/mandos/trunk : revision 1274

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#!/usr/bin/python

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

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#!/usr/bin/python3 -bI

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# -*- coding: utf-8; lexical-binding: t -*-

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#

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

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#

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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 file is part of Mandos.

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#

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#

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

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#

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from __future__ import (division, absolute_import, print_function,

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unicode_literals)

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except ImportError:

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pass

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import sys

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import unittest

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import argparse

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import logging

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import os

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try:

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import SocketServer as socketserver

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except ImportError:

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import socketserver

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import socket

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import argparse

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import datetime

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import errno

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try:

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import ConfigParser as configparser

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except ImportError:

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import configparser

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import sys

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import re

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import os

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import signal

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import subprocess

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import atexit

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import stat

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import logging

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import logging.handlers

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import pwd

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import contextlib

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import itertools

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import collections

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import codecs

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import random

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import shlex

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import dbus

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import dbus.service

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if sys.version_info.major == 2:

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__metaclass__ = type

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str = unicode

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input = raw_input

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# Add collections.abc.Callable if it does not exist

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try:

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collections.abc.Callable

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except AttributeError:

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class abc:

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Callable = collections.Callable

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collections.abc = abc

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del abc

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# Add shlex.quote if it does not exist

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try:

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shlex.quote

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except AttributeError:

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shlex.quote = re.escape

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# Show warnings by default

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if not sys.warnoptions:

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import warnings

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warnings.simplefilter("default")

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# Try to find the value of SO_BINDTODEVICE:

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try:

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# No value found

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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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if sys.version_info < (3, 2):

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configparser.Configparser = configparser.SafeConfigParser

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version = "1.8.7"

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version = "1.8.16"

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stored_state_file = "clients.pickle"

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logger = logging.getLogger()

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log = logging.getLogger(os.path.basename(sys.argv[0]))

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logging.captureWarnings(True) # Show warnings via the logging system

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syslogger = None

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try:

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facility=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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logger.addHandler(syslogger)

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

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" %(message)s"))

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log.addHandler(syslogger)

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if debug:

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console = logging.StreamHandler()

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

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' [%(process)d]:'

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' %(levelname)s:'

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' %(message)s'))

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logger.addHandler(console)

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logger.setLevel(level)

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

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" [%(process)d]:"

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" %(levelname)s:"

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" %(message)s"))

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log.addHandler(console)

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log.setLevel(level)

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class PGPError(Exception):

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output = subprocess.check_output(["gpgconf"])

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for line in output.splitlines():

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name, text, path = line.split(b":")

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if name == "gpg":

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if name == b"gpg":

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self.gpg = path

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break

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except OSError as e:

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if e.errno != errno.ENOENT:

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raise

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self.gnupgargs = ['--batch',

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'--homedir', self.tempdir,

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'--force-mdc',

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'--quiet']

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self.gnupgargs = ["--batch",

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"--homedir", self.tempdir,

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"--force-mdc",

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"--quiet"]

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# Only GPG version 1 has the --no-use-agent option.

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if self.gpg == "gpg" or self.gpg.endswith("/gpg"):

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if self.gpg == b"gpg" or self.gpg.endswith(b"/gpg"):

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self.gnupgargs.append("--no-use-agent")

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def __enter__(self):

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dir=self.tempdir) as passfile:

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passfile.write(passphrase)

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passfile.flush()

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

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'--passphrase-file',

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proc = subprocess.Popen([self.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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dir=self.tempdir) as passfile:

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passfile.write(passphrase)

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passfile.flush()

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

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'--passphrase-file',

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proc = subprocess.Popen([self.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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Attributes:

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interface: integer; avahi.IF_UNSPEC or an interface index.

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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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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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port: integer; what port to announce

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TXT: list of strings; TXT record for the service

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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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log.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(

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self.server.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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log.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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try:

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

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self.cleanup()

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os._exit(1)

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avahi.DBUS_INTERFACE_ENTRY_GROUP)

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self.entry_group_state_changed_match = (

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self.group.connect_to_signal(

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'StateChanged', self.entry_group_state_changed))

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

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self.name, self.type)

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"StateChanged", self.entry_group_state_changed))

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

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self.name, self.type)

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self.group.AddService(

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self.interface,

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self.protocol,

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

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if state == avahi.ENTRY_GROUP_ESTABLISHED:

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logger.debug("Zeroconf service established.")

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log.debug("Zeroconf service established.")

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elif state == avahi.ENTRY_GROUP_COLLISION:

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

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log.info("Zeroconf service name collision.")

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

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str(error))

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raise AvahiGroupError("State changed: {!s}".format(error))

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def cleanup(self):

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

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bad_states = {

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avahi.SERVER_INVALID: "Zeroconf server invalid",

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avahi.SERVER_REGISTERING: None,

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if state in bad_states:

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if bad_states[state] is not None:

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if error is None:

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logger.error(bad_states[state])

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log.error(bad_states[state])

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else:

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

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

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self.cleanup()

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elif state == avahi.SERVER_RUNNING:

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try:

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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"

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" collision.")

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

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self.cleanup()

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os._exit(1)

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else:

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if error is None:

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

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log.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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log.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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class AvahiServiceToSyslog(AvahiService):

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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 = super(AvahiServiceToSyslog, self).rename(*args, **kwargs)

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ret = super(AvahiServiceToSyslog, self).rename(*args,

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**kwargs)

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syslogger.setFormatter(logging.Formatter(

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

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"Mandos ({}) [%(process)d]: %(levelname)s: %(message)s"

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.format(self.name)))

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return ret

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OPENPGP_FMT_RAW = 0 # gnutls/openpgp.h

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# Types

543

class session_int(ctypes.Structure):

565

class _session_int(ctypes.Structure):

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566

_fields_ = []

545

session_t = ctypes.POINTER(session_int)

567

session_t = ctypes.POINTER(_session_int)

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568

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569

class certificate_credentials_st(ctypes.Structure):

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_fields_ = []

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573

certificate_type_t = ctypes.c_int

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574

553

575

class datum_t(ctypes.Structure):

554

_fields_ = [('data', ctypes.POINTER(ctypes.c_ubyte)),

555

('size', ctypes.c_uint)]

576

_fields_ = [("data", ctypes.POINTER(ctypes.c_ubyte)),

577

("size", ctypes.c_uint)]

556

578

557

class openpgp_crt_int(ctypes.Structure):

579

class _openpgp_crt_int(ctypes.Structure):

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580

_fields_ = []

559

openpgp_crt_t = ctypes.POINTER(openpgp_crt_int)

581

openpgp_crt_t = ctypes.POINTER(_openpgp_crt_int)

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582

openpgp_crt_fmt_t = ctypes.c_int # gnutls/openpgp.h

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583

log_func = ctypes.CFUNCTYPE(None, ctypes.c_int, ctypes.c_char_p)

562

584

credentials_type_t = ctypes.c_int

571

593

# gnutls.strerror()

572

594

self.code = code

573

595

if message is None and code is not None:

574

message = gnutls.strerror(code)

596

message = gnutls.strerror(code).decode(

597

"utf-8", errors="replace")

575

598

return super(gnutls.Error, self).__init__(

576

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message, *args)

577

600

578

601

class CertificateSecurityError(Error):

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602

pass

580

603

604

class PointerTo:

605

def __init__(self, cls):

606

self.cls = cls

607

608

def from_param(self, obj):

609

if not isinstance(obj, self.cls):

610

raise TypeError("Not of type {}: {!r}"

611

.format(self.cls.__name__, obj))

612

return ctypes.byref(obj.from_param(obj))

613

614

class CastToVoidPointer:

615

def __init__(self, cls):

616

self.cls = cls

617

618

def from_param(self, obj):

619

if not isinstance(obj, self.cls):

620

raise TypeError("Not of type {}: {!r}"

621

.format(self.cls.__name__, obj))

622

return ctypes.cast(obj.from_param(obj), ctypes.c_void_p)

623

624

class With_from_param:

625

@classmethod

626

def from_param(cls, obj):

627

return obj._as_parameter_

628

581

629

# Classes

582

class Credentials:

630

class Credentials(With_from_param):

583

631

def __init__(self):

584

self._c_object = gnutls.certificate_credentials_t()

585

gnutls.certificate_allocate_credentials(

586

ctypes.byref(self._c_object))

632

self._as_parameter_ = gnutls.certificate_credentials_t()

633

gnutls.certificate_allocate_credentials(self)

587

634

self.type = gnutls.CRD_CERTIFICATE

588

635

589

636

def __del__(self):

590

gnutls.certificate_free_credentials(self._c_object)

637

gnutls.certificate_free_credentials(self)

591

638

592

class ClientSession:

639

class ClientSession(With_from_param):

593

640

def __init__(self, socket, credentials=None):

594

self._c_object = gnutls.session_t()

641

self._as_parameter_ = gnutls.session_t()

595

642

gnutls_flags = gnutls.CLIENT

596

643

if gnutls.check_version(b"3.5.6"):

597

644

gnutls_flags |= gnutls.NO_TICKETS

598

645

if gnutls.has_rawpk:

599

646

gnutls_flags |= gnutls.ENABLE_RAWPK

600

gnutls.init(ctypes.byref(self._c_object), gnutls_flags)

647

gnutls.init(self, gnutls_flags)

601

648

del gnutls_flags

602

gnutls.set_default_priority(self._c_object)

603

gnutls.transport_set_ptr(self._c_object, socket.fileno())

604

gnutls.handshake_set_private_extensions(self._c_object,

605

True)

649

gnutls.set_default_priority(self)

650

gnutls.transport_set_ptr(self, socket.fileno())

651

gnutls.handshake_set_private_extensions(self, True)

606

652

self.socket = socket

607

653

if credentials is None:

608

654

credentials = gnutls.Credentials()

609

gnutls.credentials_set(self._c_object, credentials.type,

610

ctypes.cast(credentials._c_object,

611

ctypes.c_void_p))

655

gnutls.credentials_set(self, credentials.type,

656

credentials)

612

657

self.credentials = credentials

613

658

614

659

def __del__(self):

615

gnutls.deinit(self._c_object)

660

gnutls.deinit(self)

616

661

617

662

def handshake(self):

618

return gnutls.handshake(self._c_object)

663

return gnutls.handshake(self)

619

664

620

665

def send(self, data):

621

666

data = bytes(data)

622

667

data_len = len(data)

623

668

while data_len > 0:

624

data_len -= gnutls.record_send(self._c_object,

625

data[-data_len:],

669

data_len -= gnutls.record_send(self, data[-data_len:],

626

670

data_len)

627

671

628

672

def bye(self):

629

return gnutls.bye(self._c_object, gnutls.SHUT_RDWR)

673

return gnutls.bye(self, gnutls.SHUT_RDWR)

630

674

631

675

# Error handling functions

632

676

def _error_code(result):

633

677

"""A function to raise exceptions on errors, suitable

634

for the 'restype' attribute on ctypes functions"""

635

if result >= 0:

678

for the "restype" attribute on ctypes functions"""

679

if result >= gnutls.E_SUCCESS:

636

680

return result

637

681

if result == gnutls.E_NO_CERTIFICATE_FOUND:

638

682

raise gnutls.CertificateSecurityError(code=result)

639

683

raise gnutls.Error(code=result)

640

684

641

def _retry_on_error(result, func, arguments):

685

def _retry_on_error(result, func, arguments,

686

_error_code=_error_code):

642

687

"""A function to retry on some errors, suitable

643

for the 'errcheck' attribute on ctypes functions"""

644

while result < 0:

688

for the "errcheck" attribute on ctypes functions"""

689

while result < gnutls.E_SUCCESS:

645

690

if result not in (gnutls.E_INTERRUPTED, gnutls.E_AGAIN):

646

691

return _error_code(result)

647

692

result = func(*arguments)

652

697

653

698

# Functions

654

699

priority_set_direct = _library.gnutls_priority_set_direct

655

priority_set_direct.argtypes = [session_t, ctypes.c_char_p,

700

priority_set_direct.argtypes = [ClientSession, ctypes.c_char_p,

656

701

ctypes.POINTER(ctypes.c_char_p)]

657

702

priority_set_direct.restype = _error_code

658

703

659

704

init = _library.gnutls_init

660

init.argtypes = [ctypes.POINTER(session_t), ctypes.c_int]

705

init.argtypes = [PointerTo(ClientSession), ctypes.c_int]

661

706

init.restype = _error_code

662

707

663

708

set_default_priority = _library.gnutls_set_default_priority

664

set_default_priority.argtypes = [session_t]

709

set_default_priority.argtypes = [ClientSession]

665

710

set_default_priority.restype = _error_code

666

711

667

712

record_send = _library.gnutls_record_send

668

record_send.argtypes = [session_t, ctypes.c_void_p,

713

record_send.argtypes = [ClientSession, ctypes.c_void_p,

669

714

ctypes.c_size_t]

670

715

record_send.restype = ctypes.c_ssize_t

671

716

record_send.errcheck = _retry_on_error

673

718

certificate_allocate_credentials = (

674

719

_library.gnutls_certificate_allocate_credentials)

675

720

certificate_allocate_credentials.argtypes = [

676

ctypes.POINTER(certificate_credentials_t)]

721

PointerTo(Credentials)]

677

722

certificate_allocate_credentials.restype = _error_code

678

723

679

724

certificate_free_credentials = (

680

725

_library.gnutls_certificate_free_credentials)

681

certificate_free_credentials.argtypes = [

682

certificate_credentials_t]

726

certificate_free_credentials.argtypes = [Credentials]

683

727

certificate_free_credentials.restype = None

684

728

685

729

handshake_set_private_extensions = (

686

730

_library.gnutls_handshake_set_private_extensions)

687

handshake_set_private_extensions.argtypes = [session_t,

731

handshake_set_private_extensions.argtypes = [ClientSession,

688

732

ctypes.c_int]

689

733

handshake_set_private_extensions.restype = None

690

734

691

735

credentials_set = _library.gnutls_credentials_set

692

credentials_set.argtypes = [session_t, credentials_type_t,

693

ctypes.c_void_p]

736

credentials_set.argtypes = [ClientSession, credentials_type_t,

737

CastToVoidPointer(Credentials)]

694

738

credentials_set.restype = _error_code

695

739

696

740

strerror = _library.gnutls_strerror

698

742

strerror.restype = ctypes.c_char_p

699

743

700

744

certificate_type_get = _library.gnutls_certificate_type_get

701

certificate_type_get.argtypes = [session_t]

745

certificate_type_get.argtypes = [ClientSession]

702

746

certificate_type_get.restype = _error_code

703

747

704

748

certificate_get_peers = _library.gnutls_certificate_get_peers

705

certificate_get_peers.argtypes = [session_t,

749

certificate_get_peers.argtypes = [ClientSession,

706

750

ctypes.POINTER(ctypes.c_uint)]

707

751

certificate_get_peers.restype = ctypes.POINTER(datum_t)

708

752

715

759

global_set_log_function.restype = None

716

760

717

761

deinit = _library.gnutls_deinit

718

deinit.argtypes = [session_t]

762

deinit.argtypes = [ClientSession]

719

763

deinit.restype = None

720

764

721

765

handshake = _library.gnutls_handshake

722

handshake.argtypes = [session_t]

723

handshake.restype = _error_code

766

handshake.argtypes = [ClientSession]

767

handshake.restype = ctypes.c_int

724

768

handshake.errcheck = _retry_on_error

725

769

726

770

transport_set_ptr = _library.gnutls_transport_set_ptr

727

transport_set_ptr.argtypes = [session_t, transport_ptr_t]

771

transport_set_ptr.argtypes = [ClientSession, transport_ptr_t]

728

772

transport_set_ptr.restype = None

729

773

730

774

bye = _library.gnutls_bye

731

bye.argtypes = [session_t, close_request_t]

732

bye.restype = _error_code

775

bye.argtypes = [ClientSession, close_request_t]

776

bye.restype = ctypes.c_int

733

777

bye.errcheck = _retry_on_error

734

778

735

779

check_version = _library.gnutls_check_version

752

796

753

797

x509_crt_fmt_t = ctypes.c_int

754

798

755

# All the function declarations below are from gnutls/abstract.h

799

# All the function declarations below are from

800

# gnutls/abstract.h

756

801

pubkey_init = _library.gnutls_pubkey_init

757

802

pubkey_init.argtypes = [ctypes.POINTER(pubkey_t)]

758

803

pubkey_init.restype = _error_code

772

817

pubkey_deinit.argtypes = [pubkey_t]

773

818

pubkey_deinit.restype = None

774

819

else:

775

# All the function declarations below are from gnutls/openpgp.h

820

# All the function declarations below are from

821

# gnutls/openpgp.h

776

822

777

823

openpgp_crt_init = _library.gnutls_openpgp_crt_init

778

824

openpgp_crt_init.argtypes = [ctypes.POINTER(openpgp_crt_t)]

784

830

openpgp_crt_fmt_t]

785

831

openpgp_crt_import.restype = _error_code

786

832

787

openpgp_crt_verify_self = _library.gnutls_openpgp_crt_verify_self

788

openpgp_crt_verify_self.argtypes = [openpgp_crt_t, ctypes.c_uint,

789

ctypes.POINTER(ctypes.c_uint)]

833

openpgp_crt_verify_self = \

834

_library.gnutls_openpgp_crt_verify_self

835

openpgp_crt_verify_self.argtypes = [

836

openpgp_crt_t,

837

ctypes.c_uint,

838

ctypes.POINTER(ctypes.c_uint),

839

]

790

840

openpgp_crt_verify_self.restype = _error_code

791

841

792

842

openpgp_crt_deinit = _library.gnutls_openpgp_crt_deinit

803

853

804

854

if check_version(b"3.6.4"):

805

855

certificate_type_get2 = _library.gnutls_certificate_type_get2

806

certificate_type_get2.argtypes = [session_t, ctypes.c_int]

856

certificate_type_get2.argtypes = [ClientSession, ctypes.c_int]

807

857

certificate_type_get2.restype = _error_code

808

858

809

859

# Remove non-public functions

825

875

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

826

876

827

877

Attributes:

828

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

878

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

829

879

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

830

880

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

831

881

checker: multiprocessing.Process(); a running checker process used

832

to see if the client lives. 'None' if no process is

882

to see if the client lives. None if no process is

833

883

running.

834

884

checker_callback_tag: a GLib event source tag, or None

835

885

checker_command: string; External command which is run to check

959

1009

self.last_enabled = None

960

1010

self.expires = None

961

1011

962

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

963

logger.debug(" Key ID: %s", self.key_id)

964

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

1012

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

1013

log.debug(" Key ID: %s", self.key_id)

1014

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

965

1015

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

966

1016

datetime.datetime.utcnow())

967

1017

995

1045

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

996

1046

# Already enabled

997

1047

return

998

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

999

1048

self.enabled = True

1000

1049

self.last_enabled = datetime.datetime.utcnow()

1001

1050

self.init_checker()

1006

1055

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

1007

1056

return False

1008

1057

if not quiet:

1009

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

1058

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

1010

1059

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

1011

1060

GLib.source_remove(self.disable_initiator_tag)

1012

1061

self.disable_initiator_tag = None

1024

1073

def __del__(self):

1025

1074

self.disable()

1026

1075

1027

def init_checker(self):

1028

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

1029

# and every interval from then on.

1076

def init_checker(self, randomize_start=False):

1077

# Schedule a new checker to be started a randomly selected

1078

# time (a fraction of 'interval') from now. This spreads out

1079

# the startup of checkers over time when the server is

1080

# started.

1030

1081

if self.checker_initiator_tag is not None:

1031

1082

GLib.source_remove(self.checker_initiator_tag)

1083

interval_milliseconds = int(self.interval.total_seconds()

1084

* 1000)

1085

if randomize_start:

1086

delay_milliseconds = random.randrange(

1087

interval_milliseconds + 1)

1088

else:

1089

delay_milliseconds = interval_milliseconds

1032

1090

self.checker_initiator_tag = GLib.timeout_add(

1033

int(self.interval.total_seconds() * 1000),

1034

self.start_checker)

1035

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

1091

delay_milliseconds, self.start_checker, randomize_start)

1092

delay = datetime.timedelta(0, 0, 0, delay_milliseconds)

1093

# A checker might take up to an 'interval' of time, so we can

1094

# expire at the soonest one interval after a checker was

1095

# started. Since the initial checker is delayed, the expire

1096

# time might have to be extended.

1097

now = datetime.datetime.utcnow()

1098

self.expires = now + delay + self.interval

1099

# Schedule a disable() at expire time

1036

1100

if self.disable_initiator_tag is not None:

1037

1101

GLib.source_remove(self.disable_initiator_tag)

1038

1102

self.disable_initiator_tag = GLib.timeout_add(

1039

int(self.timeout.total_seconds() * 1000), self.disable)

1040

# Also start a new checker *right now*.

1041

self.start_checker()

1103

int((self.expires - now).total_seconds() * 1000),

1104

self.disable)

1042

1105

1043

1106

def checker_callback(self, source, condition, connection,

1044

1107

command):

1046

1109

# Read return code from connection (see call_pipe)

1047

1110

returncode = connection.recv()

1048

1111

connection.close()

1049

self.checker.join()

1112

if self.checker is not None:

1113

self.checker.join()

1050

1114

self.checker_callback_tag = None

1051

1115

self.checker = None

1052

1116

1054

1118

self.last_checker_status = returncode

1055

1119

self.last_checker_signal = None

1056

1120

if self.last_checker_status == 0:

1057

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

1058

vars(self))

1121

log.info("Checker for %(name)s succeeded", vars(self))

1059

1122

self.checked_ok()

1060

1123

else:

1061

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

1124

log.info("Checker for %(name)s failed", vars(self))

1062

1125

else:

1063

1126

self.last_checker_status = -1

1064

1127

self.last_checker_signal = -returncode

1065

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

1066

vars(self))

1128

log.warning("Checker for %(name)s crashed?", vars(self))

1067

1129

return False

1068

1130

1069

1131

def checked_ok(self):

1088

1150

def need_approval(self):

1089

1151

self.last_approval_request = datetime.datetime.utcnow()

1090

1152

1091

def start_checker(self):

1153

def start_checker(self, start_was_randomized=False):

1092

1154

"""Start a new checker subprocess if one is not running.

1093

1155

1094

1156

If a checker already exists, leave it running and do

1103

1165

# should be.

1104

1166

1105

1167

if self.checker is not None and not self.checker.is_alive():

1106

logger.warning("Checker was not alive; joining")

1168

log.warning("Checker was not alive; joining")

1107

1169

self.checker.join()

1108

1170

self.checker = None

1109

1171

# Start a new checker if needed

1110

1172

if self.checker is None:

1111

1173

# Escape attributes for the shell

1112

1174

escaped_attrs = {

1113

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

1175

attr: shlex.quote(str(getattr(self, attr)))

1114

1176

for attr in self.runtime_expansions}

1115

1177

try:

1116

1178

command = self.checker_command % escaped_attrs

1117

1179

except TypeError as error:

1118

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

1119

self.checker_command,

1120

exc_info=error)

1180

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

1181

self.checker_command, exc_info=error)

1121

1182

return True # Try again later

1122

1183

self.current_checker_command = command

1123

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

1124

self.name)

1184

log.info("Starting checker %r for %s", command, self.name)

1125

1185

# We don't need to redirect stdout and stderr, since

1126

1186

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

1127

1187

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

1143

1203

kwargs=popen_args)

1144

1204

self.checker.start()

1145

1205

self.checker_callback_tag = GLib.io_add_watch(

1146

pipe[0].fileno(), GLib.IO_IN,

1206

GLib.IOChannel.unix_new(pipe[0].fileno()),

1207

GLib.PRIORITY_DEFAULT, GLib.IO_IN,

1147

1208

self.checker_callback, pipe[0], command)

1209

if start_was_randomized:

1210

# We were started after a random delay; Schedule a new

1211

# checker to be started an 'interval' from now, and every

1212

# interval from then on.

1213

now = datetime.datetime.utcnow()

1214

self.checker_initiator_tag = GLib.timeout_add(

1215

int(self.interval.total_seconds() * 1000),

1216

self.start_checker)

1217

self.expires = max(self.expires, now + self.interval)

1218

# Don't start a new checker again after same random delay

1219

return False

1148

1220

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

1149

1221

return True

1150

1222

1155

1227

self.checker_callback_tag = None

1156

1228

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

1157

1229

return

1158

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

1230

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

1159

1231

self.checker.terminate()

1160

1232

self.checker = None

1161

1233

1188

1260

func._dbus_name = func.__name__

1189

1261

if func._dbus_name.endswith("_dbus_property"):

1190

1262

func._dbus_name = func._dbus_name[:-14]

1191

func._dbus_get_args_options = {'byte_arrays': byte_arrays}

1263

func._dbus_get_args_options = {"byte_arrays": byte_arrays}

1192

1264

return func

1193

1265

1194

1266

return decorator

1283

1355

1284

1356

@dbus.service.method(dbus.INTROSPECTABLE_IFACE,

1285

1357

out_signature="s",

1286

path_keyword='object_path',

1287

connection_keyword='connection')

1358

path_keyword="object_path",

1359

connection_keyword="connection")

1288

1360

def Introspect(self, object_path, connection):

1289

1361

"""Overloading of standard D-Bus method.

1290

1362

1339

1411

document.unlink()

1340

1412

except (AttributeError, xml.dom.DOMException,

1341

1413

xml.parsers.expat.ExpatError) as error:

1342

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

1343

exc_info=error)

1414

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

1415

exc_info=error)

1344

1416

return xmlstring

1345

1417

1346

1418

1404

1476

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

1405

1477

"'ay' signature {!r}"

1406

1478

.format(prop._dbus_signature))

1407

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

1408

for byte in value))

1479

value = dbus.ByteArray(bytes(value))

1409

1480

prop(value)

1410

1481

1411

1482

@dbus.service.method(dbus.PROPERTIES_IFACE,

1444

1515

1445

1516

@dbus.service.method(dbus.INTROSPECTABLE_IFACE,

1446

1517

out_signature="s",

1447

path_keyword='object_path',

1448

connection_keyword='connection')

1518

path_keyword="object_path",

1519

connection_keyword="connection")

1449

1520

def Introspect(self, object_path, connection):

1450

1521

"""Overloading of standard D-Bus method.

1451

1522

1507

1578

document.unlink()

1508

1579

except (AttributeError, xml.dom.DOMException,

1509

1580

xml.parsers.expat.ExpatError) as error:

1510

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

1511

exc_info=error)

1581

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

1582

exc_info=error)

1512

1583

return xmlstring

1513

1584

1514

1585

1546

1617

1547

1618

@dbus.service.method(dbus.INTROSPECTABLE_IFACE,

1548

1619

out_signature="s",

1549

path_keyword='object_path',

1550

connection_keyword='connection')

1620

path_keyword="object_path",

1621

connection_keyword="connection")

1551

1622

def Introspect(self, object_path, connection):

1552

1623

"""Overloading of standard D-Bus method.

1553

1624

1578

1649

document.unlink()

1579

1650

except (AttributeError, xml.dom.DOMException,

1580

1651

xml.parsers.expat.ExpatError) as error:

1581

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

1582

exc_info=error)

1652

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

1653

exc_info=error)

1583

1654

return xmlstring

1584

1655

1585

1656

2219

2290

class ProxyClient:

2220

2291

def __init__(self, child_pipe, key_id, fpr, address):

2221

2292

self._pipe = child_pipe

2222

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

2293

self._pipe.send(("init", key_id, fpr, address))

2223

2294

if not self._pipe.recv():

2224

2295

raise KeyError(key_id or fpr)

2225

2296

2226

2297

def __getattribute__(self, name):

2227

if name == '_pipe':

2298

if name == "_pipe":

2228

2299

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

2229

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

2300

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

2230

2301

data = self._pipe.recv()

2231

if data[0] == 'data':

2302

if data[0] == "data":

2232

2303

return data[1]

2233

if data[0] == 'function':

2304

if data[0] == "function":

2234

2305

2235

2306

def func(*args, **kwargs):

2236

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

2307

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

2237

2308

return self._pipe.recv()[1]

2238

2309

2239

2310

return func

2240

2311

2241

2312

def __setattr__(self, name, value):

2242

if name == '_pipe':

2313

if name == "_pipe":

2243

2314

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

2244

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

2315

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

2245

2316

2246

2317

2247

2318

class ClientHandler(socketserver.BaseRequestHandler, object):

2252

2323

2253

2324

def handle(self):

2254

2325

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

2255

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

2256

str(self.client_address))

2257

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

2258

self.server.child_pipe.fileno())

2326

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

2327

str(self.client_address))

2328

log.debug("Pipe FD: %d", self.server.child_pipe.fileno())

2259

2329

2260

2330

session = gnutls.ClientSession(self.request)

2261

2331

2262

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

2332

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

2263

2333

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

2264

2334

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

2265

2335

# "+DHE-DSS"))

2267

2337

priority = self.server.gnutls_priority

2268

2338

if priority is None:

2269

2339

priority = "NORMAL"

2270

gnutls.priority_set_direct(session._c_object,

2271

priority.encode("utf-8"),

2272

None)

2340

gnutls.priority_set_direct(session,

2341

priority.encode("utf-8"), None)

2273

2342

2274

2343

# Start communication using the Mandos protocol

2275

2344

# Get protocol number

2276

2345

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

2277

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

2346

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

2278

2347

try:

2279

2348

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

2280

2349

raise RuntimeError(line)

2281

2350

except (ValueError, IndexError, RuntimeError) as error:

2282

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

2351

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

2283

2352

return

2284

2353

2285

2354

# Start GnuTLS connection

2286

2355

try:

2287

2356

session.handshake()

2288

2357

except gnutls.Error as error:

2289

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

2358

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

2290

2359

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

2291

2360

# established. Just abandon the request.

2292

2361

return

2293

logger.debug("Handshake succeeded")

2362

log.debug("Handshake succeeded")

2294

2363

2295

2364

approval_required = False

2296

2365

try:

2300

2369

key_id = self.key_id(

2301

2370

self.peer_certificate(session))

2302

2371

except (TypeError, gnutls.Error) as error:

2303

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

2372

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

2304

2373

return

2305

logger.debug("Key ID: %s", key_id)

2374

log.debug("Key ID: %s",

2375

key_id.decode("utf-8",

2376

errors="replace"))

2306

2377

2307

2378

else:

2308

2379

key_id = b""

2310

2381

fpr = self.fingerprint(

2311

2382

self.peer_certificate(session))

2312

2383

except (TypeError, gnutls.Error) as error:

2313

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

2384

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

2314

2385

return

2315

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

2386

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

2316

2387

2317

2388

try:

2318

2389

client = ProxyClient(child_pipe, key_id, fpr,

2327

2398

2328

2399

while True:

2329

2400

if not client.enabled:

2330

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

2331

client.name)

2401

log.info("Client %s is disabled", client.name)

2332

2402

if self.server.use_dbus:

2333

2403

# Emit D-Bus signal

2334

2404

client.Rejected("Disabled")

2338

2408

# We are approved or approval is disabled

2339

2409

break

2340

2410

elif client.approved is None:

2341

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

2342

client.name)

2411

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

2412

client.name)

2343

2413

if self.server.use_dbus:

2344

2414

# Emit D-Bus signal

2345

2415

client.NeedApproval(

2346

2416

client.approval_delay.total_seconds()

2347

2417

* 1000, client.approved_by_default)

2348

2418

else:

2349

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

2350

client.name)

2419

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

2420

client.name)

2351

2421

if self.server.use_dbus:

2352

2422

# Emit D-Bus signal

2353

2423

client.Rejected("Denied")

2361

2431

time2 = datetime.datetime.now()

2362

2432

if (time2 - time) >= delay:

2363

2433

if not client.approved_by_default:

2364

logger.warning("Client %s timed out while"

2365

" waiting for approval",

2366

client.name)

2434

log.warning("Client %s timed out while"

2435

" waiting for approval",

2436

client.name)

2367

2437

if self.server.use_dbus:

2368

2438

# Emit D-Bus signal

2369

2439

client.Rejected("Approval timed out")

2376

2446

try:

2377

2447

session.send(client.secret)

2378

2448

except gnutls.Error as error:

2379

logger.warning("gnutls send failed",

2380

exc_info=error)

2449

log.warning("gnutls send failed", exc_info=error)

2381

2450

return

2382

2451

2383

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

2452

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

2384

2453

# bump the timeout using extended_timeout

2385

2454

client.bump_timeout(client.extended_timeout)

2386

2455

if self.server.use_dbus:

2393

2462

try:

2394

2463

session.bye()

2395

2464

except gnutls.Error as error:

2396

logger.warning("GnuTLS bye failed",

2397

exc_info=error)

2465

log.warning("GnuTLS bye failed", exc_info=error)

2398

2466

2399

2467

@staticmethod

2400

2468

def peer_certificate(session):

2401

2469

"Return the peer's certificate as a bytestring"

2402

2470

try:

2403

cert_type = gnutls.certificate_type_get2(session._c_object,

2404

gnutls.CTYPE_PEERS)

2471

cert_type = gnutls.certificate_type_get2(

2472

session, gnutls.CTYPE_PEERS)

2405

2473

except AttributeError:

2406

cert_type = gnutls.certificate_type_get(session._c_object)

2474

cert_type = gnutls.certificate_type_get(session)

2407

2475

if gnutls.has_rawpk:

2408

2476

valid_cert_types = frozenset((gnutls.CRT_RAWPK,))

2409

2477

else:

2410

2478

valid_cert_types = frozenset((gnutls.CRT_OPENPGP,))

2411

2479

# If not a valid certificate type...

2412

2480

if cert_type not in valid_cert_types:

2413

logger.info("Cert type %r not in %r", cert_type,

2414

valid_cert_types)

2481

log.info("Cert type %r not in %r", cert_type,

2482

valid_cert_types)

2415

2483

# ...return invalid data

2416

2484

return b""

2417

2485

list_size = ctypes.c_uint(1)

2418

2486

cert_list = (gnutls.certificate_get_peers

2419

(session._c_object, ctypes.byref(list_size)))

2487

(session, ctypes.byref(list_size)))

2420

2488

if not bool(cert_list) and list_size.value != 0:

2421

2489

raise gnutls.Error("error getting peer certificate")

2422

2490

if list_size.value == 0:

2444

2512

buf = ctypes.create_string_buffer(32)

2445

2513

buf_len = ctypes.c_size_t(len(buf))

2446

2514

# Get the key ID from the raw public key into the buffer

2447

gnutls.pubkey_get_key_id(pubkey,

2448

gnutls.KEYID_USE_SHA256,

2449

ctypes.cast(ctypes.byref(buf),

2450

ctypes.POINTER(ctypes.c_ubyte)),

2451

ctypes.byref(buf_len))

2515

gnutls.pubkey_get_key_id(

2516

pubkey,

2517

gnutls.KEYID_USE_SHA256,

2518

ctypes.cast(ctypes.byref(buf),

2519

ctypes.POINTER(ctypes.c_ubyte)),

2520

ctypes.byref(buf_len))

2452

2521

# Deinit the certificate

2453

2522

gnutls.pubkey_deinit(pubkey)

2454

2523

2535

2604

2536

2605

class IPv6_TCPServer(MultiprocessingMixInWithPipe,

2537

2606

socketserver.TCPServer):

2538

"""IPv6-capable TCP server. Accepts 'None' as address and/or port

2607

"""IPv6-capable TCP server. Accepts None as address and/or port

2539

2608

2540

2609

Attributes:

2541

2610

enabled: Boolean; whether this server is activated yet

2592

2661

if SO_BINDTODEVICE is None:

2593

2662

# Fall back to a hard-coded value which seems to be

2594

2663

# common enough.

2595

logger.warning("SO_BINDTODEVICE not found, trying 25")

2664

log.warning("SO_BINDTODEVICE not found, trying 25")

2596

2665

SO_BINDTODEVICE = 25

2597

2666

try:

2598

2667

self.socket.setsockopt(

2600

2669

(self.interface + "\0").encode("utf-8"))

2601

2670

except socket.error as error:

2602

2671

if error.errno == errno.EPERM:

2603

logger.error("No permission to bind to"

2604

" interface %s", self.interface)

2672

log.error("No permission to bind to interface %s",

2673

self.interface)

2605

2674

elif error.errno == errno.ENOPROTOOPT:

2606

logger.error("SO_BINDTODEVICE not available;"

2607

" cannot bind to interface %s",

2608

self.interface)

2675

log.error("SO_BINDTODEVICE not available; cannot"

2676

" bind to interface %s", self.interface)

2609

2677

elif error.errno == errno.ENODEV:

2610

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

2611

" cannot bind", self.interface)

2678

log.error("Interface %s does not exist, cannot"

2679

" bind", self.interface)

2612

2680

else:

2613

2681

raise

2614

2682

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

2673

2741

def add_pipe(self, parent_pipe, proc):

2674

2742

# Call "handle_ipc" for both data and EOF events

2675

2743

GLib.io_add_watch(

2676

parent_pipe.fileno(),

2677

GLib.IO_IN | GLib.IO_HUP,

2744

GLib.IOChannel.unix_new(parent_pipe.fileno()),

2745

GLib.PRIORITY_DEFAULT, GLib.IO_IN | GLib.IO_HUP,

2678

2746

functools.partial(self.handle_ipc,

2679

2747

parent_pipe=parent_pipe,

2680

2748

proc=proc))

2693

2761

request = parent_pipe.recv()

2694

2762

command = request[0]

2695

2763

2696

if command == 'init':

2764

if command == "init":

2697

2765

key_id = request[1].decode("ascii")

2698

2766

fpr = request[2].decode("ascii")

2699

2767

address = request[3]

2700

2768

2701

2769

for c in self.clients.values():

2702

if key_id == "E3B0C44298FC1C149AFBF4C8996FB92427AE41E4649B934CA495991B7852B855":

2770

if key_id == ("E3B0C44298FC1C149AFBF4C8996FB924"

2771

"27AE41E4649B934CA495991B7852B855"):

2703

2772

continue

2704

2773

if key_id and c.key_id == key_id:

2705

2774

client = c

2708

2777

client = c

2709

2778

break

2710

2779

else:

2711

logger.info("Client not found for key ID: %s, address"

2712

": %s", key_id or fpr, address)

2780

log.info("Client not found for key ID: %s, address:"

2781

" %s", key_id or fpr, address)

2713

2782

if self.use_dbus:

2714

2783

# Emit D-Bus signal

2715

2784

mandos_dbus_service.ClientNotFound(key_id or fpr,

2718

2787

return False

2719

2788

2720

2789

GLib.io_add_watch(

2721

parent_pipe.fileno(),

2722

GLib.IO_IN | GLib.IO_HUP,

2790

GLib.IOChannel.unix_new(parent_pipe.fileno()),

2791

GLib.PRIORITY_DEFAULT, GLib.IO_IN | GLib.IO_HUP,

2723

2792

functools.partial(self.handle_ipc,

2724

2793

parent_pipe=parent_pipe,

2725

2794

proc=proc,

2728

2797

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

2729

2798

# same fileno

2730

2799

return False

2731

if command == 'funcall':

2800

if command == "funcall":

2732

2801

funcname = request[1]

2733

2802

args = request[2]

2734

2803

kwargs = request[3]

2735

2804

2736

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

2805

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

2737

2806

funcname)(*args,

2738

2807

**kwargs)))

2739

2808

2740

if command == 'getattr':

2809

if command == "getattr":

2741

2810

attrname = request[1]

2742

2811

if isinstance(client_object.__getattribute__(attrname),

2743

collections.Callable):

2744

parent_pipe.send(('function', ))

2812

collections.abc.Callable):

2813

parent_pipe.send(("function", ))

2745

2814

else:

2746

2815

parent_pipe.send((

2747

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

2816

"data", client_object.__getattribute__(attrname)))

2748

2817

2749

if command == 'setattr':

2818

if command == "setattr":

2750

2819

attrname = request[1]

2751

2820

value = request[2]

2752

2821

setattr(client_object, attrname, value)

2757

2826

def rfc3339_duration_to_delta(duration):

2758

2827

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

2759

2828

2760

>>> rfc3339_duration_to_delta("P7D")

2761

datetime.timedelta(7)

2762

>>> rfc3339_duration_to_delta("PT60S")

2763

datetime.timedelta(0, 60)

2764

>>> rfc3339_duration_to_delta("PT60M")

2765

datetime.timedelta(0, 3600)

2766

>>> rfc3339_duration_to_delta("PT24H")

2767

datetime.timedelta(1)

2768

>>> rfc3339_duration_to_delta("P1W")

2769

datetime.timedelta(7)

2770

>>> rfc3339_duration_to_delta("PT5M30S")

2771

datetime.timedelta(0, 330)

2772

>>> rfc3339_duration_to_delta("P1DT3M20S")

2773

datetime.timedelta(1, 200)

2829

>>> timedelta = datetime.timedelta

2830

>>> rfc3339_duration_to_delta("P7D") == timedelta(7)

2831

True

2832

>>> rfc3339_duration_to_delta("PT60S") == timedelta(0, 60)

2833

True

2834

>>> rfc3339_duration_to_delta("PT60M") == timedelta(0, 3600)

2835

True

2836

>>> rfc3339_duration_to_delta("PT24H") == timedelta(1)

2837

True

2838

>>> rfc3339_duration_to_delta("P1W") == timedelta(7)

2839

True

2840

>>> rfc3339_duration_to_delta("PT5M30S") == timedelta(0, 330)

2841

True

2842

>>> rfc3339_duration_to_delta("P1DT3M20S") == timedelta(1, 200)

2843

True

2844

>>> del timedelta

2774

2845

"""

2775

2846

2776

2847

# Parsing an RFC 3339 duration with regular expressions is not

2856

2927

def string_to_delta(interval):

2857

2928

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

2858

2929

2859

>>> string_to_delta('7d')

2860

datetime.timedelta(7)

2861

>>> string_to_delta('60s')

2862

datetime.timedelta(0, 60)

2863

>>> string_to_delta('60m')

2864

datetime.timedelta(0, 3600)

2865

>>> string_to_delta('24h')

2866

datetime.timedelta(1)

2867

>>> string_to_delta('1w')

2868

datetime.timedelta(7)

2869

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

2870

datetime.timedelta(0, 330)

2930

>>> string_to_delta("7d") == datetime.timedelta(7)

2931

True

2932

>>> string_to_delta("60s") == datetime.timedelta(0, 60)

2933

True

2934

>>> string_to_delta("60m") == datetime.timedelta(0, 3600)

2935

True

2936

>>> string_to_delta("24h") == datetime.timedelta(1)

2937

True

2938

>>> string_to_delta("1w") == datetime.timedelta(7)

2939

True

2940

>>> string_to_delta("5m 30s") == datetime.timedelta(0, 330)

2941

True

2871

2942

"""

2872

2943

2873

2944

try:

2975

3046

2976

3047

options = parser.parse_args()

2977

3048

2978

if options.check:

2979

import doctest

2980

fail_count, test_count = doctest.testmod()

2981

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

2982

2983

3049

# Default values for config file for server-global settings

2984

3050

if gnutls.has_rawpk:

2985

3051

priority = ("SECURE128:!CTYPE-X.509:+CTYPE-RAWPK:!RSA"

3081

3147

3082

3148

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

3083

3149

syslogger.setFormatter(

3084

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

3085

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

3150

logging.Formatter("Mandos ({}) [%(process)d]:"

3151

" %(levelname)s: %(message)s".format(

3086

3152

server_settings["servicename"])))

3087

3153

3088

3154

# Parse config file with clients

3112

3178

try:

3113

3179

pidfile = codecs.open(pidfilename, "w", encoding="utf-8")

3114

3180

except IOError as e:

3115

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

3116

exc_info=e)

3181

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

3182

exc_info=e)

3117

3183

3118

3184

for name, group in (("_mandos", "_mandos"),

3119

3185

("mandos", "mandos"),

3130

3196

try:

3131

3197

os.setgid(gid)

3132

3198

os.setuid(uid)

3133

if debug:

3134

logger.debug("Did setuid/setgid to {}:{}".format(uid,

3135

gid))

3199

log.debug("Did setuid/setgid to %s:%s", uid, gid)

3136

3200

except OSError as error:

3137

logger.warning("Failed to setuid/setgid to {}:{}: {}"

3138

.format(uid, gid, os.strerror(error.errno)))

3201

log.warning("Failed to setuid/setgid to %s:%s: %s", uid, gid,

3202

os.strerror(error.errno))

3139

3203

if error.errno != errno.EPERM:

3140

3204

raise

3141

3205

3148

3212

3149

3213

@gnutls.log_func

3150

3214

def debug_gnutls(level, string):

3151

logger.debug("GnuTLS: %s", string[:-1])

3215

log.debug("GnuTLS: %s",

3216

string[:-1].decode("utf-8", errors="replace"))

3152

3217

3153

3218

gnutls.global_set_log_function(debug_gnutls)

3154

3219

3183

3248

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

3184

3249

do_not_queue=True)

3185

3250

except dbus.exceptions.DBusException as e:

3186

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

3251

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

3187

3252

use_dbus = False

3188

3253

server_settings["use_dbus"] = False

3189

3254

tcp_server.use_dbus = False

3248

3313

if isinstance(s, bytes)

3249

3314

else s) for s in

3250

3315

value["client_structure"]]

3251

# .name & .host

3252

for k in ("name", "host"):

3316

# .name, .host, and .checker_command

3317

for k in ("name", "host", "checker_command"):

3253

3318

if isinstance(value[k], bytes):

3254

3319

value[k] = value[k].decode("utf-8")

3255

3320

if "key_id" not in value:

3265

3330

for key, value in

3266

3331

bytes_old_client_settings.items()}

3267

3332

del bytes_old_client_settings

3268

# .host

3333

# .host and .checker_command

3269

3334

for value in old_client_settings.values():

3270

if isinstance(value["host"], bytes):

3271

value["host"] = (value["host"]

3272

.decode("utf-8"))

3335

for attribute in ("host", "checker_command"):

3336

if isinstance(value[attribute], bytes):

3337

value[attribute] = (value[attribute]

3338

.decode("utf-8"))

3273

3339

os.remove(stored_state_path)

3274

3340

except IOError as e:

3275

3341

if e.errno == errno.ENOENT:

3276

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

3277

" {}".format(os.strerror(e.errno)))

3342

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

3343

" %s", os.strerror(e.errno))

3278

3344

else:

3279

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

3280

exc_info=e)

3345

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

3346

exc_info=e)

3281

3347

raise

3282

3348

except EOFError as e:

3283

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

3284

"EOFError:",

3285

exc_info=e)

3349

log.warning("Could not load persistent state: EOFError:",

3350

exc_info=e)

3286

3351

3287

3352

with PGPEngine() as pgp:

3288

3353

for client_name, client in clients_data.items():

3315

3380

if client["enabled"]:

3316

3381

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

3317

3382

if not client["last_checked_ok"]:

3318

logger.warning(

3319

"disabling client {} - Client never "

3320

"performed a successful checker".format(

3321

client_name))

3383

log.warning("disabling client %s - Client"

3384

" never performed a successful"

3385

" checker", client_name)

3322

3386

client["enabled"] = False

3323

3387

elif client["last_checker_status"] != 0:

3324

logger.warning(

3325

"disabling client {} - Client last"

3326

" checker failed with error code"

3327

" {}".format(

3328

client_name,

3329

client["last_checker_status"]))

3388

log.warning("disabling client %s - Client"

3389

" last checker failed with error"

3390

" code %s", client_name,

3391

client["last_checker_status"])

3330

3392

client["enabled"] = False

3331

3393

else:

3332

3394

client["expires"] = (

3333

3395

datetime.datetime.utcnow()

3334

3396

+ client["timeout"])

3335

logger.debug("Last checker succeeded,"

3336

" keeping {} enabled".format(

3337

client_name))

3397

log.debug("Last checker succeeded, keeping %s"

3398

" enabled", client_name)

3338

3399

try:

3339

3400

client["secret"] = pgp.decrypt(

3340

3401

client["encrypted_secret"],

3341

3402

client_settings[client_name]["secret"])

3342

3403

except PGPError:

3343

3404

# If decryption fails, we use secret from new settings

3344

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

3345

client_name))

3405

log.debug("Failed to decrypt %s old secret",

3406

client_name)

3346

3407

client["secret"] = (client_settings[client_name]

3347

3408

["secret"])

3348

3409

3362

3423

server_settings=server_settings)

3363

3424

3364

3425

if not tcp_server.clients:

3365

logger.warning("No clients defined")

3426

log.warning("No clients defined")

3366

3427

3367

3428

if not foreground:

3368

3429

if pidfile is not None:

3371

3432

with pidfile:

3372

3433

print(pid, file=pidfile)

3373

3434

except IOError:

3374

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

3375

pidfilename, pid)

3435

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

3436

pidfilename, pid)

3376

3437

del pidfile

3377

3438

del pidfilename

3378

3439

3528

3589

3529

3590

try:

3530

3591

with tempfile.NamedTemporaryFile(

3531

mode='wb',

3592

mode="wb",

3532

3593

suffix=".pickle",

3533

prefix='clients-',

3594

prefix="clients-",

3534

3595

dir=os.path.dirname(stored_state_path),

3535

3596

delete=False) as stored_state:

3536

3597

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

3544

3605

except NameError:

3545

3606

pass

3546

3607

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

3547

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

3548

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

3608

log.warning("Could not save persistent state: %s",

3609

os.strerror(e.errno))

3549

3610

else:

3550

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

3551

exc_info=e)

3611

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

3612

exc_info=e)

3552

3613

raise

3553

3614

3554

3615

# Delete all clients, and settings from config

3571

3632

mandos_dbus_service.client_added_signal(client)

3572

3633

# Need to initiate checking of clients

3573

3634

if client.enabled:

3574

client.init_checker()

3635

client.init_checker(randomize_start=True)

3575

3636

3576

3637

tcp_server.enable()

3577

3638

tcp_server.server_activate()

3580

3641

if zeroconf:

3581

3642

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

3582

3643

if use_ipv6:

3583

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

3584

" flowinfo %d, scope_id %d",

3585

*tcp_server.socket.getsockname())

3644

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

3645

" scope_id %d", *tcp_server.socket.getsockname())

3586

3646

else: # IPv4

3587

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

3588

*tcp_server.socket.getsockname())

3647

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

3648

*tcp_server.socket.getsockname())

3589

3649

3590

3650

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

3591

3651

3595

3655

try:

3596

3656

service.activate()

3597

3657

except dbus.exceptions.DBusException as error:

3598

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

3658

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

3599

3659

cleanup()

3600

3660

sys.exit(1)

3601

3661

# End of Avahi example code

3602

3662

3603

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

3604

lambda *args, **kwargs:

3605

(tcp_server.handle_request

3606

(*args[2:], **kwargs) or True))

3663

GLib.io_add_watch(

3664

GLib.IOChannel.unix_new(tcp_server.fileno()),

3665

GLib.PRIORITY_DEFAULT, GLib.IO_IN,

3666

lambda *args, **kwargs: (tcp_server.handle_request

3667

(*args[2:], **kwargs) or True))

3607

3668

3608

logger.debug("Starting main loop")

3669

log.debug("Starting main loop")

3609

3670

main_loop.run()

3610

3671

except AvahiError as error:

3611

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

3672

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

3612

3673

cleanup()

3613

3674

sys.exit(1)

3614

3675

except KeyboardInterrupt:

3615

3676

if debug:

3616

3677

print("", file=sys.stderr)

3617

logger.debug("Server received KeyboardInterrupt")

3618

logger.debug("Server exiting")

3678

log.debug("Server received KeyboardInterrupt")

3679

log.debug("Server exiting")

3619

3680

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

3620

3681

cleanup()

3621

3682

3622

3623

if __name__ == '__main__':

3624

main()

3683

3684

def parse_test_args():

3685

# type: () -> argparse.Namespace

3686

parser = argparse.ArgumentParser(add_help=False)

3687

parser.add_argument("--check", action="store_true")

3688

parser.add_argument("--prefix", )

3689

args, unknown_args = parser.parse_known_args()

3690

if args.check:

3691

# Remove test options from sys.argv

3692

sys.argv[1:] = unknown_args

3693

return args

3694

3695

# Add all tests from doctest strings

3696

def load_tests(loader, tests, none):

3697

import doctest

3698

tests.addTests(doctest.DocTestSuite())

3699

return tests

3700

3701

if __name__ == "__main__":

3702

options = parse_test_args()

3703

try:

3704

if options.check:

3705

extra_test_prefix = options.prefix

3706

if extra_test_prefix is not None:

3707

if not (unittest.main(argv=[""], exit=False)

3708

.result.wasSuccessful()):

3709

sys.exit(1)

3710

class ExtraTestLoader(unittest.TestLoader):

3711

testMethodPrefix = extra_test_prefix

3712

# Call using ./scriptname --test [--verbose]

3713

unittest.main(argv=[""], testLoader=ExtraTestLoader())

3714

else:

3715

unittest.main(argv=[""])

3716

else:

3717

main()

3718

finally:

3719

logging.shutdown()

3720

3721

# Local Variables:

3722

# run-tests:

3723

# (lambda (&optional extra)

3724

# (if (not (funcall run-tests-in-test-buffer default-directory

3725

# extra))

3726

# (funcall show-test-buffer-in-test-window)

3727

# (funcall remove-test-window)

3728

# (if extra (message "Extra tests run successfully!"))))

3729

# run-tests-in-test-buffer:

3730

# (lambda (dir &optional extra)

3731

# (with-current-buffer (get-buffer-create "*Test*")

3732

# (setq buffer-read-only nil

3733

# default-directory dir)

3734

# (erase-buffer)

3735

# (compilation-mode))

3736

# (let ((process-result

3737

# (let ((inhibit-read-only t))

3738

# (process-file-shell-command

3739

# (funcall get-command-line extra) nil "*Test*"))))

3740

# (and (numberp process-result)

3741

# (= process-result 0))))

3742

# get-command-line:

3743

# (lambda (&optional extra)

3744

# (let ((quoted-script

3745

# (shell-quote-argument (funcall get-script-name))))

3746

# (format

3747

# (concat "%s --check" (if extra " --prefix=atest" ""))

3748

# quoted-script)))

3749

# get-script-name:

3750

# (lambda ()

3751

# (if (fboundp 'file-local-name)

3752

# (file-local-name (buffer-file-name))

3753

# (or (file-remote-p (buffer-file-name) 'localname)

3754

# (buffer-file-name))))

3755

# remove-test-window:

3756

# (lambda ()

3757

# (let ((test-window (get-buffer-window "*Test*")))

3758

# (if test-window (delete-window test-window))))

3759

# show-test-buffer-in-test-window:

3760

# (lambda ()

3761

# (when (not (get-buffer-window-list "*Test*"))

3762

# (setq next-error-last-buffer (get-buffer "*Test*"))

3763

# (let* ((side (if (>= (window-width) 146) 'right 'bottom))

3764

# (display-buffer-overriding-action

3765

# `((display-buffer-in-side-window) (side . ,side)

3766

# (window-height . fit-window-to-buffer)

3767

# (window-width . fit-window-to-buffer))))

3768

# (display-buffer "*Test*"))))

3769

# eval:

3770

# (progn

3771

# (let* ((run-extra-tests (lambda () (interactive)

3772

# (funcall run-tests t)))

3773

# (inner-keymap `(keymap (116 . ,run-extra-tests))) ; t

3774

# (outer-keymap `(keymap (3 . ,inner-keymap)))) ; C-c

3775

# (setq minor-mode-overriding-map-alist

3776

# (cons `(run-tests . ,outer-keymap)

3777

# minor-mode-overriding-map-alist)))

3778

# (add-hook 'after-save-hook run-tests 90 t))

3779

# End: