/mandos/trunk : revision 24.1.186

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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 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 = "1.6.5"

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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 = "1.3.1"

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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.entry_group_state_changed_match is not None:

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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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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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dbus.exceptions.DBusException) as e:

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

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else:

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

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def activate(self):

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

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if self.server is None:

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self.server_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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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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extended_timeout: extra long timeout when password 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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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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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 _timedelta_to_milliseconds(self.extended_timeout)

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def interval_milliseconds(self):

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"Return the 'interval' attribute in milliseconds"

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return timedelta_to_milliseconds(self.interval)

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return _timedelta_to_milliseconds(self.interval)

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def approval_delay_milliseconds(self):

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return 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 _timedelta_to_milliseconds(self.approval_delay)

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

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

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

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attribute."""

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self.name = name

535

if server_settings is None:

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server_settings = {}

537

self.server_settings = server_settings

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# adding all client settings

539

for setting, value in settings.iteritems():

540

setattr(self, setting, value)

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if self.enabled:

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if not hasattr(self, "last_enabled"):

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self.last_enabled = datetime.datetime.utcnow()

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if not hasattr(self, "expires"):

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

547

+ self.timeout)

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else:

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self.last_enabled = None

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self.expires = None

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if config is None:

339

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

344

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

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.replace(" ", ""))

556

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

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

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datetime.datetime.utcnow())

559

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# attributes specific for this server instance

347

if "secret" in config:

348

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

349

elif "secfile" in config:

350

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

351

(config["secfile"])),

352

"rb") as secfile:

353

self.secret = secfile.read()

354

else:

355

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

356

% self.name)

357

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

358

self.created = datetime.datetime.utcnow()

359

self.enabled = False

360

self.last_approval_request = None

361

self.last_enabled = None

362

self.last_checked_ok = None

363

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

364

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

365

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

366

self.disable_hook = disable_hook

561

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self.checker = None

562

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self.checker_initiator_tag = None

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self.disable_initiator_tag = None

370

self.expires = None

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self.checker_callback_tag = None

372

self.checker_command = config["checker"]

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self.current_checker_command = None

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self.approved = None

374

self.last_connect = None

375

self._approved = None

376

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

377

True)

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self.approvals_pending = 0

568

self.changedstate = (multiprocessing_manager

569

.Condition(multiprocessing_manager

570

.Lock()))

571

self.client_structure = [attr for attr in

572

self.__dict__.iterkeys()

573

if not attr.startswith("_")]

574

self.client_structure.append("client_structure")

575

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

577

lambda obj:

578

isinstance(obj,

579

property)):

580

if not name.startswith("_"):

581

self.client_structure.append(name)

379

self.approval_delay = string_to_delta(

380

config["approval_delay"])

381

self.approval_duration = string_to_delta(

382

config["approval_duration"])

383

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

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583

# Send notice to process children that client state has changed

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385

def send_changedstate(self):

585

with self.changedstate:

586

self.changedstate.notify_all()

587

386

self.changedstate.acquire()

387

self.changedstate.notify_all()

388

self.changedstate.release()

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def enable(self):

589

391

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

590

392

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

591

393

# Already enabled

592

394

return

395

self.send_changedstate()

396

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

397

# and every interval from then on.

398

self.checker_initiator_tag = (gobject.timeout_add

399

(self.interval_milliseconds(),

400

self.start_checker))

401

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

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402

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

403

self.disable_initiator_tag = (gobject.timeout_add

404

(self.timeout_milliseconds(),

405

self.disable))

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self.enabled = True

595

407

self.last_enabled = datetime.datetime.utcnow()

596

self.init_checker()

597

self.send_changedstate()

408

# Also start a new checker *right now*.

409

self.start_checker()

598

410

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411

def disable(self, quiet=True):

600

412

"""Disable this client."""

601

413

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

602

414

return False

603

415

if not quiet:

416

self.send_changedstate()

417

if not quiet:

604

418

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

605

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

419

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

606

420

gobject.source_remove(self.disable_initiator_tag)

607

421

self.disable_initiator_tag = None

608

422

self.expires = None

609

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

423

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

610

424

gobject.source_remove(self.checker_initiator_tag)

611

425

self.checker_initiator_tag = None

612

426

self.stop_checker()

427

if self.disable_hook:

428

self.disable_hook(self)

613

429

self.enabled = False

614

if not quiet:

615

self.send_changedstate()

616

430

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

617

431

return False

618

432

619

433

def __del__(self):

434

self.disable_hook = None

620

435

self.disable()

621

436

622

def init_checker(self):

623

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

624

# and every interval from then on.

625

if self.checker_initiator_tag is not None:

626

gobject.source_remove(self.checker_initiator_tag)

627

self.checker_initiator_tag = (gobject.timeout_add

628

(self.interval_milliseconds(),

629

self.start_checker))

630

# 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

self.disable_initiator_tag = (gobject.timeout_add

634

(self.timeout_milliseconds(),

635

self.disable))

636

# Also start a new checker *right now*.

637

self.start_checker()

638

639

437

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

640

438

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

641

439

self.checker_callback_tag = None

642

440

self.checker = None

643

441

if os.WIFEXITED(condition):

644

self.last_checker_status = os.WEXITSTATUS(condition)

645

if self.last_checker_status == 0:

442

exitstatus = os.WEXITSTATUS(condition)

443

if exitstatus == 0:

646

444

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

647

445

vars(self))

648

446

self.checked_ok()

650

448

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

651

449

vars(self))

652

450

else:

653

self.last_checker_status = -1

654

451

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

655

452

vars(self))

656

453

657

def checked_ok(self):

658

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

659

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."""

454

def checked_ok(self, timeout=None):

455

"""Bump up the timeout for this client.

456

457

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

458

alive and well.

459

"""

665

460

if timeout is None:

666

461

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

462

self.last_checked_ok = datetime.datetime.utcnow()

463

gobject.source_remove(self.disable_initiator_tag)

464

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

465

self.disable_initiator_tag = (gobject.timeout_add

466

(_timedelta_to_milliseconds(timeout),

467

self.disable))

675

468

676

469

def need_approval(self):

677

470

self.last_approval_request = datetime.datetime.utcnow()

682

475

If a checker already exists, leave it running and do

683

476

nothing."""

684

477

# 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

478

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

479

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

480

# client would inevitably timeout, since no checker would get

481

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

689

482

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

690

483

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

691

484

# should be.

693

486

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

694

487

try:

695

488

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

489

except (AttributeError, OSError) as error:

490

if (isinstance(error, OSError)

491

and error.errno != errno.ECHILD):

492

raise error

701

493

else:

702

494

if pid:

703

495

logger.warning("Checker was a zombie")

706

498

self.current_checker_command)

707

499

# Start a new checker if needed

708

500

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

501

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

502

# In case checker_command has exactly one % operator

503

command = self.checker_command % self.host

504

except TypeError:

505

# Escape attributes for the shell

506

escaped_attrs = dict(

507

(attr,

508

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

509

errors=

510

'replace')))

511

for attr in

512

self.runtime_expansions)

513

514

try:

515

command = self.checker_command % escaped_attrs

516

except TypeError as error:

517

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

518

' %s', self.checker_command, error)

519

return True # Try again later

720

520

self.current_checker_command = command

721

521

try:

722

522

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

725

525

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

726

526

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

727

527

# 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

528

self.checker = subprocess.Popen(command,

737

529

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:

530

shell=True, cwd="/")

531

self.checker_callback_tag = (gobject.child_watch_add

532

(self.checker.pid,

533

self.checker_callback,

534

data=command))

535

# The checker may have completed before the gobject

536

# watch was added. Check for this.

751

537

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

538

if pid:

539

gobject.source_remove(self.checker_callback_tag)

540

self.checker_callback(pid, status, command)

752

541

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)

542

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

543

error)

762

544

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

763

545

return True

764

546

771

553

return

772

554

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

773

555

try:

774

self.checker.terminate()

556

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

775

557

#time.sleep(0.5)

776

558

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

777

# self.checker.kill()

559

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

778

560

except OSError as error:

779

561

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

780

562

raise

797

579

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

798

580

if byte_arrays and signature != "ay":

799

581

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

800

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

582

" signature %r" % signature)

801

583

def decorator(func):

802

584

func._dbus_is_property = True

803

585

func._dbus_interface = dbus_interface

811

593

return decorator

812

594

813

595

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

596

class DBusPropertyException(dbus.exceptions.DBusException):

852

597

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

853

598

"""

876

621

"""

877

622

878

623

@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)

624

def _is_dbus_property(obj):

625

return getattr(obj, "_dbus_is_property", False)

887

626

888

def _get_all_dbus_things(self, thing):

627

def _get_all_dbus_properties(self):

889

628

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

890

629

"""

891

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

892

name),

893

athing.__get__(self))

630

return ((prop.__get__(self)._dbus_name, prop.__get__(self))

894

631

for cls in self.__class__.__mro__

895

for name, athing in

896

inspect.getmembers(cls,

897

self._is_dbus_thing(thing)))

632

for name, prop in inspect.getmembers(cls, self._is_dbus_property))

898

633

899

634

def _get_dbus_property(self, interface_name, property_name):

900

635

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

901

636

property with the specified name and interface.

902

637

"""

903

638

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):

639

for name, value in inspect.getmembers(cls, self._is_dbus_property):

640

if value._dbus_name == property_name and value._dbus_interface == interface_name:

909

641

return value.__get__(self)

910

642

911

643

# No such property

912

644

raise DBusPropertyNotFound(self.dbus_object_path + ":"

913

645

+ interface_name + "."

914

646

+ property_name)

647

915

648

916

649

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

917

650

out_signature="v")

937

670

# The byte_arrays option is not supported yet on

938

671

# signatures other than "ay".

939

672

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))

673

raise ValueError

674

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

675

for byte in value))

945

676

prop(value)

946

677

947

678

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

952

683

953

684

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

954

685

"""

955

properties = {}

956

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

686

all = {}

687

for name, prop in self._get_all_dbus_properties():

957

688

if (interface_name

958

689

and interface_name != prop._dbus_interface):

959

690

# Interface non-empty but did not match

963

694

continue

964

695

value = prop()

965

696

if not hasattr(value, "variant_level"):

966

properties[name] = value

697

all[name] = value

967

698

continue

968

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

969

value.variant_level+1)

970

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

699

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

700

value.variant_level+1)

701

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

971

702

972

703

@dbus.service.method(dbus.INTROSPECTABLE_IFACE,

973

704

out_signature="s",

974

705

path_keyword='object_path',

975

706

connection_keyword='connection')

976

707

def Introspect(self, object_path, connection):

977

"""Overloading of standard D-Bus method.

978

979

Inserts property tags and interface annotation tags.

708

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

980

709

"""

981

710

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

982

711

connection)

989

718

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

990

719

return e

991

720

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

992

# Add property tags

993

721

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

994

722

for name, prop

995

in self._get_all_dbus_things("property")

723

in self._get_all_dbus_properties()

996

724

if prop._dbus_interface

997

725

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

998

726

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

727

# Add the names to the return values for the

1031

728

# "org.freedesktop.DBus.Properties" methods

1032

729

if (if_tag.getAttribute("name")

1047

744

except (AttributeError, xml.dom.DOMException,

1048

745

xml.parsers.expat.ExpatError) as error:

1049

746

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

1050

exc_info=error)

747

error)

1051

748

return xmlstring

1052

749

1053

750

1054

def datetime_to_dbus(dt, variant_level=0):

751

def datetime_to_dbus (dt, variant_level=0):

1055

752

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

1056

753

if dt is None:

1057

754

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

1058

755

return dbus.String(dt.isoformat(),

1059

756

variant_level=variant_level)

1060

757

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"})

758

class transitional_dbus_metaclass(DBusObjectWithProperties.__metaclass__):

759

def __new__(mcs, name, bases, attr):

760

for attrname, old_dbusobj in inspect.getmembers(bases[0]):

761

new_interface = getattr(old_dbusobj, "_dbus_interface", "").replace("se.bsnet.fukt.", "se.recompile.")

762

if (getattr(old_dbusobj, "_dbus_is_signal", False)

763

and old_dbusobj._dbus_interface.startswith("se.bsnet.fukt.Mandos")):

764

unwrappedfunc = dict(zip(old_dbusobj.func_code.co_freevars,

765

old_dbusobj.__closure__))["func"].cell_contents

766

newfunc = types.FunctionType(unwrappedfunc.func_code,

767

unwrappedfunc.func_globals,

768

unwrappedfunc.func_name,

769

unwrappedfunc.func_defaults,

770

unwrappedfunc.func_closure)

771

new_dbusfunc = dbus.service.signal(

772

new_interface, old_dbusobj._dbus_signature)(newfunc)

773

attr["_transitional_" + attrname] = new_dbusfunc

774

775

def fixscope(func1, func2):

776

def newcall(*args, **kwargs):

777

func1(*args, **kwargs)

778

func2(*args, **kwargs)

779

return newcall

780

781

attr[attrname] = fixscope(old_dbusobj, new_dbusfunc)

782

783

elif (getattr(old_dbusobj, "_dbus_is_method", False)

784

and old_dbusobj._dbus_interface.startswith("se.bsnet.fukt.Mandos")):

785

new_dbusfunc = (dbus.service.method

786

(new_interface,

787

old_dbusobj._dbus_in_signature,

788

old_dbusobj._dbus_out_signature)

789

(types.FunctionType

790

(old_dbusobj.func_code,

791

old_dbusobj.func_globals,

792

old_dbusobj.func_name,

793

old_dbusobj.func_defaults,

794

old_dbusobj.func_closure)))

795

796

attr[attrname] = new_dbusfunc

797

elif (getattr(old_dbusobj, "_dbus_is_property", False)

798

and old_dbusobj._dbus_interface.startswith("se.bsnet.fukt.Mandos")):

799

new_dbusfunc = (dbus_service_property

800

(new_interface,

801

old_dbusobj._dbus_signature,

802

old_dbusobj._dbus_access,

803

old_dbusobj._dbus_get_args_options["byte_arrays"])

804

(types.FunctionType

805

(old_dbusobj.func_code,

806

old_dbusobj.func_globals,

807

old_dbusobj.func_name,

808

old_dbusobj.func_defaults,

809

old_dbusobj.func_closure)))

810

811

attr[attrname] = new_dbusfunc

812

return type.__new__(mcs, name, bases, attr)

813

1233

814

class ClientDBus(Client, DBusObjectWithProperties):

1234

815

"""A Client class using D-Bus

1235

816

1244

825

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

1245

826

1246

827

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

828

self._approvals_pending = 0

1247

829

self.bus = bus

1248

830

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

1249

831

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

1255

837

("/clients/" + client_object_name))

1256

838

DBusObjectWithProperties.__init__(self, self.bus,

1257

839

self.dbus_object_path)

1258

840

1259

841

def notifychangeproperty(transform_func,

1260

842

dbus_name, type_func=lambda x: x,

1261

843

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

844

""" Modify a variable so that its a property that announce its

845

changes to DBus.

846

transform_fun: Function that takes a value and transform it to

847

DBus type.

848

dbus_name: DBus name of the variable

1268

849

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

850

to DBus

851

variant_level: DBus variant level. default: 1

1271

852

"""

1272

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

853

real_value = [None,]

1273

854

def setter(self, value):

855

old_value = real_value[0]

856

real_value[0] = value

1274

857

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)

858

if type_func(old_value) != type_func(real_value[0]):

859

dbus_value = transform_func(type_func(real_value[0]),

860

variant_level)

1281

861

self.PropertyChanged(dbus.String(dbus_name),

1282

862

dbus_value)

1283

setattr(self, attrname, value)

1284

863

1285

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

864

return property(lambda self: real_value[0], setter)

865

1286

866

1287

867

expires = notifychangeproperty(datetime_to_dbus, "Expires")

1288

868

approvals_pending = notifychangeproperty(dbus.Boolean,

1292

872

last_enabled = notifychangeproperty(datetime_to_dbus,

1293

873

"LastEnabled")

1294

874

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

1295

type_func = lambda checker:

1296

checker is not None)

875

type_func = lambda checker: checker is not None)

1297

876

last_checked_ok = notifychangeproperty(datetime_to_dbus,

1298

877

"LastCheckedOK")

1299

last_checker_status = notifychangeproperty(dbus.Int16,

1300

"LastCheckerStatus")

1301

last_approval_request = notifychangeproperty(

1302

datetime_to_dbus, "LastApprovalRequest")

878

last_approval_request = notifychangeproperty(datetime_to_dbus,

879

"LastApprovalRequest")

1303

880

approved_by_default = notifychangeproperty(dbus.Boolean,

1304

881

"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)

882

approval_delay = notifychangeproperty(dbus.UInt16, "ApprovalDelay",

883

type_func = _timedelta_to_milliseconds)

884

approval_duration = notifychangeproperty(dbus.UInt16, "ApprovalDuration",

885

type_func = _timedelta_to_milliseconds)

1312

886

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)

887

timeout = notifychangeproperty(dbus.UInt16, "Timeout",

888

type_func = _timedelta_to_milliseconds)

889

extended_timeout = notifychangeproperty(dbus.UInt16, "ExtendedTimeout",

890

type_func = _timedelta_to_milliseconds)

891

interval = notifychangeproperty(dbus.UInt16, "Interval",

892

type_func = _timedelta_to_milliseconds)

1323

893

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

1324

894

1325

895

del notifychangeproperty

1353

923

*args, **kwargs)

1354

924

1355

925

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

1356

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

926

old_checker = self.checker

927

if self.checker is not None:

928

old_checker_pid = self.checker.pid

929

else:

930

old_checker_pid = None

1357

931

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

1358

932

# Only if new checker process was started

1359

933

if (self.checker is not None

1363

937

return r

1364

938

1365

939

def _reset_approved(self):

1366

self.approved = None

940

self._approved = None

1367

941

return False

1368

942

1369

943

def approve(self, value=True):

1370

self.approved = value

1371

gobject.timeout_add(timedelta_to_milliseconds

944

self.send_changedstate()

945

self._approved = value

946

gobject.timeout_add(_timedelta_to_milliseconds

1372

947

(self.approval_duration),

1373

948

self._reset_approved)

1374

self.send_changedstate()

949

1375

950

1376

951

## 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"}

1385

952

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

953

1386

954

## Signals

1387

955

1388

956

# CheckerCompleted - signal

1487

1055

access="readwrite")

1488

1056

def ApprovalDuration_dbus_property(self, value=None):

1489

1057

if value is None: # get

1490

return dbus.UInt64(timedelta_to_milliseconds(

1058

return dbus.UInt64(_timedelta_to_milliseconds(

1491

1059

self.approval_duration))

1492

1060

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

1493

1061

1507

1075

def Host_dbus_property(self, value=None):

1508

1076

if value is None: # get

1509

1077

return dbus.String(self.host)

1510

self.host = unicode(value)

1078

self.host = value

1511

1079

1512

1080

# Created - property

1513

1081

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

1514

1082

def Created_dbus_property(self):

1515

return datetime_to_dbus(self.created)

1083

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

1516

1084

1517

1085

# LastEnabled - property

1518

1086

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

1539

1107

return

1540

1108

return datetime_to_dbus(self.last_checked_ok)

1541

1109

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

1110

# Expires - property

1549

1111

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

1550

1112

def Expires_dbus_property(self):

1561

1123

def Timeout_dbus_property(self, value=None):

1562

1124

if value is None: # get

1563

1125

return dbus.UInt64(self.timeout_milliseconds())

1564

old_timeout = self.timeout

1565

1126

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))

1127

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

1128

return

1129

# Reschedule timeout

1130

gobject.source_remove(self.disable_initiator_tag)

1131

self.disable_initiator_tag = None

1132

self.expires = None

1133

time_to_die = (self.

1134

_timedelta_to_milliseconds((self

1135

.last_checked_ok

1136

+ self.timeout)

1137

- datetime.datetime

1138

.utcnow()))

1139

if time_to_die <= 0:

1140

# The timeout has passed

1141

self.disable()

1142

else:

1143

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

1144

+ datetime.timedelta(milliseconds = time_to_die))

1145

self.disable_initiator_tag = (gobject.timeout_add

1146

(time_to_die, self.disable))

1582

1147

1583

1148

# ExtendedTimeout - property

1584

1149

@dbus_service_property(_interface, signature="t",

1597

1162

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

1598

1163

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

1599

1164

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

1165

# Reschedule checker run

1166

gobject.source_remove(self.checker_initiator_tag)

1167

self.checker_initiator_tag = (gobject.timeout_add

1168

(value, self.start_checker))

1169

self.start_checker() # Start one now, too

1606

1170

1607

1171

# Checker - property

1608

1172

@dbus_service_property(_interface, signature="s",

1610

1174

def Checker_dbus_property(self, value=None):

1611

1175

if value is None: # get

1612

1176

return dbus.String(self.checker_command)

1613

self.checker_command = unicode(value)

1177

self.checker_command = value

1614

1178

1615

1179

# CheckerRunning - property

1616

1180

@dbus_service_property(_interface, signature="b",

1645

1209

raise KeyError()

1646

1210

1647

1211

def __getattribute__(self, name):

1648

if name == '_pipe':

1212

if(name == '_pipe'):

1649

1213

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

1650

1214

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

1651

1215

data = self._pipe.recv()

1658

1222

return func

1659

1223

1660

1224

def __setattr__(self, name, value):

1661

if name == '_pipe':

1225

if(name == '_pipe'):

1662

1226

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

1663

1227

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

1664

1228

1229

class ClientDBusTransitional(ClientDBus):

1230

__metaclass__ = transitional_dbus_metaclass

1665

1231

1666

1232

class ClientHandler(socketserver.BaseRequestHandler, object):

1667

1233

"""A class to handle client connections.

1704

1270

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

1705

1271

try:

1706

1272

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

1707

raise RuntimeError(line)

1273

raise RuntimeError

1708

1274

except (ValueError, IndexError, RuntimeError) as error:

1709

1275

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

1710

1276

return

1747

1313

client.name)

1748

1314

if self.server.use_dbus:

1749

1315

# Emit D-Bus signal

1750

client.Rejected("Disabled")

1316

client.Rejected("Disabled")

1751

1317

return

1752

1318

1753

if client.approved or not client.approval_delay:

1319

if client._approved or not client.approval_delay:

1754

1320

#We are approved or approval is disabled

1755

1321

break

1756

elif client.approved is None:

1322

elif client._approved is None:

1757

1323

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

1758

1324

client.name)

1759

1325

if self.server.use_dbus:

1770

1336

return

1771

1337

1772

1338

#wait until timeout or approved

1339

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

1773

1340

time = datetime.datetime.now()

1774

1341

client.changedstate.acquire()

1775

client.changedstate.wait(

1776

float(timedelta_to_milliseconds(delay)

1777

/ 1000))

1342

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

1778

1343

client.changedstate.release()

1779

1344

time2 = datetime.datetime.now()

1780

1345

if (time2 - time) >= delay:

1796

1361

try:

1797

1362

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

1798

1363

except gnutls.errors.GNUTLSError as error:

1799

logger.warning("gnutls send failed",

1800

exc_info=error)

1364

logger.warning("gnutls send failed")

1801

1365

return

1802

1366

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

1803

1367

sent, len(client.secret)

1805

1369

sent_size += sent

1806

1370

1807

1371

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

1808

# bump the timeout using extended_timeout

1809

client.bump_timeout(client.extended_timeout)

1372

# bump the timeout as if seen

1373

client.checked_ok(client.extended_timeout)

1810

1374

if self.server.use_dbus:

1811

1375

# Emit D-Bus signal

1812

1376

client.GotSecret()

1817

1381

try:

1818

1382

session.bye()

1819

1383

except gnutls.errors.GNUTLSError as error:

1820

logger.warning("GnuTLS bye failed",

1821

exc_info=error)

1384

logger.warning("GnuTLS bye failed")

1822

1385

1823

1386

@staticmethod

1824

1387

def peer_certificate(session):

1880

1443

# Convert the buffer to a Python bytestring

1881

1444

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

1882

1445

# Convert the bytestring to hexadecimal notation

1883

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

1446

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

1884

1447

return hex_fpr

1885

1448

1886

1449

1889

1452

def sub_process_main(self, request, address):

1890

1453

try:

1891

1454

self.finish_request(request, address)

1892

except Exception:

1455

except:

1893

1456

self.handle_error(request, address)

1894

1457

self.close_request(request)

1895

1458

1896

1459

def process_request(self, request, address):

1897

1460

"""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

1461

multiprocessing.Process(target = self.sub_process_main,

1462

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

1902

1463

1903

1464

1904

1465

class MultiprocessingMixInWithPipe(MultiprocessingMixIn, object):

1910

1471

"""

1911

1472

parent_pipe, self.child_pipe = multiprocessing.Pipe()

1912

1473

1913

proc = MultiprocessingMixIn.process_request(self, request,

1914

client_address)

1474

super(MultiprocessingMixInWithPipe,

1475

self).process_request(request, client_address)

1915

1476

self.child_pipe.close()

1916

self.add_pipe(parent_pipe, proc)

1477

self.add_pipe(parent_pipe)

1917

1478

1918

def add_pipe(self, parent_pipe, proc):

1479

def add_pipe(self, parent_pipe):

1919

1480

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

1920

raise NotImplementedError()

1481

raise NotImplementedError

1921

1482

1922

1483

1923

1484

class IPv6_TCPServer(MultiprocessingMixInWithPipe,

1930

1491

use_ipv6: Boolean; to use IPv6 or not

1931

1492

"""

1932

1493

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

"""

1494

interface=None, use_ipv6=True):

1937

1495

self.interface = interface

1938

1496

if use_ipv6:

1939

1497

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

1498

socketserver.TCPServer.__init__(self, server_address,

1967

1499

RequestHandlerClass)

1968

1969

1500

def server_bind(self):

1970

1501

"""This overrides the normal server_bind() function

1971

1502

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

1979

1510

try:

1980

1511

self.socket.setsockopt(socket.SOL_SOCKET,

1981

1512

SO_BINDTODEVICE,

1982

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

1513

str(self.interface

1514

+ '\0'))

1983

1515

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:

1516

if error[0] == errno.EPERM:

1517

logger.error("No permission to"

1518

" bind to interface %s",

1519

self.interface)

1520

elif error[0] == errno.ENOPROTOOPT:

1988

1521

logger.error("SO_BINDTODEVICE not available;"

1989

1522

" cannot bind to interface %s",

1990

1523

self.interface)

1991

elif error.errno == errno.ENODEV:

1992

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

1993

" cannot bind", self.interface)

1994

1524

else:

1995

1525

raise

1996

1526

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

1999

1529

if self.address_family == socket.AF_INET6:

2000

1530

any_address = "::" # in6addr_any

2001

1531

else:

2002

any_address = "0.0.0.0" # INADDR_ANY

1532

any_address = socket.INADDR_ANY

2003

1533

self.server_address = (any_address,

2004

1534

self.server_address[1])

2005

1535

elif not self.server_address[1]:

2026

1556

"""

2027

1557

def __init__(self, server_address, RequestHandlerClass,

2028

1558

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

2029

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

1559

gnutls_priority=None, use_dbus=True):

2030

1560

self.enabled = False

2031

1561

self.clients = clients

2032

1562

if self.clients is None:

2033

self.clients = {}

1563

self.clients = set()

2034

1564

self.use_dbus = use_dbus

2035

1565

self.gnutls_priority = gnutls_priority

2036

1566

IPv6_TCPServer.__init__(self, server_address,

2037

1567

RequestHandlerClass,

2038

1568

interface = interface,

2039

use_ipv6 = use_ipv6,

2040

socketfd = socketfd)

1569

use_ipv6 = use_ipv6)

2041

1570

def server_activate(self):

2042

1571

if self.enabled:

2043

1572

return socketserver.TCPServer.server_activate(self)

2044

2045

1573

def enable(self):

2046

1574

self.enabled = True

2047

2048

def add_pipe(self, parent_pipe, proc):

1575

def add_pipe(self, parent_pipe):

2049

1576

# Call "handle_ipc" for both data and EOF events

2050

1577

gobject.io_add_watch(parent_pipe.fileno(),

2051

1578

gobject.IO_IN | gobject.IO_HUP,

2052

1579

functools.partial(self.handle_ipc,

2053

parent_pipe =

2054

parent_pipe,

2055

proc = proc))

2056

1580

parent_pipe = parent_pipe))

1581

2057

1582

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()

1583

client_object=None):

1584

condition_names = {

1585

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

1586

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

1587

# blocking).

1588

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

1589

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

1590

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

1591

# broken, usually for pipes and

1592

# sockets).

1593

}

1594

conditions_string = ' | '.join(name

1595

for cond, name in

1596

condition_names.iteritems()

1597

if cond & condition)

1598

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

1599

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

2063

1600

return False

2064

1601

2065

1602

# Read a request from the child

2070

1607

fpr = request[1]

2071

1608

address = request[2]

2072

1609

2073

for c in self.clients.itervalues():

1610

for c in self.clients:

2074

1611

if c.fingerprint == fpr:

2075

1612

client = c

2076

1613

break

2079

1616

"dress: %s", fpr, address)

2080

1617

if self.use_dbus:

2081

1618

# Emit D-Bus signal

2082

mandos_dbus_service.ClientNotFound(fpr,

2083

address[0])

1619

mandos_dbus_service.ClientNotFound(fpr, address[0])

2084

1620

parent_pipe.send(False)

2085

1621

return False

2086

1622

2087

1623

gobject.io_add_watch(parent_pipe.fileno(),

2088

1624

gobject.IO_IN | gobject.IO_HUP,

2089

1625

functools.partial(self.handle_ipc,

2090

parent_pipe =

2091

parent_pipe,

2092

proc = proc,

2093

client_object =

2094

client))

1626

parent_pipe = parent_pipe,

1627

client_object = client))

2095

1628

parent_pipe.send(True)

2096

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

2097

# same fileno

1629

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

2098

1630

return False

2099

1631

if command == 'funcall':

2100

1632

funcname = request[1]

2101

1633

args = request[2]

2102

1634

kwargs = request[3]

2103

1635

2104

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

2105

funcname)(*args,

2106

**kwargs)))

1636

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

2107

1637

2108

1638

if command == 'getattr':

2109

1639

attrname = request[1]

2110

1640

if callable(client_object.__getattribute__(attrname)):

2111

1641

parent_pipe.send(('function',))

2112

1642

else:

2113

parent_pipe.send(('data', client_object

2114

.__getattribute__(attrname)))

1643

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

2115

1644

2116

1645

if command == 'setattr':

2117

1646

attrname = request[1]

2121

1650

return True

2122

1651

2123

1652

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

1653

def string_to_delta(interval):

2224

1654

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

2225

1655

2236

1666

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

2237

1667

datetime.timedelta(0, 330)

2238

1668

"""

2239

2240

try:

2241

return rfc3339_duration_to_delta(interval)

2242

except ValueError:

2243

pass

2244

2245

1669

timevalue = datetime.timedelta(0)

2246

1670

for s in interval.split():

2247

1671

try:

2258

1682

elif suffix == "w":

2259

1683

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

2260

1684

else:

2261

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

2262

.format(suffix))

2263

except IndexError as e:

1685

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

1686

except (ValueError, IndexError) as e:

2264

1687

raise ValueError(*(e.args))

2265

1688

timevalue += delta

2266

1689

return timevalue

2267

1690

2268

1691

1692

def if_nametoindex(interface):

1693

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

1694

1695

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

1696

global if_nametoindex

1697

try:

1698

if_nametoindex = (ctypes.cdll.LoadLibrary

1699

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

1700

.if_nametoindex)

1701

except (OSError, AttributeError):

1702

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

1703

def if_nametoindex(interface):

1704

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

1705

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

1706

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

1707

ifreq = fcntl.ioctl(s, SIOCGIFINDEX,

1708

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

1709

interface))

1710

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

1711

ifreq[16:20])[0]

1712

return interface_index

1713

return if_nametoindex(interface)

1714

1715

2269

1716

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

2270

1717

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

2271

1718

2279

1726

sys.exit()

2280

1727

if not noclose:

2281

1728

# Close all standard open file descriptors

2282

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

1729

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

2283

1730

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

2284

1731

raise OSError(errno.ENODEV,

2285

"{0} not a character device"

2286

.format(os.devnull))

1732

"%s not a character device"

1733

% os.path.devnull)

2287

1734

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

2288

1735

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

2289

1736

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

2298

1745

2299

1746

parser = argparse.ArgumentParser()

2300

1747

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

2301

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

1748

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

2302

1749

help="show version number and exit")

2303

1750

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

2304

1751

help="Bind to interface IF")

2310

1757

help="Run self-test")

2311

1758

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

2312

1759

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

2313

" to terminal", default=None)

1760

" to terminal")

2314

1761

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

2315

1762

help="Debug level for stdout output")

2316

1763

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

2323

1770

" files")

2324

1771

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

2325

1772

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

2326

" system bus interface", default=None)

1773

" system bus interface")

2327

1774

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

1775

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

2341

1776

options = parser.parse_args()

2342

1777

2343

1778

if options.check:

2344

1779

import doctest

2345

fail_count, test_count = doctest.testmod()

2346

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

1780

doctest.testmod()

1781

sys.exit()

2347

1782

2348

1783

# Default values for config file for server-global settings

2349

1784

server_defaults = { "interface": "",

2351

1786

"port": "",

2352

1787

"debug": "False",

2353

1788

"priority":

2354

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

1789

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

2355

1790

"servicename": "Mandos",

2356

1791

"use_dbus": "True",

2357

1792

"use_ipv6": "True",

2358

1793

"debuglevel": "",

2359

"restore": "True",

2360

"socket": "",

2361

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

2362

"foreground": "False",

2363

1794

}

2364

1795

2365

1796

# Parse config file for server-global settings

2370

1801

# Convert the SafeConfigParser object to a dict

2371

1802

server_settings = server_config.defaults()

2372

1803

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

2373

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

1804

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

2374

1805

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

2375

1806

option)

2376

1807

if server_settings["port"]:

2377

1808

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

2378

1809

"port")

2379

if server_settings["socket"]:

2380

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

2381

"socket")

2382

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

2383

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

2384

# happen with a supplied network socket.

2385

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

2386

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

2387

["socket"])

2388

1810

del server_config

2389

1811

2390

1812

# Override the settings from the config file with command line

2391

1813

# options, if set.

2392

1814

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

2393

1815

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

2394

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

2395

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

1816

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

2396

1817

value = getattr(options, option)

2397

1818

if value is not None:

2398

1819

server_settings[option] = value

2401

1822

for option in server_settings.keys():

2402

1823

if type(server_settings[option]) is str:

2403

1824

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

2404

# Force all boolean options to be boolean

2405

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

2406

"foreground"):

2407

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

2408

# Debug implies foreground

2409

if server_settings["debug"]:

2410

server_settings["foreground"] = True

2411

1825

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

2412

1826

2413

1827

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

2417

1831

debuglevel = server_settings["debuglevel"]

2418

1832

use_dbus = server_settings["use_dbus"]

2419

1833

use_ipv6 = server_settings["use_ipv6"]

2420

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

2421

stored_state_file)

2422

foreground = server_settings["foreground"]

2423

2424

if debug:

2425

initlogger(debug, logging.DEBUG)

2426

else:

2427

if not debuglevel:

2428

initlogger(debug)

2429

else:

2430

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

2431

initlogger(debug, level)

2432

1834

2433

1835

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

2434

1836

syslogger.setFormatter(logging.Formatter

2435

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

2436

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

2437

.format(server_settings

2438

["servicename"])))

1837

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

1838

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

1839

% server_settings["servicename"]))

2439

1840

2440

1841

# Parse config file with clients

2441

client_config = configparser.SafeConfigParser(Client

2442

.client_defaults)

1842

client_defaults = { "timeout": "5m",

1843

"extended_timeout": "15m",

1844

"interval": "2m",

1845

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

1846

"host": "",

1847

"approval_delay": "0s",

1848

"approval_duration": "1s",

1849

}

1850

client_config = configparser.SafeConfigParser(client_defaults)

2443

1851

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

2444

1852

"clients.conf"))

2445

1853

2454

1862

use_ipv6=use_ipv6,

2455

1863

gnutls_priority=

2456

1864

server_settings["priority"],

2457

use_dbus=use_dbus,

2458

socketfd=(server_settings["socket"]

2459

or None))

2460

if not foreground:

2461

pidfilename = "/run/mandos.pid"

2462

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

2463

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

2464

pidfile = None

1865

use_dbus=use_dbus)

1866

if not debug:

1867

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

2465

1868

try:

2466

1869

pidfile = open(pidfilename, "w")

2467

except IOError as e:

2468

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

2469

exc_info=e)

1870

except IOError:

1871

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

2470

1872

2471

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

1873

try:

1874

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

1875

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

1876

except KeyError:

2472

1877

try:

2473

uid = pwd.getpwnam(name).pw_uid

2474

gid = pwd.getpwnam(name).pw_gid

2475

break

1878

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

1879

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

2476

1880

except KeyError:

2477

continue

2478

else:

2479

uid = 65534

2480

gid = 65534

1881

try:

1882

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

1883

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

1884

except KeyError:

1885

uid = 65534

1886

gid = 65534

2481

1887

try:

2482

1888

os.setgid(gid)

2483

1889

os.setuid(uid)

2484

1890

except OSError as error:

2485

if error.errno != errno.EPERM:

2486

raise

1891

if error[0] != errno.EPERM:

1892

raise error

1893

1894

if not debug and not debuglevel:

1895

syslogger.setLevel(logging.WARNING)

1896

console.setLevel(logging.WARNING)

1897

if debuglevel:

1898

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

1899

syslogger.setLevel(level)

1900

console.setLevel(level)

2487

1901

2488

1902

if debug:

2489

1903

# Enable all possible GnuTLS debugging

2500

1914

.gnutls_global_set_log_function(debug_gnutls))

2501

1915

2502

1916

# Redirect stdin so all checkers get /dev/null

2503

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

1917

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

2504

1918

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

2505

1919

if null > 2:

2506

1920

os.close(null)

1921

else:

1922

# No console logging

1923

logger.removeHandler(console)

2507

1924

2508

1925

# Need to fork before connecting to D-Bus

2509

if not foreground:

1926

if not debug:

2510

1927

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

2511

1928

daemon()

2512

1929

2513

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

2514

# need to inform gobject that threads will be used.

2515

gobject.threads_init()

2516

2517

1930

global main_loop

2518

1931

# From the Avahi example code

2519

DBusGMainLoop(set_as_default=True)

1932

DBusGMainLoop(set_as_default=True )

2520

1933

main_loop = gobject.MainLoop()

2521

1934

bus = dbus.SystemBus()

2522

1935

# End of Avahi example code

2523

1936

if use_dbus:

2524

1937

try:

2525

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

2526

bus, do_not_queue=True)

2527

old_bus_name = (dbus.service.BusName

2528

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

2529

do_not_queue=True))

1938

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

1939

bus, do_not_queue=True)

1940

bus_name2 = dbus.service.BusName("se.recompile.Mandos",

1941

bus, do_not_queue=True)

2530

1942

except dbus.exceptions.NameExistsException as e:

2531

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

1943

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

2532

1944

use_dbus = False

2533

1945

server_settings["use_dbus"] = False

2534

1946

tcp_server.use_dbus = False

2535

1947

protocol = avahi.PROTO_INET6 if use_ipv6 else avahi.PROTO_INET

2536

service = AvahiServiceToSyslog(name =

2537

server_settings["servicename"],

2538

servicetype = "_mandos._tcp",

2539

protocol = protocol, bus = bus)

1948

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

1949

servicetype = "_mandos._tcp",

1950

protocol = protocol, bus = bus)

2540

1951

if server_settings["interface"]:

2541

1952

service.interface = (if_nametoindex

2542

1953

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

2546

1957

2547

1958

client_class = Client

2548

1959

if use_dbus:

2549

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

2550

2551

client_settings = Client.config_parser(client_config)

2552

old_client_settings = {}

2553

clients_data = {}

2554

2555

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

2556

global wnull

2557

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

2558

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

2559

# mode

2560

if debug or not foreground:

2561

wnull.close()

2562

2563

# Get client data and settings from last running state.

2564

if server_settings["restore"]:

2565

try:

2566

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

2567

clients_data, old_client_settings = (pickle.load

2568

(stored_state))

2569

os.remove(stored_state_path)

2570

except IOError as e:

2571

if e.errno == errno.ENOENT:

2572

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

2573

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

2574

else:

2575

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

2576

exc_info=e)

2577

raise

2578

except EOFError as e:

2579

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

2580

"EOFError:", exc_info=e)

2581

2582

with PGPEngine() as pgp:

2583

for client_name, client in clients_data.iteritems():

2584

# Skip removed clients

2585

if client_name not in client_settings:

2586

continue

2587

2588

# Decide which value to use after restoring saved state.

2589

# We have three different values: Old config file,

2590

# new config file, and saved state.

2591

# New config value takes precedence if it differs from old

2592

# config value, otherwise use saved state.

2593

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

2594

try:

2595

# For each value in new config, check if it

2596

# differs from the old config value (Except for

2597

# the "secret" attribute)

2598

if (name != "secret" and

2599

value != old_client_settings[client_name]

2600

[name]):

2601

client[name] = value

2602

except KeyError:

2603

pass

2604

2605

# Clients who has passed its expire date can still be

2606

# enabled if its last checker was successful. Clients

2607

# whose checker succeeded before we stored its state is

2608

# assumed to have successfully run all checkers during

2609

# downtime.

2610

if client["enabled"]:

2611

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

2612

if not client["last_checked_ok"]:

2613

logger.warning(

2614

"disabling client {0} - Client never "

2615

"performed a successful checker"

2616

.format(client_name))

2617

client["enabled"] = False

2618

elif client["last_checker_status"] != 0:

2619

logger.warning(

2620

"disabling client {0} - Client "

2621

"last checker failed with error code {1}"

2622

.format(client_name,

2623

client["last_checker_status"]))

2624

client["enabled"] = False

2625

else:

2626

client["expires"] = (datetime.datetime

2627

.utcnow()

2628

+ client["timeout"])

2629

logger.debug("Last checker succeeded,"

2630

" keeping {0} enabled"

2631

.format(client_name))

1960

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

1961

def client_config_items(config, section):

1962

special_settings = {

1963

"approved_by_default":

1964

lambda: config.getboolean(section,

1965

"approved_by_default"),

1966

}

1967

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

2632

1968

try:

2633

client["secret"] = (

2634

pgp.decrypt(client["encrypted_secret"],

2635

client_settings[client_name]

2636

["secret"]))

2637

except PGPError:

2638

# If decryption fails, we use secret from new settings

2639

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

2640

.format(client_name))

2641

client["secret"] = (

2642

client_settings[client_name]["secret"])

2643

2644

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

2645

for client_name in (set(old_client_settings)

2646

- set(client_settings)):

2647

del clients_data[client_name]

2648

for client_name in (set(client_settings)

2649

- set(old_client_settings)):

2650

clients_data[client_name] = client_settings[client_name]

2651

2652

# Create all client objects

2653

for client_name, client in clients_data.iteritems():

2654

tcp_server.clients[client_name] = client_class(

2655

name = client_name, settings = client,

2656

server_settings = server_settings)

2657

1969

yield (name, special_settings[name]())

1970

except KeyError:

1971

yield (name, value)

1972

1973

tcp_server.clients.update(set(

1974

client_class(name = section,

1975

config= dict(client_config_items(

1976

client_config, section)))

1977

for section in client_config.sections()))

2658

1978

if not tcp_server.clients:

2659

1979

logger.warning("No clients defined")

2660

2661

if not foreground:

2662

if pidfile is not None:

2663

try:

2664

with pidfile:

2665

pid = os.getpid()

2666

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

2667

except IOError:

2668

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

2669

pidfilename, pid)

2670

del pidfile

1980

1981

if not debug:

1982

try:

1983

with pidfile:

1984

pid = os.getpid()

1985

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

1986

del pidfile

1987

except IOError:

1988

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

1989

pidfilename, pid)

1990

except NameError:

1991

# "pidfile" was never created

1992

pass

2671

1993

del pidfilename

1994

1995

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

2672

1996

2673

1997

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

2674

1998

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

2675

1999

2676

2000

if use_dbus:

2677

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

2678

"se.bsnet.fukt.Mandos"})

2679

class MandosDBusService(DBusObjectWithProperties):

2001

class MandosDBusService(dbus.service.Object):

2680

2002

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

2681

2003

def __init__(self):

2682

2004

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

2683

_interface = "se.recompile.Mandos"

2684

2685

@dbus_interface_annotations(_interface)

2686

def _foo(self):

2687

return { "org.freedesktop.DBus.Property"

2688

".EmitsChangedSignal":

2689

"false"}

2005

_interface = "se.bsnet.fukt.Mandos"

2690

2006

2691

2007

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

2692

2008

def ClientAdded(self, objpath):

2707

2023

def GetAllClients(self):

2708

2024

"D-Bus method"

2709

2025

return dbus.Array(c.dbus_object_path

2710

for c in

2711

tcp_server.clients.itervalues())

2026

for c in tcp_server.clients)

2712

2027

2713

2028

@dbus.service.method(_interface,

2714

2029

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

2716

2031

"D-Bus method"

2717

2032

return dbus.Dictionary(

2718

2033

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

2719

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

2034

for c in tcp_server.clients),

2720

2035

signature="oa{sv}")

2721

2036

2722

2037

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

2723

2038

def RemoveClient(self, object_path):

2724

2039

"D-Bus method"

2725

for c in tcp_server.clients.itervalues():

2040

for c in tcp_server.clients:

2726

2041

if c.dbus_object_path == object_path:

2727

del tcp_server.clients[c.name]

2042

tcp_server.clients.remove(c)

2728

2043

c.remove_from_connection()

2729

2044

# Don't signal anything except ClientRemoved

2730

2045

c.disable(quiet=True)

2735

2050

2736

2051

del _interface

2737

2052

2738

mandos_dbus_service = MandosDBusService()

2053

class MandosDBusServiceTransitional(MandosDBusService):

2054

__metaclass__ = transitional_dbus_metaclass

2055

mandos_dbus_service = MandosDBusServiceTransitional()

2739

2056

2740

2057

def cleanup():

2741

2058

"Cleanup function; run on exit"

2742

2059

service.cleanup()

2743

2060

2744

multiprocessing.active_children()

2745

wnull.close()

2746

if not (tcp_server.clients or client_settings):

2747

return

2748

2749

# Store client before exiting. Secrets are encrypted with key

2750

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

2751

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

2752

clients = {}

2753

with PGPEngine() as pgp:

2754

for client in tcp_server.clients.itervalues():

2755

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

2756

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

2757

key)

2758

client_dict = {}

2759

2760

# A list of attributes that can not be pickled

2761

# + secret.

2762

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

2763

"checker", "server_settings"))

2764

for name, typ in (inspect.getmembers

2765

(dbus.service.Object)):

2766

exclude.add(name)

2767

2768

client_dict["encrypted_secret"] = (client

2769

.encrypted_secret)

2770

for attr in client.client_structure:

2771

if attr not in exclude:

2772

client_dict[attr] = getattr(client, attr)

2773

2774

clients[client.name] = client_dict

2775

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

2776

2777

try:

2778

with (tempfile.NamedTemporaryFile

2779

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

2780

dir=os.path.dirname(stored_state_path),

2781

delete=False)) as stored_state:

2782

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

2783

tempname=stored_state.name

2784

os.rename(tempname, stored_state_path)

2785

except (IOError, OSError) as e:

2786

if not debug:

2787

try:

2788

os.remove(tempname)

2789

except NameError:

2790

pass

2791

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

2792

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

2793

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

2794

else:

2795

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

2796

exc_info=e)

2797

raise

2798

2799

# Delete all clients, and settings from config

2800

2061

while tcp_server.clients:

2801

name, client = tcp_server.clients.popitem()

2062

client = tcp_server.clients.pop()

2802

2063

if use_dbus:

2803

2064

client.remove_from_connection()

2065

client.disable_hook = None

2804

2066

# Don't signal anything except ClientRemoved

2805

2067

client.disable(quiet=True)

2806

2068

if use_dbus:

2807

2069

# Emit D-Bus signal

2808

mandos_dbus_service.ClientRemoved(client

2809

.dbus_object_path,

2070

mandos_dbus_service.ClientRemoved(client.dbus_object_path,

2810

2071

client.name)

2811

client_settings.clear()

2812

2072

2813

2073

atexit.register(cleanup)

2814

2074

2815

for client in tcp_server.clients.itervalues():

2075

for client in tcp_server.clients:

2816

2076

if use_dbus:

2817

2077

# Emit D-Bus signal

2818

2078

mandos_dbus_service.ClientAdded(client.dbus_object_path)

2819

# Need to initiate checking of clients

2820

if client.enabled:

2821

client.init_checker()

2079

client.enable()

2822

2080

2823

2081

tcp_server.enable()

2824

2082

tcp_server.server_activate()

2827

2085

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

2828

2086

if use_ipv6:

2829

2087

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

2830

" flowinfo %d, scope_id %d",

2831

*tcp_server.socket.getsockname())

2088

" flowinfo %d, scope_id %d"

2089

% tcp_server.socket.getsockname())

2832

2090

else: # IPv4

2833

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

2834

*tcp_server.socket.getsockname())

2091

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

2092

% tcp_server.socket.getsockname())

2835

2093

2836

2094

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

2837

2095

2840

2098

try:

2841

2099

service.activate()

2842

2100

except dbus.exceptions.DBusException as error:

2843

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

2101

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

2844

2102

cleanup()

2845

2103

sys.exit(1)

2846

2104

# End of Avahi example code

2853

2111

logger.debug("Starting main loop")

2854

2112

main_loop.run()

2855

2113

except AvahiError as error:

2856

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

2114

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

2857

2115

cleanup()

2858

2116

sys.exit(1)

2859

2117

except KeyboardInterrupt:

2864

2122

# Must run before the D-Bus bus name gets deregistered

2865

2123

cleanup()

2866

2124

2125

2867

2126

if __name__ == '__main__':

2868

2127

main()