/mandos/release : revision 237.7.709

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#!/usr/bin/python3 -bI

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

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#!/usr/bin/python

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

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#

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

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#

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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 = "1.8.16"

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version = "1.8.7"

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stored_state_file = "clients.pickle"

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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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logger = logging.getLogger()

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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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log.addHandler(syslogger)

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

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' %(message)s'))

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logger.addHandler(syslogger)

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if debug:

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console = logging.StreamHandler()

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

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" [%(process)d]:"

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" %(levelname)s:"

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" %(message)s"))

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log.addHandler(console)

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log.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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logger.addHandler(console)

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logger.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 == b"gpg":

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

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if self.gpg == "gpg" or self.gpg.endswith("/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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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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logger.critical("No suitable Zeroconf service name found"

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" after %i retries, exiting.",

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self.rename_count)

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raise AvahiServiceError("Too many renames")

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self.name = str(

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self.server.GetAlternativeServiceName(self.name))

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self.rename_count += 1

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

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self.name)

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

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self.name)

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if remove:

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self.remove()

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

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

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return self.rename(remove=False)

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else:

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

394

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

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self.cleanup()

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os._exit(1)

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avahi.DBUS_INTERFACE_ENTRY_GROUP)

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self.entry_group_state_changed_match = (

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self.group.connect_to_signal(

438

"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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'StateChanged', self.entry_group_state_changed))

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

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self.name, self.type)

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self.group.AddService(

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self.interface,

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self.protocol,

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428

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def entry_group_state_changed(self, state, error):

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

453

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

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

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455

433

if state == avahi.ENTRY_GROUP_ESTABLISHED:

456

log.debug("Zeroconf service established.")

434

logger.debug("Zeroconf service established.")

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elif state == avahi.ENTRY_GROUP_COLLISION:

458

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

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

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self.rename()

460

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elif state == avahi.ENTRY_GROUP_FAILURE:

461

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

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str(error))

439

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

440

str(error))

463

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

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def cleanup(self):

475

453

476

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def server_state_changed(self, state, error=None):

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

478

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

456

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

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457

bad_states = {

480

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avahi.SERVER_INVALID: "Zeroconf server invalid",

481

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avahi.SERVER_REGISTERING: None,

485

463

if state in bad_states:

486

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if bad_states[state] is not None:

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if error is None:

488

log.error(bad_states[state])

466

logger.error(bad_states[state])

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467

else:

490

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

468

logger.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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475

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

498

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

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logger.info("Local Zeroconf service name"

477

" collision.")

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return self.rename(remove=False)

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else:

501

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

480

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

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self.cleanup()

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os._exit(1)

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else:

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if error is None:

506

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

485

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

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486

else:

508

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

487

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

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def activate(self):

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

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class AvahiServiceToSyslog(AvahiService):

524

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

525

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

526

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

527

**kwargs)

505

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

528

506

syslogger.setFormatter(logging.Formatter(

529

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

507

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

530

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.format(self.name)))

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return ret

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510

562

540

OPENPGP_FMT_RAW = 0 # gnutls/openpgp.h

563

541

564

542

# Types

565

class _session_int(ctypes.Structure):

543

class session_int(ctypes.Structure):

566

544

_fields_ = []

567

session_t = ctypes.POINTER(_session_int)

545

session_t = ctypes.POINTER(session_int)

568

546

569

547

class certificate_credentials_st(ctypes.Structure):

570

548

_fields_ = []

573

551

certificate_type_t = ctypes.c_int

574

552

575

553

class datum_t(ctypes.Structure):

576

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

577

("size", ctypes.c_uint)]

554

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

555

('size', ctypes.c_uint)]

578

556

579

class _openpgp_crt_int(ctypes.Structure):

557

class openpgp_crt_int(ctypes.Structure):

580

558

_fields_ = []

581

openpgp_crt_t = ctypes.POINTER(_openpgp_crt_int)

559

openpgp_crt_t = ctypes.POINTER(openpgp_crt_int)

582

560

openpgp_crt_fmt_t = ctypes.c_int # gnutls/openpgp.h

583

561

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

584

562

credentials_type_t = ctypes.c_int

593

571

# gnutls.strerror()

594

572

self.code = code

595

573

if message is None and code is not None:

596

message = gnutls.strerror(code).decode(

597

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

574

message = gnutls.strerror(code)

598

575

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

599

576

message, *args)

600

577

601

578

class CertificateSecurityError(Error):

602

579

pass

603

580

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

629

581

# Classes

630

class Credentials(With_from_param):

582

class Credentials:

631

583

def __init__(self):

632

self._as_parameter_ = gnutls.certificate_credentials_t()

633

gnutls.certificate_allocate_credentials(self)

584

self._c_object = gnutls.certificate_credentials_t()

585

gnutls.certificate_allocate_credentials(

586

ctypes.byref(self._c_object))

634

587

self.type = gnutls.CRD_CERTIFICATE

635

588

636

589

def __del__(self):

637

gnutls.certificate_free_credentials(self)

590

gnutls.certificate_free_credentials(self._c_object)

638

591

639

class ClientSession(With_from_param):

592

class ClientSession:

640

593

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

641

self._as_parameter_ = gnutls.session_t()

594

self._c_object = gnutls.session_t()

642

595

gnutls_flags = gnutls.CLIENT

643

596

if gnutls.check_version(b"3.5.6"):

644

597

gnutls_flags |= gnutls.NO_TICKETS

645

598

if gnutls.has_rawpk:

646

599

gnutls_flags |= gnutls.ENABLE_RAWPK

647

gnutls.init(self, gnutls_flags)

600

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

648

601

del gnutls_flags

649

gnutls.set_default_priority(self)

650

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

651

gnutls.handshake_set_private_extensions(self, True)

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)

652

606

self.socket = socket

653

607

if credentials is None:

654

608

credentials = gnutls.Credentials()

655

gnutls.credentials_set(self, credentials.type,

656

credentials)

609

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

610

ctypes.cast(credentials._c_object,

611

ctypes.c_void_p))

657

612

self.credentials = credentials

658

613

659

614

def __del__(self):

660

gnutls.deinit(self)

615

gnutls.deinit(self._c_object)

661

616

662

617

def handshake(self):

663

return gnutls.handshake(self)

618

return gnutls.handshake(self._c_object)

664

619

665

620

def send(self, data):

666

621

data = bytes(data)

667

622

data_len = len(data)

668

623

while data_len > 0:

669

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

624

data_len -= gnutls.record_send(self._c_object,

625

data[-data_len:],

670

626

data_len)

671

627

672

628

def bye(self):

673

return gnutls.bye(self, gnutls.SHUT_RDWR)

629

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

674

630

675

631

# Error handling functions

676

632

def _error_code(result):

677

633

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

678

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

679

if result >= gnutls.E_SUCCESS:

634

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

635

if result >= 0:

680

636

return result

681

637

if result == gnutls.E_NO_CERTIFICATE_FOUND:

682

638

raise gnutls.CertificateSecurityError(code=result)

683

639

raise gnutls.Error(code=result)

684

640

685

def _retry_on_error(result, func, arguments,

686

_error_code=_error_code):

641

def _retry_on_error(result, func, arguments):

687

642

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

688

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

689

while result < gnutls.E_SUCCESS:

643

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

644

while result < 0:

690

645

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

691

646

return _error_code(result)

692

647

result = func(*arguments)

697

652

698

653

# Functions

699

654

priority_set_direct = _library.gnutls_priority_set_direct

700

priority_set_direct.argtypes = [ClientSession, ctypes.c_char_p,

655

priority_set_direct.argtypes = [session_t, ctypes.c_char_p,

701

656

ctypes.POINTER(ctypes.c_char_p)]

702

657

priority_set_direct.restype = _error_code

703

658

704

659

init = _library.gnutls_init

705

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

660

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

706

661

init.restype = _error_code

707

662

708

663

set_default_priority = _library.gnutls_set_default_priority

709

set_default_priority.argtypes = [ClientSession]

664

set_default_priority.argtypes = [session_t]

710

665

set_default_priority.restype = _error_code

711

666

712

667

record_send = _library.gnutls_record_send

713

record_send.argtypes = [ClientSession, ctypes.c_void_p,

668

record_send.argtypes = [session_t, ctypes.c_void_p,

714

669

ctypes.c_size_t]

715

670

record_send.restype = ctypes.c_ssize_t

716

671

record_send.errcheck = _retry_on_error

718

673

certificate_allocate_credentials = (

719

674

_library.gnutls_certificate_allocate_credentials)

720

675

certificate_allocate_credentials.argtypes = [

721

PointerTo(Credentials)]

676

ctypes.POINTER(certificate_credentials_t)]

722

677

certificate_allocate_credentials.restype = _error_code

723

678

724

679

certificate_free_credentials = (

725

680

_library.gnutls_certificate_free_credentials)

726

certificate_free_credentials.argtypes = [Credentials]

681

certificate_free_credentials.argtypes = [

682

certificate_credentials_t]

727

683

certificate_free_credentials.restype = None

728

684

729

685

handshake_set_private_extensions = (

730

686

_library.gnutls_handshake_set_private_extensions)

731

handshake_set_private_extensions.argtypes = [ClientSession,

687

handshake_set_private_extensions.argtypes = [session_t,

732

688

ctypes.c_int]

733

689

handshake_set_private_extensions.restype = None

734

690

735

691

credentials_set = _library.gnutls_credentials_set

736

credentials_set.argtypes = [ClientSession, credentials_type_t,

737

CastToVoidPointer(Credentials)]

692

credentials_set.argtypes = [session_t, credentials_type_t,

693

ctypes.c_void_p]

738

694

credentials_set.restype = _error_code

739

695

740

696

strerror = _library.gnutls_strerror

742

698

strerror.restype = ctypes.c_char_p

743

699

744

700

certificate_type_get = _library.gnutls_certificate_type_get

745

certificate_type_get.argtypes = [ClientSession]

701

certificate_type_get.argtypes = [session_t]

746

702

certificate_type_get.restype = _error_code

747

703

748

704

certificate_get_peers = _library.gnutls_certificate_get_peers

749

certificate_get_peers.argtypes = [ClientSession,

705

certificate_get_peers.argtypes = [session_t,

750

706

ctypes.POINTER(ctypes.c_uint)]

751

707

certificate_get_peers.restype = ctypes.POINTER(datum_t)

752

708

759

715

global_set_log_function.restype = None

760

716

761

717

deinit = _library.gnutls_deinit

762

deinit.argtypes = [ClientSession]

718

deinit.argtypes = [session_t]

763

719

deinit.restype = None

764

720

765

721

handshake = _library.gnutls_handshake

766

handshake.argtypes = [ClientSession]

767

handshake.restype = ctypes.c_int

722

handshake.argtypes = [session_t]

723

handshake.restype = _error_code

768

724

handshake.errcheck = _retry_on_error

769

725

770

726

transport_set_ptr = _library.gnutls_transport_set_ptr

771

transport_set_ptr.argtypes = [ClientSession, transport_ptr_t]

727

transport_set_ptr.argtypes = [session_t, transport_ptr_t]

772

728

transport_set_ptr.restype = None

773

729

774

730

bye = _library.gnutls_bye

775

bye.argtypes = [ClientSession, close_request_t]

776

bye.restype = ctypes.c_int

731

bye.argtypes = [session_t, close_request_t]

732

bye.restype = _error_code

777

733

bye.errcheck = _retry_on_error

778

734

779

735

check_version = _library.gnutls_check_version

796

752

797

753

x509_crt_fmt_t = ctypes.c_int

798

754

799

# All the function declarations below are from

800

# gnutls/abstract.h

755

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

801

756

pubkey_init = _library.gnutls_pubkey_init

802

757

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

803

758

pubkey_init.restype = _error_code

817

772

pubkey_deinit.argtypes = [pubkey_t]

818

773

pubkey_deinit.restype = None

819

774

else:

820

# All the function declarations below are from

821

# gnutls/openpgp.h

775

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

822

776

823

777

openpgp_crt_init = _library.gnutls_openpgp_crt_init

824

778

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

830

784

openpgp_crt_fmt_t]

831

785

openpgp_crt_import.restype = _error_code

832

786

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

]

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)]

840

790

openpgp_crt_verify_self.restype = _error_code

841

791

842

792

openpgp_crt_deinit = _library.gnutls_openpgp_crt_deinit

853

803

854

804

if check_version(b"3.6.4"):

855

805

certificate_type_get2 = _library.gnutls_certificate_type_get2

856

certificate_type_get2.argtypes = [ClientSession, ctypes.c_int]

806

certificate_type_get2.argtypes = [session_t, ctypes.c_int]

857

807

certificate_type_get2.restype = _error_code

858

808

859

809

# Remove non-public functions

875

825

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

876

826

877

827

Attributes:

878

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

828

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

879

829

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

880

830

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

881

831

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

882

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

832

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

883

833

running.

884

834

checker_callback_tag: a GLib event source tag, or None

885

835

checker_command: string; External command which is run to check

1009

959

self.last_enabled = None

1010

960

self.expires = None

1011

961

1012

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

1013

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

1014

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

962

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

963

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

964

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

1015

965

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

1016

966

datetime.datetime.utcnow())

1017

967

1045

995

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

1046

996

# Already enabled

1047

997

return

998

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

1048

999

self.enabled = True

1049

1000

self.last_enabled = datetime.datetime.utcnow()

1050

1001

self.init_checker()

1055

1006

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

1056

1007

return False

1057

1008

if not quiet:

1058

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

1009

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

1059

1010

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

1060

1011

GLib.source_remove(self.disable_initiator_tag)

1061

1012

self.disable_initiator_tag = None

1073

1024

def __del__(self):

1074

1025

self.disable()

1075

1026

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.

1027

def init_checker(self):

1028

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

1029

# and every interval from then on.

1081

1030

if self.checker_initiator_tag is not None:

1082

1031

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

1090

1032

self.checker_initiator_tag = GLib.timeout_add(

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

1033

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

1034

self.start_checker)

1035

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

1100

1036

if self.disable_initiator_tag is not None:

1101

1037

GLib.source_remove(self.disable_initiator_tag)

1102

1038

self.disable_initiator_tag = GLib.timeout_add(

1103

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

1104

self.disable)

1039

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

1040

# Also start a new checker *right now*.

1041

self.start_checker()

1105

1042

1106

1043

def checker_callback(self, source, condition, connection,

1107

1044

command):

1109

1046

# Read return code from connection (see call_pipe)

1110

1047

returncode = connection.recv()

1111

1048

connection.close()

1112

if self.checker is not None:

1113

self.checker.join()

1049

self.checker.join()

1114

1050

self.checker_callback_tag = None

1115

1051

self.checker = None

1116

1052

1118

1054

self.last_checker_status = returncode

1119

1055

self.last_checker_signal = None

1120

1056

if self.last_checker_status == 0:

1121

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

1057

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

1058

vars(self))

1122

1059

self.checked_ok()

1123

1060

else:

1124

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

1061

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

1125

1062

else:

1126

1063

self.last_checker_status = -1

1127

1064

self.last_checker_signal = -returncode

1128

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

1065

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

1066

vars(self))

1129

1067

return False

1130

1068

1131

1069

def checked_ok(self):

1150

1088

def need_approval(self):

1151

1089

self.last_approval_request = datetime.datetime.utcnow()

1152

1090

1153

def start_checker(self, start_was_randomized=False):

1091

def start_checker(self):

1154

1092

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

1155

1093

1156

1094

If a checker already exists, leave it running and do

1165

1103

# should be.

1166

1104

1167

1105

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

1168

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

1106

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

1169

1107

self.checker.join()

1170

1108

self.checker = None

1171

1109

# Start a new checker if needed

1172

1110

if self.checker is None:

1173

1111

# Escape attributes for the shell

1174

1112

escaped_attrs = {

1175

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

1113

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

1176

1114

for attr in self.runtime_expansions}

1177

1115

try:

1178

1116

command = self.checker_command % escaped_attrs

1179

1117

except TypeError as error:

1180

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

1181

self.checker_command, exc_info=error)

1118

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

1119

self.checker_command,

1120

exc_info=error)

1182

1121

return True # Try again later

1183

1122

self.current_checker_command = command

1184

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

1123

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

1124

self.name)

1185

1125

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

1186

1126

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

1187

1127

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

1203

1143

kwargs=popen_args)

1204

1144

self.checker.start()

1205

1145

self.checker_callback_tag = GLib.io_add_watch(

1206

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

1207

GLib.PRIORITY_DEFAULT, GLib.IO_IN,

1146

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

1208

1147

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

1220

1148

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

1221

1149

return True

1222

1150

1227

1155

self.checker_callback_tag = None

1228

1156

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

1229

1157

return

1230

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

1158

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

1231

1159

self.checker.terminate()

1232

1160

self.checker = None

1233

1161

1260

1188

func._dbus_name = func.__name__

1261

1189

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

1262

1190

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

1263

func._dbus_get_args_options = {"byte_arrays": byte_arrays}

1191

func._dbus_get_args_options = {'byte_arrays': byte_arrays}

1264

1192

return func

1265

1193

1266

1194

return decorator

1355

1283

1356

1284

@dbus.service.method(dbus.INTROSPECTABLE_IFACE,

1357

1285

out_signature="s",

1358

path_keyword="object_path",

1359

connection_keyword="connection")

1286

path_keyword='object_path',

1287

connection_keyword='connection')

1360

1288

def Introspect(self, object_path, connection):

1361

1289

"""Overloading of standard D-Bus method.

1362

1290

1411

1339

document.unlink()

1412

1340

except (AttributeError, xml.dom.DOMException,

1413

1341

xml.parsers.expat.ExpatError) as error:

1414

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

1415

exc_info=error)

1342

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

1343

exc_info=error)

1416

1344

return xmlstring

1417

1345

1418

1346

1476

1404

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

1477

1405

"'ay' signature {!r}"

1478

1406

.format(prop._dbus_signature))

1479

value = dbus.ByteArray(bytes(value))

1407

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

1408

for byte in value))

1480

1409

prop(value)

1481

1410

1482

1411

@dbus.service.method(dbus.PROPERTIES_IFACE,

1515

1444

1516

1445

@dbus.service.method(dbus.INTROSPECTABLE_IFACE,

1517

1446

out_signature="s",

1518

path_keyword="object_path",

1519

connection_keyword="connection")

1447

path_keyword='object_path',

1448

connection_keyword='connection')

1520

1449

def Introspect(self, object_path, connection):

1521

1450

"""Overloading of standard D-Bus method.

1522

1451

1578

1507

document.unlink()

1579

1508

except (AttributeError, xml.dom.DOMException,

1580

1509

xml.parsers.expat.ExpatError) as error:

1581

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

1582

exc_info=error)

1510

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

1511

exc_info=error)

1583

1512

return xmlstring

1584

1513

1585

1514

1617

1546

1618

1547

@dbus.service.method(dbus.INTROSPECTABLE_IFACE,

1619

1548

out_signature="s",

1620

path_keyword="object_path",

1621

connection_keyword="connection")

1549

path_keyword='object_path',

1550

connection_keyword='connection')

1622

1551

def Introspect(self, object_path, connection):

1623

1552

"""Overloading of standard D-Bus method.

1624

1553

1649

1578

document.unlink()

1650

1579

except (AttributeError, xml.dom.DOMException,

1651

1580

xml.parsers.expat.ExpatError) as error:

1652

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

1653

exc_info=error)

1581

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

1582

exc_info=error)

1654

1583

return xmlstring

1655

1584

1656

1585

2290

2219

class ProxyClient:

2291

2220

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

2292

2221

self._pipe = child_pipe

2293

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

2222

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

2294

2223

if not self._pipe.recv():

2295

2224

raise KeyError(key_id or fpr)

2296

2225

2297

2226

def __getattribute__(self, name):

2298

if name == "_pipe":

2227

if name == '_pipe':

2299

2228

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

2300

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

2229

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

2301

2230

data = self._pipe.recv()

2302

if data[0] == "data":

2231

if data[0] == 'data':

2303

2232

return data[1]

2304

if data[0] == "function":

2233

if data[0] == 'function':

2305

2234

2306

2235

def func(*args, **kwargs):

2307

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

2236

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

2308

2237

return self._pipe.recv()[1]

2309

2238

2310

2239

return func

2311

2240

2312

2241

def __setattr__(self, name, value):

2313

if name == "_pipe":

2242

if name == '_pipe':

2314

2243

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

2315

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

2244

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

2316

2245

2317

2246

2318

2247

class ClientHandler(socketserver.BaseRequestHandler, object):

2323

2252

2324

2253

def handle(self):

2325

2254

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

2326

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

2327

str(self.client_address))

2328

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

2255

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

2256

str(self.client_address))

2257

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

2258

self.server.child_pipe.fileno())

2329

2259

2330

2260

session = gnutls.ClientSession(self.request)

2331

2261

2332

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

2262

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

2333

2263

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

2334

2264

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

2335

2265

# "+DHE-DSS"))

2337

2267

priority = self.server.gnutls_priority

2338

2268

if priority is None:

2339

2269

priority = "NORMAL"

2340

gnutls.priority_set_direct(session,

2341

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

2270

gnutls.priority_set_direct(session._c_object,

2271

priority.encode("utf-8"),

2272

None)

2342

2273

2343

2274

# Start communication using the Mandos protocol

2344

2275

# Get protocol number

2345

2276

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

2346

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

2277

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

2347

2278

try:

2348

2279

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

2349

2280

raise RuntimeError(line)

2350

2281

except (ValueError, IndexError, RuntimeError) as error:

2351

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

2282

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

2352

2283

return

2353

2284

2354

2285

# Start GnuTLS connection

2355

2286

try:

2356

2287

session.handshake()

2357

2288

except gnutls.Error as error:

2358

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

2289

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

2359

2290

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

2360

2291

# established. Just abandon the request.

2361

2292

return

2362

log.debug("Handshake succeeded")

2293

logger.debug("Handshake succeeded")

2363

2294

2364

2295

approval_required = False

2365

2296

try:

2369

2300

key_id = self.key_id(

2370

2301

self.peer_certificate(session))

2371

2302

except (TypeError, gnutls.Error) as error:

2372

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

2303

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

2373

2304

return

2374

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

2375

key_id.decode("utf-8",

2376

errors="replace"))

2305

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

2377

2306

2378

2307

else:

2379

2308

key_id = b""

2381

2310

fpr = self.fingerprint(

2382

2311

self.peer_certificate(session))

2383

2312

except (TypeError, gnutls.Error) as error:

2384

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

2313

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

2385

2314

return

2386

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

2315

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

2387

2316

2388

2317

try:

2389

2318

client = ProxyClient(child_pipe, key_id, fpr,

2398

2327

2399

2328

while True:

2400

2329

if not client.enabled:

2401

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

2330

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

2331

client.name)

2402

2332

if self.server.use_dbus:

2403

2333

# Emit D-Bus signal

2404

2334

client.Rejected("Disabled")

2408

2338

# We are approved or approval is disabled

2409

2339

break

2410

2340

elif client.approved is None:

2411

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

2412

client.name)

2341

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

2342

client.name)

2413

2343

if self.server.use_dbus:

2414

2344

# Emit D-Bus signal

2415

2345

client.NeedApproval(

2416

2346

client.approval_delay.total_seconds()

2417

2347

* 1000, client.approved_by_default)

2418

2348

else:

2419

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

2420

client.name)

2349

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

2350

client.name)

2421

2351

if self.server.use_dbus:

2422

2352

# Emit D-Bus signal

2423

2353

client.Rejected("Denied")

2431

2361

time2 = datetime.datetime.now()

2432

2362

if (time2 - time) >= delay:

2433

2363

if not client.approved_by_default:

2434

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

2435

" waiting for approval",

2436

client.name)

2364

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

2365

" waiting for approval",

2366

client.name)

2437

2367

if self.server.use_dbus:

2438

2368

# Emit D-Bus signal

2439

2369

client.Rejected("Approval timed out")

2446

2376

try:

2447

2377

session.send(client.secret)

2448

2378

except gnutls.Error as error:

2449

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

2379

logger.warning("gnutls send failed",

2380

exc_info=error)

2450

2381

return

2451

2382

2452

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

2383

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

2453

2384

# bump the timeout using extended_timeout

2454

2385

client.bump_timeout(client.extended_timeout)

2455

2386

if self.server.use_dbus:

2462

2393

try:

2463

2394

session.bye()

2464

2395

except gnutls.Error as error:

2465

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

2396

logger.warning("GnuTLS bye failed",

2397

exc_info=error)

2466

2398

2467

2399

@staticmethod

2468

2400

def peer_certificate(session):

2469

2401

"Return the peer's certificate as a bytestring"

2470

2402

try:

2471

cert_type = gnutls.certificate_type_get2(

2472

session, gnutls.CTYPE_PEERS)

2403

cert_type = gnutls.certificate_type_get2(session._c_object,

2404

gnutls.CTYPE_PEERS)

2473

2405

except AttributeError:

2474

cert_type = gnutls.certificate_type_get(session)

2406

cert_type = gnutls.certificate_type_get(session._c_object)

2475

2407

if gnutls.has_rawpk:

2476

2408

valid_cert_types = frozenset((gnutls.CRT_RAWPK,))

2477

2409

else:

2478

2410

valid_cert_types = frozenset((gnutls.CRT_OPENPGP,))

2479

2411

# If not a valid certificate type...

2480

2412

if cert_type not in valid_cert_types:

2481

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

2482

valid_cert_types)

2413

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

2414

valid_cert_types)

2483

2415

# ...return invalid data

2484

2416

return b""

2485

2417

list_size = ctypes.c_uint(1)

2486

2418

cert_list = (gnutls.certificate_get_peers

2487

(session, ctypes.byref(list_size)))

2419

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

2488

2420

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

2489

2421

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

2490

2422

if list_size.value == 0:

2512

2444

buf = ctypes.create_string_buffer(32)

2513

2445

buf_len = ctypes.c_size_t(len(buf))

2514

2446

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

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))

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

2452

# Deinit the certificate

2522

2453

gnutls.pubkey_deinit(pubkey)

2523

2454

2604

2535

2605

2536

class IPv6_TCPServer(MultiprocessingMixInWithPipe,

2606

2537

socketserver.TCPServer):

2607

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

2538

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

2608

2539

2609

2540

Attributes:

2610

2541

enabled: Boolean; whether this server is activated yet

2661

2592

if SO_BINDTODEVICE is None:

2662

2593

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

2663

2594

# common enough.

2664

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

2595

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

2665

2596

SO_BINDTODEVICE = 25

2666

2597

try:

2667

2598

self.socket.setsockopt(

2669

2600

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

2670

2601

except socket.error as error:

2671

2602

if error.errno == errno.EPERM:

2672

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

2673

self.interface)

2603

logger.error("No permission to bind to"

2604

" interface %s", self.interface)

2674

2605

elif error.errno == errno.ENOPROTOOPT:

2675

log.error("SO_BINDTODEVICE not available; cannot"

2676

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

2606

logger.error("SO_BINDTODEVICE not available;"

2607

" cannot bind to interface %s",

2608

self.interface)

2677

2609

elif error.errno == errno.ENODEV:

2678

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

2679

" bind", self.interface)

2610

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

2611

" cannot bind", self.interface)

2680

2612

else:

2681

2613

raise

2682

2614

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

2741

2673

def add_pipe(self, parent_pipe, proc):

2742

2674

# Call "handle_ipc" for both data and EOF events

2743

2675

GLib.io_add_watch(

2744

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

2745

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

2676

parent_pipe.fileno(),

2677

GLib.IO_IN | GLib.IO_HUP,

2746

2678

functools.partial(self.handle_ipc,

2747

2679

parent_pipe=parent_pipe,

2748

2680

proc=proc))

2761

2693

request = parent_pipe.recv()

2762

2694

command = request[0]

2763

2695

2764

if command == "init":

2696

if command == 'init':

2765

2697

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

2766

2698

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

2767

2699

address = request[3]

2768

2700

2769

2701

for c in self.clients.values():

2770

if key_id == ("E3B0C44298FC1C149AFBF4C8996FB924"

2771

"27AE41E4649B934CA495991B7852B855"):

2702

if key_id == "E3B0C44298FC1C149AFBF4C8996FB92427AE41E4649B934CA495991B7852B855":

2772

2703

continue

2773

2704

if key_id and c.key_id == key_id:

2774

2705

client = c

2777

2708

client = c

2778

2709

break

2779

2710

else:

2780

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

2781

" %s", key_id or fpr, address)

2711

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

2712

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

2782

2713

if self.use_dbus:

2783

2714

# Emit D-Bus signal

2784

2715

mandos_dbus_service.ClientNotFound(key_id or fpr,

2787

2718

return False

2788

2719

2789

2720

GLib.io_add_watch(

2790

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

2791

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

2721

parent_pipe.fileno(),

2722

GLib.IO_IN | GLib.IO_HUP,

2792

2723

functools.partial(self.handle_ipc,

2793

2724

parent_pipe=parent_pipe,

2794

2725

proc=proc,

2797

2728

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

2798

2729

# same fileno

2799

2730

return False

2800

if command == "funcall":

2731

if command == 'funcall':

2801

2732

funcname = request[1]

2802

2733

args = request[2]

2803

2734

kwargs = request[3]

2804

2735

2805

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

2736

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

2806

2737

funcname)(*args,

2807

2738

**kwargs)))

2808

2739

2809

if command == "getattr":

2740

if command == 'getattr':

2810

2741

attrname = request[1]

2811

2742

if isinstance(client_object.__getattribute__(attrname),

2812

collections.abc.Callable):

2813

parent_pipe.send(("function", ))

2743

collections.Callable):

2744

parent_pipe.send(('function', ))

2814

2745

else:

2815

2746

parent_pipe.send((

2816

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

2747

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

2817

2748

2818

if command == "setattr":

2749

if command == 'setattr':

2819

2750

attrname = request[1]

2820

2751

value = request[2]

2821

2752

setattr(client_object, attrname, value)

2826

2757

def rfc3339_duration_to_delta(duration):

2827

2758

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

2828

2759

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

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)

2845

2774

"""

2846

2775

2847

2776

# Parsing an RFC 3339 duration with regular expressions is not

2927

2856

def string_to_delta(interval):

2928

2857

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

2929

2858

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

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)

2942

2871

"""

2943

2872

2944

2873

try:

3046

2975

3047

2976

options = parser.parse_args()

3048

2977

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

3049

2983

# Default values for config file for server-global settings

3050

2984

if gnutls.has_rawpk:

3051

2985

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

3147

3081

3148

3082

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

3149

3083

syslogger.setFormatter(

3150

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

3151

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

3084

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

3085

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

3152

3086

server_settings["servicename"])))

3153

3087

3154

3088

# Parse config file with clients

3178

3112

try:

3179

3113

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

3180

3114

except IOError as e:

3181

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

3182

exc_info=e)

3115

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

3116

exc_info=e)

3183

3117

3184

3118

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

3185

3119

("mandos", "mandos"),

3196

3130

try:

3197

3131

os.setgid(gid)

3198

3132

os.setuid(uid)

3199

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

3133

if debug:

3134

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

3135

gid))

3200

3136

except OSError as error:

3201

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

3202

os.strerror(error.errno))

3137

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

3138

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

3203

3139

if error.errno != errno.EPERM:

3204

3140

raise

3205

3141

3212

3148

3213

3149

@gnutls.log_func

3214

3150

def debug_gnutls(level, string):

3215

log.debug("GnuTLS: %s",

3216

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

3151

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

3217

3152

3218

3153

gnutls.global_set_log_function(debug_gnutls)

3219

3154

3248

3183

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

3249

3184

do_not_queue=True)

3250

3185

except dbus.exceptions.DBusException as e:

3251

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

3186

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

3252

3187

use_dbus = False

3253

3188

server_settings["use_dbus"] = False

3254

3189

tcp_server.use_dbus = False

3313

3248

if isinstance(s, bytes)

3314

3249

else s) for s in

3315

3250

value["client_structure"]]

3316

# .name, .host, and .checker_command

3317

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

3251

# .name & .host

3252

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

3318

3253

if isinstance(value[k], bytes):

3319

3254

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

3320

3255

if "key_id" not in value:

3330

3265

for key, value in

3331

3266

bytes_old_client_settings.items()}

3332

3267

del bytes_old_client_settings

3333

# .host and .checker_command

3268

# .host

3334

3269

for value in old_client_settings.values():

3335

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

3336

if isinstance(value[attribute], bytes):

3337

value[attribute] = (value[attribute]

3338

.decode("utf-8"))

3270

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

3271

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

3272

.decode("utf-8"))

3339

3273

os.remove(stored_state_path)

3340

3274

except IOError as e:

3341

3275

if e.errno == errno.ENOENT:

3342

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

3343

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

3276

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

3277

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

3344

3278

else:

3345

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

3346

exc_info=e)

3279

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

3280

exc_info=e)

3347

3281

raise

3348

3282

except EOFError as e:

3349

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

3350

exc_info=e)

3283

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

3284

"EOFError:",

3285

exc_info=e)

3351

3286

3352

3287

with PGPEngine() as pgp:

3353

3288

for client_name, client in clients_data.items():

3380

3315

if client["enabled"]:

3381

3316

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

3382

3317

if not client["last_checked_ok"]:

3383

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

3384

" never performed a successful"

3385

" checker", client_name)

3318

logger.warning(

3319

"disabling client {} - Client never "

3320

"performed a successful checker".format(

3321

client_name))

3386

3322

client["enabled"] = False

3387

3323

elif client["last_checker_status"] != 0:

3388

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

3389

" last checker failed with error"

3390

" code %s", client_name,

3391

client["last_checker_status"])

3324

logger.warning(

3325

"disabling client {} - Client last"

3326

" checker failed with error code"

3327

" {}".format(

3328

client_name,

3329

client["last_checker_status"]))

3392

3330

client["enabled"] = False

3393

3331

else:

3394

3332

client["expires"] = (

3395

3333

datetime.datetime.utcnow()

3396

3334

+ client["timeout"])

3397

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

3398

" enabled", client_name)

3335

logger.debug("Last checker succeeded,"

3336

" keeping {} enabled".format(

3337

client_name))

3399

3338

try:

3400

3339

client["secret"] = pgp.decrypt(

3401

3340

client["encrypted_secret"],

3402

3341

client_settings[client_name]["secret"])

3403

3342

except PGPError:

3404

3343

# If decryption fails, we use secret from new settings

3405

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

3406

client_name)

3344

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

3345

client_name))

3407

3346

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

3408

3347

["secret"])

3409

3348

3423

3362

server_settings=server_settings)

3424

3363

3425

3364

if not tcp_server.clients:

3426

log.warning("No clients defined")

3365

logger.warning("No clients defined")

3427

3366

3428

3367

if not foreground:

3429

3368

if pidfile is not None:

3432

3371

with pidfile:

3433

3372

print(pid, file=pidfile)

3434

3373

except IOError:

3435

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

3436

pidfilename, pid)

3374

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

3375

pidfilename, pid)

3437

3376

del pidfile

3438

3377

del pidfilename

3439

3378

3589

3528

3590

3529

try:

3591

3530

with tempfile.NamedTemporaryFile(

3592

mode="wb",

3531

mode='wb',

3593

3532

suffix=".pickle",

3594

prefix="clients-",

3533

prefix='clients-',

3595

3534

dir=os.path.dirname(stored_state_path),

3596

3535

delete=False) as stored_state:

3597

3536

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

3605

3544

except NameError:

3606

3545

pass

3607

3546

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

3608

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

3609

os.strerror(e.errno))

3547

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

3548

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

3610

3549

else:

3611

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

3612

exc_info=e)

3550

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

3551

exc_info=e)

3613

3552

raise

3614

3553

3615

3554

# Delete all clients, and settings from config

3632

3571

mandos_dbus_service.client_added_signal(client)

3633

3572

# Need to initiate checking of clients

3634

3573

if client.enabled:

3635

client.init_checker(randomize_start=True)

3574

client.init_checker()

3636

3575

3637

3576

tcp_server.enable()

3638

3577

tcp_server.server_activate()

3641

3580

if zeroconf:

3642

3581

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

3643

3582

if use_ipv6:

3644

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

3645

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

3583

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

3584

" flowinfo %d, scope_id %d",

3585

*tcp_server.socket.getsockname())

3646

3586

else: # IPv4

3647

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

3648

*tcp_server.socket.getsockname())

3587

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

3588

*tcp_server.socket.getsockname())

3649

3589

3650

3590

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

3651

3591

3655

3595

try:

3656

3596

service.activate()

3657

3597

except dbus.exceptions.DBusException as error:

3658

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

3598

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

3659

3599

cleanup()

3660

3600

sys.exit(1)

3661

3601

# End of Avahi example code

3662

3602

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))

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))

3668

3607

3669

log.debug("Starting main loop")

3608

logger.debug("Starting main loop")

3670

3609

main_loop.run()

3671

3610

except AvahiError as error:

3672

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

3611

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

3673

3612

cleanup()

3674

3613

sys.exit(1)

3675

3614

except KeyboardInterrupt:

3676

3615

if debug:

3677

3616

print("", file=sys.stderr)

3678

log.debug("Server received KeyboardInterrupt")

3679

log.debug("Server exiting")

3617

logger.debug("Server received KeyboardInterrupt")

3618

logger.debug("Server exiting")

3680

3619

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

3681

3620

cleanup()

3682

3621

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:

3622

3623

if __name__ == '__main__':

3624

main()