/mandos/release : revision 237.7.113

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#!/usr/bin/python2.7

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#!/usr/bin/python

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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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if sys.version_info.major == 2:

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str = unicode

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version = "1.6.9"

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version = "1.5.3"

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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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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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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(b"16s16x", interface))

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interface_index = struct.unpack("I", ifreq[16:20])[0]

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

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

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**kwargs)

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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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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 <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, remove=True):

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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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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 = str(self.server

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.GetAlternativeServiceName(self.name))

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self.rename_count += 1

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self.name = unicode(self.server

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.GetAlternativeServiceName(self.name))

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

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self.name)

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if remove:

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

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self.cleanup()

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os._exit(1)

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self.rename_count += 1

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def remove(self):

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

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if self.entry_group_state_changed_match is not None:

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self.entry_group_state_changed_match = 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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str(error))

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

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.format(error))

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unicode(error))

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raise AvahiGroupError("State changed: %s"

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% unicode(error))

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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, *args, **kwargs):

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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, *args, **kwargs)

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ret = AvahiService.rename(self)

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syslogger.setFormatter(logging.Formatter

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

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

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

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"extended_timeout": "15m",

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"interval": "2m",

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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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"approval_delay": "0s",

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"approval_duration": "1s",

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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()

499

491

else:

500

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

501

.format(section))

492

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

493

% 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["last_checker_status"] = -2

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return settings

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

508

509

510

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

511

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

512

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

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attribute."""

518

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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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# adding all client settings

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for setting, value in settings.items():

516

for setting, value in settings.iteritems():

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setattr(self, setting, value)

525

518

526

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if self.enabled:

532

525

else:

533

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self.last_enabled = None

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527

self.expires = None

535

528

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

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530

# Uppercase and remove spaces from fingerprint for later

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531

# 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())

543

536

544

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# attributes specific for this server instance

545

538

self.checker = None

546

539

self.checker_initiator_tag = None

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567

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

575

568

# Already enabled

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569

return

570

self.send_changedstate()

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

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self.enabled = True

579

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self.last_enabled = datetime.datetime.utcnow()

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self.init_checker()

581

self.send_changedstate()

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583

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def disable(self, quiet=True):

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"""Disable this client."""

585

578

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

586

579

return False

587

580

if not quiet:

581

self.send_changedstate()

582

if not quiet:

588

583

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

589

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

584

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

590

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gobject.source_remove(self.disable_initiator_tag)

591

586

self.disable_initiator_tag = None

592

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self.expires = None

593

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

588

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

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gobject.source_remove(self.checker_initiator_tag)

595

590

self.checker_initiator_tag = None

596

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self.stop_checker()

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self.enabled = False

598

if not quiet:

599

self.send_changedstate()

600

593

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

601

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return False

602

595

606

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def init_checker(self):

607

600

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

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# and every interval from then on.

609

if self.checker_initiator_tag is not None:

610

gobject.source_remove(self.checker_initiator_tag)

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602

self.checker_initiator_tag = (gobject.timeout_add

612

(int(self.interval

613

.total_seconds() * 1000),

603

(self.interval_milliseconds(),

614

604

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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606

self.disable_initiator_tag = (gobject.timeout_add

619

(int(self.timeout

620

.total_seconds() * 1000),

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self.disable))

607

(self.timeout_milliseconds(),

608

self.disable))

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609

# Also start a new checker *right now*.

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610

self.start_checker()

624

611

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639

timeout = self.timeout

653

640

if self.disable_initiator_tag is not None:

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641

gobject.source_remove(self.disable_initiator_tag)

655

self.disable_initiator_tag = None

656

642

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

657

643

self.disable_initiator_tag = (gobject.timeout_add

658

(int(timeout.total_seconds()

659

* 1000), self.disable))

644

(timedelta_to_milliseconds

645

(timeout), self.disable))

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646

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

661

647

662

648

def need_approval(self):

668

654

If a checker already exists, leave it running and do

669

655

nothing."""

670

656

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

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

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

675

661

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

676

662

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

677

663

# should be.

679

665

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

680

666

try:

681

667

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

682

except AttributeError:

683

pass

684

except OSError as error:

685

if error.errno != errno.ECHILD:

686

raise

668

except (AttributeError, OSError) as error:

669

if (isinstance(error, OSError)

670

and error.errno != errno.ECHILD):

671

raise error

687

672

else:

688

673

if pid:

689

674

logger.warning("Checker was a zombie")

692

677

self.current_checker_command)

693

678

# Start a new checker if needed

694

679

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 }

699

680

try:

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

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

705

699

self.current_checker_command = command

706

700

try:

707

701

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

710

704

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

711

705

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

712

706

# 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 })

721

707

self.checker = subprocess.Popen(command,

722

708

close_fds=True,

723

shell=True, cwd="/",

724

**popen_args)

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)

725

720

except OSError as error:

726

721

logger.error("Failed to start subprocess",

727

722

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)

747

723

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

748

724

return True

749

725

782

758

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

783

759

if byte_arrays and signature != "ay":

784

760

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

785

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

761

" signature %r" % signature)

786

762

def decorator(func):

787

763

func._dbus_is_property = True

788

764

func._dbus_interface = dbus_interface

797

773

798

774

799

775

def dbus_interface_annotations(dbus_interface):

800

"""Decorator for marking functions returning interface annotations

776

"""Decorator for marking functions returning interface annotations.

801

777

802

778

Usage:

803

779

819

795

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

820

796

Usage:

821

797

822

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

823

"org.freedesktop.DBus.Property."

824

"EmitsChangedSignal": "false"})

825

798

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

826

799

access="r")

800

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

801

"org.freedesktop.DBus.Property."

802

"EmitsChangedSignal": "false"})

827

803

def Property_dbus_property(self):

828

804

return dbus.Boolean(False)

829

805

"""

836

812

class DBusPropertyException(dbus.exceptions.DBusException):

837

813

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

838

814

"""

839

pass

815

def __unicode__(self):

816

return unicode(str(self))

817

840

818

841

819

class DBusPropertyAccessException(DBusPropertyException):

842

820

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

865

843

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

866

844

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

867

845

"""

868

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

846

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

869

847

False)

870

848

871

849

def _get_all_dbus_things(self, thing):

920

898

# The byte_arrays option is not supported yet on

921

899

# signatures other than "ay".

922

900

if prop._dbus_signature != "ay":

923

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

924

"'ay' signature {!r}"

925

.format(prop._dbus_signature))

901

raise ValueError

926

902

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

927

903

for byte in value))

928

904

prop(value)

952

928

value.variant_level+1)

953

929

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

954

930

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

963

931

@dbus.service.method(dbus.INTROSPECTABLE_IFACE,

964

932

out_signature="s",

965

933

path_keyword='object_path',

1000

968

(prop,

1001

969

"_dbus_annotations",

1002

970

{}))

1003

for name, value in annots.items():

971

for name, value in annots.iteritems():

1004

972

ann_tag = document.createElement(

1005

973

"annotation")

1006

974

ann_tag.setAttribute("name", name)

1008

976

tag.appendChild(ann_tag)

1009

977

# Add interface annotation tags

1010

978

for annotation, value in dict(

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():

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():

1017

985

ann_tag = document.createElement("annotation")

1018

986

ann_tag.setAttribute("name", annotation)

1019

987

ann_tag.setAttribute("value", value)

1042

1010

return xmlstring

1043

1011

1044

1012

1045

def datetime_to_dbus(dt, variant_level=0):

1013

def datetime_to_dbus (dt, variant_level=0):

1046

1014

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

1047

1015

if dt is None:

1048

1016

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

1050

1018

variant_level=variant_level)

1051

1019

1052

1020

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).

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.

1075

1025

"""

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):

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):

1083

1034

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

1084

1035

# with the wrong interface name

1085

1036

if (not hasattr(attribute, "_dbus_interface")

1086

1037

or not attribute._dbus_interface

1087

.startswith(orig_interface_name)):

1038

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

1088

1039

continue

1089

1040

# Create an alternate D-Bus interface name based on

1090

1041

# the current name

1091

1042

alt_interface = (attribute._dbus_interface

1092

.replace(orig_interface_name,

1093

alt_interface_name))

1094

interface_names.add(alt_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)

1095

1047

# Is this a D-Bus signal?

1096

1048

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

1097

# Extract the original non-method undecorated

1098

# function by black magic

1049

# Extract the original non-method function by

1050

# black magic

1099

1051

nonmethod_func = (dict(

1100

1052

zip(attribute.func_code.co_freevars,

1101

1053

attribute.__closure__))["func"]

1119

1071

except AttributeError:

1120

1072

pass

1121

1073

# Define a creator of a function to call both the

1122

# original and alternate functions, so both the

1123

# original and alternate signals gets sent when

1124

# the function is called

1074

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

1075

# signals gets sent when the function is called

1125

1076

def fixscope(func1, func2):

1126

1077

"""This function is a scope container to pass

1127

1078

func1 and func2 to the "call_both" function

1134

1085

return call_both

1135

1086

# Create the "call_both" function and add it to

1136

1087

# the class

1137

attr[attrname] = fixscope(attribute, new_function)

1088

attr[attrname] = fixscope(attribute,

1089

new_function)

1138

1090

# Is this a D-Bus method?

1139

1091

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

1140

1092

# Create a new, but exactly alike, function

1196

1148

attribute.func_name,

1197

1149

attribute.func_defaults,

1198

1150

attribute.func_closure)))

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"})

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

1224

1166

class ClientDBus(Client, DBusObjectWithProperties):

1225

1167

"""A Client class using D-Bus

1226

1168

1232

1174

runtime_expansions = (Client.runtime_expansions

1233

1175

+ ("dbus_object_path",))

1234

1176

1235

_interface = "se.recompile.Mandos.Client"

1236

1237

1177

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

1238

1178

1239

1179

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

1241

1181

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

1242

1182

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

1243

1183

# the D-Bus

1244

client_object_name = str(self.name).translate(

1184

client_object_name = unicode(self.name).translate(

1245

1185

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

1246

1186

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

1247

1187

self.dbus_object_path = (dbus.ObjectPath

1248

1188

("/clients/" + client_object_name))

1249

1189

DBusObjectWithProperties.__init__(self, self.bus,

1250

1190

self.dbus_object_path)

1251

1191

1252

1192

def notifychangeproperty(transform_func,

1253

1193

dbus_name, type_func=lambda x: x,

1254

variant_level=1, invalidate_only=False,

1255

_interface=_interface):

1194

variant_level=1):

1256

1195

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

1257

1196

its changes to DBus.

1258

1197

1263

1202

to the D-Bus. Default: no transform

1264

1203

variant_level: D-Bus variant level. Default: 1

1265

1204

"""

1266

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

1205

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

1267

1206

def setter(self, value):

1268

1207

if hasattr(self, "dbus_object_path"):

1269

1208

if (not hasattr(self, attrname) or

1270

1209

type_func(getattr(self, attrname, None))

1271

1210

!= type_func(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())

1211

dbus_value = transform_func(type_func(value),

1212

variant_level

1213

=variant_level)

1214

self.PropertyChanged(dbus.String(dbus_name),

1215

dbus_value)

1287

1216

setattr(self, attrname, value)

1288

1217

1289

1218

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

1290

1219

1220

1291

1221

expires = notifychangeproperty(datetime_to_dbus, "Expires")

1292

1222

approvals_pending = notifychangeproperty(dbus.Boolean,

1293

1223

"ApprovalPending",

1309

1239

approval_delay = notifychangeproperty(dbus.UInt64,

1310

1240

"ApprovalDelay",

1311

1241

type_func =

1312

lambda td: td.total_seconds()

1313

* 1000)

1242

timedelta_to_milliseconds)

1314

1243

approval_duration = notifychangeproperty(

1315

1244

dbus.UInt64, "ApprovalDuration",

1316

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

1245

type_func = timedelta_to_milliseconds)

1317

1246

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

1318

1247

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

1319

type_func = lambda td:

1320

td.total_seconds() * 1000)

1248

type_func =

1249

timedelta_to_milliseconds)

1321

1250

extended_timeout = notifychangeproperty(

1322

1251

dbus.UInt64, "ExtendedTimeout",

1323

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

1252

type_func = timedelta_to_milliseconds)

1324

1253

interval = notifychangeproperty(dbus.UInt64,

1325

1254

"Interval",

1326

1255

type_func =

1327

lambda td: td.total_seconds()

1328

* 1000)

1256

timedelta_to_milliseconds)

1329

1257

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

1330

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

1331

invalidate_only=True)

1332

1258

1333

1259

del notifychangeproperty

1334

1260

1361

1287

*args, **kwargs)

1362

1288

1363

1289

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

1364

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

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

1365

1295

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

1366

1296

# Only if new checker process was started

1367

1297

if (self.checker is not None

1375

1305

return False

1376

1306

1377

1307

def approve(self, value=True):

1308

self.send_changedstate()

1378

1309

self.approved = value

1379

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

1380

* 1000), self._reset_approved)

1381

self.send_changedstate()

1310

gobject.timeout_add(timedelta_to_milliseconds

1311

(self.approval_duration),

1312

self._reset_approved)

1313

1382

1314

1383

1315

## D-Bus methods, signals & properties

1316

_interface = "se.recompile.Mandos.Client"

1384

1317

1385

1318

## Interfaces

1386

1319

1320

@dbus_interface_annotations(_interface)

1321

def _foo(self):

1322

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

1323

"false"}

1324

1387

1325

## Signals

1388

1326

1389

1327

# CheckerCompleted - signal

1399

1337

pass

1400

1338

1401

1339

# PropertyChanged - signal

1402

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

1403

1340

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

1404

1341

def PropertyChanged(self, property, value):

1405

1342

"D-Bus signal"

1481

1418

access="readwrite")

1482

1419

def ApprovalDelay_dbus_property(self, value=None):

1483

1420

if value is None: # get

1484

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

1485

* 1000)

1421

return dbus.UInt64(self.approval_delay_milliseconds())

1486

1422

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

1487

1423

1488

1424

# ApprovalDuration - property

1490

1426

access="readwrite")

1491

1427

def ApprovalDuration_dbus_property(self, value=None):

1492

1428

if value is None: # get

1493

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

1494

* 1000)

1429

return dbus.UInt64(timedelta_to_milliseconds(

1430

self.approval_duration))

1495

1431

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

1496

1432

1497

1433

# Name - property

1510

1446

def Host_dbus_property(self, value=None):

1511

1447

if value is None: # get

1512

1448

return dbus.String(self.host)

1513

self.host = str(value)

1449

self.host = unicode(value)

1514

1450

1515

1451

# Created - property

1516

1452

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

1563

1499

access="readwrite")

1564

1500

def Timeout_dbus_property(self, value=None):

1565

1501

if value is None: # get

1566

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

1567

old_timeout = self.timeout

1502

return dbus.UInt64(self.timeout_milliseconds())

1568

1503

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

1569

# Reschedule disabling

1504

# Reschedule timeout

1570

1505

if self.enabled:

1571

1506

now = datetime.datetime.utcnow()

1572

self.expires += self.timeout - old_timeout

1573

if self.expires <= now:

1507

time_to_die = timedelta_to_milliseconds(

1508

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

1509

if time_to_die <= 0:

1574

1510

# The timeout has passed

1575

1511

self.disable()

1576

1512

else:

1513

self.expires = (now +

1514

datetime.timedelta(milliseconds =

1515

time_to_die))

1577

1516

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

1578

1517

is None):

1579

1518

return

1580

1519

gobject.source_remove(self.disable_initiator_tag)

1581

self.disable_initiator_tag = (

1582

gobject.timeout_add(

1583

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

1584

* 1000), self.disable))

1520

self.disable_initiator_tag = (gobject.timeout_add

1521

(time_to_die,

1522

self.disable))

1585

1523

1586

1524

# ExtendedTimeout - property

1587

1525

@dbus_service_property(_interface, signature="t",

1588

1526

access="readwrite")

1589

1527

def ExtendedTimeout_dbus_property(self, value=None):

1590

1528

if value is None: # get

1591

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

1592

* 1000)

1529

return dbus.UInt64(self.extended_timeout_milliseconds())

1593

1530

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

1594

1531

1595

1532

# Interval - property

1597

1534

access="readwrite")

1598

1535

def Interval_dbus_property(self, value=None):

1599

1536

if value is None: # get

1600

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

1537

return dbus.UInt64(self.interval_milliseconds())

1601

1538

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

1602

1539

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

1603

1540

return

1614

1551

def Checker_dbus_property(self, value=None):

1615

1552

if value is None: # get

1616

1553

return dbus.String(self.checker_command)

1617

self.checker_command = str(value)

1554

self.checker_command = unicode(value)

1618

1555

1619

1556

# CheckerRunning - property

1620

1557

@dbus_service_property(_interface, signature="b",

1636

1573

@dbus_service_property(_interface, signature="ay",

1637

1574

access="write", byte_arrays=True)

1638

1575

def Secret_dbus_property(self, value):

1639

self.secret = bytes(value)

1576

self.secret = str(value)

1640

1577

1641

1578

del _interface

1642

1579

1667

1604

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

1668

1605

1669

1606

1607

class ClientDBusTransitional(ClientDBus):

1608

__metaclass__ = AlternateDBusNamesMetaclass

1609

1610

1670

1611

class ClientHandler(socketserver.BaseRequestHandler, object):

1671

1612

"""A class to handle client connections.

1672

1613

1676

1617

def handle(self):

1677

1618

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

1678

1619

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

1679

str(self.client_address))

1620

unicode(self.client_address))

1680

1621

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

1681

1622

self.server.child_pipe.fileno())

1682

1623

1708

1649

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

1709

1650

try:

1710

1651

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

1711

raise RuntimeError(line)

1652

raise RuntimeError

1712

1653

except (ValueError, IndexError, RuntimeError) as error:

1713

1654

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

1714

1655

return

1763

1704

if self.server.use_dbus:

1764

1705

# Emit D-Bus signal

1765

1706

client.NeedApproval(

1766

client.approval_delay.total_seconds()

1767

* 1000, client.approved_by_default)

1707

client.approval_delay_milliseconds(),

1708

client.approved_by_default)

1768

1709

else:

1769

1710

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

1770

1711

client.name)

1776

1717

#wait until timeout or approved

1777

1718

time = datetime.datetime.now()

1778

1719

client.changedstate.acquire()

1779

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

1720

(client.changedstate.wait

1721

(float(client.timedelta_to_milliseconds(delay)

1722

/ 1000)))

1780

1723

client.changedstate.release()

1781

1724

time2 = datetime.datetime.now()

1782

1725

if (time2 - time) >= delay:

1798

1741

try:

1799

1742

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

1800

1743

except gnutls.errors.GNUTLSError as error:

1801

logger.warning("gnutls send failed",

1802

exc_info=error)

1744

logger.warning("gnutls send failed")

1803

1745

return

1804

1746

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

1805

1747

sent, len(client.secret)

1819

1761

try:

1820

1762

session.bye()

1821

1763

except gnutls.errors.GNUTLSError as error:

1822

logger.warning("GnuTLS bye failed",

1823

exc_info=error)

1764

logger.warning("GnuTLS bye failed")

1824

1765

1825

1766

@staticmethod

1826

1767

def peer_certificate(session):

1898

1839

def process_request(self, request, address):

1899

1840

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

1900

1841

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

1901

args = (request, address))

1842

args = (request,

1843

address))

1902

1844

proc.start()

1903

1845

return proc

1904

1846

1919

1861

1920

1862

def add_pipe(self, parent_pipe, proc):

1921

1863

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

1922

raise NotImplementedError()

1864

raise NotImplementedError

1923

1865

1924

1866

1925

1867

class IPv6_TCPServer(MultiprocessingMixInWithPipe,

1932

1874

use_ipv6: Boolean; to use IPv6 or not

1933

1875

"""

1934

1876

def __init__(self, server_address, RequestHandlerClass,

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

"""

1877

interface=None, use_ipv6=True):

1939

1878

self.interface = interface

1940

1879

if use_ipv6:

1941

1880

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.

1968

1881

socketserver.TCPServer.__init__(self, server_address,

1969

1882

RequestHandlerClass)

1970

1971

1883

def server_bind(self):

1972

1884

"""This overrides the normal server_bind() function

1973

1885

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

1981

1893

try:

1982

1894

self.socket.setsockopt(socket.SOL_SOCKET,

1983

1895

SO_BINDTODEVICE,

1984

(self.interface + "\0")

1985

.encode("utf-8"))

1896

str(self.interface

1897

+ '\0'))

1986

1898

except socket.error as error:

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:

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:

1991

1904

logger.error("SO_BINDTODEVICE not available;"

1992

1905

" cannot bind to interface %s",

1993

1906

self.interface)

1994

elif error.errno == errno.ENODEV:

1995

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

1996

" cannot bind", self.interface)

1997

1907

else:

1998

1908

raise

1999

1909

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

2002

1912

if self.address_family == socket.AF_INET6:

2003

1913

any_address = "::" # in6addr_any

2004

1914

else:

2005

any_address = "0.0.0.0" # INADDR_ANY

1915

any_address = socket.INADDR_ANY

2006

1916

self.server_address = (any_address,

2007

1917

self.server_address[1])

2008

1918

elif not self.server_address[1]:

2029

1939

"""

2030

1940

def __init__(self, server_address, RequestHandlerClass,

2031

1941

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

2032

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

1942

gnutls_priority=None, use_dbus=True):

2033

1943

self.enabled = False

2034

1944

self.clients = clients

2035

1945

if self.clients is None:

2039

1949

IPv6_TCPServer.__init__(self, server_address,

2040

1950

RequestHandlerClass,

2041

1951

interface = interface,

2042

use_ipv6 = use_ipv6,

2043

socketfd = socketfd)

1952

use_ipv6 = use_ipv6)

2044

1953

def server_activate(self):

2045

1954

if self.enabled:

2046

1955

return socketserver.TCPServer.server_activate(self)

2059

1968

2060

1969

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

2061

1970

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)

2062

1985

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

2063

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

1986

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

2064

1987

# Wait for other process to exit

2065

1988

proc.join()

2066

1989

return False

2124

2047

return True

2125

2048

2126

2049

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

2226

2050

def string_to_delta(interval):

2227

2051

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

2228

2052

2239

2063

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

2240

2064

datetime.timedelta(0, 330)

2241

2065

"""

2242

2243

try:

2244

return rfc3339_duration_to_delta(interval)

2245

except ValueError:

2246

pass

2247

2248

2066

timevalue = datetime.timedelta(0)

2249

2067

for s in interval.split():

2250

2068

try:

2251

suffix = s[-1]

2069

suffix = unicode(s[-1])

2252

2070

value = int(s[:-1])

2253

2071

if suffix == "d":

2254

2072

delta = datetime.timedelta(value)

2261

2079

elif suffix == "w":

2262

2080

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

2263

2081

else:

2264

raise ValueError("Unknown suffix {!r}"

2265

.format(suffix))

2266

except IndexError as e:

2082

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

2083

except (ValueError, IndexError) as e:

2267

2084

raise ValueError(*(e.args))

2268

2085

timevalue += delta

2269

2086

return timevalue

2284

2101

# Close all standard open file descriptors

2285

2102

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

2286

2103

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

2287

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

2288

.format(os.devnull))

2104

raise OSError(errno.ENODEV,

2105

"%s not a character device"

2106

% os.devnull)

2289

2107

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

2290

2108

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

2291

2109

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

2300

2118

2301

2119

parser = argparse.ArgumentParser()

2302

2120

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

2303

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

2121

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

2304

2122

help="show version number and exit")

2305

2123

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

2306

2124

help="Bind to interface IF")

2312

2130

help="Run self-test")

2313

2131

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

2314

2132

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

2315

" to terminal", default=None)

2133

" to terminal")

2316

2134

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

2317

2135

help="Debug level for stdout output")

2318

2136

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

2325

2143

" files")

2326

2144

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

2327

2145

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

2328

" system bus interface", default=None)

2146

" system bus interface")

2329

2147

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

2330

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

2331

default=None)

2148

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

2332

2149

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

2333

2150

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

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")

2151

" state")

2338

2152

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

2339

2153

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)

2345

2154

2346

2155

options = parser.parse_args()

2347

2156

2348

2157

if options.check:

2349

2158

import doctest

2350

fail_count, test_count = doctest.testmod()

2351

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

2159

doctest.testmod()

2160

sys.exit()

2352

2161

2353

2162

# Default values for config file for server-global settings

2354

2163

server_defaults = { "interface": "",

2356

2165

"port": "",

2357

2166

"debug": "False",

2358

2167

"priority":

2359

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

2168

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

2360

2169

"servicename": "Mandos",

2361

2170

"use_dbus": "True",

2362

2171

"use_ipv6": "True",

2363

2172

"debuglevel": "",

2364

2173

"restore": "True",

2365

"socket": "",

2366

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

2367

"foreground": "False",

2368

"zeroconf": "True",

2174

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

2369

2175

}

2370

2176

2371

2177

# Parse config file for server-global settings

2376

2182

# Convert the SafeConfigParser object to a dict

2377

2183

server_settings = server_config.defaults()

2378

2184

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

2379

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

2185

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

2380

2186

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

2381

2187

option)

2382

2188

if server_settings["port"]:

2383

2189

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

2384

2190

"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"])

2394

2191

del server_config

2395

2192

2396

2193

# Override the settings from the config file with command line

2398

2195

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

2399

2196

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

2400

2197

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

2401

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

2198

"statedir"):

2402

2199

value = getattr(options, option)

2403

2200

if value is not None:

2404

2201

server_settings[option] = value

2405

2202

del options

2406

2203

# Force all strings to be unicode

2407

2204

for option in server_settings.keys():

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

2205

if type(server_settings[option]) is str:

2206

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

2418

2207

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

2419

2208

2420

2209

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

2421

2210

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

2428

2211

# For convenience

2429

2212

debug = server_settings["debug"]

2430

2213

debuglevel = server_settings["debuglevel"]

2432

2215

use_ipv6 = server_settings["use_ipv6"]

2433

2216

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

2434

2217

stored_state_file)

2435

foreground = server_settings["foreground"]

2436

zeroconf = server_settings["zeroconf"]

2437

2218

2438

2219

if debug:

2439

2220

initlogger(debug, logging.DEBUG)

2446

2227

2447

2228

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

2448

2229

syslogger.setFormatter(logging.Formatter

2449

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

2450

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

2451

.format(server_settings

2452

["servicename"])))

2230

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

2231

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

2232

% server_settings["servicename"]))

2453

2233

2454

2234

# Parse config file with clients

2455

2235

client_config = configparser.SafeConfigParser(Client

2460

2240

global mandos_dbus_service

2461

2241

mandos_dbus_service = None

2462

2242

2463

socketfd = None

2464

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

2465

socketfd = server_settings["socket"]

2466

2243

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

2467

2244

server_settings["port"]),

2468

2245

ClientHandler,

2471

2248

use_ipv6=use_ipv6,

2472

2249

gnutls_priority=

2473

2250

server_settings["priority"],

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

2251

use_dbus=use_dbus)

2252

if not debug:

2253

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

2481

2254

try:

2482

2255

pidfile = open(pidfilename, "w")

2483

except IOError as e:

2484

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

2485

exc_info=e)

2256

except IOError:

2257

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

2486

2258

2487

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

2259

try:

2260

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

2261

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

2262

except KeyError:

2488

2263

try:

2489

uid = pwd.getpwnam(name).pw_uid

2490

gid = pwd.getpwnam(name).pw_gid

2491

break

2264

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

2265

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

2492

2266

except KeyError:

2493

continue

2494

else:

2495

uid = 65534

2496

gid = 65534

2267

try:

2268

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

2269

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

2270

except KeyError:

2271

uid = 65534

2272

gid = 65534

2497

2273

try:

2498

2274

os.setgid(gid)

2499

2275

os.setuid(uid)

2500

2276

except OSError as error:

2501

if error.errno != errno.EPERM:

2502

raise

2277

if error[0] != errno.EPERM:

2278

raise error

2503

2279

2504

2280

if debug:

2505

2281

# Enable all possible GnuTLS debugging

2522

2298

os.close(null)

2523

2299

2524

2300

# Need to fork before connecting to D-Bus

2525

if not foreground:

2301

if not debug:

2526

2302

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

2527

2303

daemon()

2528

2304

2529

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

2530

# need to inform gobject that threads will be used.

2531

2305

gobject.threads_init()

2532

2306

2533

2307

global main_loop

2544

2318

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

2545

2319

do_not_queue=True))

2546

2320

except dbus.exceptions.NameExistsException as e:

2547

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

2321

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

2548

2322

use_dbus = False

2549

2323

server_settings["use_dbus"] = False

2550

2324

tcp_server.use_dbus = False

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")))

2325

protocol = avahi.PROTO_INET6 if use_ipv6 else avahi.PROTO_INET

2326

service = AvahiServiceToSyslog(name =

2327

server_settings["servicename"],

2328

servicetype = "_mandos._tcp",

2329

protocol = protocol, bus = bus)

2330

if server_settings["interface"]:

2331

service.interface = (if_nametoindex

2332

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

2561

2333

2562

2334

global multiprocessing_manager

2563

2335

multiprocessing_manager = multiprocessing.Manager()

2564

2336

2565

2337

client_class = Client

2566

2338

if use_dbus:

2567

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

2339

client_class = functools.partial(ClientDBusTransitional,

2340

bus = bus)

2568

2341

2569

2342

client_settings = Client.config_parser(client_config)

2570

2343

old_client_settings = {}

2571

2344

clients_data = {}

2572

2345

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

2581

2346

# Get client data and settings from last running state.

2582

2347

if server_settings["restore"]:

2583

2348

try:

2586

2351

(stored_state))

2587

2352

os.remove(stored_state_path)

2588

2353

except IOError as e:

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)

2354

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

2355

.format(e))

2356

if e.errno != errno.ENOENT:

2595

2357

raise

2596

2358

except EOFError as e:

2597

2359

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

2598

"EOFError:", exc_info=e)

2360

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

2599

2361

2600

2362

with PGPEngine() as pgp:

2601

for client_name, client in clients_data.items():

2602

# Skip removed clients

2603

if client_name not in client_settings:

2604

continue

2605

2363

for client_name, client in clients_data.iteritems():

2606

2364

# Decide which value to use after restoring saved state.

2607

2365

# We have three different values: Old config file,

2608

2366

# new config file, and saved state.

2629

2387

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

2630

2388

if not client["last_checked_ok"]:

2631

2389

logger.warning(

2632

"disabling client {} - Client never "

2390

"disabling client {0} - Client never "

2633

2391

"performed a successful checker"

2634

2392

.format(client_name))

2635

2393

client["enabled"] = False

2636

2394

elif client["last_checker_status"] != 0:

2637

2395

logger.warning(

2638

"disabling client {} - Client last"

2639

" checker failed with error code {}"

2396

"disabling client {0} - Client "

2397

"last checker failed with error code {1}"

2640

2398

.format(client_name,

2641

2399

client["last_checker_status"]))

2642

2400

client["enabled"] = False

2645

2403

.utcnow()

2646

2404

+ client["timeout"])

2647

2405

logger.debug("Last checker succeeded,"

2648

" keeping {} enabled"

2406

" keeping {0} enabled"

2649

2407

.format(client_name))

2650

2408

try:

2651

2409

client["secret"] = (

2654

2412

["secret"]))

2655

2413

except PGPError:

2656

2414

# If decryption fails, we use secret from new settings

2657

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

2415

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

2658

2416

.format(client_name))

2659

2417

client["secret"] = (

2660

2418

client_settings[client_name]["secret"])

2419

2661

2420

2662

2421

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

2663

2422

for client_name in (set(old_client_settings)

2666

2425

for client_name in (set(client_settings)

2667

2426

- set(old_client_settings)):

2668

2427

clients_data[client_name] = client_settings[client_name]

2669

2428

2670

2429

# Create all client objects

2671

for client_name, client in clients_data.items():

2430

for client_name, client in clients_data.iteritems():

2672

2431

tcp_server.clients[client_name] = client_class(

2673

name = client_name, settings = client,

2674

server_settings = server_settings)

2432

name = client_name, settings = client)

2675

2433

2676

2434

if not tcp_server.clients:

2677

2435

logger.warning("No clients defined")

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

2436

2437

if not debug:

2438

try:

2439

with pidfile:

2440

pid = os.getpid()

2441

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

2442

del pidfile

2443

except IOError:

2444

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

2445

pidfilename, pid)

2446

except NameError:

2447

# "pidfile" was never created

2448

pass

2689

2449

del pidfilename

2450

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

2690

2451

2691

2452

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

2692

2453

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

2693

2454

2694

2455

if use_dbus:

2695

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

2696

"se.bsnet.fukt.Mandos"})

2697

2456

class MandosDBusService(DBusObjectWithProperties):

2698

2457

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

2699

2458

def __init__(self):

2733

2492

def GetAllClientsWithProperties(self):

2734

2493

"D-Bus method"

2735

2494

return dbus.Dictionary(

2736

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

2737

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

2495

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

2496

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

2738

2497

signature="oa{sv}")

2739

2498

2740

2499

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

2753

2512

2754

2513

del _interface

2755

2514

2756

mandos_dbus_service = MandosDBusService()

2515

class MandosDBusServiceTransitional(MandosDBusService):

2516

__metaclass__ = AlternateDBusNamesMetaclass

2517

mandos_dbus_service = MandosDBusServiceTransitional()

2757

2518

2758

2519

def cleanup():

2759

2520

"Cleanup function; run on exit"

2760

if zeroconf:

2761

service.cleanup()

2521

service.cleanup()

2762

2522

2763

2523

multiprocessing.active_children()

2764

wnull.close()

2765

2524

if not (tcp_server.clients or client_settings):

2766

2525

return

2767

2526

2778

2537

2779

2538

# A list of attributes that can not be pickled

2780

2539

# + secret.

2781

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

2782

"checker", "server_settings" }

2540

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

2541

"checker"))

2783

2542

for name, typ in (inspect.getmembers

2784

2543

(dbus.service.Object)):

2785

2544

exclude.add(name)

2794

2553

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

2795

2554

2796

2555

try:

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:

2556

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

2557

prefix="clients-",

2558

dir=os.path.dirname

2559

(stored_state_path))

2560

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

2801

2561

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

2802

tempname=stored_state.name

2803

2562

os.rename(tempname, stored_state_path)

2804

2563

except (IOError, OSError) as e:

2564

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

2565

.format(e))

2805

2566

if not debug:

2806

2567

try:

2807

2568

os.remove(tempname)

2808

2569

except NameError:

2809

2570

pass

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

2571

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

2572

errno.EEXIST)):

2573

raise e

2817

2574

2818

2575

# Delete all clients, and settings from config

2819

2576

while tcp_server.clients:

2843

2600

tcp_server.server_activate()

2844

2601

2845

2602

# Find out what port we got

2846

if zeroconf:

2847

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

2603

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

2848

2604

if use_ipv6:

2849

2605

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

2850

" flowinfo %d, scope_id %d",

2851

*tcp_server.socket.getsockname())

2606

" flowinfo %d, scope_id %d"

2607

% tcp_server.socket.getsockname())

2852

2608

else: # IPv4

2853

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

2854

*tcp_server.socket.getsockname())

2609

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

2610

% tcp_server.socket.getsockname())

2855

2611

2856

2612

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

2857

2613

2858

2614

try:

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

2615

# From the Avahi example code

2616

try:

2617

service.activate()

2618

except dbus.exceptions.DBusException as error:

2619

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

2620

cleanup()

2621

sys.exit(1)

2622

# End of Avahi example code

2868

2623

2869

2624

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

2870

2625

lambda *args, **kwargs: