1]

2100

1563

args = request[2]

2101

1564

kwargs = request[3]

2102

1565

2103

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

2104

funcname)(*args,

2105

**kwargs)))

2106

1566

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

1567

2107

1568

if command == 'getattr':

2108

1569

attrname = request[1]

2109

1570

if callable(client_object.__getattribute__(attrname)):

2110

1571

parent_pipe.send(('function',))

2111

1572

else:

2112

parent_pipe.send(('data', client_object

2113

.__getattribute__(attrname)))

1573

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

2114

1574

2115

1575

if command == 'setattr':

2116

1576

attrname = request[1]

2117

1577

value = request[2]

2118

1578

setattr(client_object, attrname, value)

2119

1579

2120

1580

return True

2121

1581

2122

1582

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

2222

1583

def string_to_delta(interval):

2223

1584

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

2224

1585

2235

1596

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

2236

1597

datetime.timedelta(0, 330)

2237

1598

"""

2238

2239

try:

2240

return rfc3339_duration_to_delta(interval)

2241

except ValueError:

2242

pass

2243

2244

1599

timevalue = datetime.timedelta(0)

2245

1600

for s in interval.split():

2246

1601

try:

2257

1612

elif suffix == "w":

2258

1613

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

2259

1614

else:

2260

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

2261

.format(suffix))

2262

except IndexError as e:

1615

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

1616

except (ValueError, IndexError), e:

2263

1617

raise ValueError(*(e.args))

2264

1618

timevalue += delta

2265

1619

return timevalue

2266

1620

2267

1621

1622

def if_nametoindex(interface):

1623

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

1624

1625

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

1626

global if_nametoindex

1627

try:

1628

if_nametoindex = (ctypes.cdll.LoadLibrary

1629

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

1630

.if_nametoindex)

1631

except (OSError, AttributeError):

1632

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

1633

def if_nametoindex(interface):

1634

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

1635

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

1636

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

1637

ifreq = fcntl.ioctl(s, SIOCGIFINDEX,

1638

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

1639

interface))

1640

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

1641

ifreq[16:20])[0]

1642

return interface_index

1643

return if_nametoindex(interface)

1644

1645

2268

1646

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

2269

1647

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

2270

1648

2278

1656

sys.exit()

2279

1657

if not noclose:

2280

1658

# Close all standard open file descriptors

2281

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

1659

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

2282

1660

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

2283

1661

raise OSError(errno.ENODEV,

2284

"{0} not a character device"

2285

.format(os.devnull))

1662

"%s not a character device"

1663

% os.path.devnull)

2286

1664

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

2287

1665

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

2288

1666

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

2295

1673

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

2296

1674

# Parsing of options, both command line and config file

2297

1675

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()

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]

2341

1704

2342

1705

if options.check:

2343

1706

import doctest

2344

fail_count, test_count = doctest.testmod()

2345

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

1707

doctest.testmod()

1708

sys.exit()

2346

1709

2347

1710

# Default values for config file for server-global settings

2348

1711

server_defaults = { "interface": "",

2350

1713

"port": "",

2351

1714

"debug": "False",

2352

1715

"priority":

2353

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

1716

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

2354

1717

"servicename": "Mandos",

2355

1718

"use_dbus": "True",

2356

1719

"use_ipv6": "True",

2357

1720

"debuglevel": "",

2358

"restore": "True",

2359

"socket": "",

2360

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

2361

"foreground": "False",

2362

1721

}

2363

1722

2364

1723

# Parse config file for server-global settings

2369

1728

# Convert the SafeConfigParser object to a dict

2370

1729

server_settings = server_config.defaults()

2371

1730

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

2372

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

1731

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

2373

1732

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

2374

1733

option)

2375

1734

if server_settings["port"]:

2376

1735

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

2377

1736

"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"])

2387

1737

del server_config

2388

1738

2389

1739

# Override the settings from the config file with command line

2390

1740

# options, if set.

2391

1741

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

2392

1742

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

2393

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

2394

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

1743

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

2395

1744

value = getattr(options, option)

2396

1745

if value is not None:

2397

1746

server_settings[option] = value

2400

1749

for option in server_settings.keys():

2401

1750

if type(server_settings[option]) is str:

2402

1751

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

2410

1752

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

2411

1753

2412

1754

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

2416

1758

debuglevel = server_settings["debuglevel"]

2417

1759

use_dbus = server_settings["use_dbus"]

2418

1760

use_ipv6 = server_settings["use_ipv6"]

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

1761

2432

1762

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

2433

1763

syslogger.setFormatter(logging.Formatter

2434

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

2435

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

2436

.format(server_settings

2437

["servicename"])))

1764

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

1765

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

1766

% server_settings["servicename"]))

2438

1767

2439

1768

# Parse config file with clients

2440

client_config = configparser.SafeConfigParser(Client

2441

.client_defaults)

1769

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

1770

"interval": "5m",

1771

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

1772

"host": "",

1773

"approval_delay": "0s",

1774

"approval_duration": "1s",

1775

}

1776

client_config = configparser.SafeConfigParser(client_defaults)

2442

1777

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

2443

1778

"clients.conf"))

2444

1779

2453

1788

use_ipv6=use_ipv6,

2454

1789

gnutls_priority=

2455

1790

server_settings["priority"],

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

1791

use_dbus=use_dbus)

1792

if not debug:

1793

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

2464

1794

try:

2465

1795

pidfile = open(pidfilename, "w")

2466

except IOError as e:

2467

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

2468

exc_info=e)

1796

except IOError:

1797

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

2469

1798

2470

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

1799

try:

1800

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

1801

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

1802

except KeyError:

2471

1803

try:

2472

uid = pwd.getpwnam(name).pw_uid

2473

gid = pwd.getpwnam(name).pw_gid

2474

break

1804

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

1805

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

2475

1806

except KeyError:

2476

continue

2477

else:

2478

uid = 65534

2479

gid = 65534

1807

try:

1808

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

1809

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

1810

except KeyError:

1811

uid = 65534

1812

gid = 65534

2480

1813

try:

2481

1814

os.setgid(gid)

2482

1815

os.setuid(uid)

2483

except OSError as error:

2484

if error.errno != errno.EPERM:

2485

raise

1816

except OSError, error:

1817

if error[0] != errno.EPERM:

1818

raise error

2486

1819

1820

if not debug and not debuglevel:

1821

syslogger.setLevel(logging.WARNING)

1822

console.setLevel(logging.WARNING)

1823

if debuglevel:

1824

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

1825

syslogger.setLevel(level)

1826

console.setLevel(level)

1827

2487

1828

if debug:

2488

1829

# Enable all possible GnuTLS debugging

2489

1830

2499

1840

.gnutls_global_set_log_function(debug_gnutls))

2500

1841

2501

1842

# Redirect stdin so all checkers get /dev/null

2502

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

1843

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

2503

1844

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

2504

1845

if null > 2:

2505

1846

os.close(null)

1847

else:

1848

# No console logging

1849

logger.removeHandler(console)

2506

1850

2507

1851

# Need to fork before connecting to D-Bus

2508

if not foreground:

1852

if not debug:

2509

1853

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

2510

1854

daemon()

2511

1855

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

2516

1856

global main_loop

2517

1857

# From the Avahi example code

2518

DBusGMainLoop(set_as_default=True)

1858

DBusGMainLoop(set_as_default=True )

2519

1859

main_loop = gobject.MainLoop()

2520

1860

bus = dbus.SystemBus()

2521

1861

# End of Avahi example code

2522

1862

if use_dbus:

2523

1863

try:

2524

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

1864

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

2525

1865

bus, do_not_queue=True)

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)

1866

except dbus.exceptions.NameExistsException, e:

1867

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

2531

1868

use_dbus = False

2532

1869

server_settings["use_dbus"] = False

2533

1870

tcp_server.use_dbus = False

2534

1871

protocol = avahi.PROTO_INET6 if use_ipv6 else avahi.PROTO_INET

2535

service = AvahiServiceToSyslog(name =

2536

server_settings["servicename"],

2537

servicetype = "_mandos._tcp",

2538

protocol = protocol, bus = bus)

1872

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

1873

servicetype = "_mandos._tcp",

1874

protocol = protocol, bus = bus)

2539

1875

if server_settings["interface"]:

2540

1876

service.interface = (if_nametoindex

2541

1877

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

2546

1882

client_class = Client

2547

1883

if use_dbus:

2548

1884

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

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))

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):

2631

1892

try:

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

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()))

2657

1902

if not tcp_server.clients:

2658

1903

logger.warning("No clients defined")

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

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

2670

1917

del pidfilename

2671

1918

1919

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

1920

2672

1921

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

2673

1922

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

2674

1923

2675

1924

if use_dbus:

2676

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

2677

"se.bsnet.fukt.Mandos"})

2678

class MandosDBusService(DBusObjectWithProperties):

1925

class MandosDBusService(dbus.service.Object):

2679

1926

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

2680

1927

def __init__(self):

2681

1928

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

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"}

1929

_interface = "se.bsnet.fukt.Mandos"

2689

1930

2690

1931

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

2691

1932

def ClientAdded(self, objpath):

2706

1947

def GetAllClients(self):

2707

1948

"D-Bus method"

2708

1949

return dbus.Array(c.dbus_object_path

2709

for c in

2710

tcp_server.clients.itervalues())

1950

for c in tcp_server.clients)

2711

1951

2712

1952

@dbus.service.method(_interface,

2713

1953

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

2715

1955

"D-Bus method"

2716

1956

return dbus.Dictionary(

2717

1957

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

2718

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

1958

for c in tcp_server.clients),

2719

1959

signature="oa{sv}")

2720

1960

2721

1961

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

2722

1962

def RemoveClient(self, object_path):

2723

1963

"D-Bus method"

2724

for c in tcp_server.clients.itervalues():

1964

for c in tcp_server.clients:

2725

1965

if c.dbus_object_path == object_path:

2726

del tcp_server.clients[c.name]

1966

tcp_server.clients.remove(c)

2727

1967

c.remove_from_connection()

2728

1968

# Don't signal anything except ClientRemoved

2729

1969

c.disable(quiet=True)

2740

1980

"Cleanup function; run on exit"

2741

1981

service.cleanup()

2742

1982

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

2799

1983

while tcp_server.clients:

2800

name, client = tcp_server.clients.popitem()

1984

client = tcp_server.clients.pop()

2801

1985

if use_dbus:

2802

1986

client.remove_from_connection()

1987

client.disable_hook = None

2803

1988

# Don't signal anything except ClientRemoved

2804

1989

client.disable(quiet=True)

2805

1990

if use_dbus:

2806

1991

# Emit D-Bus signal

2807

mandos_dbus_service.ClientRemoved(client

2808

.dbus_object_path,

1992

mandos_dbus_service.ClientRemoved(client.dbus_object_path,

2809

1993

client.name)

2810

client_settings.clear()

2811

1994

2812

1995

atexit.register(cleanup)

2813

1996

2814

for client in tcp_server.clients.itervalues():

1997

for client in tcp_server.clients:

2815

1998

if use_dbus:

2816

1999

# Emit D-Bus signal

2817

2000

mandos_dbus_service.ClientAdded(client.dbus_object_path)

2818

# Need to initiate checking of clients

2819

if client.enabled:

2820

client.init_checker()

2001

client.enable()

2821

2002

2822

2003

tcp_server.enable()

2823

2004

tcp_server.server_activate()

2826

2007

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

2827

2008

if use_ipv6:

2828

2009

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

2829

" flowinfo %d, scope_id %d",

2830

*tcp_server.socket.getsockname())

2010

" flowinfo %d, scope_id %d"

2011

% tcp_server.socket.getsockname())

2831

2012

else: # IPv4

2832

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

2833

*tcp_server.socket.getsockname())

2013

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

2014

% tcp_server.socket.getsockname())

2834

2015

2835

2016

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

2836

2017

2838

2019

# From the Avahi example code

2839

2020

try:

2840

2021

service.activate()

2841

except dbus.exceptions.DBusException as error:

2842

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

2022

except dbus.exceptions.DBusException, error:

2023

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

2843

2024

cleanup()

2844

2025

sys.exit(1)

2845

2026

# End of Avahi example code

2851

2032

2852

2033

logger.debug("Starting main loop")

2853

2034

main_loop.run()

2854

except AvahiError as error:

2855

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

2035

except AvahiError, error:

2036

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

2856

2037

cleanup()

2857

2038

sys.exit(1)

2858

2039

except KeyboardInterrupt: