/mandos/trunk : revision 482

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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 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 = "1.6.6"

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stored_state_file = "clients.pickle"

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logger = logging.getLogger()

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syslogger = None

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try:

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if_nametoindex = (ctypes.cdll.LoadLibrary

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

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.if_nametoindex)

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except (OSError, AttributeError):

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def if_nametoindex(interface):

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

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

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

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ifreq = fcntl.ioctl(s, SIOCGIFINDEX,

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

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interface))

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

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ifreq[16:20])[0]

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return interface_index

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

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"""init logger and add loglevel"""

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global syslogger

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syslogger = (logging.handlers.SysLogHandler

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(facility =

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logging.handlers.SysLogHandler.LOG_DAEMON,

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

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syslogger.setFormatter(logging.Formatter

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

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' %(message)s'))

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logger.addHandler(syslogger)

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if debug:

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console = logging.StreamHandler()

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

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' [%(process)d]:'

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' %(levelname)s:'

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' %(message)s'))

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logger.addHandler(console)

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logger.setLevel(level)

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class PGPError(Exception):

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

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pass

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class PGPEngine(object):

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

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def __init__(self):

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

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self.gnupgargs = ['--batch',

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'--home', self.tempdir,

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'--force-mdc',

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'--quiet',

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'--no-use-agent']

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def __enter__(self):

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return self

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

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self._cleanup()

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return False

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def __del__(self):

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self._cleanup()

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def _cleanup(self):

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if self.tempdir is not None:

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# Delete contents of tempdir

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

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topdown = False):

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for filename in files:

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

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for dirname in dirs:

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

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# Remove tempdir

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os.rmdir(self.tempdir)

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self.tempdir = None

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def password_encode(self, password):

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

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

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

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if len(encoded) > 2048:

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

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

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

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

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return encoded

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def encrypt(self, data, password):

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passphrase = self.password_encode(password)

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with tempfile.NamedTemporaryFile(dir=self.tempdir

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) as passfile:

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passfile.write(passphrase)

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passfile.flush()

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

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'--passphrase-file',

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passfile.name]

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+ self.gnupgargs,

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stdin = subprocess.PIPE,

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stdout = subprocess.PIPE,

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stderr = subprocess.PIPE)

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

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if proc.returncode != 0:

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raise PGPError(err)

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return ciphertext

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def decrypt(self, data, password):

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passphrase = self.password_encode(password)

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with tempfile.NamedTemporaryFile(dir = self.tempdir

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) as passfile:

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passfile.write(passphrase)

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passfile.flush()

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

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'--passphrase-file',

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passfile.name]

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+ self.gnupgargs,

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stdin = subprocess.PIPE,

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stdout = subprocess.PIPE,

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stderr = subprocess.PIPE)

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decrypted_plaintext, err = proc.communicate(input

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= data)

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if proc.returncode != 0:

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raise PGPError(err)

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return decrypted_plaintext

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version = "1.3.0"

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#logger = logging.getLogger('mandos')

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logger = logging.Logger('mandos')

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syslogger = (logging.handlers.SysLogHandler

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(facility = logging.handlers.SysLogHandler.LOG_DAEMON,

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

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syslogger.setFormatter(logging.Formatter

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

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' %(message)s'))

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logger.addHandler(syslogger)

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console = logging.StreamHandler()

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

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' %(levelname)s:'

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' %(message)s'))

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logger.addHandler(console)

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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.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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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.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) as e:

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pass

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self.group = None

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if self.entry_group_state_changed_match is not None:

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self.entry_group_state_changed_match.remove()

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self.entry_group_state_changed_match = None

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if self.group is not None:

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self.group.Reset()

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def add(self):

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

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self.remove()

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if self.group is None:

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self.group = dbus.Interface(

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self.bus.get_object(avahi.DBUS_NAME,

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self.server.EntryGroupNew()),

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avahi.DBUS_INTERFACE_ENTRY_GROUP)

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self.group = dbus.Interface(

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self.bus.get_object(avahi.DBUS_NAME,

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self.server.EntryGroupNew(),

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follow_name_owner_changes=True),

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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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'StateChanged', self .entry_group_state_changed))

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

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self.name, self.type)

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self.group.AddService(

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dbus.UInt16(self.port),

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avahi.string_array_to_txt_array(self.TXT))

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self.group.Commit()

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def entry_group_state_changed(self, state, error):

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

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

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elif state == avahi.ENTRY_GROUP_FAILURE:

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

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unicode(error))

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raise AvahiGroupError("State changed: {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 = None

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self.remove()

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

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

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

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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 bad_states[state]:

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logger.error(bad_states[state])

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

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def activate(self):

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

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if self.server is None:

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

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class AvahiServiceToSyslog(AvahiService):

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def rename(self):

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

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ret = AvahiService.rename(self)

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syslogger.setFormatter(logging.Formatter

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

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

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.format(self.name)))

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return ret

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def timedelta_to_milliseconds(td):

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"Convert a datetime.timedelta() to milliseconds"

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

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+ (td.seconds * 1000)

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+ (td.microseconds // 1000))

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class Client(object):

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

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Attributes:

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

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

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

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

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

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

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checker_initiator_tag: a gobject event source tag, or None

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

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client_structure: Object describing what attributes a client has

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and is used for storing the client at exit

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current_checker_command: string; current running checker_command

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

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disable_initiator_tag: a gobject event source tag, or None

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enabled: bool()

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

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

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

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

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last_checker_status: integer between 0 and 255 reflecting exit

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status of last checker. -1 reflects crashed

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checker, -2 means no checker completed yet.

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

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last_enabled: datetime.datetime(); (UTC)

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

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D-Bus identifiers

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

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

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until this client is disabled

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extended_timeout: extra long timeout when secret has been sent

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runtime_expansions: Allowed attributes for runtime expansion.

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

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disabled, or None

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server_settings: The server_settings dict from main()

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"""

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runtime_expansions = ("approval_delay", "approval_duration",

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

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

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"last_approval_request", "last_checked_ok",

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

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

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

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client_defaults = { "timeout": "PT5M",

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"extended_timeout": "PT15M",

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"interval": "PT2M",

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

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"host": "",

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"approval_delay": "PT0S",

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"approval_duration": "PT1S",

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"approved_by_default": "True",

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"enabled": "True",

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}

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@staticmethod

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def _timedelta_to_milliseconds(td):

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"Convert a datetime.timedelta() to milliseconds"

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

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+ (td.seconds * 1000)

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+ (td.microseconds // 1000))

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def timeout_milliseconds(self):

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"Return the 'timeout' attribute in milliseconds"

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return timedelta_to_milliseconds(self.timeout)

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def extended_timeout_milliseconds(self):

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"Return the 'extended_timeout' attribute in milliseconds"

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return timedelta_to_milliseconds(self.extended_timeout)

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return self._timedelta_to_milliseconds(self.timeout)

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def interval_milliseconds(self):

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"Return the 'interval' attribute in milliseconds"

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return timedelta_to_milliseconds(self.interval)

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return self._timedelta_to_milliseconds(self.interval)

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def approval_delay_milliseconds(self):

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return timedelta_to_milliseconds(self.approval_delay)

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@staticmethod

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def config_parser(config):

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

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

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with exceptions for any special settings as defined above.

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

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value given the same arguments.

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"""

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settings = {}

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for client_name in config.sections():

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section = dict(config.items(client_name))

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client = settings[client_name] = {}

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

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# Reformat values from string types to Python types

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client["approved_by_default"] = config.getboolean(

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client_name, "approved_by_default")

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

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"enabled")

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

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.replace(" ", ""))

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if "secret" in section:

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

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elif "secfile" in section:

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

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(section["secfile"])),

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"rb") as secfile:

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

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else:

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

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.format(section))

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

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client["extended_timeout"] = string_to_delta(

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section["extended_timeout"])

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

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client["approval_delay"] = string_to_delta(

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section["approval_delay"])

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client["approval_duration"] = string_to_delta(

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section["approval_duration"])

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

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client["last_approval_request"] = None

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client["last_checked_ok"] = None

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client["last_checker_status"] = -2

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return settings

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

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return self._timedelta_to_milliseconds(self.approval_delay)

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

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

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

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attribute."""

534

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self.name = name

535

if server_settings is None:

536

server_settings = {}

537

self.server_settings = server_settings

538

# adding all client settings

539

for setting, value in settings.iteritems():

540

setattr(self, setting, value)

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if self.enabled:

543

if not hasattr(self, "last_enabled"):

544

self.last_enabled = datetime.datetime.utcnow()

545

if not hasattr(self, "expires"):

546

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

547

+ self.timeout)

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else:

549

self.last_enabled = None

550

self.expires = None

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if config is None:

324

config = {}

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

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# Uppercase and remove spaces from fingerprint for later

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# comparison purposes with return value from the fingerprint()

555

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# function

329

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

330

.replace(" ", ""))

556

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

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

558

datetime.datetime.utcnow())

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# attributes specific for this server instance

332

if "secret" in config:

333

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

334

elif "secfile" in config:

335

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

336

(config["secfile"])),

337

"rb") as secfile:

338

self.secret = secfile.read()

339

else:

340

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

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% self.name)

342

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

343

self.created = datetime.datetime.utcnow()

344

self.enabled = False

345

self.last_approval_request = None

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self.last_enabled = None

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self.last_checked_ok = None

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

349

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

350

self.disable_hook = disable_hook

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self.checker = None

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self.checker_initiator_tag = None

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self.disable_initiator_tag = None

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self.checker_callback_tag = None

355

self.checker_command = config["checker"]

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self.current_checker_command = None

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self.approved = None

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self.last_connect = None

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self._approved = None

359

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

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True)

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self.approvals_pending = 0

568

self.changedstate = (multiprocessing_manager

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.Condition(multiprocessing_manager

570

.Lock()))

571

self.client_structure = [attr for attr in

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self.__dict__.iterkeys()

573

if not attr.startswith("_")]

574

self.client_structure.append("client_structure")

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

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lambda obj:

578

isinstance(obj,

579

property)):

580

if not name.startswith("_"):

581

self.client_structure.append(name)

362

self.approval_delay = string_to_delta(

363

config["approval_delay"])

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self.approval_duration = string_to_delta(

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config["approval_duration"])

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

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367

583

# Send notice to process children that client state has changed

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368

def send_changedstate(self):

585

with self.changedstate:

586

self.changedstate.notify_all()

587

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self.changedstate.acquire()

370

self.changedstate.notify_all()

371

self.changedstate.release()

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373

def enable(self):

589

374

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

590

375

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

591

376

# Already enabled

592

377

return

593

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

594

self.enabled = True

378

self.send_changedstate()

595

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self.last_enabled = datetime.datetime.utcnow()

596

self.init_checker()

597

self.send_changedstate()

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def disable(self, quiet=True):

600

"""Disable this client."""

601

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

602

return False

603

if not quiet:

604

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

605

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

606

gobject.source_remove(self.disable_initiator_tag)

607

self.disable_initiator_tag = None

608

self.expires = None

609

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

610

gobject.source_remove(self.checker_initiator_tag)

611

self.checker_initiator_tag = None

612

self.stop_checker()

613

self.enabled = False

614

if not quiet:

615

self.send_changedstate()

616

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

617

return False

618

619

def __del__(self):

620

self.disable()

621

622

def init_checker(self):

623

380

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

624

381

# and every interval from then on.

625

if self.checker_initiator_tag is not None:

626

gobject.source_remove(self.checker_initiator_tag)

627

382

self.checker_initiator_tag = (gobject.timeout_add

628

383

(self.interval_milliseconds(),

629

384

self.start_checker))

630

385

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

631

if self.disable_initiator_tag is not None:

632

gobject.source_remove(self.disable_initiator_tag)

633

386

self.disable_initiator_tag = (gobject.timeout_add

634

387

(self.timeout_milliseconds(),

635

388

self.disable))

389

self.enabled = True

636

390

# Also start a new checker *right now*.

637

391

self.start_checker()

638

392

393

def disable(self, quiet=True):

394

"""Disable this client."""

395

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

396

return False

397

if not quiet:

398

self.send_changedstate()

399

if not quiet:

400

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

401

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

402

gobject.source_remove(self.disable_initiator_tag)

403

self.disable_initiator_tag = None

404

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

405

gobject.source_remove(self.checker_initiator_tag)

406

self.checker_initiator_tag = None

407

self.stop_checker()

408

if self.disable_hook:

409

self.disable_hook(self)

410

self.enabled = False

411

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

412

return False

413

414

def __del__(self):

415

self.disable_hook = None

416

self.disable()

417

639

418

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

640

419

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

641

420

self.checker_callback_tag = None

642

421

self.checker = None

643

422

if os.WIFEXITED(condition):

644

self.last_checker_status = os.WEXITSTATUS(condition)

645

if self.last_checker_status == 0:

423

exitstatus = os.WEXITSTATUS(condition)

424

if exitstatus == 0:

646

425

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

647

426

vars(self))

648

427

self.checked_ok()

650

429

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

651

430

vars(self))

652

431

else:

653

self.last_checker_status = -1

654

432

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

655

433

vars(self))

656

434

657

435

def checked_ok(self):

658

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

436

"""Bump up the timeout for this client.

437

438

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

439

alive and well.

440

"""

659

441

self.last_checked_ok = datetime.datetime.utcnow()

660

self.last_checker_status = 0

661

self.bump_timeout()

662

663

def bump_timeout(self, timeout=None):

664

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

665

if timeout is None:

666

timeout = self.timeout

667

if self.disable_initiator_tag is not None:

668

gobject.source_remove(self.disable_initiator_tag)

669

self.disable_initiator_tag = None

670

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

671

self.disable_initiator_tag = (gobject.timeout_add

672

(timedelta_to_milliseconds

673

(timeout), self.disable))

674

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

442

gobject.source_remove(self.disable_initiator_tag)

443

self.disable_initiator_tag = (gobject.timeout_add

444

(self.timeout_milliseconds(),

445

self.disable))

675

446

676

447

def need_approval(self):

677

448

self.last_approval_request = datetime.datetime.utcnow()

682

453

If a checker already exists, leave it running and do

683

454

nothing."""

684

455

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

685

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

686

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

687

# would inevitably timeout, since no checker would get a

688

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

456

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

457

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

458

# client would inevitably timeout, since no checker would get

459

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

689

460

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

690

461

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

691

462

# should be.

693

464

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

694

465

try:

695

466

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

696

except AttributeError:

697

pass

698

except OSError as error:

699

if error.errno != errno.ECHILD:

700

raise

467

except (AttributeError, OSError) as error:

468

if (isinstance(error, OSError)

469

and error.errno != errno.ECHILD):

470

raise error

701

471

else:

702

472

if pid:

703

473

logger.warning("Checker was a zombie")

706

476

self.current_checker_command)

707

477

# Start a new checker if needed

708

478

if self.checker is None:

709

# Escape attributes for the shell

710

escaped_attrs = dict(

711

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

712

for attr in

713

self.runtime_expansions)

714

479

try:

715

command = self.checker_command % escaped_attrs

716

except TypeError as error:

717

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

718

self.checker_command, exc_info=error)

719

return True # Try again later

480

# In case checker_command has exactly one % operator

481

command = self.checker_command % self.host

482

except TypeError:

483

# Escape attributes for the shell

484

escaped_attrs = dict(

485

(attr,

486

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

487

errors=

488

'replace')))

489

for attr in

490

self.runtime_expansions)

491

492

try:

493

command = self.checker_command % escaped_attrs

494

except TypeError as error:

495

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

496

' %s', self.checker_command, error)

497

return True # Try again later

720

498

self.current_checker_command = command

721

499

try:

722

500

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

725

503

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

726

504

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

727

505

# always replaced by /dev/null.)

728

# The exception is when not debugging but nevertheless

729

# running in the foreground; use the previously

730

# created wnull.

731

popen_args = {}

732

if (not self.server_settings["debug"]

733

and self.server_settings["foreground"]):

734

popen_args.update({"stdout": wnull,

735

"stderr": wnull })

736

506

self.checker = subprocess.Popen(command,

737

507

close_fds=True,

738

shell=True, cwd="/",

739

**popen_args)

740

except OSError as error:

741

logger.error("Failed to start subprocess",

742

exc_info=error)

743

return True

744

self.checker_callback_tag = (gobject.child_watch_add

745

(self.checker.pid,

746

self.checker_callback,

747

data=command))

748

# The checker may have completed before the gobject

749

# watch was added. Check for this.

750

try:

508

shell=True, cwd="/")

509

self.checker_callback_tag = (gobject.child_watch_add

510

(self.checker.pid,

511

self.checker_callback,

512

data=command))

513

# The checker may have completed before the gobject

514

# watch was added. Check for this.

751

515

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

516

if pid:

517

gobject.source_remove(self.checker_callback_tag)

518

self.checker_callback(pid, status, command)

752

519

except OSError as error:

753

if error.errno == errno.ECHILD:

754

# This should never happen

755

logger.error("Child process vanished",

756

exc_info=error)

757

return True

758

raise

759

if pid:

760

gobject.source_remove(self.checker_callback_tag)

761

self.checker_callback(pid, status, command)

520

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

521

error)

762

522

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

763

523

return True

764

524

771

531

return

772

532

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

773

533

try:

774

self.checker.terminate()

534

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

775

535

#time.sleep(0.5)

776

536

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

777

# self.checker.kill()

537

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

778

538

except OSError as error:

779

539

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

780

540

raise

781

541

self.checker = None

782

542

783

784

543

def dbus_service_property(dbus_interface, signature="v",

785

544

access="readwrite", byte_arrays=False):

786

545

"""Decorators for marking methods of a DBusObjectWithProperties to

797

556

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

798

557

if byte_arrays and signature != "ay":

799

558

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

800

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

559

" signature %r" % signature)

801

560

def decorator(func):

802

561

func._dbus_is_property = True

803

562

func._dbus_interface = dbus_interface

811

570

return decorator

812

571

813

572

814

def dbus_interface_annotations(dbus_interface):

815

"""Decorator for marking functions returning interface annotations

816

817

Usage:

818

819

@dbus_interface_annotations("org.example.Interface")

820

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

821

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

822

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

823

"false"}

824

"""

825

def decorator(func):

826

func._dbus_is_interface = True

827

func._dbus_interface = dbus_interface

828

func._dbus_name = dbus_interface

829

return func

830

return decorator

831

832

833

def dbus_annotations(annotations):

834

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

835

Usage:

836

837

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

838

access="r")

839

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

840

"org.freedesktop.DBus.Property."

841

"EmitsChangedSignal": "false"})

842

def Property_dbus_property(self):

843

return dbus.Boolean(False)

844

"""

845

def decorator(func):

846

func._dbus_annotations = annotations

847

return func

848

return decorator

849

850

851

573

class DBusPropertyException(dbus.exceptions.DBusException):

852

574

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

853

575

"""

869

591

870

592

class DBusObjectWithProperties(dbus.service.Object):

871

593

"""A D-Bus object with properties.

872

594

873

595

Classes inheriting from this can use the dbus_service_property

874

596

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

875

597

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

876

598

"""

877

599

878

600

@staticmethod

879

def _is_dbus_thing(thing):

880

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

881

882

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

883

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

884

"""

885

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

886

False)

601

def _is_dbus_property(obj):

602

return getattr(obj, "_dbus_is_property", False)

887

603

888

def _get_all_dbus_things(self, thing):

604

def _get_all_dbus_properties(self):

889

605

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

890

606

"""

891

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

892

name),

893

athing.__get__(self))

894

for cls in self.__class__.__mro__

895

for name, athing in

896

inspect.getmembers(cls,

897

self._is_dbus_thing(thing)))

607

return ((prop._dbus_name, prop)

608

for name, prop in

609

inspect.getmembers(self, self._is_dbus_property))

898

610

899

611

def _get_dbus_property(self, interface_name, property_name):

900

612

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

901

613

property with the specified name and interface.

902

614

"""

903

for cls in self.__class__.__mro__:

904

for name, value in (inspect.getmembers

905

(cls,

906

self._is_dbus_thing("property"))):

907

if (value._dbus_name == property_name

908

and value._dbus_interface == interface_name):

909

return value.__get__(self)

910

615

for name in (property_name,

616

property_name + "_dbus_property"):

617

prop = getattr(self, name, None)

618

if (prop is None

619

or not self._is_dbus_property(prop)

620

or prop._dbus_name != property_name

621

or (interface_name and prop._dbus_interface

622

and interface_name != prop._dbus_interface)):

623

continue

624

return prop

911

625

# No such property

912

626

raise DBusPropertyNotFound(self.dbus_object_path + ":"

913

627

+ interface_name + "."

937

651

# The byte_arrays option is not supported yet on

938

652

# signatures other than "ay".

939

653

if prop._dbus_signature != "ay":

940

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

941

"'ay' signature {0!r}"

942

.format(prop._dbus_signature))

943

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

944

for byte in value))

654

raise ValueError

655

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

656

for byte in value))

945

657

prop(value)

946

658

947

659

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

949

661

def GetAll(self, interface_name):

950

662

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

951

663

standard.

952

664

953

665

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

954

666

"""

955

properties = {}

956

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

667

all = {}

668

for name, prop in self._get_all_dbus_properties():

957

669

if (interface_name

958

670

and interface_name != prop._dbus_interface):

959

671

# Interface non-empty but did not match

963

675

continue

964

676

value = prop()

965

677

if not hasattr(value, "variant_level"):

966

properties[name] = value

678

all[name] = value

967

679

continue

968

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

969

value.variant_level+1)

970

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

680

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

681

value.variant_level+1)

682

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

971

683

972

684

@dbus.service.method(dbus.INTROSPECTABLE_IFACE,

973

685

out_signature="s",

974

686

path_keyword='object_path',

975

687

connection_keyword='connection')

976

688

def Introspect(self, object_path, connection):

977

"""Overloading of standard D-Bus method.

978

979

Inserts property tags and interface annotation tags.

689

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

980

690

"""

981

691

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

982

692

connection)

989

699

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

990

700

return e

991

701

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

992

# Add property tags

993

702

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

994

703

for name, prop

995

in self._get_all_dbus_things("property")

704

in self._get_all_dbus_properties()

996

705

if prop._dbus_interface

997

706

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

998

707

if_tag.appendChild(tag)

999

# Add annotation tags

1000

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

1001

for tag in if_tag.getElementsByTagName(typ):

1002

annots = dict()

1003

for name, prop in (self.

1004

_get_all_dbus_things(typ)):

1005

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

1006

and prop._dbus_interface

1007

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

1008

annots.update(getattr

1009

(prop,

1010

"_dbus_annotations",

1011

{}))

1012

for name, value in annots.iteritems():

1013

ann_tag = document.createElement(

1014

"annotation")

1015

ann_tag.setAttribute("name", name)

1016

ann_tag.setAttribute("value", value)

1017

tag.appendChild(ann_tag)

1018

# Add interface annotation tags

1019

for annotation, value in dict(

1020

itertools.chain.from_iterable(

1021

annotations().iteritems()

1022

for name, annotations in

1023

self._get_all_dbus_things("interface")

1024

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

1025

)).iteritems():

1026

ann_tag = document.createElement("annotation")

1027

ann_tag.setAttribute("name", annotation)

1028

ann_tag.setAttribute("value", value)

1029

if_tag.appendChild(ann_tag)

1030

708

# Add the names to the return values for the

1031

709

# "org.freedesktop.DBus.Properties" methods

1032

710

if (if_tag.getAttribute("name")

1047

725

except (AttributeError, xml.dom.DOMException,

1048

726

xml.parsers.expat.ExpatError) as error:

1049

727

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

1050

exc_info=error)

728

error)

1051

729

return xmlstring

1052

730

1053

731

1054

def datetime_to_dbus(dt, variant_level=0):

1055

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

1056

if dt is None:

1057

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

1058

return dbus.String(dt.isoformat(),

1059

variant_level=variant_level)

1060

1061

1062

def alternate_dbus_interfaces(alt_interface_names, deprecate=True):

1063

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

1064

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

1065

interface names according to the "alt_interface_names" mapping.

1066

Usage:

1067

1068

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

1069

"net.example.AlternateInterface"})

1070

class SampleDBusObject(dbus.service.Object):

1071

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

1072

def SampleDBusMethod():

1073

pass

1074

1075

The above "SampleDBusMethod" on "SampleDBusObject" will be

1076

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

1077

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

1078

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

1079

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

1080

1081

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

1082

(from DBusObjectWithProperties) and interfaces (from the

1083

dbus_interface_annotations decorator).

1084

"""

1085

def wrapper(cls):

1086

for orig_interface_name, alt_interface_name in (

1087

alt_interface_names.iteritems()):

1088

attr = {}

1089

interface_names = set()

1090

# Go though all attributes of the class

1091

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

1092

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

1093

# with the wrong interface name

1094

if (not hasattr(attribute, "_dbus_interface")

1095

or not attribute._dbus_interface

1096

.startswith(orig_interface_name)):

1097

continue

1098

# Create an alternate D-Bus interface name based on

1099

# the current name

1100

alt_interface = (attribute._dbus_interface

1101

.replace(orig_interface_name,

1102

alt_interface_name))

1103

interface_names.add(alt_interface)

1104

# Is this a D-Bus signal?

1105

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

1106

# Extract the original non-method undecorated

1107

# function by black magic

1108

nonmethod_func = (dict(

1109

zip(attribute.func_code.co_freevars,

1110

attribute.__closure__))["func"]

1111

.cell_contents)

1112

# Create a new, but exactly alike, function

1113

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

1114

# with the alternate D-Bus interface name

1115

new_function = (dbus.service.signal

1116

(alt_interface,

1117

attribute._dbus_signature)

1118

(types.FunctionType(

1119

nonmethod_func.func_code,

1120

nonmethod_func.func_globals,

1121

nonmethod_func.func_name,

1122

nonmethod_func.func_defaults,

1123

nonmethod_func.func_closure)))

1124

# Copy annotations, if any

1125

try:

1126

new_function._dbus_annotations = (

1127

dict(attribute._dbus_annotations))

1128

except AttributeError:

1129

pass

1130

# Define a creator of a function to call both the

1131

# original and alternate functions, so both the

1132

# original and alternate signals gets sent when

1133

# the function is called

1134

def fixscope(func1, func2):

1135

"""This function is a scope container to pass

1136

func1 and func2 to the "call_both" function

1137

outside of its arguments"""

1138

def call_both(*args, **kwargs):

1139

"""This function will emit two D-Bus

1140

signals by calling func1 and func2"""

1141

func1(*args, **kwargs)

1142

func2(*args, **kwargs)

1143

return call_both

1144

# Create the "call_both" function and add it to

1145

# the class

1146

attr[attrname] = fixscope(attribute, new_function)

1147

# Is this a D-Bus method?

1148

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

1149

# Create a new, but exactly alike, function

1150

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

1151

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

1152

# to the class.

1153

attr[attrname] = (dbus.service.method

1154

(alt_interface,

1155

attribute._dbus_in_signature,

1156

attribute._dbus_out_signature)

1157

(types.FunctionType

1158

(attribute.func_code,

1159

attribute.func_globals,

1160

attribute.func_name,

1161

attribute.func_defaults,

1162

attribute.func_closure)))

1163

# Copy annotations, if any

1164

try:

1165

attr[attrname]._dbus_annotations = (

1166

dict(attribute._dbus_annotations))

1167

except AttributeError:

1168

pass

1169

# Is this a D-Bus property?

1170

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

1171

# Create a new, but exactly alike, function

1172

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

1173

# property with the alternate D-Bus interface

1174

# name. Add it to the class.

1175

attr[attrname] = (dbus_service_property

1176

(alt_interface,

1177

attribute._dbus_signature,

1178

attribute._dbus_access,

1179

attribute

1180

._dbus_get_args_options

1181

["byte_arrays"])

1182

(types.FunctionType

1183

(attribute.func_code,

1184

attribute.func_globals,

1185

attribute.func_name,

1186

attribute.func_defaults,

1187

attribute.func_closure)))

1188

# Copy annotations, if any

1189

try:

1190

attr[attrname]._dbus_annotations = (

1191

dict(attribute._dbus_annotations))

1192

except AttributeError:

1193

pass

1194

# Is this a D-Bus interface?

1195

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

1196

# Create a new, but exactly alike, function

1197

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

1198

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

1199

# to the class.

1200

attr[attrname] = (dbus_interface_annotations

1201

(alt_interface)

1202

(types.FunctionType

1203

(attribute.func_code,

1204

attribute.func_globals,

1205

attribute.func_name,

1206

attribute.func_defaults,

1207

attribute.func_closure)))

1208

if deprecate:

1209

# Deprecate all alternate interfaces

1210

iname="_AlternateDBusNames_interface_annotation{0}"

1211

for interface_name in interface_names:

1212

@dbus_interface_annotations(interface_name)

1213

def func(self):

1214

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

1215

"true" }

1216

# Find an unused name

1217

for aname in (iname.format(i)

1218

for i in itertools.count()):

1219

if aname not in attr:

1220

attr[aname] = func

1221

break

1222

if interface_names:

1223

# Replace the class with a new subclass of it with

1224

# methods, signals, etc. as created above.

1225

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

1226

(cls,), attr)

1227

return cls

1228

return wrapper

1229

1230

1231

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

1232

"se.bsnet.fukt.Mandos"})

1233

732

class ClientDBus(Client, DBusObjectWithProperties):

1234

733

"""A Client class using D-Bus

1235

734

1244

743

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

1245

744

1246

745

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

746

self._approvals_pending = 0

1247

747

self.bus = bus

1248

748

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

1249

749

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

1255

755

("/clients/" + client_object_name))

1256

756

DBusObjectWithProperties.__init__(self, self.bus,

1257

757

self.dbus_object_path)

1258

1259

def notifychangeproperty(transform_func,

1260

dbus_name, type_func=lambda x: x,

1261

variant_level=1):

1262

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

1263

its changes to DBus.

1264

1265

transform_fun: Function that takes a value and a variant_level

1266

and transforms it to a D-Bus type.

1267

dbus_name: D-Bus name of the variable

1268

type_func: Function that transform the value before sending it

1269

to the D-Bus. Default: no transform

1270

variant_level: D-Bus variant level. Default: 1

1271

"""

1272

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

1273

def setter(self, value):

1274

if hasattr(self, "dbus_object_path"):

1275

if (not hasattr(self, attrname) or

1276

type_func(getattr(self, attrname, None))

1277

!= type_func(value)):

1278

dbus_value = transform_func(type_func(value),

1279

variant_level

1280

=variant_level)

1281

self.PropertyChanged(dbus.String(dbus_name),

1282

dbus_value)

1283

setattr(self, attrname, value)

1284

1285

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

1286

1287

expires = notifychangeproperty(datetime_to_dbus, "Expires")

1288

approvals_pending = notifychangeproperty(dbus.Boolean,

1289

"ApprovalPending",

1290

type_func = bool)

1291

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

1292

last_enabled = notifychangeproperty(datetime_to_dbus,

1293

"LastEnabled")

1294

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

1295

type_func = lambda checker:

1296

checker is not None)

1297

last_checked_ok = notifychangeproperty(datetime_to_dbus,

1298

"LastCheckedOK")

1299

last_checker_status = notifychangeproperty(dbus.Int16,

1300

"LastCheckerStatus")

1301

last_approval_request = notifychangeproperty(

1302

datetime_to_dbus, "LastApprovalRequest")

1303

approved_by_default = notifychangeproperty(dbus.Boolean,

1304

"ApprovedByDefault")

1305

approval_delay = notifychangeproperty(dbus.UInt64,

1306

"ApprovalDelay",

1307

type_func =

1308

timedelta_to_milliseconds)

1309

approval_duration = notifychangeproperty(

1310

dbus.UInt64, "ApprovalDuration",

1311

type_func = timedelta_to_milliseconds)

1312

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

1313

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

1314

type_func =

1315

timedelta_to_milliseconds)

1316

extended_timeout = notifychangeproperty(

1317

dbus.UInt64, "ExtendedTimeout",

1318

type_func = timedelta_to_milliseconds)

1319

interval = notifychangeproperty(dbus.UInt64,

1320

"Interval",

1321

type_func =

1322

timedelta_to_milliseconds)

1323

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

1324

1325

del notifychangeproperty

758

759

def _get_approvals_pending(self):

760

return self._approvals_pending

761

def _set_approvals_pending(self, value):

762

old_value = self._approvals_pending

763

self._approvals_pending = value

764

bval = bool(value)

765

if (hasattr(self, "dbus_object_path")

766

and bval is not bool(old_value)):

767

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

768

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

769

dbus_bool)

770

771

approvals_pending = property(_get_approvals_pending,

772

_set_approvals_pending)

773

del _get_approvals_pending, _set_approvals_pending

774

775

@staticmethod

776

def _datetime_to_dbus(dt, variant_level=0):

777

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

778

return dbus.String(dt.isoformat(),

779

variant_level=variant_level)

780

781

def enable(self):

782

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

783

r = Client.enable(self)

784

if oldstate != self.enabled:

785

# Emit D-Bus signals

786

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

787

dbus.Boolean(True, variant_level=1))

788

self.PropertyChanged(

789

dbus.String("LastEnabled"),

790

self._datetime_to_dbus(self.last_enabled,

791

variant_level=1))

792

return r

793

794

def disable(self, quiet = False):

795

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

796

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

797

if not quiet and oldstate != self.enabled:

798

# Emit D-Bus signal

799

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

800

dbus.Boolean(False, variant_level=1))

801

return r

1326

802

1327

803

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

1328

804

try:

1337

813

*args, **kwargs):

1338

814

self.checker_callback_tag = None

1339

815

self.checker = None

816

# Emit D-Bus signal

817

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

818

dbus.Boolean(False, variant_level=1))

1340

819

if os.WIFEXITED(condition):

1341

820

exitstatus = os.WEXITSTATUS(condition)

1342

821

# Emit D-Bus signal

1352

831

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

1353

832

*args, **kwargs)

1354

833

834

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

835

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

836

# Emit D-Bus signal

837

self.PropertyChanged(

838

dbus.String("LastCheckedOK"),

839

(self._datetime_to_dbus(self.last_checked_ok,

840

variant_level=1)))

841

842

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

843

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

844

# Emit D-Bus signal

845

self.PropertyChanged(

846

dbus.String("LastApprovalRequest"),

847

(self._datetime_to_dbus(self.last_approval_request,

848

variant_level=1)))

849

return r

850

1355

851

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

1356

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

852

old_checker = self.checker

853

if self.checker is not None:

854

old_checker_pid = self.checker.pid

855

else:

856

old_checker_pid = None

1357

857

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

1358

858

# Only if new checker process was started

1359

859

if (self.checker is not None

1360

860

and old_checker_pid != self.checker.pid):

1361

861

# Emit D-Bus signal

1362

862

self.CheckerStarted(self.current_checker_command)

863

self.PropertyChanged(

864

dbus.String("CheckerRunning"),

865

dbus.Boolean(True, variant_level=1))

1363

866

return r

1364

867

868

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

869

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

870

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

871

if (old_checker is not None

872

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

873

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

874

dbus.Boolean(False, variant_level=1))

875

return r

876

1365

877

def _reset_approved(self):

1366

self.approved = None

878

self._approved = None

1367

879

return False

1368

880

1369

881

def approve(self, value=True):

1370

self.approved = value

1371

gobject.timeout_add(timedelta_to_milliseconds

882

self.send_changedstate()

883

self._approved = value

884

gobject.timeout_add(self._timedelta_to_milliseconds

1372

885

(self.approval_duration),

1373

886

self._reset_approved)

1374

self.send_changedstate()

887

1375

888

1376

889

## D-Bus methods, signals & properties

1377

_interface = "se.recompile.Mandos.Client"

1378

1379

## Interfaces

1380

1381

@dbus_interface_annotations(_interface)

1382

def _foo(self):

1383

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

1384

"false"}

890

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

1385

891

1386

892

## Signals

1387

893

1473

979

if value is None: # get

1474

980

return dbus.Boolean(self.approved_by_default)

1475

981

self.approved_by_default = bool(value)

982

# Emit D-Bus signal

983

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

984

dbus.Boolean(value, variant_level=1))

1476

985

1477

986

# ApprovalDelay - property

1478

987

@dbus_service_property(_interface, signature="t",

1481

990

if value is None: # get

1482

991

return dbus.UInt64(self.approval_delay_milliseconds())

1483

992

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

993

# Emit D-Bus signal

994

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

995

dbus.UInt64(value, variant_level=1))

1484

996

1485

997

# ApprovalDuration - property

1486

998

@dbus_service_property(_interface, signature="t",

1487

999

access="readwrite")

1488

1000

def ApprovalDuration_dbus_property(self, value=None):

1489

1001

if value is None: # get

1490

return dbus.UInt64(timedelta_to_milliseconds(

1002

return dbus.UInt64(self._timedelta_to_milliseconds(

1491

1003

self.approval_duration))

1492

1004

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

1005

# Emit D-Bus signal

1006

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

1007

dbus.UInt64(value, variant_level=1))

1493

1008

1494

1009

# Name - property

1495

1010

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

1507

1022

def Host_dbus_property(self, value=None):

1508

1023

if value is None: # get

1509

1024

return dbus.String(self.host)

1510

self.host = unicode(value)

1025

self.host = value

1026

# Emit D-Bus signal

1027

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

1028

dbus.String(value, variant_level=1))

1511

1029

1512

1030

# Created - property

1513

1031

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

1514

1032

def Created_dbus_property(self):

1515

return datetime_to_dbus(self.created)

1033

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

1516

1034

1517

1035

# LastEnabled - property

1518

1036

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

1519

1037

def LastEnabled_dbus_property(self):

1520

return datetime_to_dbus(self.last_enabled)

1038

if self.last_enabled is None:

1039

return dbus.String("")

1040

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

1521

1041

1522

1042

# Enabled - property

1523

1043

@dbus_service_property(_interface, signature="b",

1537

1057

if value is not None:

1538

1058

self.checked_ok()

1539

1059

return

1540

return datetime_to_dbus(self.last_checked_ok)

1541

1542

# LastCheckerStatus - property

1543

@dbus_service_property(_interface, signature="n",

1544

access="read")

1545

def LastCheckerStatus_dbus_property(self):

1546

return dbus.Int16(self.last_checker_status)

1547

1548

# Expires - property

1549

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

1550

def Expires_dbus_property(self):

1551

return datetime_to_dbus(self.expires)

1060

if self.last_checked_ok is None:

1061

return dbus.String("")

1062

return dbus.String(self._datetime_to_dbus(self

1063

.last_checked_ok))

1552

1064

1553

1065

# LastApprovalRequest - property

1554

1066

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

1555

1067

def LastApprovalRequest_dbus_property(self):

1556

return datetime_to_dbus(self.last_approval_request)

1068

if self.last_approval_request is None:

1069

return dbus.String("")

1070

return dbus.String(self.

1071

_datetime_to_dbus(self

1072

.last_approval_request))

1557

1073

1558

1074

# Timeout - property

1559

1075

@dbus_service_property(_interface, signature="t",

1561

1077

def Timeout_dbus_property(self, value=None):

1562

1078

if value is None: # get

1563

1079

return dbus.UInt64(self.timeout_milliseconds())

1564

old_timeout = self.timeout

1565

1080

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

1566

# Reschedule disabling

1567

if self.enabled:

1568

now = datetime.datetime.utcnow()

1569

self.expires += self.timeout - old_timeout

1570

if self.expires <= now:

1571

# The timeout has passed

1572

self.disable()

1573

else:

1574

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

1575

is None):

1576

return

1577

gobject.source_remove(self.disable_initiator_tag)

1578

self.disable_initiator_tag = (

1579

gobject.timeout_add(

1580

timedelta_to_milliseconds(self.expires - now),

1581

self.disable))

1582

1583

# ExtendedTimeout - property

1584

@dbus_service_property(_interface, signature="t",

1585

access="readwrite")

1586

def ExtendedTimeout_dbus_property(self, value=None):

1587

if value is None: # get

1588

return dbus.UInt64(self.extended_timeout_milliseconds())

1589

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

1081

# Emit D-Bus signal

1082

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

1083

dbus.UInt64(value, variant_level=1))

1084

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

1085

return

1086

# Reschedule timeout

1087

gobject.source_remove(self.disable_initiator_tag)

1088

self.disable_initiator_tag = None

1089

time_to_die = (self.

1090

_timedelta_to_milliseconds((self

1091

.last_checked_ok

1092

+ self.timeout)

1093

- datetime.datetime

1094

.utcnow()))

1095

if time_to_die <= 0:

1096

# The timeout has passed

1097

self.disable()

1098

else:

1099

self.disable_initiator_tag = (gobject.timeout_add

1100

(time_to_die, self.disable))

1590

1101

1591

1102

# Interval - property

1592

1103

@dbus_service_property(_interface, signature="t",

1595

1106

if value is None: # get

1596

1107

return dbus.UInt64(self.interval_milliseconds())

1597

1108

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

1109

# Emit D-Bus signal

1110

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

1111

dbus.UInt64(value, variant_level=1))

1598

1112

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

1599

1113

return

1600

if self.enabled:

1601

# Reschedule checker run

1602

gobject.source_remove(self.checker_initiator_tag)

1603

self.checker_initiator_tag = (gobject.timeout_add

1604

(value, self.start_checker))

1605

self.start_checker() # Start one now, too

1606

1114

# Reschedule checker run

1115

gobject.source_remove(self.checker_initiator_tag)

1116

self.checker_initiator_tag = (gobject.timeout_add

1117

(value, self.start_checker))

1118

self.start_checker() # Start one now, too

1119

1607

1120

# Checker - property

1608

1121

@dbus_service_property(_interface, signature="s",

1609

1122

access="readwrite")

1610

1123

def Checker_dbus_property(self, value=None):

1611

1124

if value is None: # get

1612

1125

return dbus.String(self.checker_command)

1613

self.checker_command = unicode(value)

1126

self.checker_command = value

1127

# Emit D-Bus signal

1128

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

1129

dbus.String(self.checker_command,

1130

variant_level=1))

1614

1131

1615

1132

# CheckerRunning - property

1616

1133

@dbus_service_property(_interface, signature="b",

1643

1160

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

1644

1161

if not self._pipe.recv():

1645

1162

raise KeyError()

1646

1163

1647

1164

def __getattribute__(self, name):

1648

if name == '_pipe':

1165

if(name == '_pipe'):

1649

1166

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

1650

1167

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

1651

1168

data = self._pipe.recv()

1656

1173

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

1657

1174

return self._pipe.recv()[1]

1658

1175

return func

1659

1176

1660

1177

def __setattr__(self, name, value):

1661

if name == '_pipe':

1178

if(name == '_pipe'):

1662

1179

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

1663

1180

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

1664

1181

1675

1192

unicode(self.client_address))

1676

1193

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

1677

1194

self.server.child_pipe.fileno())

1678

1195

1679

1196

session = (gnutls.connection

1680

1197

.ClientSession(self.request,

1681

1198

gnutls.connection

1682

1199

.X509Credentials()))

1683

1200

1684

1201

# Note: gnutls.connection.X509Credentials is really a

1685

1202

# generic GnuTLS certificate credentials object so long as

1686

1203

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

1687

1204

# here despite using OpenPGP certificates.

1688

1205

1689

1206

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

1690

1207

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

1691

1208

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

1697

1214

(gnutls.library.functions

1698

1215

.gnutls_priority_set_direct(session._c_object,

1699

1216

priority, None))

1700

1217

1701

1218

# Start communication using the Mandos protocol

1702

1219

# Get protocol number

1703

1220

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

1704

1221

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

1705

1222

try:

1706

1223

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

1707

raise RuntimeError(line)

1224

raise RuntimeError

1708

1225

except (ValueError, IndexError, RuntimeError) as error:

1709

1226

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

1710

1227

return

1711

1228

1712

1229

# Start GnuTLS connection

1713

1230

try:

1714

1231

session.handshake()

1718

1235

# established. Just abandon the request.

1719

1236

return

1720

1237

logger.debug("Handshake succeeded")

1721

1238

1722

1239

approval_required = False

1723

1240

try:

1724

1241

try:

1729

1246

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

1730

1247

return

1731

1248

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

1732

1249

1733

1250

try:

1734

1251

client = ProxyClient(child_pipe, fpr,

1735

1252

self.client_address)

1743

1260

1744

1261

while True:

1745

1262

if not client.enabled:

1746

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

1263

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

1747

1264

client.name)

1748

1265

if self.server.use_dbus:

1749

1266

# Emit D-Bus signal

1750

client.Rejected("Disabled")

1267

client.Rejected("Disabled")

1751

1268

return

1752

1269

1753

if client.approved or not client.approval_delay:

1270

if client._approved or not client.approval_delay:

1754

1271

#We are approved or approval is disabled

1755

1272

break

1756

elif client.approved is None:

1273

elif client._approved is None:

1757

1274

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

1758

1275

client.name)

1759

1276

if self.server.use_dbus:

1770

1287

return

1771

1288

1772

1289

#wait until timeout or approved

1290

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

1773

1291

time = datetime.datetime.now()

1774

1292

client.changedstate.acquire()

1775

client.changedstate.wait(

1776

float(timedelta_to_milliseconds(delay)

1777

/ 1000))

1293

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

1778

1294

client.changedstate.release()

1779

1295

time2 = datetime.datetime.now()

1780

1296

if (time2 - time) >= delay:

1796

1312

try:

1797

1313

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

1798

1314

except gnutls.errors.GNUTLSError as error:

1799

logger.warning("gnutls send failed",

1800

exc_info=error)

1315

logger.warning("gnutls send failed")

1801

1316

return

1802

1317

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

1803

1318

sent, len(client.secret)

1804

1319

- (sent_size + sent))

1805

1320

sent_size += sent

1806

1321

1807

1322

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

1808

# bump the timeout using extended_timeout

1809

client.bump_timeout(client.extended_timeout)

1323

# bump the timeout as if seen

1324

client.checked_ok()

1810

1325

if self.server.use_dbus:

1811

1326

# Emit D-Bus signal

1812

1327

client.GotSecret()

1817

1332

try:

1818

1333

session.bye()

1819

1334

except gnutls.errors.GNUTLSError as error:

1820

logger.warning("GnuTLS bye failed",

1821

exc_info=error)

1335

logger.warning("GnuTLS bye failed")

1822

1336

1823

1337

@staticmethod

1824

1338

def peer_certificate(session):

1880

1394

# Convert the buffer to a Python bytestring

1881

1395

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

1882

1396

# Convert the bytestring to hexadecimal notation

1883

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

1397

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

1884

1398

return hex_fpr

1885

1399

1886

1400

1889

1403

def sub_process_main(self, request, address):

1890

1404

try:

1891

1405

self.finish_request(request, address)

1892

except Exception:

1406

except:

1893

1407

self.handle_error(request, address)

1894

1408

self.close_request(request)

1895

1409

1896

1410

def process_request(self, request, address):

1897

1411

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

1898

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

1899

args = (request, address))

1900

proc.start()

1901

return proc

1902

1412

multiprocessing.Process(target = self.sub_process_main,

1413

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

1903

1414

1904

1415

class MultiprocessingMixInWithPipe(MultiprocessingMixIn, object):

1905

1416

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

1909

1420

This function creates a new pipe in self.pipe

1910

1421

"""

1911

1422

parent_pipe, self.child_pipe = multiprocessing.Pipe()

1912

1913

proc = MultiprocessingMixIn.process_request(self, request,

1914

client_address)

1423

1424

super(MultiprocessingMixInWithPipe,

1425

self).process_request(request, client_address)

1915

1426

self.child_pipe.close()

1916

self.add_pipe(parent_pipe, proc)

1917

1918

def add_pipe(self, parent_pipe, proc):

1427

self.add_pipe(parent_pipe)

1428

1429

def add_pipe(self, parent_pipe):

1919

1430

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

1920

raise NotImplementedError()

1921

1431

raise NotImplementedError

1922

1432

1923

1433

class IPv6_TCPServer(MultiprocessingMixInWithPipe,

1924

1434

socketserver.TCPServer, object):

1930

1440

use_ipv6: Boolean; to use IPv6 or not

1931

1441

"""

1932

1442

def __init__(self, server_address, RequestHandlerClass,

1933

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

1934

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

1935

creating a new one with socket.socket().

1936

"""

1443

interface=None, use_ipv6=True):

1937

1444

self.interface = interface

1938

1445

if use_ipv6:

1939

1446

self.address_family = socket.AF_INET6

1940

if socketfd is not None:

1941

# Save the file descriptor

1942

self.socketfd = socketfd

1943

# Save the original socket.socket() function

1944

self.socket_socket = socket.socket

1945

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

1946

#

1947

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

1948

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

1949

# patching socket.socket.)

1950

#

1951

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

1952

@functools.wraps(socket.socket)

1953

def socket_wrapper(*args, **kwargs):

1954

# Restore original function so subsequent calls are

1955

# not affected.

1956

socket.socket = self.socket_socket

1957

del self.socket_socket

1958

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

1959

# saved file descriptor.

1960

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

1961

# Replace socket.socket() function with wrapper

1962

socket.socket = socket_wrapper

1963

# The socketserver.TCPServer.__init__ will call

1964

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

1965

# socket_wrapper(), if socketfd was set.

1966

1447

socketserver.TCPServer.__init__(self, server_address,

1967

1448

RequestHandlerClass)

1968

1969

1449

def server_bind(self):

1970

1450

"""This overrides the normal server_bind() function

1971

1451

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

1979

1459

try:

1980

1460

self.socket.setsockopt(socket.SOL_SOCKET,

1981

1461

SO_BINDTODEVICE,

1982

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

1462

str(self.interface

1463

+ '\0'))

1983

1464

except socket.error as error:

1984

if error.errno == errno.EPERM:

1985

logger.error("No permission to bind to"

1986

" interface %s", self.interface)

1987

elif error.errno == errno.ENOPROTOOPT:

1465

if error[0] == errno.EPERM:

1466

logger.error("No permission to"

1467

" bind to interface %s",

1468

self.interface)

1469

elif error[0] == errno.ENOPROTOOPT:

1988

1470

logger.error("SO_BINDTODEVICE not available;"

1989

1471

" cannot bind to interface %s",

1990

1472

self.interface)

1991

elif error.errno == errno.ENODEV:

1992

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

1993

" cannot bind", self.interface)

1994

1473

else:

1995

1474

raise

1996

1475

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

1999

1478

if self.address_family == socket.AF_INET6:

2000

1479

any_address = "::" # in6addr_any

2001

1480

else:

2002

any_address = "0.0.0.0" # INADDR_ANY

1481

any_address = socket.INADDR_ANY

2003

1482

self.server_address = (any_address,

2004

1483

self.server_address[1])

2005

1484

elif not self.server_address[1]:

2026

1505

"""

2027

1506

def __init__(self, server_address, RequestHandlerClass,

2028

1507

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

2029

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

1508

gnutls_priority=None, use_dbus=True):

2030

1509

self.enabled = False

2031

1510

self.clients = clients

2032

1511

if self.clients is None:

2033

self.clients = {}

1512

self.clients = set()

2034

1513

self.use_dbus = use_dbus

2035

1514

self.gnutls_priority = gnutls_priority

2036

1515

IPv6_TCPServer.__init__(self, server_address,

2037

1516

RequestHandlerClass,

2038

1517

interface = interface,

2039

use_ipv6 = use_ipv6,

2040

socketfd = socketfd)

1518

use_ipv6 = use_ipv6)

2041

1519

def server_activate(self):

2042

1520

if self.enabled:

2043

1521

return socketserver.TCPServer.server_activate(self)

2044

2045

1522

def enable(self):

2046

1523

self.enabled = True

2047

2048

def add_pipe(self, parent_pipe, proc):

1524

def add_pipe(self, parent_pipe):

2049

1525

# Call "handle_ipc" for both data and EOF events

2050

1526

gobject.io_add_watch(parent_pipe.fileno(),

2051

1527

gobject.IO_IN | gobject.IO_HUP,

2052

1528

functools.partial(self.handle_ipc,

2053

parent_pipe =

2054

parent_pipe,

2055

proc = proc))

2056

1529

parent_pipe = parent_pipe))

1530

2057

1531

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

2058

proc = None, client_object=None):

2059

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

2060

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

2061

# Wait for other process to exit

2062

proc.join()

1532

client_object=None):

1533

condition_names = {

1534

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

1535

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

1536

# blocking).

1537

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

1538

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

1539

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

1540

# broken, usually for pipes and

1541

# sockets).

1542

}

1543

conditions_string = ' | '.join(name

1544

for cond, name in

1545

condition_names.iteritems()

1546

if cond & condition)

1547

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

1548

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

2063

1549

return False

2064

1550

2065

1551

# Read a request from the child

2070

1556

fpr = request[1]

2071

1557

address = request[2]

2072

1558

2073

for c in self.clients.itervalues():

1559

for c in self.clients:

2074

1560

if c.fingerprint == fpr:

2075

1561

client = c

2076

1562

break

2077

1563

else:

2078

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

2079

"dress: %s", fpr, address)

1564

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

1565

"dress: %s", fpr, address)

2080

1566

if self.use_dbus:

2081

1567

# Emit D-Bus signal

2082

mandos_dbus_service.ClientNotFound(fpr,

2083

address[0])

1568

mandos_dbus_service.ClientNotFound(fpr, address[0])

2084

1569

parent_pipe.send(False)

2085

1570

return False

2086

1571

2087

1572

gobject.io_add_watch(parent_pipe.fileno(),

2088

1573

gobject.IO_IN | gobject.IO_HUP,

2089

1574

functools.partial(self.handle_ipc,

2090

parent_pipe =

2091

parent_pipe,

2092

proc = proc,

2093

client_object =

2094

client))

1575

parent_pipe = parent_pipe,

1576

client_object = client))

2095

1577

parent_pipe.send(True)

2096

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

2097

# same fileno

1578

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

2098

1579

return False

2099

1580

if command == 'funcall':

2100

1581

funcname = request[1]

2101

1582

args = request[2]

2102

1583

kwargs = request[3]

2103

1584

2104

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

2105

funcname)(*args,

2106

**kwargs)))

2107

1585

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

1586

2108

1587

if command == 'getattr':

2109

1588

attrname = request[1]

2110

1589

if callable(client_object.__getattribute__(attrname)):

2111

1590

parent_pipe.send(('function',))

2112

1591

else:

2113

parent_pipe.send(('data', client_object

2114

.__getattribute__(attrname)))

1592

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

2115

1593

2116

1594

if command == 'setattr':

2117

1595

attrname = request[1]

2118

1596

value = request[2]

2119

1597

setattr(client_object, attrname, value)

2120

1598

2121

1599

return True

2122

1600

2123

1601

2124

def rfc3339_duration_to_delta(duration):

2125

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

2126

2127

>>> rfc3339_duration_to_delta("P7D")

2128

datetime.timedelta(7)

2129

>>> rfc3339_duration_to_delta("PT60S")

2130

datetime.timedelta(0, 60)

2131

>>> rfc3339_duration_to_delta("PT60M")

2132

datetime.timedelta(0, 3600)

2133

>>> rfc3339_duration_to_delta("PT24H")

2134

datetime.timedelta(1)

2135

>>> rfc3339_duration_to_delta("P1W")

2136

datetime.timedelta(7)

2137

>>> rfc3339_duration_to_delta("PT5M30S")

2138

datetime.timedelta(0, 330)

2139

>>> rfc3339_duration_to_delta("P1DT3M20S")

2140

datetime.timedelta(1, 200)

2141

"""

2142

2143

# Parsing an RFC 3339 duration with regular expressions is not

2144

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

2145

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

2146

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

2147

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

2148

# avoid excessive use of external libraries.

2149

2150

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

2151

Token = collections.namedtuple("Token",

2152

("regexp", # To match token; if

2153

# "value" is not None,

2154

# must have a "group"

2155

# containing digits

2156

"value", # datetime.timedelta or

2157

# None

2158

"followers")) # Tokens valid after

2159

# this token

2160

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

2161

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

2162

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

2163

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

2164

datetime.timedelta(seconds=1),

2165

frozenset((token_end,)))

2166

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

2167

datetime.timedelta(minutes=1),

2168

frozenset((token_second, token_end)))

2169

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

2170

datetime.timedelta(hours=1),

2171

frozenset((token_minute, token_end)))

2172

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

2173

None,

2174

frozenset((token_hour, token_minute,

2175

token_second)))

2176

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

2177

datetime.timedelta(days=1),

2178

frozenset((token_time, token_end)))

2179

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

2180

datetime.timedelta(weeks=4),

2181

frozenset((token_day, token_end)))

2182

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

2183

datetime.timedelta(weeks=52),

2184

frozenset((token_month, token_end)))

2185

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

2186

datetime.timedelta(weeks=1),

2187

frozenset((token_end,)))

2188

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

2189

frozenset((token_year, token_month,

2190

token_day, token_time,

2191

token_week))),

2192

# Define starting values

2193

value = datetime.timedelta() # Value so far

2194

found_token = None

2195

followers = frozenset(token_duration,) # Following valid tokens

2196

s = duration # String left to parse

2197

# Loop until end token is found

2198

while found_token is not token_end:

2199

# Search for any currently valid tokens

2200

for token in followers:

2201

match = token.regexp.match(s)

2202

if match is not None:

2203

# Token found

2204

if token.value is not None:

2205

# Value found, parse digits

2206

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

2207

# Add to value so far

2208

value += factor * token.value

2209

# Strip token from string

2210

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

2211

# Go to found token

2212

found_token = token

2213

# Set valid next tokens

2214

followers = found_token.followers

2215

break

2216

else:

2217

# No currently valid tokens were found

2218

raise ValueError("Invalid RFC 3339 duration")

2219

# End token found

2220

return value

2221

2222

2223

1602

def string_to_delta(interval):

2224

1603

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

2225

1604

2236

1615

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

2237

1616

datetime.timedelta(0, 330)

2238

1617

"""

2239

2240

try:

2241

return rfc3339_duration_to_delta(interval)

2242

except ValueError:

2243

pass

2244

2245

1618

timevalue = datetime.timedelta(0)

2246

1619

for s in interval.split():

2247

1620

try:

2258

1631

elif suffix == "w":

2259

1632

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

2260

1633

else:

2261

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

2262

.format(suffix))

2263

except IndexError as e:

1634

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

1635

except (ValueError, IndexError) as e:

2264

1636

raise ValueError(*(e.args))

2265

1637

timevalue += delta

2266

1638

return timevalue

2267

1639

2268

1640

1641

def if_nametoindex(interface):

1642

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

1643

1644

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

1645

global if_nametoindex

1646

try:

1647

if_nametoindex = (ctypes.cdll.LoadLibrary

1648

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

1649

.if_nametoindex)

1650

except (OSError, AttributeError):

1651

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

1652

def if_nametoindex(interface):

1653

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

1654

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

1655

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

1656

ifreq = fcntl.ioctl(s, SIOCGIFINDEX,

1657

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

1658

interface))

1659

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

1660

ifreq[16:20])[0]

1661

return interface_index

1662

return if_nametoindex(interface)

1663

1664

2269

1665

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

2270

1666

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

2271

1667

2279

1675

sys.exit()

2280

1676

if not noclose:

2281

1677

# Close all standard open file descriptors

2282

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

1678

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

2283

1679

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

2284

1680

raise OSError(errno.ENODEV,

2285

"{0} not a character device"

2286

.format(os.devnull))

1681

"%s not a character device"

1682

% os.path.devnull)

2287

1683

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

2288

1684

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

2289

1685

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

2298

1694

2299

1695

parser = argparse.ArgumentParser()

2300

1696

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

2301

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

1697

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

2302

1698

help="show version number and exit")

2303

1699

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

2304

1700

help="Bind to interface IF")

2310

1706

help="Run self-test")

2311

1707

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

2312

1708

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

2313

" to terminal", default=None)

1709

" to terminal")

2314

1710

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

2315

1711

help="Debug level for stdout output")

2316

1712

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

2323

1719

" files")

2324

1720

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

2325

1721

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

2326

" system bus interface", default=None)

1722

" system bus interface")

2327

1723

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

2328

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

2329

default=None)

2330

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

2331

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

2332

" state", default=None)

2333

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

2334

help="Specify a file descriptor to a network"

2335

" socket to use instead of creating one")

2336

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

2337

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

2338

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

2339

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

2340

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

2341

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

2342

default=None)

2343

1724

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

2344

1725

options = parser.parse_args()

2345

1726

2346

1727

if options.check:

2347

1728

import doctest

2348

fail_count, test_count = doctest.testmod()

2349

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

1729

doctest.testmod()

1730

sys.exit()

2350

1731

2351

1732

# Default values for config file for server-global settings

2352

1733

server_defaults = { "interface": "",

2354

1735

"port": "",

2355

1736

"debug": "False",

2356

1737

"priority":

2357

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

1738

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

2358

1739

"servicename": "Mandos",

2359

1740

"use_dbus": "True",

2360

1741

"use_ipv6": "True",

2361

1742

"debuglevel": "",

2362

"restore": "True",

2363

"socket": "",

2364

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

2365

"foreground": "False",

2366

"zeroconf": "True",

2367

1743

}

2368

1744

2369

1745

# Parse config file for server-global settings

2374

1750

# Convert the SafeConfigParser object to a dict

2375

1751

server_settings = server_config.defaults()

2376

1752

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

2377

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

1753

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

2378

1754

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

2379

1755

option)

2380

1756

if server_settings["port"]:

2381

1757

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

2382

1758

"port")

2383

if server_settings["socket"]:

2384

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

2385

"socket")

2386

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

2387

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

2388

# happen with a supplied network socket.

2389

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

2390

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

2391

["socket"])

2392

1759

del server_config

2393

1760

2394

1761

# Override the settings from the config file with command line

2395

1762

# options, if set.

2396

1763

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

2397

1764

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

2398

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

2399

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

1765

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

2400

1766

value = getattr(options, option)

2401

1767

if value is not None:

2402

1768

server_settings[option] = value

2405

1771

for option in server_settings.keys():

2406

1772

if type(server_settings[option]) is str:

2407

1773

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

2408

# Force all boolean options to be boolean

2409

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

2410

"foreground", "zeroconf"):

2411

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

2412

# Debug implies foreground

2413

if server_settings["debug"]:

2414

server_settings["foreground"] = True

2415

1774

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

2416

1775

2417

1776

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

2418

1777

2419

if (not server_settings["zeroconf"] and

2420

not (server_settings["port"]

2421

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

2422

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

2423

" Zeroconf")

2424

2425

1778

# For convenience

2426

1779

debug = server_settings["debug"]

2427

1780

debuglevel = server_settings["debuglevel"]

2428

1781

use_dbus = server_settings["use_dbus"]

2429

1782

use_ipv6 = server_settings["use_ipv6"]

2430

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

2431

stored_state_file)

2432

foreground = server_settings["foreground"]

2433

zeroconf = server_settings["zeroconf"]

2434

2435

if debug:

2436

initlogger(debug, logging.DEBUG)

2437

else:

2438

if not debuglevel:

2439

initlogger(debug)

2440

else:

2441

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

2442

initlogger(debug, level)

2443

1783

2444

1784

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

2445

1785

syslogger.setFormatter(logging.Formatter

2446

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

2447

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

2448

.format(server_settings

2449

["servicename"])))

1786

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

1787

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

1788

% server_settings["servicename"]))

2450

1789

2451

1790

# Parse config file with clients

2452

client_config = configparser.SafeConfigParser(Client

2453

.client_defaults)

1791

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

1792

"interval": "5m",

1793

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

1794

"host": "",

1795

"approval_delay": "0s",

1796

"approval_duration": "1s",

1797

}

1798

client_config = configparser.SafeConfigParser(client_defaults)

2454

1799

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

2455

1800

"clients.conf"))

2456

1801

2457

1802

global mandos_dbus_service

2458

1803

mandos_dbus_service = None

2459

1804

2460

socketfd = None

2461

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

2462

socketfd = server_settings["socket"]

2463

1805

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

2464

1806

server_settings["port"]),

2465

1807

ClientHandler,

2468

1810

use_ipv6=use_ipv6,

2469

1811

gnutls_priority=

2470

1812

server_settings["priority"],

2471

use_dbus=use_dbus,

2472

socketfd=socketfd)

2473

if not foreground:

2474

pidfilename = "/run/mandos.pid"

2475

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

2476

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

2477

pidfile = None

1813

use_dbus=use_dbus)

1814

if not debug:

1815

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

2478

1816

try:

2479

1817

pidfile = open(pidfilename, "w")

2480

except IOError as e:

2481

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

2482

exc_info=e)

1818

except IOError:

1819

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

2483

1820

2484

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

1821

try:

1822

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

1823

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

1824

except KeyError:

2485

1825

try:

2486

uid = pwd.getpwnam(name).pw_uid

2487

gid = pwd.getpwnam(name).pw_gid

2488

break

1826

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

1827

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

2489

1828

except KeyError:

2490

continue

2491

else:

2492

uid = 65534

2493

gid = 65534

1829

try:

1830

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

1831

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

1832

except KeyError:

1833

uid = 65534

1834

gid = 65534

2494

1835

try:

2495

1836

os.setgid(gid)

2496

1837

os.setuid(uid)

2497

1838

except OSError as error:

2498

if error.errno != errno.EPERM:

2499

raise

1839

if error[0] != errno.EPERM:

1840

raise error

2500

1841

1842

if not debug and not debuglevel:

1843

syslogger.setLevel(logging.WARNING)

1844

console.setLevel(logging.WARNING)

1845

if debuglevel:

1846

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

1847

syslogger.setLevel(level)

1848

console.setLevel(level)

1849

2501

1850

if debug:

2502

1851

# Enable all possible GnuTLS debugging

2503

1852

2513

1862

.gnutls_global_set_log_function(debug_gnutls))

2514

1863

2515

1864

# Redirect stdin so all checkers get /dev/null

2516

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

1865

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

2517

1866

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

2518

1867

if null > 2:

2519

1868

os.close(null)

1869

else:

1870

# No console logging

1871

logger.removeHandler(console)

2520

1872

2521

1873

# Need to fork before connecting to D-Bus

2522

if not foreground:

1874

if not debug:

2523

1875

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

2524

1876

daemon()

2525

1877

2526

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

2527

# need to inform gobject that threads will be used.

2528

gobject.threads_init()

2529

2530

1878

global main_loop

2531

1879

# From the Avahi example code

2532

DBusGMainLoop(set_as_default=True)

1880

DBusGMainLoop(set_as_default=True )

2533

1881

main_loop = gobject.MainLoop()

2534

1882

bus = dbus.SystemBus()

2535

1883

# End of Avahi example code

2536

1884

if use_dbus:

2537

1885

try:

2538

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

1886

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

2539

1887

bus, do_not_queue=True)

2540

old_bus_name = (dbus.service.BusName

2541

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

2542

do_not_queue=True))

2543

1888

except dbus.exceptions.NameExistsException as e:

2544

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

1889

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

2545

1890

use_dbus = False

2546

1891

server_settings["use_dbus"] = False

2547

1892

tcp_server.use_dbus = False

2548

if zeroconf:

2549

protocol = avahi.PROTO_INET6 if use_ipv6 else avahi.PROTO_INET

2550

service = AvahiServiceToSyslog(name =

2551

server_settings["servicename"],

2552

servicetype = "_mandos._tcp",

2553

protocol = protocol, bus = bus)

2554

if server_settings["interface"]:

2555

service.interface = (if_nametoindex

2556

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

1893

protocol = avahi.PROTO_INET6 if use_ipv6 else avahi.PROTO_INET

1894

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

1895

servicetype = "_mandos._tcp",

1896

protocol = protocol, bus = bus)

1897

if server_settings["interface"]:

1898

service.interface = (if_nametoindex

1899

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

2557

1900

2558

1901

global multiprocessing_manager

2559

1902

multiprocessing_manager = multiprocessing.Manager()

2561

1904

client_class = Client

2562

1905

if use_dbus:

2563

1906

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

2564

2565

client_settings = Client.config_parser(client_config)

2566

old_client_settings = {}

2567

clients_data = {}

2568

2569

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

2570

global wnull

2571

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

2572

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

2573

# mode

2574

if debug or not foreground:

2575

wnull.close()

2576

2577

# Get client data and settings from last running state.

2578

if server_settings["restore"]:

2579

try:

2580

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

2581

clients_data, old_client_settings = (pickle.load

2582

(stored_state))

2583

os.remove(stored_state_path)

2584

except IOError as e:

2585

if e.errno == errno.ENOENT:

2586

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

2587

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

2588

else:

2589

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

2590

exc_info=e)

2591

raise

2592

except EOFError as e:

2593

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

2594

"EOFError:", exc_info=e)

2595

2596

with PGPEngine() as pgp:

2597

for client_name, client in clients_data.iteritems():

2598

# Skip removed clients

2599

if client_name not in client_settings:

2600

continue

2601

2602

# Decide which value to use after restoring saved state.

2603

# We have three different values: Old config file,

2604

# new config file, and saved state.

2605

# New config value takes precedence if it differs from old

2606

# config value, otherwise use saved state.

2607

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

2608

try:

2609

# For each value in new config, check if it

2610

# differs from the old config value (Except for

2611

# the "secret" attribute)

2612

if (name != "secret" and

2613

value != old_client_settings[client_name]

2614

[name]):

2615

client[name] = value

2616

except KeyError:

2617

pass

2618

2619

# Clients who has passed its expire date can still be

2620

# enabled if its last checker was successful. Clients

2621

# whose checker succeeded before we stored its state is

2622

# assumed to have successfully run all checkers during

2623

# downtime.

2624

if client["enabled"]:

2625

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

2626

if not client["last_checked_ok"]:

2627

logger.warning(

2628

"disabling client {0} - Client never "

2629

"performed a successful checker"

2630

.format(client_name))

2631

client["enabled"] = False

2632

elif client["last_checker_status"] != 0:

2633

logger.warning(

2634

"disabling client {0} - Client "

2635

"last checker failed with error code {1}"

2636

.format(client_name,

2637

client["last_checker_status"]))

2638

client["enabled"] = False

2639

else:

2640

client["expires"] = (datetime.datetime

2641

.utcnow()

2642

+ client["timeout"])

2643

logger.debug("Last checker succeeded,"

2644

" keeping {0} enabled"

2645

.format(client_name))

1907

def client_config_items(config, section):

1908

special_settings = {

1909

"approved_by_default":

1910

lambda: config.getboolean(section,

1911

"approved_by_default"),

1912

}

1913

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

2646

1914

try:

2647

client["secret"] = (

2648

pgp.decrypt(client["encrypted_secret"],

2649

client_settings[client_name]

2650

["secret"]))

2651

except PGPError:

2652

# If decryption fails, we use secret from new settings

2653

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

2654

.format(client_name))

2655

client["secret"] = (

2656

client_settings[client_name]["secret"])

2657

2658

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

2659

for client_name in (set(old_client_settings)

2660

- set(client_settings)):

2661

del clients_data[client_name]

2662

for client_name in (set(client_settings)

2663

- set(old_client_settings)):

2664

clients_data[client_name] = client_settings[client_name]

2665

2666

# Create all client objects

2667

for client_name, client in clients_data.iteritems():

2668

tcp_server.clients[client_name] = client_class(

2669

name = client_name, settings = client,

2670

server_settings = server_settings)

2671

1915

yield (name, special_settings[name]())

1916

except KeyError:

1917

yield (name, value)

1918

1919

tcp_server.clients.update(set(

1920

client_class(name = section,

1921

config= dict(client_config_items(

1922

client_config, section)))

1923

for section in client_config.sections()))

2672

1924

if not tcp_server.clients:

2673

1925

logger.warning("No clients defined")

2674

2675

if not foreground:

2676

if pidfile is not None:

2677

try:

2678

with pidfile:

2679

pid = os.getpid()

2680

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

2681

except IOError:

2682

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

2683

pidfilename, pid)

2684

del pidfile

1926

1927

if not debug:

1928

try:

1929

with pidfile:

1930

pid = os.getpid()

1931

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

1932

del pidfile

1933

except IOError:

1934

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

1935

pidfilename, pid)

1936

except NameError:

1937

# "pidfile" was never created

1938

pass

2685

1939

del pidfilename

2686

1940

1941

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

1942

2687

1943

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

2688

1944

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

2689

1945

2690

1946

if use_dbus:

2691

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

2692

"se.bsnet.fukt.Mandos"})

2693

class MandosDBusService(DBusObjectWithProperties):

1947

class MandosDBusService(dbus.service.Object):

2694

1948

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

2695

1949

def __init__(self):

2696

1950

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

2697

_interface = "se.recompile.Mandos"

2698

2699

@dbus_interface_annotations(_interface)

2700

def _foo(self):

2701

return { "org.freedesktop.DBus.Property"

2702

".EmitsChangedSignal":

2703

"false"}

1951

_interface = "se.bsnet.fukt.Mandos"

2704

1952

2705

1953

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

2706

1954

def ClientAdded(self, objpath):

2721

1969

def GetAllClients(self):

2722

1970

"D-Bus method"

2723

1971

return dbus.Array(c.dbus_object_path

2724

for c in

2725

tcp_server.clients.itervalues())

1972

for c in tcp_server.clients)

2726

1973

2727

1974

@dbus.service.method(_interface,

2728

1975

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

2730

1977

"D-Bus method"

2731

1978

return dbus.Dictionary(

2732

1979

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

2733

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

1980

for c in tcp_server.clients),

2734

1981

signature="oa{sv}")

2735

1982

2736

1983

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

2737

1984

def RemoveClient(self, object_path):

2738

1985

"D-Bus method"

2739

for c in tcp_server.clients.itervalues():

1986

for c in tcp_server.clients:

2740

1987

if c.dbus_object_path == object_path:

2741

del tcp_server.clients[c.name]

1988

tcp_server.clients.remove(c)

2742

1989

c.remove_from_connection()

2743

1990

# Don't signal anything except ClientRemoved

2744

1991

c.disable(quiet=True)

2753

2000

2754

2001

def cleanup():

2755

2002

"Cleanup function; run on exit"

2756

if zeroconf:

2757

service.cleanup()

2758

2759

multiprocessing.active_children()

2760

wnull.close()

2761

if not (tcp_server.clients or client_settings):

2762

return

2763

2764

# Store client before exiting. Secrets are encrypted with key

2765

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

2766

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

2767

clients = {}

2768

with PGPEngine() as pgp:

2769

for client in tcp_server.clients.itervalues():

2770

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

2771

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

2772

key)

2773

client_dict = {}

2774

2775

# A list of attributes that can not be pickled

2776

# + secret.

2777

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

2778

"checker", "server_settings"))

2779

for name, typ in (inspect.getmembers

2780

(dbus.service.Object)):

2781

exclude.add(name)

2782

2783

client_dict["encrypted_secret"] = (client

2784

.encrypted_secret)

2785

for attr in client.client_structure:

2786

if attr not in exclude:

2787

client_dict[attr] = getattr(client, attr)

2788

2789

clients[client.name] = client_dict

2790

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

2791

2792

try:

2793

with (tempfile.NamedTemporaryFile

2794

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

2795

dir=os.path.dirname(stored_state_path),

2796

delete=False)) as stored_state:

2797

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

2798

tempname=stored_state.name

2799

os.rename(tempname, stored_state_path)

2800

except (IOError, OSError) as e:

2801

if not debug:

2802

try:

2803

os.remove(tempname)

2804

except NameError:

2805

pass

2806

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

2807

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

2808

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

2809

else:

2810

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

2811

exc_info=e)

2812

raise

2813

2814

# Delete all clients, and settings from config

2003

service.cleanup()

2004

2815

2005

while tcp_server.clients:

2816

name, client = tcp_server.clients.popitem()

2006

client = tcp_server.clients.pop()

2817

2007

if use_dbus:

2818

2008

client.remove_from_connection()

2009

client.disable_hook = None

2819

2010

# Don't signal anything except ClientRemoved

2820

2011

client.disable(quiet=True)

2821

2012

if use_dbus:

2822

2013

# Emit D-Bus signal

2823

mandos_dbus_service.ClientRemoved(client

2824

.dbus_object_path,

2014

mandos_dbus_service.ClientRemoved(client.dbus_object_path,

2825

2015

client.name)

2826

client_settings.clear()

2827

2016

2828

2017

atexit.register(cleanup)

2829

2018

2830

for client in tcp_server.clients.itervalues():

2019

for client in tcp_server.clients:

2831

2020

if use_dbus:

2832

2021

# Emit D-Bus signal

2833

2022

mandos_dbus_service.ClientAdded(client.dbus_object_path)

2834

# Need to initiate checking of clients

2835

if client.enabled:

2836

client.init_checker()

2023

client.enable()

2837

2024

2838

2025

tcp_server.enable()

2839

2026

tcp_server.server_activate()

2840

2027

2841

2028

# Find out what port we got

2842

if zeroconf:

2843

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

2029

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

2844

2030

if use_ipv6:

2845

2031

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

2846

" flowinfo %d, scope_id %d",

2847

*tcp_server.socket.getsockname())

2032

" flowinfo %d, scope_id %d"

2033

% tcp_server.socket.getsockname())

2848

2034

else: # IPv4

2849

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

2850

*tcp_server.socket.getsockname())

2035

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

2036

% tcp_server.socket.getsockname())

2851

2037

2852

2038

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

2853

2039

2854

2040

try:

2855

if zeroconf:

2856

# From the Avahi example code

2857

try:

2858

service.activate()

2859

except dbus.exceptions.DBusException as error:

2860

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

2861

cleanup()

2862

sys.exit(1)

2863

# End of Avahi example code

2041

# From the Avahi example code

2042

try:

2043

service.activate()

2044

except dbus.exceptions.DBusException as error:

2045

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

2046

cleanup()

2047

sys.exit(1)

2048

# End of Avahi example code

2864

2049

2865

2050

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

2866

2051

lambda *args, **kwargs:

2870

2055

logger.debug("Starting main loop")

2871

2056

main_loop.run()

2872

2057

except AvahiError as error:

2873

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

2058

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

2874

2059

cleanup()

2875

2060

sys.exit(1)

2876

2061

except KeyboardInterrupt: