/mandos/trunk : revision 1293

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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

547

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

561

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):

579

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

911

961

# key_id() and fingerprint() functions

912

962

client["key_id"] = (section.get("key_id", "").upper()

913

963

.replace(" ", ""))

914

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

964

client["fingerprint"] = (section.get("fingerprint",

965

"").upper()

915

966

.replace(" ", ""))

967

if not (client["key_id"] or client["fingerprint"]):

968

log.error("Skipping client %s without key_id or"

969

" fingerprint", client_name)

970

del settings[client_name]

971

continue

916

972

if "secret" in section:

917

973

client["secret"] = codecs.decode(section["secret"]

918

974

.encode("utf-8"),

959

1015

self.last_enabled = None

960

1016

self.expires = None

961

1017

962

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

963

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

964

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

1018

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

1019

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

1020

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

965

1021

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

966

1022

datetime.datetime.utcnow())

967

1023

995

1051

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

996

1052

# Already enabled

997

1053

return

998

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

999

1054

self.enabled = True

1000

1055

self.last_enabled = datetime.datetime.utcnow()

1001

1056

self.init_checker()

1006

1061

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

1007

1062

return False

1008

1063

if not quiet:

1009

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

1064

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

1010

1065

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

1011

1066

GLib.source_remove(self.disable_initiator_tag)

1012

1067

self.disable_initiator_tag = None

1024

1079

def __del__(self):

1025

1080

self.disable()

1026

1081

1027

def init_checker(self):

1028

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

1029

# and every interval from then on.

1082

def init_checker(self, randomize_start=False):

1083

# Schedule a new checker to be started a randomly selected

1084

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

1085

# the startup of checkers over time when the server is

1086

# started.

1030

1087

if self.checker_initiator_tag is not None:

1031

1088

GLib.source_remove(self.checker_initiator_tag)

1089

interval_milliseconds = int(self.interval.total_seconds()

1090

* 1000)

1091

if randomize_start:

1092

delay_milliseconds = random.randrange(

1093

interval_milliseconds + 1)

1094

else:

1095

delay_milliseconds = interval_milliseconds

1032

1096

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

1097

delay_milliseconds, self.start_checker, randomize_start)

1098

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

1099

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

1100

# expire at the soonest one interval after a checker was

1101

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

1102

# time might have to be extended.

1103

now = datetime.datetime.utcnow()

1104

self.expires = now + delay + self.interval

1105

# Schedule a disable() at expire time

1036

1106

if self.disable_initiator_tag is not None:

1037

1107

GLib.source_remove(self.disable_initiator_tag)

1038

1108

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()

1109

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

1110

self.disable)

1042

1111

1043

1112

def checker_callback(self, source, condition, connection,

1044

1113

command):

1046

1115

# Read return code from connection (see call_pipe)

1047

1116

returncode = connection.recv()

1048

1117

connection.close()

1049

self.checker.join()

1118

if self.checker is not None:

1119

self.checker.join()

1050

1120

self.checker_callback_tag = None

1051

1121

self.checker = None

1052

1122

1054

1124

self.last_checker_status = returncode

1055

1125

self.last_checker_signal = None

1056

1126

if self.last_checker_status == 0:

1057

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

1058

vars(self))

1127

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

1059

1128

self.checked_ok()

1060

1129

else:

1061

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

1130

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

1062

1131

else:

1063

1132

self.last_checker_status = -1

1064

1133

self.last_checker_signal = -returncode

1065

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

1066

vars(self))

1134

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

1067

1135

return False

1068

1136

1069

1137

def checked_ok(self):

1088

1156

def need_approval(self):

1089

1157

self.last_approval_request = datetime.datetime.utcnow()

1090

1158

1091

def start_checker(self):

1159

def start_checker(self, start_was_randomized=False):

1092

1160

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

1093

1161

1094

1162

If a checker already exists, leave it running and do

1103

1171

# should be.

1104

1172

1105

1173

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

1106

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

1174

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

1107

1175

self.checker.join()

1108

1176

self.checker = None

1109

1177

# Start a new checker if needed

1110

1178

if self.checker is None:

1111

1179

# Escape attributes for the shell

1112

1180

escaped_attrs = {

1113

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

1181

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

1114

1182

for attr in self.runtime_expansions}

1115

1183

try:

1116

1184

command = self.checker_command % escaped_attrs

1117

1185

except TypeError as error:

1118

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

1119

self.checker_command,

1120

exc_info=error)

1186

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

1187

self.checker_command, exc_info=error)

1121

1188

return True # Try again later

1122

1189

self.current_checker_command = command

1123

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

1124

self.name)

1190

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

1125

1191

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

1126

1192

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

1127

1193

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

1143

1209

kwargs=popen_args)

1144

1210

self.checker.start()

1145

1211

self.checker_callback_tag = GLib.io_add_watch(

1146

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

1212

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

1213

GLib.PRIORITY_DEFAULT, GLib.IO_IN,

1147

1214

self.checker_callback, pipe[0], command)

1215

if start_was_randomized:

1216

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

1217

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

1218

# interval from then on.

1219

now = datetime.datetime.utcnow()

1220

self.checker_initiator_tag = GLib.timeout_add(

1221

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

1222

self.start_checker)

1223

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

1224

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

1225

return False

1148

1226

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

1149

1227

return True

1150

1228

1155

1233

self.checker_callback_tag = None

1156

1234

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

1157

1235

return

1158

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

1236

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

1159

1237

self.checker.terminate()

1160

1238

self.checker = None

1161

1239

1188

1266

func._dbus_name = func.__name__

1189

1267

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

1190

1268

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

1191

func._dbus_get_args_options = {'byte_arrays': byte_arrays}

1269

func._dbus_get_args_options = {"byte_arrays": byte_arrays}

1192

1270

return func

1193

1271

1194

1272

return decorator

1283

1361

1284

1362

@dbus.service.method(dbus.INTROSPECTABLE_IFACE,

1285

1363

out_signature="s",

1286

path_keyword='object_path',

1287

connection_keyword='connection')

1364

path_keyword="object_path",

1365

connection_keyword="connection")

1288

1366

def Introspect(self, object_path, connection):

1289

1367

"""Overloading of standard D-Bus method.

1290

1368

1339

1417

document.unlink()

1340

1418

except (AttributeError, xml.dom.DOMException,

1341

1419

xml.parsers.expat.ExpatError) as error:

1342

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

1343

exc_info=error)

1420

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

1421

exc_info=error)

1344

1422

return xmlstring

1345

1423

1346

1424

1404

1482

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

1405

1483

"'ay' signature {!r}"

1406

1484

.format(prop._dbus_signature))

1407

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

1408

for byte in value))

1485

value = dbus.ByteArray(bytes(value))

1409

1486

prop(value)

1410

1487

1411

1488

@dbus.service.method(dbus.PROPERTIES_IFACE,

1444

1521

1445

1522

@dbus.service.method(dbus.INTROSPECTABLE_IFACE,

1446

1523

out_signature="s",

1447

path_keyword='object_path',

1448

connection_keyword='connection')

1524

path_keyword="object_path",

1525

connection_keyword="connection")

1449

1526

def Introspect(self, object_path, connection):

1450

1527

"""Overloading of standard D-Bus method.

1451

1528

1507

1584

document.unlink()

1508

1585

except (AttributeError, xml.dom.DOMException,

1509

1586

xml.parsers.expat.ExpatError) as error:

1510

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

1511

exc_info=error)

1587

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

1588

exc_info=error)

1512

1589

return xmlstring

1513

1590

1514

1591

1546

1623

1547

1624

@dbus.service.method(dbus.INTROSPECTABLE_IFACE,

1548

1625

out_signature="s",

1549

path_keyword='object_path',

1550

connection_keyword='connection')

1626

path_keyword="object_path",

1627

connection_keyword="connection")

1551

1628

def Introspect(self, object_path, connection):

1552

1629

"""Overloading of standard D-Bus method.

1553

1630

1578

1655

document.unlink()

1579

1656

except (AttributeError, xml.dom.DOMException,

1580

1657

xml.parsers.expat.ExpatError) as error:

1581

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

1582

exc_info=error)

1658

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

1659

exc_info=error)

1583

1660

return xmlstring

1584

1661

1585

1662

2219

2296

class ProxyClient:

2220

2297

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

2221

2298

self._pipe = child_pipe

2222

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

2299

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

2223

2300

if not self._pipe.recv():

2224

2301

raise KeyError(key_id or fpr)

2225

2302

2226

2303

def __getattribute__(self, name):

2227

if name == '_pipe':

2304

if name == "_pipe":

2228

2305

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

2229

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

2306

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

2230

2307

data = self._pipe.recv()

2231

if data[0] == 'data':

2308

if data[0] == "data":

2232

2309

return data[1]

2233

if data[0] == 'function':

2310

if data[0] == "function":

2234

2311

2235

2312

def func(*args, **kwargs):

2236

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

2313

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

2237

2314

return self._pipe.recv()[1]

2238

2315

2239

2316

return func

2240

2317

2241

2318

def __setattr__(self, name, value):

2242

if name == '_pipe':

2319

if name == "_pipe":

2243

2320

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

2244

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

2321

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

2245

2322

2246

2323

2247

2324

class ClientHandler(socketserver.BaseRequestHandler, object):

2252

2329

2253

2330

def handle(self):

2254

2331

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())

2332

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

2333

str(self.client_address))

2334

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

2259

2335

2260

2336

session = gnutls.ClientSession(self.request)

2261

2337

2262

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

2338

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

2263

2339

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

2264

2340

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

2265

2341

# "+DHE-DSS"))

2267

2343

priority = self.server.gnutls_priority

2268

2344

if priority is None:

2269

2345

priority = "NORMAL"

2270

gnutls.priority_set_direct(session._c_object,

2271

priority.encode("utf-8"),

2272

None)

2346

gnutls.priority_set_direct(session,

2347

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

2273

2348

2274

2349

# Start communication using the Mandos protocol

2275

2350

# Get protocol number

2276

2351

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

2277

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

2352

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

2278

2353

try:

2279

2354

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

2280

2355

raise RuntimeError(line)

2281

2356

except (ValueError, IndexError, RuntimeError) as error:

2282

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

2357

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

2283

2358

return

2284

2359

2285

2360

# Start GnuTLS connection

2286

2361

try:

2287

2362

session.handshake()

2288

2363

except gnutls.Error as error:

2289

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

2364

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

2290

2365

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

2291

2366

# established. Just abandon the request.

2292

2367

return

2293

logger.debug("Handshake succeeded")

2368

log.debug("Handshake succeeded")

2294

2369

2295

2370

approval_required = False

2296

2371

try:

2300

2375

key_id = self.key_id(

2301

2376

self.peer_certificate(session))

2302

2377

except (TypeError, gnutls.Error) as error:

2303

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

2378

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

2304

2379

return

2305

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

2380

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

2381

key_id.decode("utf-8",

2382

errors="replace"))

2306

2383

2307

2384

else:

2308

2385

key_id = b""

2310

2387

fpr = self.fingerprint(

2311

2388

self.peer_certificate(session))

2312

2389

except (TypeError, gnutls.Error) as error:

2313

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

2390

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

2314

2391

return

2315

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

2392

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

2316

2393

2317

2394

try:

2318

2395

client = ProxyClient(child_pipe, key_id, fpr,

2327

2404

2328

2405

while True:

2329

2406

if not client.enabled:

2330

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

2331

client.name)

2407

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

2332

2408

if self.server.use_dbus:

2333

2409

# Emit D-Bus signal

2334

2410

client.Rejected("Disabled")

2338

2414

# We are approved or approval is disabled

2339

2415

break

2340

2416

elif client.approved is None:

2341

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

2342

client.name)

2417

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

2418

client.name)

2343

2419

if self.server.use_dbus:

2344

2420

# Emit D-Bus signal

2345

2421

client.NeedApproval(

2346

2422

client.approval_delay.total_seconds()

2347

2423

* 1000, client.approved_by_default)

2348

2424

else:

2349

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

2350

client.name)

2425

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

2426

client.name)

2351

2427

if self.server.use_dbus:

2352

2428

# Emit D-Bus signal

2353

2429

client.Rejected("Denied")

2361

2437

time2 = datetime.datetime.now()

2362

2438

if (time2 - time) >= delay:

2363

2439

if not client.approved_by_default:

2364

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

2365

" waiting for approval",

2366

client.name)

2440

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

2441

" waiting for approval",

2442

client.name)

2367

2443

if self.server.use_dbus:

2368

2444

# Emit D-Bus signal

2369

2445

client.Rejected("Approval timed out")

2376

2452

try:

2377

2453

session.send(client.secret)

2378

2454

except gnutls.Error as error:

2379

logger.warning("gnutls send failed",

2380

exc_info=error)

2455

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

2381

2456

return

2382

2457

2383

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

2458

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

2384

2459

# bump the timeout using extended_timeout

2385

2460

client.bump_timeout(client.extended_timeout)

2386

2461

if self.server.use_dbus:

2393

2468

try:

2394

2469

session.bye()

2395

2470

except gnutls.Error as error:

2396

logger.warning("GnuTLS bye failed",

2397

exc_info=error)

2471

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

2398

2472

2399

2473

@staticmethod

2400

2474

def peer_certificate(session):

2401

2475

"Return the peer's certificate as a bytestring"

2402

2476

try:

2403

cert_type = gnutls.certificate_type_get2(session._c_object,

2404

gnutls.CTYPE_PEERS)

2477

cert_type = gnutls.certificate_type_get2(

2478

session, gnutls.CTYPE_PEERS)

2405

2479

except AttributeError:

2406

cert_type = gnutls.certificate_type_get(session._c_object)

2480

cert_type = gnutls.certificate_type_get(session)

2407

2481

if gnutls.has_rawpk:

2408

2482

valid_cert_types = frozenset((gnutls.CRT_RAWPK,))

2409

2483

else:

2410

2484

valid_cert_types = frozenset((gnutls.CRT_OPENPGP,))

2411

2485

# If not a valid certificate type...

2412

2486

if cert_type not in valid_cert_types:

2413

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

2414

valid_cert_types)

2487

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

2488

valid_cert_types)

2415

2489

# ...return invalid data

2416

2490

return b""

2417

2491

list_size = ctypes.c_uint(1)

2418

2492

cert_list = (gnutls.certificate_get_peers

2419

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

2493

(session, ctypes.byref(list_size)))

2420

2494

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

2421

2495

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

2422

2496

if list_size.value == 0:

2444

2518

buf = ctypes.create_string_buffer(32)

2445

2519

buf_len = ctypes.c_size_t(len(buf))

2446

2520

# 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))

2521

gnutls.pubkey_get_key_id(

2522

pubkey,

2523

gnutls.KEYID_USE_SHA256,

2524

ctypes.cast(ctypes.byref(buf),

2525

ctypes.POINTER(ctypes.c_ubyte)),

2526

ctypes.byref(buf_len))

2452

2527

# Deinit the certificate

2453

2528

gnutls.pubkey_deinit(pubkey)

2454

2529

2535

2610

2536

2611

class IPv6_TCPServer(MultiprocessingMixInWithPipe,

2537

2612

socketserver.TCPServer):

2538

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

2613

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

2539

2614

2540

2615

Attributes:

2541

2616

enabled: Boolean; whether this server is activated yet

2592

2667

if SO_BINDTODEVICE is None:

2593

2668

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

2594

2669

# common enough.

2595

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

2670

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

2596

2671

SO_BINDTODEVICE = 25

2597

2672

try:

2598

2673

self.socket.setsockopt(

2600

2675

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

2601

2676

except socket.error as error:

2602

2677

if error.errno == errno.EPERM:

2603

logger.error("No permission to bind to"

2604

" interface %s", self.interface)

2678

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

2679

self.interface)

2605

2680

elif error.errno == errno.ENOPROTOOPT:

2606

logger.error("SO_BINDTODEVICE not available;"

2607

" cannot bind to interface %s",

2608

self.interface)

2681

log.error("SO_BINDTODEVICE not available; cannot"

2682

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

2609

2683

elif error.errno == errno.ENODEV:

2610

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

2611

" cannot bind", self.interface)

2684

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

2685

" bind", self.interface)

2612

2686

else:

2613

2687

raise

2614

2688

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

2673

2747

def add_pipe(self, parent_pipe, proc):

2674

2748

# Call "handle_ipc" for both data and EOF events

2675

2749

GLib.io_add_watch(

2676

parent_pipe.fileno(),

2677

GLib.IO_IN | GLib.IO_HUP,

2750

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

2751

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

2678

2752

functools.partial(self.handle_ipc,

2679

2753

parent_pipe=parent_pipe,

2680

2754

proc=proc))

2693

2767

request = parent_pipe.recv()

2694

2768

command = request[0]

2695

2769

2696

if command == 'init':

2770

if command == "init":

2697

2771

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

2698

2772

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

2699

2773

address = request[3]

2700

2774

2701

2775

for c in self.clients.values():

2702

if key_id == "E3B0C44298FC1C149AFBF4C8996FB92427AE41E4649B934CA495991B7852B855":

2776

if key_id == ("E3B0C44298FC1C149AFBF4C8996FB924"

2777

"27AE41E4649B934CA495991B7852B855"):

2703

2778

continue

2704

2779

if key_id and c.key_id == key_id:

2705

2780

client = c

2708

2783

client = c

2709

2784

break

2710

2785

else:

2711

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

2712

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

2786

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

2787

" %s", key_id or fpr, address)

2713

2788

if self.use_dbus:

2714

2789

# Emit D-Bus signal

2715

2790

mandos_dbus_service.ClientNotFound(key_id or fpr,

2718

2793

return False

2719

2794

2720

2795

GLib.io_add_watch(

2721

parent_pipe.fileno(),

2722

GLib.IO_IN | GLib.IO_HUP,

2796

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

2797

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

2723

2798

functools.partial(self.handle_ipc,

2724

2799

parent_pipe=parent_pipe,

2725

2800

proc=proc,

2728

2803

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

2729

2804

# same fileno

2730

2805

return False

2731

if command == 'funcall':

2806

if command == "funcall":

2732

2807

funcname = request[1]

2733

2808

args = request[2]

2734

2809

kwargs = request[3]

2735

2810

2736

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

2811

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

2737

2812

funcname)(*args,

2738

2813

**kwargs)))

2739

2814

2740

if command == 'getattr':

2815

if command == "getattr":

2741

2816

attrname = request[1]

2742

2817

if isinstance(client_object.__getattribute__(attrname),

2743

collections.Callable):

2744

parent_pipe.send(('function', ))

2818

collections.abc.Callable):

2819

parent_pipe.send(("function", ))

2745

2820

else:

2746

2821

parent_pipe.send((

2747

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

2822

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

2748

2823

2749

if command == 'setattr':

2824

if command == "setattr":

2750

2825

attrname = request[1]

2751

2826

value = request[2]

2752

2827

setattr(client_object, attrname, value)

2757

2832

def rfc3339_duration_to_delta(duration):

2758

2833

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

2759

2834

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)

2835

>>> timedelta = datetime.timedelta

2836

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

2837

True

2838

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

2839

True

2840

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

2841

True

2842

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

2843

True

2844

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

2845

True

2846

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

2847

True

2848

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

2849

True

2850

>>> del timedelta

2774

2851

"""

2775

2852

2776

2853

# Parsing an RFC 3339 duration with regular expressions is not

2856

2933

def string_to_delta(interval):

2857

2934

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

2858

2935

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)

2936

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

2937

True

2938

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

2939

True

2940

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

2941

True

2942

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

2943

True

2944

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

2945

True

2946

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

2947

True

2871

2948

"""

2872

2949

2873

2950

try:

2975

3052

2976

3053

options = parser.parse_args()

2977

3054

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

3055

# Default values for config file for server-global settings

2984

3056

if gnutls.has_rawpk:

2985

3057

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

3081

3153

3082

3154

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

3083

3155

syslogger.setFormatter(

3084

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

3085

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

3156

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

3157

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

3086

3158

server_settings["servicename"])))

3087

3159

3088

3160

# Parse config file with clients

3112

3184

try:

3113

3185

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

3114

3186

except IOError as e:

3115

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

3116

exc_info=e)

3187

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

3188

exc_info=e)

3117

3189

3118

3190

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

3119

3191

("mandos", "mandos"),

3130

3202

try:

3131

3203

os.setgid(gid)

3132

3204

os.setuid(uid)

3133

if debug:

3134

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

3135

gid))

3205

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

3136

3206

except OSError as error:

3137

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

3138

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

3207

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

3208

os.strerror(error.errno))

3139

3209

if error.errno != errno.EPERM:

3140

3210

raise

3141

3211

3148

3218

3149

3219

@gnutls.log_func

3150

3220

def debug_gnutls(level, string):

3151

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

3221

log.debug("GnuTLS: %s",

3222

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

3152

3223

3153

3224

gnutls.global_set_log_function(debug_gnutls)

3154

3225

3183

3254

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

3184

3255

do_not_queue=True)

3185

3256

except dbus.exceptions.DBusException as e:

3186

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

3257

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

3187

3258

use_dbus = False

3188

3259

server_settings["use_dbus"] = False

3189

3260

tcp_server.use_dbus = False

3248

3319

if isinstance(s, bytes)

3249

3320

else s) for s in

3250

3321

value["client_structure"]]

3251

# .name & .host

3252

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

3322

# .name, .host, and .checker_command

3323

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

3253

3324

if isinstance(value[k], bytes):

3254

3325

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

3255

3326

if "key_id" not in value:

3265

3336

for key, value in

3266

3337

bytes_old_client_settings.items()}

3267

3338

del bytes_old_client_settings

3268

# .host

3339

# .host and .checker_command

3269

3340

for value in old_client_settings.values():

3270

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

3271

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

3272

.decode("utf-8"))

3341

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

3342

if isinstance(value[attribute], bytes):

3343

value[attribute] = (value[attribute]

3344

.decode("utf-8"))

3273

3345

os.remove(stored_state_path)

3274

3346

except IOError as e:

3275

3347

if e.errno == errno.ENOENT:

3276

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

3277

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

3348

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

3349

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

3278

3350

else:

3279

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

3280

exc_info=e)

3351

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

3352

exc_info=e)

3281

3353

raise

3282

3354

except EOFError as e:

3283

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

3284

"EOFError:",

3285

exc_info=e)

3355

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

3356

exc_info=e)

3286

3357

3287

3358

with PGPEngine() as pgp:

3288

3359

for client_name, client in clients_data.items():

3315

3386

if client["enabled"]:

3316

3387

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

3317

3388

if not client["last_checked_ok"]:

3318

logger.warning(

3319

"disabling client {} - Client never "

3320

"performed a successful checker".format(

3321

client_name))

3389

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

3390

" never performed a successful"

3391

" checker", client_name)

3322

3392

client["enabled"] = False

3323

3393

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"]))

3394

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

3395

" last checker failed with error"

3396

" code %s", client_name,

3397

client["last_checker_status"])

3330

3398

client["enabled"] = False

3331

3399

else:

3332

3400

client["expires"] = (

3333

3401

datetime.datetime.utcnow()

3334

3402

+ client["timeout"])

3335

logger.debug("Last checker succeeded,"

3336

" keeping {} enabled".format(

3337

client_name))

3403

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

3404

" enabled", client_name)

3338

3405

try:

3339

3406

client["secret"] = pgp.decrypt(

3340

3407

client["encrypted_secret"],

3341

3408

client_settings[client_name]["secret"])

3342

3409

except PGPError:

3343

3410

# If decryption fails, we use secret from new settings

3344

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

3345

client_name))

3411

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

3412

client_name)

3346

3413

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

3347

3414

["secret"])

3348

3415

3362

3429

server_settings=server_settings)

3363

3430

3364

3431

if not tcp_server.clients:

3365

logger.warning("No clients defined")

3432

log.warning("No clients defined")

3366

3433

3367

3434

if not foreground:

3368

3435

if pidfile is not None:

3371

3438

with pidfile:

3372

3439

print(pid, file=pidfile)

3373

3440

except IOError:

3374

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

3375

pidfilename, pid)

3441

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

3442

pidfilename, pid)

3376

3443

del pidfile

3377

3444

del pidfilename

3378

3445

3528

3595

3529

3596

try:

3530

3597

with tempfile.NamedTemporaryFile(

3531

mode='wb',

3598

mode="wb",

3532

3599

suffix=".pickle",

3533

prefix='clients-',

3600

prefix="clients-",

3534

3601

dir=os.path.dirname(stored_state_path),

3535

3602

delete=False) as stored_state:

3536

3603

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

3544

3611

except NameError:

3545

3612

pass

3546

3613

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

3547

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

3548

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

3614

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

3615

os.strerror(e.errno))

3549

3616

else:

3550

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

3551

exc_info=e)

3617

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

3618

exc_info=e)

3552

3619

raise

3553

3620

3554

3621

# Delete all clients, and settings from config

3571

3638

mandos_dbus_service.client_added_signal(client)

3572

3639

# Need to initiate checking of clients

3573

3640

if client.enabled:

3574

client.init_checker()

3641

client.init_checker(randomize_start=True)

3575

3642

3576

3643

tcp_server.enable()

3577

3644

tcp_server.server_activate()

3580

3647

if zeroconf:

3581

3648

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

3582

3649

if use_ipv6:

3583

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

3584

" flowinfo %d, scope_id %d",

3585

*tcp_server.socket.getsockname())

3650

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

3651

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

3586

3652

else: # IPv4

3587

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

3588

*tcp_server.socket.getsockname())

3653

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

3654

*tcp_server.socket.getsockname())

3589

3655

3590

3656

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

3591

3657

3595

3661

try:

3596

3662

service.activate()

3597

3663

except dbus.exceptions.DBusException as error:

3598

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

3664

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

3599

3665

cleanup()

3600

3666

sys.exit(1)

3601

3667

# End of Avahi example code

3602

3668

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))

3669

GLib.io_add_watch(

3670

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

3671

GLib.PRIORITY_DEFAULT, GLib.IO_IN,

3672

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

3673

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

3607

3674

3608

logger.debug("Starting main loop")

3675

log.debug("Starting main loop")

3609

3676

main_loop.run()

3610

3677

except AvahiError as error:

3611

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

3678

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

3612

3679

cleanup()

3613

3680

sys.exit(1)

3614

3681

except KeyboardInterrupt:

3615

3682

if debug:

3616

3683

print("", file=sys.stderr)

3617

logger.debug("Server received KeyboardInterrupt")

3618

logger.debug("Server exiting")

3684

log.debug("Server received KeyboardInterrupt")

3685

log.debug("Server exiting")

3619

3686

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

3620

3687

cleanup()

3621

3688

3622

3623

if __name__ == '__main__':

3624

main()

3689

3690

def parse_test_args():

3691

# type: () -> argparse.Namespace

3692

parser = argparse.ArgumentParser(add_help=False)

3693

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

3694

parser.add_argument("--prefix", )

3695

args, unknown_args = parser.parse_known_args()

3696

if args.check:

3697

# Remove test options from sys.argv

3698

sys.argv[1:] = unknown_args

3699

return args

3700

3701

# Add all tests from doctest strings

3702

def load_tests(loader, tests, none):

3703

import doctest

3704

tests.addTests(doctest.DocTestSuite())

3705

return tests

3706

3707

if __name__ == "__main__":

3708

options = parse_test_args()

3709

try:

3710

if options.check:

3711

extra_test_prefix = options.prefix

3712

if extra_test_prefix is not None:

3713

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

3714

.result.wasSuccessful()):

3715

sys.exit(1)

3716

class ExtraTestLoader(unittest.TestLoader):

3717

testMethodPrefix = extra_test_prefix

3718

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

3719

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

3720

else:

3721

unittest.main(argv=[""])

3722

else:

3723

main()

3724

finally:

3725

logging.shutdown()

3726

3727

# Local Variables:

3728

# run-tests:

3729

# (lambda (&optional extra)

3730

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

3731

# extra))

3732

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

3733

# (funcall remove-test-window)

3734

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

3735

# run-tests-in-test-buffer:

3736

# (lambda (dir &optional extra)

3737

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

3738

# (setq buffer-read-only nil

3739

# default-directory dir)

3740

# (erase-buffer)

3741

# (compilation-mode))

3742

# (let ((process-result

3743

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

3744

# (process-file-shell-command

3745

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

3746

# (and (numberp process-result)

3747

# (= process-result 0))))

3748

# get-command-line:

3749

# (lambda (&optional extra)

3750

# (let ((quoted-script

3751

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

3752

# (format

3753

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

3754

# quoted-script)))

3755

# get-script-name:

3756

# (lambda ()

3757

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

3758

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

3759

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

3760

# (buffer-file-name))))

3761

# remove-test-window:

3762

# (lambda ()

3763

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

3764

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

3765

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

3766

# (lambda ()

3767

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

3768

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

3769

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

3770

# (display-buffer-overriding-action

3771

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

3772

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

3773

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

3774

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

3775

# eval:

3776

# (progn

3777

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

3778

# (funcall run-tests t)))

3779

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

3780

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

3781

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

3782

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

3783

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

3784

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

3785

# End: