/mandos/release : revision 237.25.5

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#!/usr/bin/python

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#!/usr/bin/python2.7

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# -*- mode: python; coding: utf-8 -*-

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#

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# Mandos server - give out binary blobs to connecting clients.

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

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#

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# Everything else is

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#

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

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

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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 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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import ctypes.util

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import xml.dom.minidom

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import inspect

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import GnuPGInterface

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try:

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SO_BINDTODEVICE = socket.SO_BINDTODEVICE

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except ImportError:

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SO_BINDTODEVICE = None

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version = "1.5.3"

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if sys.version_info.major == 2:

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str = unicode

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version = "1.6.9"

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stored_state_file = "clients.pickle"

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logger = logging.getLogger()

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syslogger = (logging.handlers.SysLogHandler

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(facility = logging.handlers.SysLogHandler.LOG_DAEMON,

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

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syslogger = None

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try:

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if_nametoindex = (ctypes.cdll.LoadLibrary

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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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struct.pack(b"16s16x", interface))

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interface_index = struct.unpack("I", 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 = "/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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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.gnupg = GnuPGInterface.GnuPG()

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

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self.gnupg = GnuPGInterface.GnuPG()

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self.gnupg.options.meta_interactive = False

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self.gnupg.options.homedir = self.tempdir

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self.gnupg.options.extra_args.extend(['--force-mdc',

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'--quiet',

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'--no-use-agent'])

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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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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 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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return b"mandos" + binascii.hexlify(password)

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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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self.gnupg.passphrase = self.password_encode(password)

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with open(os.devnull, "w") as devnull:

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try:

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proc = self.gnupg.run(['--symmetric'],

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create_fhs=['stdin', 'stdout'],

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attach_fhs={'stderr': devnull})

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with contextlib.closing(proc.handles['stdin']) as f:

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f.write(data)

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with contextlib.closing(proc.handles['stdout']) as f:

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ciphertext = f.read()

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proc.wait()

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except IOError as e:

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raise PGPError(e)

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self.gnupg.passphrase = None

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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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self.gnupg.passphrase = self.password_encode(password)

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with open(os.devnull, "w") as devnull:

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try:

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proc = self.gnupg.run(['--decrypt'],

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create_fhs=['stdin', 'stdout'],

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attach_fhs={'stderr': devnull})

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with contextlib.closing(proc.handles['stdin']) as f:

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f.write(data)

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with contextlib.closing(proc.handles['stdout']) as f:

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decrypted_plaintext = f.read()

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proc.wait()

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except IOError as e:

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raise PGPError(e)

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self.gnupg.passphrase = None

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passphrase = self.password_encode(password)

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with tempfile.NamedTemporaryFile(dir = self.tempdir

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) as passfile:

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passfile.write(passphrase)

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passfile.flush()

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

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'--passphrase-file',

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passfile.name]

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+ self.gnupgargs,

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stdin = subprocess.PIPE,

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stdout = subprocess.PIPE,

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stderr = subprocess.PIPE)

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decrypted_plaintext, err = proc.communicate(input

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= data)

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if proc.returncode != 0:

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raise PGPError(err)

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return decrypted_plaintext

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class AvahiError(Exception):

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

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self.value = value

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super(AvahiError, self).__init__(value, *args, **kwargs)

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def __unicode__(self):

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return unicode(repr(self.value))

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return super(AvahiError, self).__init__(value, *args,

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**kwargs)

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class AvahiServiceError(AvahiError):

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pass

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Used to optionally bind to the specified interface.

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name: string; Example: 'Mandos'

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

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

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

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port: integer; what port to announce

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TXT: list of strings; TXT record for the service

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

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server: D-Bus Server

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bus: dbus.SystemBus()

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"""

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

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

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

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self.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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def rename(self, remove=True):

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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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logger.critical("No suitable Zeroconf service name found"

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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 = str(self.server

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.GetAlternativeServiceName(self.name))

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self.rename_count += 1

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

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self.name)

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self.remove()

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if remove:

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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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self.cleanup()

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os._exit(1)

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self.rename_count += 1

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if (error.get_dbus_name()

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== "org.freedesktop.Avahi.CollisionError"):

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logger.info("Local Zeroconf service name collision.")

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return self.rename(remove=False)

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else:

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

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self.cleanup()

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os._exit(1)

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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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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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self.rename()

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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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str(error))

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

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.format(error))

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def cleanup(self):

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

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if self.group is not None:

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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)

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

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

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ret = AvahiService.rename(self)

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ret = AvahiService.rename(self, *args, **kwargs)

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syslogger.setFormatter(logging.Formatter

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

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

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

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.format(self.name)))

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return ret

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def timedelta_to_milliseconds(td):

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"Convert a datetime.timedelta() to milliseconds"

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

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+ (td.seconds * 1000)

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+ (td.microseconds // 1000))

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class Client(object):

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

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runtime_expansions: Allowed attributes for runtime expansion.

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

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disabled, or None

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server_settings: The server_settings dict from main()

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"""

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runtime_expansions = ("approval_delay", "approval_duration",

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

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

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

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

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"last_approval_request", "last_checked_ok",

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

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

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"extended_timeout": "15m",

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"interval": "2m",

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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": "0s",

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"approval_duration": "1s",

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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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def extended_timeout_milliseconds(self):

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"Return the 'extended_timeout' attribute in milliseconds"

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return timedelta_to_milliseconds(self.extended_timeout)

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def interval_milliseconds(self):

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"Return the 'interval' attribute in milliseconds"

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return timedelta_to_milliseconds(self.interval)

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def approval_delay_milliseconds(self):

460

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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"rb") as secfile:

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

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else:

492

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

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

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501

.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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client["last_checker_status"] = -2

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return settings

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

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self.name = name

519

if server_settings is None:

520

server_settings = {}

521

self.server_settings = server_settings

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522

# adding all client settings

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for setting, value in settings.iteritems():

523

for setting, value in settings.items():

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setattr(self, setting, value)

518

525

519

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if self.enabled:

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532

else:

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533

self.last_enabled = None

527

534

self.expires = None

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

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# Uppercase and remove spaces from fingerprint for later

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# comparison purposes with return value from the fingerprint()

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

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

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datetime.datetime.utcnow())

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# attributes specific for this server instance

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self.checker = None

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self.checker_initiator_tag = None

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

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# Already enabled

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return

570

self.send_changedstate()

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577

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

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self.enabled = True

573

579

self.last_enabled = datetime.datetime.utcnow()

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self.init_checker()

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self.send_changedstate()

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582

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def disable(self, quiet=True):

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584

"""Disable this client."""

578

585

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

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return False

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if not quiet:

581

self.send_changedstate()

582

if not quiet:

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588

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

584

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

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

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590

gobject.source_remove(self.disable_initiator_tag)

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self.disable_initiator_tag = None

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592

self.expires = None

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

593

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

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594

gobject.source_remove(self.checker_initiator_tag)

590

595

self.checker_initiator_tag = None

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self.stop_checker()

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self.enabled = False

598

if not quiet:

599

self.send_changedstate()

593

600

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

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return False

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602

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def init_checker(self):

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607

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

601

608

# and every interval from then on.

609

if self.checker_initiator_tag is not None:

610

gobject.source_remove(self.checker_initiator_tag)

602

611

self.checker_initiator_tag = (gobject.timeout_add

603

(self.interval_milliseconds(),

612

(int(self.interval

613

.total_seconds() * 1000),

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614

self.start_checker))

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

616

if self.disable_initiator_tag is not None:

617

gobject.source_remove(self.disable_initiator_tag)

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618

self.disable_initiator_tag = (gobject.timeout_add

607

(self.timeout_milliseconds(),

608

self.disable))

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(int(self.timeout

620

.total_seconds() * 1000),

621

self.disable))

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622

# Also start a new checker *right now*.

610

623

self.start_checker()

611

624

639

652

timeout = self.timeout

640

653

if self.disable_initiator_tag is not None:

641

654

gobject.source_remove(self.disable_initiator_tag)

655

self.disable_initiator_tag = None

642

656

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

643

657

self.disable_initiator_tag = (gobject.timeout_add

644

(timedelta_to_milliseconds

645

(timeout), self.disable))

658

(int(timeout.total_seconds()

659

* 1000), self.disable))

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660

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

647

661

648

662

def need_approval(self):

654

668

If a checker already exists, leave it running and do

655

669

nothing."""

656

670

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

657

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

658

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

659

# client would inevitably timeout, since no checker would get

660

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

671

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

672

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

673

# would inevitably timeout, since no checker would get a

674

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

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675

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

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

663

677

# should be.

665

679

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

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680

try:

667

681

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

668

except (AttributeError, OSError) as error:

669

if (isinstance(error, OSError)

670

and error.errno != errno.ECHILD):

671

raise error

682

except AttributeError:

683

pass

684

except OSError as error:

685

if error.errno != errno.ECHILD:

686

raise

672

687

else:

673

688

if pid:

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689

logger.warning("Checker was a zombie")

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692

self.current_checker_command)

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693

# Start a new checker if needed

679

694

if self.checker is None:

695

# Escape attributes for the shell

696

escaped_attrs = { attr:

697

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

698

for attr in self.runtime_expansions }

680

699

try:

681

# In case checker_command has exactly one % operator

682

command = self.checker_command % self.host

683

except TypeError:

684

# Escape attributes for the shell

685

escaped_attrs = dict(

686

(attr,

687

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

688

errors=

689

'replace')))

690

for attr in

691

self.runtime_expansions)

692

693

try:

694

command = self.checker_command % escaped_attrs

695

except TypeError as error:

696

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

697

self.checker_command, exc_info=error)

698

return True # Try again later

700

command = self.checker_command % escaped_attrs

701

except TypeError as error:

702

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

703

self.checker_command, exc_info=error)

704

return True # Try again later

699

705

self.current_checker_command = command

700

706

try:

701

707

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

704

710

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

705

711

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

706

712

# always replaced by /dev/null.)

713

# The exception is when not debugging but nevertheless

714

# running in the foreground; use the previously

715

# created wnull.

716

popen_args = {}

717

if (not self.server_settings["debug"]

718

and self.server_settings["foreground"]):

719

popen_args.update({"stdout": wnull,

720

"stderr": wnull })

707

721

self.checker = subprocess.Popen(command,

708

722

close_fds=True,

709

shell=True, cwd="/")

710

self.checker_callback_tag = (gobject.child_watch_add

711

(self.checker.pid,

712

self.checker_callback,

713

data=command))

714

# The checker may have completed before the gobject

715

# watch was added. Check for this.

716

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

717

if pid:

718

gobject.source_remove(self.checker_callback_tag)

719

self.checker_callback(pid, status, command)

723

shell=True, cwd="/",

724

**popen_args)

720

725

except OSError as error:

721

726

logger.error("Failed to start subprocess",

722

727

exc_info=error)

728

return True

729

self.checker_callback_tag = (gobject.child_watch_add

730

(self.checker.pid,

731

self.checker_callback,

732

data=command))

733

# The checker may have completed before the gobject

734

# watch was added. Check for this.

735

try:

736

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

737

except OSError as error:

738

if error.errno == errno.ECHILD:

739

# This should never happen

740

logger.error("Child process vanished",

741

exc_info=error)

742

return True

743

raise

744

if pid:

745

gobject.source_remove(self.checker_callback_tag)

746

self.checker_callback(pid, status, command)

723

747

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

724

748

return True

725

749

758

782

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

759

783

if byte_arrays and signature != "ay":

760

784

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

761

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

785

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

762

786

def decorator(func):

763

787

func._dbus_is_property = True

764

788

func._dbus_interface = dbus_interface

773

797

774

798

775

799

def dbus_interface_annotations(dbus_interface):

776

"""Decorator for marking functions returning interface annotations.

800

"""Decorator for marking functions returning interface annotations

777

801

778

802

Usage:

779

803

795

819

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

796

820

Usage:

797

821

822

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

823

"org.freedesktop.DBus.Property."

824

"EmitsChangedSignal": "false"})

798

825

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

799

826

access="r")

800

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

801

"org.freedesktop.DBus.Property."

802

"EmitsChangedSignal": "false"})

803

827

def Property_dbus_property(self):

804

828

return dbus.Boolean(False)

805

829

"""

812

836

class DBusPropertyException(dbus.exceptions.DBusException):

813

837

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

814

838

"""

815

def __unicode__(self):

816

return unicode(str(self))

817

839

pass

818

840

819

841

class DBusPropertyAccessException(DBusPropertyException):

820

842

"""A property's access permissions disallows an operation.

843

865

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

844

866

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

845

867

"""

846

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

868

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

847

869

False)

848

870

849

871

def _get_all_dbus_things(self, thing):

898

920

# The byte_arrays option is not supported yet on

899

921

# signatures other than "ay".

900

922

if prop._dbus_signature != "ay":

901

raise ValueError

923

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

924

"'ay' signature {!r}"

925

.format(prop._dbus_signature))

902

926

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

903

927

for byte in value))

904

928

prop(value)

928

952

value.variant_level+1)

929

953

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

930

954

955

@dbus.service.signal(dbus.PROPERTIES_IFACE, signature="sa{sv}as")

956

def PropertiesChanged(self, interface_name, changed_properties,

957

invalidated_properties):

958

"""Standard D-Bus PropertiesChanged() signal, see D-Bus

959

standard.

960

"""

961

pass

962

931

963

@dbus.service.method(dbus.INTROSPECTABLE_IFACE,

932

964

out_signature="s",

933

965

path_keyword='object_path',

968

1000

(prop,

969

1001

"_dbus_annotations",

970

1002

{}))

971

for name, value in annots.iteritems():

1003

for name, value in annots.items():

972

1004

ann_tag = document.createElement(

973

1005

"annotation")

974

1006

ann_tag.setAttribute("name", name)

976

1008

tag.appendChild(ann_tag)

977

1009

# Add interface annotation tags

978

1010

for annotation, value in dict(

979

itertools.chain(

980

*(annotations().iteritems()

981

for name, annotations in

982

self._get_all_dbus_things("interface")

983

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

984

))).iteritems():

1011

itertools.chain.from_iterable(

1012

annotations().items()

1013

for name, annotations in

1014

self._get_all_dbus_things("interface")

1015

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

1016

)).items():

985

1017

ann_tag = document.createElement("annotation")

986

1018

ann_tag.setAttribute("name", annotation)

987

1019

ann_tag.setAttribute("value", value)

1010

1042

return xmlstring

1011

1043

1012

1044

1013

def datetime_to_dbus (dt, variant_level=0):

1045

def datetime_to_dbus(dt, variant_level=0):

1014

1046

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

1015

1047

if dt is None:

1016

1048

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

1018

1050

variant_level=variant_level)

1019

1051

1020

1052

1021

class AlternateDBusNamesMetaclass(DBusObjectWithProperties

1022

.__metaclass__):

1023

"""Applied to an empty subclass of a D-Bus object, this metaclass

1024

will add additional D-Bus attributes matching a certain pattern.

1053

def alternate_dbus_interfaces(alt_interface_names, deprecate=True):

1054

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

1055

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

1056

interface names according to the "alt_interface_names" mapping.

1057

Usage:

1058

1059

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

1060

"net.example.AlternateInterface"})

1061

class SampleDBusObject(dbus.service.Object):

1062

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

1063

def SampleDBusMethod():

1064

pass

1065

1066

The above "SampleDBusMethod" on "SampleDBusObject" will be

1067

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

1068

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

1069

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

1070

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

1071

1072

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

1073

(from DBusObjectWithProperties) and interfaces (from the

1074

dbus_interface_annotations decorator).

1025

1075

"""

1026

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

1027

# Go through all the base classes which could have D-Bus

1028

# methods, signals, or properties in them

1029

old_interface_names = []

1030

for base in (b for b in bases

1031

if issubclass(b, dbus.service.Object)):

1032

# Go though all attributes of the base class

1033

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

1076

def wrapper(cls):

1077

for orig_interface_name, alt_interface_name in (

1078

alt_interface_names.items()):

1079

attr = {}

1080

interface_names = set()

1081

# Go though all attributes of the class

1082

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

1034

1083

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

1035

1084

# with the wrong interface name

1036

1085

if (not hasattr(attribute, "_dbus_interface")

1037

1086

or not attribute._dbus_interface

1038

.startswith("se.recompile.Mandos")):

1087

.startswith(orig_interface_name)):

1039

1088

continue

1040

1089

# Create an alternate D-Bus interface name based on

1041

1090

# the current name

1042

1091

alt_interface = (attribute._dbus_interface

1043

.replace("se.recompile.Mandos",

1044

"se.bsnet.fukt.Mandos"))

1045

if alt_interface != attribute._dbus_interface:

1046

old_interface_names.append(alt_interface)

1092

.replace(orig_interface_name,

1093

alt_interface_name))

1094

interface_names.add(alt_interface)

1047

1095

# Is this a D-Bus signal?

1048

1096

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

1049

# Extract the original non-method function by

1050

# black magic

1097

# Extract the original non-method undecorated

1098

# function by black magic

1051

1099

nonmethod_func = (dict(

1052

1100

zip(attribute.func_code.co_freevars,

1053

1101

attribute.__closure__))["func"]

1071

1119

except AttributeError:

1072

1120

pass

1073

1121

# Define a creator of a function to call both the

1074

# old and new functions, so both the old and new

1075

# signals gets sent when the function is called

1122

# original and alternate functions, so both the

1123

# original and alternate signals gets sent when

1124

# the function is called

1076

1125

def fixscope(func1, func2):

1077

1126

"""This function is a scope container to pass

1078

1127

func1 and func2 to the "call_both" function

1085

1134

return call_both

1086

1135

# Create the "call_both" function and add it to

1087

1136

# the class

1088

attr[attrname] = fixscope(attribute,

1089

new_function)

1137

attr[attrname] = fixscope(attribute, new_function)

1090

1138

# Is this a D-Bus method?

1091

1139

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

1092

1140

# Create a new, but exactly alike, function

1148

1196

attribute.func_name,

1149

1197

attribute.func_defaults,

1150

1198

attribute.func_closure)))

1151

# Deprecate all old interfaces

1152

basename="_AlternateDBusNamesMetaclass_interface_annotation{0}"

1153

for old_interface_name in old_interface_names:

1154

@dbus_interface_annotations(old_interface_name)

1155

def func(self):

1156

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

1157

# Find an unused name

1158

for aname in (basename.format(i) for i in

1159

itertools.count()):

1160

if aname not in attr:

1161

attr[aname] = func

1162

break

1163

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

1164

1165

1199

if deprecate:

1200

# Deprecate all alternate interfaces

1201

iname="_AlternateDBusNames_interface_annotation{}"

1202

for interface_name in interface_names:

1203

@dbus_interface_annotations(interface_name)

1204

def func(self):

1205

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

1206

"true" }

1207

# Find an unused name

1208

for aname in (iname.format(i)

1209

for i in itertools.count()):

1210

if aname not in attr:

1211

attr[aname] = func

1212

break

1213

if interface_names:

1214

# Replace the class with a new subclass of it with

1215

# methods, signals, etc. as created above.

1216

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

1217

(cls,), attr)

1218

return cls

1219

return wrapper

1220

1221

1222

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

1223

"se.bsnet.fukt.Mandos"})

1166

1224

class ClientDBus(Client, DBusObjectWithProperties):

1167

1225

"""A Client class using D-Bus

1168

1226

1174

1232

runtime_expansions = (Client.runtime_expansions

1175

1233

+ ("dbus_object_path",))

1176

1234

1235

_interface = "se.recompile.Mandos.Client"

1236

1177

1237

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

1178

1238

1179

1239

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

1181

1241

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

1182

1242

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

1183

1243

# the D-Bus

1184

client_object_name = unicode(self.name).translate(

1244

client_object_name = str(self.name).translate(

1185

1245

{ord("."): ord("_"),

1186

1246

ord("-"): ord("_")})

1187

1247

self.dbus_object_path = (dbus.ObjectPath

1188

1248

("/clients/" + client_object_name))

1189

1249

DBusObjectWithProperties.__init__(self, self.bus,

1190

1250

self.dbus_object_path)

1191

1251

1192

1252

def notifychangeproperty(transform_func,

1193

1253

dbus_name, type_func=lambda x: x,

1194

variant_level=1):

1254

variant_level=1, invalidate_only=False,

1255

_interface=_interface):

1195

1256

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

1196

1257

its changes to DBus.

1197

1258

1202

1263

to the D-Bus. Default: no transform

1203

1264

variant_level: D-Bus variant level. Default: 1

1204

1265

"""

1205

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

1266

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

1206

1267

def setter(self, value):

1207

1268

if hasattr(self, "dbus_object_path"):

1208

1269

if (not hasattr(self, attrname) or

1209

1270

type_func(getattr(self, attrname, None))

1210

1271

!= type_func(value)):

1211

dbus_value = transform_func(type_func(value),

1212

variant_level

1213

=variant_level)

1214

self.PropertyChanged(dbus.String(dbus_name),

1215

dbus_value)

1272

if invalidate_only:

1273

self.PropertiesChanged(_interface,

1274

dbus.Dictionary(),

1275

dbus.Array

1276

((dbus_name,)))

1277

else:

1278

dbus_value = transform_func(type_func(value),

1279

variant_level

1280

=variant_level)

1281

self.PropertyChanged(dbus.String(dbus_name),

1282

dbus_value)

1283

self.PropertiesChanged(_interface,

1284

dbus.Dictionary({

1285

dbus.String(dbus_name):

1286

dbus_value }), dbus.Array())

1216

1287

setattr(self, attrname, value)

1217

1288

1218

1289

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

1219

1290

1220

1221

1291

expires = notifychangeproperty(datetime_to_dbus, "Expires")

1222

1292

approvals_pending = notifychangeproperty(dbus.Boolean,

1223

1293

"ApprovalPending",

1239

1309

approval_delay = notifychangeproperty(dbus.UInt64,

1240

1310

"ApprovalDelay",

1241

1311

type_func =

1242

timedelta_to_milliseconds)

1312

lambda td: td.total_seconds()

1313

* 1000)

1243

1314

approval_duration = notifychangeproperty(

1244

1315

dbus.UInt64, "ApprovalDuration",

1245

type_func = timedelta_to_milliseconds)

1316

type_func = lambda td: td.total_seconds() * 1000)

1246

1317

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

1247

1318

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

1248

type_func =

1249

timedelta_to_milliseconds)

1319

type_func = lambda td:

1320

td.total_seconds() * 1000)

1250

1321

extended_timeout = notifychangeproperty(

1251

1322

dbus.UInt64, "ExtendedTimeout",

1252

type_func = timedelta_to_milliseconds)

1323

type_func = lambda td: td.total_seconds() * 1000)

1253

1324

interval = notifychangeproperty(dbus.UInt64,

1254

1325

"Interval",

1255

1326

type_func =

1256

timedelta_to_milliseconds)

1327

lambda td: td.total_seconds()

1328

* 1000)

1257

1329

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

1330

secret = notifychangeproperty(dbus.ByteArray, "Secret",

1331

invalidate_only=True)

1258

1332

1259

1333

del notifychangeproperty

1260

1334

1287

1361

*args, **kwargs)

1288

1362

1289

1363

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

1290

old_checker = self.checker

1291

if self.checker is not None:

1292

old_checker_pid = self.checker.pid

1293

else:

1294

old_checker_pid = None

1364

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

1295

1365

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

1296

1366

# Only if new checker process was started

1297

1367

if (self.checker is not None

1305

1375

return False

1306

1376

1307

1377

def approve(self, value=True):

1308

self.send_changedstate()

1309

1378

self.approved = value

1310

gobject.timeout_add(timedelta_to_milliseconds

1311

(self.approval_duration),

1312

self._reset_approved)

1313

1379

gobject.timeout_add(int(self.approval_duration.total_seconds()

1380

* 1000), self._reset_approved)

1381

self.send_changedstate()

1314

1382

1315

1383

## D-Bus methods, signals & properties

1316

_interface = "se.recompile.Mandos.Client"

1317

1384

1318

1385

## Interfaces

1319

1386

1320

@dbus_interface_annotations(_interface)

1321

def _foo(self):

1322

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

1323

"false"}

1324

1325

1387

## Signals

1326

1388

1327

1389

# CheckerCompleted - signal

1337

1399

pass

1338

1400

1339

1401

# PropertyChanged - signal

1402

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

1340

1403

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

1341

1404

def PropertyChanged(self, property, value):

1342

1405

"D-Bus signal"

1418

1481

access="readwrite")

1419

1482

def ApprovalDelay_dbus_property(self, value=None):

1420

1483

if value is None: # get

1421

return dbus.UInt64(self.approval_delay_milliseconds())

1484

return dbus.UInt64(self.approval_delay.total_seconds()

1485

* 1000)

1422

1486

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

1423

1487

1424

1488

# ApprovalDuration - property

1426

1490

access="readwrite")

1427

1491

def ApprovalDuration_dbus_property(self, value=None):

1428

1492

if value is None: # get

1429

return dbus.UInt64(timedelta_to_milliseconds(

1430

self.approval_duration))

1493

return dbus.UInt64(self.approval_duration.total_seconds()

1494

* 1000)

1431

1495

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

1432

1496

1433

1497

# Name - property

1446

1510

def Host_dbus_property(self, value=None):

1447

1511

if value is None: # get

1448

1512

return dbus.String(self.host)

1449

self.host = unicode(value)

1513

self.host = str(value)

1450

1514

1451

1515

# Created - property

1452

1516

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

1499

1563

access="readwrite")

1500

1564

def Timeout_dbus_property(self, value=None):

1501

1565

if value is None: # get

1502

return dbus.UInt64(self.timeout_milliseconds())

1566

return dbus.UInt64(self.timeout.total_seconds() * 1000)

1567

old_timeout = self.timeout

1503

1568

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

1504

# Reschedule timeout

1569

# Reschedule disabling

1505

1570

if self.enabled:

1506

1571

now = datetime.datetime.utcnow()

1507

time_to_die = timedelta_to_milliseconds(

1508

(self.last_checked_ok + self.timeout) - now)

1509

if time_to_die <= 0:

1572

self.expires += self.timeout - old_timeout

1573

if self.expires <= now:

1510

1574

# The timeout has passed

1511

1575

self.disable()

1512

1576

else:

1513

self.expires = (now +

1514

datetime.timedelta(milliseconds =

1515

time_to_die))

1516

1577

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

1517

1578

is None):

1518

1579

return

1519

1580

gobject.source_remove(self.disable_initiator_tag)

1520

self.disable_initiator_tag = (gobject.timeout_add

1521

(time_to_die,

1522

self.disable))

1581

self.disable_initiator_tag = (

1582

gobject.timeout_add(

1583

int((self.expires - now).total_seconds()

1584

* 1000), self.disable))

1523

1585

1524

1586

# ExtendedTimeout - property

1525

1587

@dbus_service_property(_interface, signature="t",

1526

1588

access="readwrite")

1527

1589

def ExtendedTimeout_dbus_property(self, value=None):

1528

1590

if value is None: # get

1529

return dbus.UInt64(self.extended_timeout_milliseconds())

1591

return dbus.UInt64(self.extended_timeout.total_seconds()

1592

* 1000)

1530

1593

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

1531

1594

1532

1595

# Interval - property

1534

1597

access="readwrite")

1535

1598

def Interval_dbus_property(self, value=None):

1536

1599

if value is None: # get

1537

return dbus.UInt64(self.interval_milliseconds())

1600

return dbus.UInt64(self.interval.total_seconds() * 1000)

1538

1601

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

1539

1602

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

1540

1603

return

1551

1614

def Checker_dbus_property(self, value=None):

1552

1615

if value is None: # get

1553

1616

return dbus.String(self.checker_command)

1554

self.checker_command = unicode(value)

1617

self.checker_command = str(value)

1555

1618

1556

1619

# CheckerRunning - property

1557

1620

@dbus_service_property(_interface, signature="b",

1573

1636

@dbus_service_property(_interface, signature="ay",

1574

1637

access="write", byte_arrays=True)

1575

1638

def Secret_dbus_property(self, value):

1576

self.secret = str(value)

1639

self.secret = bytes(value)

1577

1640

1578

1641

del _interface

1579

1642

1604

1667

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

1605

1668

1606

1669

1607

class ClientDBusTransitional(ClientDBus):

1608

__metaclass__ = AlternateDBusNamesMetaclass

1609

1610

1611

1670

class ClientHandler(socketserver.BaseRequestHandler, object):

1612

1671

"""A class to handle client connections.

1613

1672

1617

1676

def handle(self):

1618

1677

with contextlib.closing(self.server.child_pipe) as child_pipe:

1619

1678

logger.info("TCP connection from: %s",

1620

unicode(self.client_address))

1679

str(self.client_address))

1621

1680

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

1622

1681

self.server.child_pipe.fileno())

1623

1682

1649

1708

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

1650

1709

try:

1651

1710

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

1652

raise RuntimeError

1711

raise RuntimeError(line)

1653

1712

except (ValueError, IndexError, RuntimeError) as error:

1654

1713

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

1655

1714

return

1704

1763

if self.server.use_dbus:

1705

1764

# Emit D-Bus signal

1706

1765

client.NeedApproval(

1707

client.approval_delay_milliseconds(),

1708

client.approved_by_default)

1766

client.approval_delay.total_seconds()

1767

* 1000, client.approved_by_default)

1709

1768

else:

1710

1769

logger.warning("Client %s was not approved",

1711

1770

client.name)

1717

1776

#wait until timeout or approved

1718

1777

time = datetime.datetime.now()

1719

1778

client.changedstate.acquire()

1720

(client.changedstate.wait

1721

(float(client.timedelta_to_milliseconds(delay)

1722

/ 1000)))

1779

client.changedstate.wait(delay.total_seconds())

1723

1780

client.changedstate.release()

1724

1781

time2 = datetime.datetime.now()

1725

1782

if (time2 - time) >= delay:

1741

1798

try:

1742

1799

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

1743

1800

except gnutls.errors.GNUTLSError as error:

1744

logger.warning("gnutls send failed")

1801

logger.warning("gnutls send failed",

1802

exc_info=error)

1745

1803

return

1746

1804

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

1747

1805

sent, len(client.secret)

1761

1819

try:

1762

1820

session.bye()

1763

1821

except gnutls.errors.GNUTLSError as error:

1764

logger.warning("GnuTLS bye failed")

1822

logger.warning("GnuTLS bye failed",

1823

exc_info=error)

1765

1824

1766

1825

@staticmethod

1767

1826

def peer_certificate(session):

1839

1898

def process_request(self, request, address):

1840

1899

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

1841

1900

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

1842

args = (request,

1843

address))

1901

args = (request, address))

1844

1902

proc.start()

1845

1903

return proc

1846

1904

1861

1919

1862

1920

def add_pipe(self, parent_pipe, proc):

1863

1921

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

1864

raise NotImplementedError

1922

raise NotImplementedError()

1865

1923

1866

1924

1867

1925

class IPv6_TCPServer(MultiprocessingMixInWithPipe,

1874

1932

use_ipv6: Boolean; to use IPv6 or not

1875

1933

"""

1876

1934

def __init__(self, server_address, RequestHandlerClass,

1877

interface=None, use_ipv6=True):

1935

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

1936

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

1937

creating a new one with socket.socket().

1938

"""

1878

1939

self.interface = interface

1879

1940

if use_ipv6:

1880

1941

self.address_family = socket.AF_INET6

1942

if socketfd is not None:

1943

# Save the file descriptor

1944

self.socketfd = socketfd

1945

# Save the original socket.socket() function

1946

self.socket_socket = socket.socket

1947

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

1948

#

1949

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

1950

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

1951

# patching socket.socket.)

1952

#

1953

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

1954

@functools.wraps(socket.socket)

1955

def socket_wrapper(*args, **kwargs):

1956

# Restore original function so subsequent calls are

1957

# not affected.

1958

socket.socket = self.socket_socket

1959

del self.socket_socket

1960

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

1961

# saved file descriptor.

1962

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

1963

# Replace socket.socket() function with wrapper

1964

socket.socket = socket_wrapper

1965

# The socketserver.TCPServer.__init__ will call

1966

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

1967

# socket_wrapper(), if socketfd was set.

1881

1968

socketserver.TCPServer.__init__(self, server_address,

1882

1969

RequestHandlerClass)

1970

1883

1971

def server_bind(self):

1884

1972

"""This overrides the normal server_bind() function

1885

1973

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

1893

1981

try:

1894

1982

self.socket.setsockopt(socket.SOL_SOCKET,

1895

1983

SO_BINDTODEVICE,

1896

str(self.interface

1897

+ '\0'))

1984

(self.interface + "\0")

1985

.encode("utf-8"))

1898

1986

except socket.error as error:

1899

if error[0] == errno.EPERM:

1900

logger.error("No permission to"

1901

" bind to interface %s",

1902

self.interface)

1903

elif error[0] == errno.ENOPROTOOPT:

1987

if error.errno == errno.EPERM:

1988

logger.error("No permission to bind to"

1989

" interface %s", self.interface)

1990

elif error.errno == errno.ENOPROTOOPT:

1904

1991

logger.error("SO_BINDTODEVICE not available;"

1905

1992

" cannot bind to interface %s",

1906

1993

self.interface)

1994

elif error.errno == errno.ENODEV:

1995

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

1996

" cannot bind", self.interface)

1907

1997

else:

1908

1998

raise

1909

1999

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

1912

2002

if self.address_family == socket.AF_INET6:

1913

2003

any_address = "::" # in6addr_any

1914

2004

else:

1915

any_address = socket.INADDR_ANY

2005

any_address = "0.0.0.0" # INADDR_ANY

1916

2006

self.server_address = (any_address,

1917

2007

self.server_address[1])

1918

2008

elif not self.server_address[1]:

1939

2029

"""

1940

2030

def __init__(self, server_address, RequestHandlerClass,

1941

2031

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

1942

gnutls_priority=None, use_dbus=True):

2032

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

1943

2033

self.enabled = False

1944

2034

self.clients = clients

1945

2035

if self.clients is None:

1949

2039

IPv6_TCPServer.__init__(self, server_address,

1950

2040

RequestHandlerClass,

1951

2041

interface = interface,

1952

use_ipv6 = use_ipv6)

2042

use_ipv6 = use_ipv6,

2043

socketfd = socketfd)

1953

2044

def server_activate(self):

1954

2045

if self.enabled:

1955

2046

return socketserver.TCPServer.server_activate(self)

1968

2059

1969

2060

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

1970

2061

proc = None, client_object=None):

1971

condition_names = {

1972

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

1973

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

1974

# blocking).

1975

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

1976

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

1977

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

1978

# broken, usually for pipes and

1979

# sockets).

1980

}

1981

conditions_string = ' | '.join(name

1982

for cond, name in

1983

condition_names.iteritems()

1984

if cond & condition)

1985

2062

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

1986

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

2063

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

1987

2064

# Wait for other process to exit

1988

2065

proc.join()

1989

2066

return False

2047

2124

return True

2048

2125

2049

2126

2127

def rfc3339_duration_to_delta(duration):

2128

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

2129

2130

>>> rfc3339_duration_to_delta("P7D")

2131

datetime.timedelta(7)

2132

>>> rfc3339_duration_to_delta("PT60S")

2133

datetime.timedelta(0, 60)

2134

>>> rfc3339_duration_to_delta("PT60M")

2135

datetime.timedelta(0, 3600)

2136

>>> rfc3339_duration_to_delta("PT24H")

2137

datetime.timedelta(1)

2138

>>> rfc3339_duration_to_delta("P1W")

2139

datetime.timedelta(7)

2140

>>> rfc3339_duration_to_delta("PT5M30S")

2141

datetime.timedelta(0, 330)

2142

>>> rfc3339_duration_to_delta("P1DT3M20S")

2143

datetime.timedelta(1, 200)

2144

"""

2145

2146

# Parsing an RFC 3339 duration with regular expressions is not

2147

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

2148

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

2149

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

2150

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

2151

# avoid excessive use of external libraries.

2152

2153

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

2154

Token = collections.namedtuple("Token",

2155

("regexp", # To match token; if

2156

# "value" is not None,

2157

# must have a "group"

2158

# containing digits

2159

"value", # datetime.timedelta or

2160

# None

2161

"followers")) # Tokens valid after

2162

# this token

2163

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

2164

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

2165

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

2166

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

2167

datetime.timedelta(seconds=1),

2168

frozenset((token_end,)))

2169

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

2170

datetime.timedelta(minutes=1),

2171

frozenset((token_second, token_end)))

2172

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

2173

datetime.timedelta(hours=1),

2174

frozenset((token_minute, token_end)))

2175

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

2176

None,

2177

frozenset((token_hour, token_minute,

2178

token_second)))

2179

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

2180

datetime.timedelta(days=1),

2181

frozenset((token_time, token_end)))

2182

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

2183

datetime.timedelta(weeks=4),

2184

frozenset((token_day, token_end)))

2185

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

2186

datetime.timedelta(weeks=52),

2187

frozenset((token_month, token_end)))

2188

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

2189

datetime.timedelta(weeks=1),

2190

frozenset((token_end,)))

2191

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

2192

frozenset((token_year, token_month,

2193

token_day, token_time,

2194

token_week)))

2195

# Define starting values

2196

value = datetime.timedelta() # Value so far

2197

found_token = None

2198

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

2199

s = duration # String left to parse

2200

# Loop until end token is found

2201

while found_token is not token_end:

2202

# Search for any currently valid tokens

2203

for token in followers:

2204

match = token.regexp.match(s)

2205

if match is not None:

2206

# Token found

2207

if token.value is not None:

2208

# Value found, parse digits

2209

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

2210

# Add to value so far

2211

value += factor * token.value

2212

# Strip token from string

2213

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

2214

# Go to found token

2215

found_token = token

2216

# Set valid next tokens

2217

followers = found_token.followers

2218

break

2219

else:

2220

# No currently valid tokens were found

2221

raise ValueError("Invalid RFC 3339 duration")

2222

# End token found

2223

return value

2224

2225

2050

2226

def string_to_delta(interval):

2051

2227

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

2052

2228

2063

2239

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

2064

2240

datetime.timedelta(0, 330)

2065

2241

"""

2242

2243

try:

2244

return rfc3339_duration_to_delta(interval)

2245

except ValueError:

2246

pass

2247

2066

2248

timevalue = datetime.timedelta(0)

2067

2249

for s in interval.split():

2068

2250

try:

2069

suffix = unicode(s[-1])

2251

suffix = s[-1]

2070

2252

value = int(s[:-1])

2071

2253

if suffix == "d":

2072

2254

delta = datetime.timedelta(value)

2079

2261

elif suffix == "w":

2080

2262

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

2081

2263

else:

2082

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

2264

raise ValueError("Unknown suffix {!r}"

2083

2265

.format(suffix))

2084

except (ValueError, IndexError) as e:

2266

except IndexError as e:

2085

2267

raise ValueError(*(e.args))

2086

2268

timevalue += delta

2087

2269

return timevalue

2102

2284

# Close all standard open file descriptors

2103

2285

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

2104

2286

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

2105

raise OSError(errno.ENODEV,

2106

"{0} not a character device"

2287

raise OSError(errno.ENODEV, "{} not a character device"

2107

2288

.format(os.devnull))

2108

2289

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

2109

2290

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

2119

2300

2120

2301

parser = argparse.ArgumentParser()

2121

2302

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

2122

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

2303

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

2123

2304

help="show version number and exit")

2124

2305

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

2125

2306

help="Bind to interface IF")

2131

2312

help="Run self-test")

2132

2313

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

2133

2314

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

2134

" to terminal")

2315

" to terminal", default=None)

2135

2316

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

2136

2317

help="Debug level for stdout output")

2137

2318

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

2144

2325

" files")

2145

2326

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

2146

2327

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

2147

" system bus interface")

2328

" system bus interface", default=None)

2148

2329

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

2149

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

2330

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

2331

default=None)

2150

2332

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

2151

2333

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

2152

" state")

2334

" state", default=None)

2335

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

2336

help="Specify a file descriptor to a network"

2337

" socket to use instead of creating one")

2153

2338

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

2154

2339

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

2340

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

2341

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

2342

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

2343

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

2344

default=None)

2155

2345

2156

2346

options = parser.parse_args()

2157

2347

2158

2348

if options.check:

2159

2349

import doctest

2160

doctest.testmod()

2161

sys.exit()

2350

fail_count, test_count = doctest.testmod()

2351

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

2162

2352

2163

2353

# Default values for config file for server-global settings

2164

2354

server_defaults = { "interface": "",

2166

2356

"port": "",

2167

2357

"debug": "False",

2168

2358

"priority":

2169

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

2359

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

2170

2360

"servicename": "Mandos",

2171

2361

"use_dbus": "True",

2172

2362

"use_ipv6": "True",

2173

2363

"debuglevel": "",

2174

2364

"restore": "True",

2175

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

2365

"socket": "",

2366

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

2367

"foreground": "False",

2368

"zeroconf": "True",

2176

2369

}

2177

2370

2178

2371

# Parse config file for server-global settings

2183

2376

# Convert the SafeConfigParser object to a dict

2184

2377

server_settings = server_config.defaults()

2185

2378

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

2186

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

2379

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

2187

2380

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

2188

2381

option)

2189

2382

if server_settings["port"]:

2190

2383

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

2191

2384

"port")

2385

if server_settings["socket"]:

2386

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

2387

"socket")

2388

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

2389

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

2390

# happen with a supplied network socket.

2391

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

2392

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

2393

["socket"])

2192

2394

del server_config

2193

2395

2194

2396

# Override the settings from the config file with command line

2196

2398

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

2197

2399

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

2198

2400

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

2199

"statedir"):

2401

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

2200

2402

value = getattr(options, option)

2201

2403

if value is not None:

2202

2404

server_settings[option] = value

2203

2405

del options

2204

2406

# Force all strings to be unicode

2205

2407

for option in server_settings.keys():

2206

if type(server_settings[option]) is str:

2207

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

2408

if isinstance(server_settings[option], bytes):

2409

server_settings[option] = (server_settings[option]

2410

.decode("utf-8"))

2411

# Force all boolean options to be boolean

2412

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

2413

"foreground", "zeroconf"):

2414

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

2415

# Debug implies foreground

2416

if server_settings["debug"]:

2417

server_settings["foreground"] = True

2208

2418

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

2209

2419

2210

2420

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

2211

2421

2422

if (not server_settings["zeroconf"] and

2423

not (server_settings["port"]

2424

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

2425

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

2426

" Zeroconf")

2427

2212

2428

# For convenience

2213

2429

debug = server_settings["debug"]

2214

2430

debuglevel = server_settings["debuglevel"]

2216

2432

use_ipv6 = server_settings["use_ipv6"]

2217

2433

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

2218

2434

stored_state_file)

2435

foreground = server_settings["foreground"]

2436

zeroconf = server_settings["zeroconf"]

2219

2437

2220

2438

if debug:

2221

2439

initlogger(debug, logging.DEBUG)

2228

2446

2229

2447

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

2230

2448

syslogger.setFormatter(logging.Formatter

2231

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

2449

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

2232

2450

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

2233

2451

.format(server_settings

2234

2452

["servicename"])))

2242

2460

global mandos_dbus_service

2243

2461

mandos_dbus_service = None

2244

2462

2463

socketfd = None

2464

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

2465

socketfd = server_settings["socket"]

2245

2466

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

2246

2467

server_settings["port"]),

2247

2468

ClientHandler,

2250

2471

use_ipv6=use_ipv6,

2251

2472

gnutls_priority=

2252

2473

server_settings["priority"],

2253

use_dbus=use_dbus)

2254

if not debug:

2255

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

2474

use_dbus=use_dbus,

2475

socketfd=socketfd)

2476

if not foreground:

2477

pidfilename = "/run/mandos.pid"

2478

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

2479

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

2480

pidfile = None

2256

2481

try:

2257

2482

pidfile = open(pidfilename, "w")

2258

except IOError:

2259

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

2483

except IOError as e:

2484

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

2485

exc_info=e)

2260

2486

2261

2487

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

2262

2488

try:

2272

2498

os.setgid(gid)

2273

2499

os.setuid(uid)

2274

2500

except OSError as error:

2275

if error[0] != errno.EPERM:

2276

raise error

2501

if error.errno != errno.EPERM:

2502

raise

2277

2503

2278

2504

if debug:

2279

2505

# Enable all possible GnuTLS debugging

2296

2522

os.close(null)

2297

2523

2298

2524

# Need to fork before connecting to D-Bus

2299

if not debug:

2525

if not foreground:

2300

2526

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

2301

2527

daemon()

2302

2528

2529

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

2530

# need to inform gobject that threads will be used.

2303

2531

gobject.threads_init()

2304

2532

2305

2533

global main_loop

2316

2544

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

2317

2545

do_not_queue=True))

2318

2546

except dbus.exceptions.NameExistsException as e:

2319

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

2547

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

2320

2548

use_dbus = False

2321

2549

server_settings["use_dbus"] = False

2322

2550

tcp_server.use_dbus = False

2323

protocol = avahi.PROTO_INET6 if use_ipv6 else avahi.PROTO_INET

2324

service = AvahiServiceToSyslog(name =

2325

server_settings["servicename"],

2326

servicetype = "_mandos._tcp",

2327

protocol = protocol, bus = bus)

2328

if server_settings["interface"]:

2329

service.interface = (if_nametoindex

2330

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

2551

if zeroconf:

2552

protocol = avahi.PROTO_INET6 if use_ipv6 else avahi.PROTO_INET

2553

service = AvahiServiceToSyslog(name =

2554

server_settings["servicename"],

2555

servicetype = "_mandos._tcp",

2556

protocol = protocol, bus = bus)

2557

if server_settings["interface"]:

2558

service.interface = (if_nametoindex

2559

(server_settings["interface"]

2560

.encode("utf-8")))

2331

2561

2332

2562

global multiprocessing_manager

2333

2563

multiprocessing_manager = multiprocessing.Manager()

2334

2564

2335

2565

client_class = Client

2336

2566

if use_dbus:

2337

client_class = functools.partial(ClientDBusTransitional,

2338

bus = bus)

2567

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

2339

2568

2340

2569

client_settings = Client.config_parser(client_config)

2341

2570

old_client_settings = {}

2342

2571

clients_data = {}

2343

2572

2573

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

2574

global wnull

2575

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

2576

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

2577

# mode

2578

if debug or not foreground:

2579

wnull.close()

2580

2344

2581

# Get client data and settings from last running state.

2345

2582

if server_settings["restore"]:

2346

2583

try:

2349

2586

(stored_state))

2350

2587

os.remove(stored_state_path)

2351

2588

except IOError as e:

2352

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

2353

.format(e))

2354

if e.errno != errno.ENOENT:

2589

if e.errno == errno.ENOENT:

2590

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

2591

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

2592

else:

2593

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

2594

exc_info=e)

2355

2595

raise

2356

2596

except EOFError as e:

2357

2597

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

2358

"EOFError: {0}".format(e))

2598

"EOFError:", exc_info=e)

2359

2599

2360

2600

with PGPEngine() as pgp:

2361

for client_name, client in clients_data.iteritems():

2601

for client_name, client in clients_data.items():

2602

# Skip removed clients

2603

if client_name not in client_settings:

2604

continue

2605

2362

2606

# Decide which value to use after restoring saved state.

2363

2607

# We have three different values: Old config file,

2364

2608

# new config file, and saved state.

2385

2629

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

2386

2630

if not client["last_checked_ok"]:

2387

2631

logger.warning(

2388

"disabling client {0} - Client never "

2632

"disabling client {} - Client never "

2389

2633

"performed a successful checker"

2390

2634

.format(client_name))

2391

2635

client["enabled"] = False

2392

2636

elif client["last_checker_status"] != 0:

2393

2637

logger.warning(

2394

"disabling client {0} - Client "

2395

"last checker failed with error code {1}"

2638

"disabling client {} - Client last"

2639

" checker failed with error code {}"

2396

2640

.format(client_name,

2397

2641

client["last_checker_status"]))

2398

2642

client["enabled"] = False

2401

2645

.utcnow()

2402

2646

+ client["timeout"])

2403

2647

logger.debug("Last checker succeeded,"

2404

" keeping {0} enabled"

2648

" keeping {} enabled"

2405

2649

.format(client_name))

2406

2650

try:

2407

2651

client["secret"] = (

2410

2654

["secret"]))

2411

2655

except PGPError:

2412

2656

# If decryption fails, we use secret from new settings

2413

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

2657

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

2414

2658

.format(client_name))

2415

2659

client["secret"] = (

2416

2660

client_settings[client_name]["secret"])

2417

2418

2661

2419

2662

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

2420

2663

for client_name in (set(old_client_settings)

2423

2666

for client_name in (set(client_settings)

2424

2667

- set(old_client_settings)):

2425

2668

clients_data[client_name] = client_settings[client_name]

2426

2669

2427

2670

# Create all client objects

2428

for client_name, client in clients_data.iteritems():

2671

for client_name, client in clients_data.items():

2429

2672

tcp_server.clients[client_name] = client_class(

2430

name = client_name, settings = client)

2673

name = client_name, settings = client,

2674

server_settings = server_settings)

2431

2675

2432

2676

if not tcp_server.clients:

2433

2677

logger.warning("No clients defined")

2434

2435

if not debug:

2436

try:

2437

with pidfile:

2438

pid = os.getpid()

2439

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

2440

del pidfile

2441

except IOError:

2442

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

2443

pidfilename, pid)

2444

except NameError:

2445

# "pidfile" was never created

2446

pass

2678

2679

if not foreground:

2680

if pidfile is not None:

2681

try:

2682

with pidfile:

2683

pid = os.getpid()

2684

pidfile.write("{}\n".format(pid).encode("utf-8"))

2685

except IOError:

2686

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

2687

pidfilename, pid)

2688

del pidfile

2447

2689

del pidfilename

2448

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

2449

2690

2450

2691

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

2451

2692

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

2452

2693

2453

2694

if use_dbus:

2695

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

2696

"se.bsnet.fukt.Mandos"})

2454

2697

class MandosDBusService(DBusObjectWithProperties):

2455

2698

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

2456

2699

def __init__(self):

2490

2733

def GetAllClientsWithProperties(self):

2491

2734

"D-Bus method"

2492

2735

return dbus.Dictionary(

2493

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

2494

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

2736

{ c.dbus_object_path: c.GetAll("")

2737

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

2495

2738

signature="oa{sv}")

2496

2739

2497

2740

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

2510

2753

2511

2754

del _interface

2512

2755

2513

class MandosDBusServiceTransitional(MandosDBusService):

2514

__metaclass__ = AlternateDBusNamesMetaclass

2515

mandos_dbus_service = MandosDBusServiceTransitional()

2756

mandos_dbus_service = MandosDBusService()

2516

2757

2517

2758

def cleanup():

2518

2759

"Cleanup function; run on exit"

2519

service.cleanup()

2760

if zeroconf:

2761

service.cleanup()

2520

2762

2521

2763

multiprocessing.active_children()

2764

wnull.close()

2522

2765

if not (tcp_server.clients or client_settings):

2523

2766

return

2524

2767

2535

2778

2536

2779

# A list of attributes that can not be pickled

2537

2780

# + secret.

2538

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

2539

"checker"))

2781

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

2782

"checker", "server_settings" }

2540

2783

for name, typ in (inspect.getmembers

2541

2784

(dbus.service.Object)):

2542

2785

exclude.add(name)

2551

2794

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

2552

2795

2553

2796

try:

2554

tempfd, tempname = tempfile.mkstemp(suffix=".pickle",

2555

prefix="clients-",

2556

dir=os.path.dirname

2557

(stored_state_path))

2558

with os.fdopen(tempfd, "wb") as stored_state:

2797

with (tempfile.NamedTemporaryFile

2798

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

2799

dir=os.path.dirname(stored_state_path),

2800

delete=False)) as stored_state:

2559

2801

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

2802

tempname=stored_state.name

2560

2803

os.rename(tempname, stored_state_path)

2561

2804

except (IOError, OSError) as e:

2562

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

2563

.format(e))

2564

2805

if not debug:

2565

2806

try:

2566

2807

os.remove(tempname)

2567

2808

except NameError:

2568

2809

pass

2569

if e.errno not in set((errno.ENOENT, errno.EACCES,

2570

errno.EEXIST)):

2571

raise e

2810

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

2811

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

2812

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

2813

else:

2814

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

2815

exc_info=e)

2816

raise

2572

2817

2573

2818

# Delete all clients, and settings from config

2574

2819

while tcp_server.clients:

2598

2843

tcp_server.server_activate()

2599

2844

2600

2845

# Find out what port we got

2601

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

2846

if zeroconf:

2847

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

2602

2848

if use_ipv6:

2603

2849

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

2604

2850

" flowinfo %d, scope_id %d",

2610

2856

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

2611

2857

2612

2858

try:

2613

# From the Avahi example code

2614

try:

2615

service.activate()

2616

except dbus.exceptions.DBusException as error:

2617

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

2618

cleanup()

2619

sys.exit(1)

2620

# End of Avahi example code

2859

if zeroconf:

2860

# From the Avahi example code

2861

try:

2862

service.activate()

2863

except dbus.exceptions.DBusException as error:

2864

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

2865

cleanup()

2866

sys.exit(1)

2867

# End of Avahi example code

2621

2868

2622

2869

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

2623

2870

lambda *args, **kwargs: