/mandos/trunk : revision 1246

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#!/usr/bin/python3 -bI

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

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# -*- mode: python; after-save-hook: (lambda () (let ((command (if (fboundp 'file-local-name) (file-local-name (buffer-file-name)) (or (file-remote-p (buffer-file-name) 'localname) (buffer-file-name))))) (if (= (progn (if (get-buffer "*Test*") (kill-buffer "*Test*")) (process-file-shell-command (format "%s --check" (shell-quote-argument command)) nil "*Test*")) 0) (let ((w (get-buffer-window "*Test*"))) (if w (delete-window w))) (progn (with-current-buffer "*Test*" (compilation-mode)) (display-buffer "*Test*" '(display-buffer-in-side-window)))))); 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 unittest

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import random

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import shlex

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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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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 = "1.8.14"

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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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logger = logging.getLogger()

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

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syslogger = None

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

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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)

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

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self.cleanup()

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os._exit(1)

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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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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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def entry_group_state_changed(self, state, error):

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

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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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if state == avahi.ENTRY_GROUP_ESTABLISHED:

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log.debug("Zeroconf service established.")

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logger.debug("Zeroconf service established.")

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elif state == avahi.ENTRY_GROUP_COLLISION:

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

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

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str(error))

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

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str(error))

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raise AvahiGroupError("State changed: {!s}".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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log.debug("Avahi server state change: %i", state)

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logger.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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log.error(bad_states[state])

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logger.error(bad_states[state])

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else:

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

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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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== "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"

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" 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)

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

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self.cleanup()

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os._exit(1)

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else:

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if error is None:

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

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

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else:

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

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

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def activate(self):

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

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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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531

.format(self.name)))

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return ret

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certificate_type_t = ctypes.c_int

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class datum_t(ctypes.Structure):

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

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("size", ctypes.c_uint)]

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

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('size', ctypes.c_uint)]

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class _openpgp_crt_int(ctypes.Structure):

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_fields_ = []

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# Error handling functions

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def _error_code(result):

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

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

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

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680

if result >= gnutls.E_SUCCESS:

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681

return result

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if result == gnutls.E_NO_CERTIFICATE_FOUND:

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def _retry_on_error(result, func, arguments,

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_error_code=_error_code):

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

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

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

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690

while result < gnutls.E_SUCCESS:

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691

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

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692

return _error_code(result)

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

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877

878

Attributes:

878

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

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

879

880

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

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881

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

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882

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

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

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

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running.

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checker_callback_tag: a GLib event source tag, or None

885

886

checker_command: string; External command which is run to check

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1010

self.last_enabled = None

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1011

self.expires = None

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

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

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

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

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

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

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1016

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

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datetime.datetime.utcnow())

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1018

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1046

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

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# Already enabled

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return

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

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1050

self.enabled = True

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1051

self.last_enabled = datetime.datetime.utcnow()

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self.init_checker()

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1057

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

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1058

return False

1057

1059

if not quiet:

1058

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

1060

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

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1061

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

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1062

GLib.source_remove(self.disable_initiator_tag)

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1063

self.disable_initiator_tag = None

1073

1075

def __del__(self):

1074

1076

self.disable()

1075

1077

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.

1078

def init_checker(self):

1079

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

1080

# and every interval from then on.

1081

if self.checker_initiator_tag is not None:

1082

GLib.source_remove(self.checker_initiator_tag)

1083

interval_milliseconds = int(self.interval.total_seconds()

1084

* 1000)

1085

if randomize_start:

1086

delay_milliseconds = random.randrange(

1087

interval_milliseconds + 1)

1088

else:

1089

delay_milliseconds = interval_milliseconds

1090

1083

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

1084

random.randrange(int(self.interval.total_seconds() * 1000

1085

+ 1)),

1086

self.start_checker)

1087

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

1100

1088

if self.disable_initiator_tag is not None:

1101

1089

GLib.source_remove(self.disable_initiator_tag)

1102

1090

self.disable_initiator_tag = GLib.timeout_add(

1103

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

1104

self.disable)

1091

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

1092

# Also start a new checker *right now*.

1093

self.start_checker()

1105

1094

1106

1095

def checker_callback(self, source, condition, connection,

1107

1096

command):

1118

1107

self.last_checker_status = returncode

1119

1108

self.last_checker_signal = None

1120

1109

if self.last_checker_status == 0:

1121

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

1110

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

1111

vars(self))

1122

1112

self.checked_ok()

1123

1113

else:

1124

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

1114

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

1125

1115

else:

1126

1116

self.last_checker_status = -1

1127

1117

self.last_checker_signal = -returncode

1128

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

1118

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

1119

vars(self))

1129

1120

return False

1130

1121

1131

1122

def checked_ok(self):

1150

1141

def need_approval(self):

1151

1142

self.last_approval_request = datetime.datetime.utcnow()

1152

1143

1153

def start_checker(self, start_was_randomized=False):

1144

def start_checker(self):

1154

1145

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

1155

1146

1156

1147

If a checker already exists, leave it running and do

1165

1156

# should be.

1166

1157

1167

1158

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

1168

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

1159

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

1169

1160

self.checker.join()

1170

1161

self.checker = None

1171

1162

# Start a new checker if needed

1177

1168

try:

1178

1169

command = self.checker_command % escaped_attrs

1179

1170

except TypeError as error:

1180

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

1181

self.checker_command, exc_info=error)

1171

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

1172

self.checker_command,

1173

exc_info=error)

1182

1174

return True # Try again later

1183

1175

self.current_checker_command = command

1184

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

1176

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

1177

self.name)

1185

1178

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

1186

1179

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

1187

1180

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

1206

1199

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

1207

1200

GLib.PRIORITY_DEFAULT, GLib.IO_IN,

1208

1201

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

1202

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

1221

1203

return True

1222

1204

1227

1209

self.checker_callback_tag = None

1228

1210

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

1229

1211

return

1230

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

1212

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

1231

1213

self.checker.terminate()

1232

1214

self.checker = None

1233

1215

1260

1242

func._dbus_name = func.__name__

1261

1243

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

1262

1244

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

1263

func._dbus_get_args_options = {"byte_arrays": byte_arrays}

1245

func._dbus_get_args_options = {'byte_arrays': byte_arrays}

1264

1246

return func

1265

1247

1266

1248

return decorator

1355

1337

1356

1338

@dbus.service.method(dbus.INTROSPECTABLE_IFACE,

1357

1339

out_signature="s",

1358

path_keyword="object_path",

1359

connection_keyword="connection")

1340

path_keyword='object_path',

1341

connection_keyword='connection')

1360

1342

def Introspect(self, object_path, connection):

1361

1343

"""Overloading of standard D-Bus method.

1362

1344

1411

1393

document.unlink()

1412

1394

except (AttributeError, xml.dom.DOMException,

1413

1395

xml.parsers.expat.ExpatError) as error:

1414

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

1415

exc_info=error)

1396

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

1397

exc_info=error)

1416

1398

return xmlstring

1417

1399

1418

1400

1515

1497

1516

1498

@dbus.service.method(dbus.INTROSPECTABLE_IFACE,

1517

1499

out_signature="s",

1518

path_keyword="object_path",

1519

connection_keyword="connection")

1500

path_keyword='object_path',

1501

connection_keyword='connection')

1520

1502

def Introspect(self, object_path, connection):

1521

1503

"""Overloading of standard D-Bus method.

1522

1504

1578

1560

document.unlink()

1579

1561

except (AttributeError, xml.dom.DOMException,

1580

1562

xml.parsers.expat.ExpatError) as error:

1581

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

1582

exc_info=error)

1563

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

1564

exc_info=error)

1583

1565

return xmlstring

1584

1566

1585

1567

1617

1599

1618

1600

@dbus.service.method(dbus.INTROSPECTABLE_IFACE,

1619

1601

out_signature="s",

1620

path_keyword="object_path",

1621

connection_keyword="connection")

1602

path_keyword='object_path',

1603

connection_keyword='connection')

1622

1604

def Introspect(self, object_path, connection):

1623

1605

"""Overloading of standard D-Bus method.

1624

1606

1649

1631

document.unlink()

1650

1632

except (AttributeError, xml.dom.DOMException,

1651

1633

xml.parsers.expat.ExpatError) as error:

1652

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

1653

exc_info=error)

1634

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

1635

exc_info=error)

1654

1636

return xmlstring

1655

1637

1656

1638

2290

2272

class ProxyClient:

2291

2273

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

2292

2274

self._pipe = child_pipe

2293

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

2275

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

2294

2276

if not self._pipe.recv():

2295

2277

raise KeyError(key_id or fpr)

2296

2278

2297

2279

def __getattribute__(self, name):

2298

if name == "_pipe":

2280

if name == '_pipe':

2299

2281

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

2300

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

2282

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

2301

2283

data = self._pipe.recv()

2302

if data[0] == "data":

2284

if data[0] == 'data':

2303

2285

return data[1]

2304

if data[0] == "function":

2286

if data[0] == 'function':

2305

2287

2306

2288

def func(*args, **kwargs):

2307

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

2289

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

2308

2290

return self._pipe.recv()[1]

2309

2291

2310

2292

return func

2311

2293

2312

2294

def __setattr__(self, name, value):

2313

if name == "_pipe":

2295

if name == '_pipe':

2314

2296

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

2315

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

2297

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

2316

2298

2317

2299

2318

2300

class ClientHandler(socketserver.BaseRequestHandler, object):

2323

2305

2324

2306

def handle(self):

2325

2307

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())

2308

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

2309

str(self.client_address))

2310

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

2311

self.server.child_pipe.fileno())

2329

2312

2330

2313

session = gnutls.ClientSession(self.request)

2331

2314

2332

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

2315

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

2333

2316

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

2334

2317

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

2335

2318

# "+DHE-DSS"))

2343

2326

# Start communication using the Mandos protocol

2344

2327

# Get protocol number

2345

2328

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

2346

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

2329

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

2347

2330

try:

2348

2331

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

2349

2332

raise RuntimeError(line)

2350

2333

except (ValueError, IndexError, RuntimeError) as error:

2351

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

2334

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

2352

2335

return

2353

2336

2354

2337

# Start GnuTLS connection

2355

2338

try:

2356

2339

session.handshake()

2357

2340

except gnutls.Error as error:

2358

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

2341

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

2359

2342

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

2360

2343

# established. Just abandon the request.

2361

2344

return

2362

log.debug("Handshake succeeded")

2345

logger.debug("Handshake succeeded")

2363

2346

2364

2347

approval_required = False

2365

2348

try:

2369

2352

key_id = self.key_id(

2370

2353

self.peer_certificate(session))

2371

2354

except (TypeError, gnutls.Error) as error:

2372

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

2355

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

2373

2356

return

2374

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

2375

key_id.decode("utf-8",

2376

errors="replace"))

2357

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

2358

key_id.decode("utf-8",

2359

errors="replace"))

2377

2360

2378

2361

else:

2379

2362

key_id = b""

2381

2364

fpr = self.fingerprint(

2382

2365

self.peer_certificate(session))

2383

2366

except (TypeError, gnutls.Error) as error:

2384

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

2367

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

2385

2368

return

2386

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

2369

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

2387

2370

2388

2371

try:

2389

2372

client = ProxyClient(child_pipe, key_id, fpr,

2398

2381

2399

2382

while True:

2400

2383

if not client.enabled:

2401

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

2384

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

2385

client.name)

2402

2386

if self.server.use_dbus:

2403

2387

# Emit D-Bus signal

2404

2388

client.Rejected("Disabled")

2408

2392

# We are approved or approval is disabled

2409

2393

break

2410

2394

elif client.approved is None:

2411

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

2412

client.name)

2395

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

2396

client.name)

2413

2397

if self.server.use_dbus:

2414

2398

# Emit D-Bus signal

2415

2399

client.NeedApproval(

2416

2400

client.approval_delay.total_seconds()

2417

2401

* 1000, client.approved_by_default)

2418

2402

else:

2419

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

2420

client.name)

2403

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

2404

client.name)

2421

2405

if self.server.use_dbus:

2422

2406

# Emit D-Bus signal

2423

2407

client.Rejected("Denied")

2431

2415

time2 = datetime.datetime.now()

2432

2416

if (time2 - time) >= delay:

2433

2417

if not client.approved_by_default:

2434

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

2435

" waiting for approval",

2436

client.name)

2418

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

2419

" waiting for approval",

2420

client.name)

2437

2421

if self.server.use_dbus:

2438

2422

# Emit D-Bus signal

2439

2423

client.Rejected("Approval timed out")

2446

2430

try:

2447

2431

session.send(client.secret)

2448

2432

except gnutls.Error as error:

2449

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

2433

logger.warning("gnutls send failed",

2434

exc_info=error)

2450

2435

return

2451

2436

2452

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

2437

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

2453

2438

# bump the timeout using extended_timeout

2454

2439

client.bump_timeout(client.extended_timeout)

2455

2440

if self.server.use_dbus:

2462

2447

try:

2463

2448

session.bye()

2464

2449

except gnutls.Error as error:

2465

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

2450

logger.warning("GnuTLS bye failed",

2451

exc_info=error)

2466

2452

2467

2453

@staticmethod

2468

2454

def peer_certificate(session):

2478

2464

valid_cert_types = frozenset((gnutls.CRT_OPENPGP,))

2479

2465

# If not a valid certificate type...

2480

2466

if cert_type not in valid_cert_types:

2481

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

2482

valid_cert_types)

2467

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

2468

valid_cert_types)

2483

2469

# ...return invalid data

2484

2470

return b""

2485

2471

list_size = ctypes.c_uint(1)

2604

2590

2605

2591

class IPv6_TCPServer(MultiprocessingMixInWithPipe,

2606

2592

socketserver.TCPServer):

2607

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

2593

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

2608

2594

2609

2595

Attributes:

2610

2596

enabled: Boolean; whether this server is activated yet

2661

2647

if SO_BINDTODEVICE is None:

2662

2648

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

2663

2649

# common enough.

2664

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

2650

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

2665

2651

SO_BINDTODEVICE = 25

2666

2652

try:

2667

2653

self.socket.setsockopt(

2669

2655

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

2670

2656

except socket.error as error:

2671

2657

if error.errno == errno.EPERM:

2672

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

2673

self.interface)

2658

logger.error("No permission to bind to"

2659

" interface %s", self.interface)

2674

2660

elif error.errno == errno.ENOPROTOOPT:

2675

log.error("SO_BINDTODEVICE not available; cannot"

2676

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

2661

logger.error("SO_BINDTODEVICE not available;"

2662

" cannot bind to interface %s",

2663

self.interface)

2677

2664

elif error.errno == errno.ENODEV:

2678

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

2679

" bind", self.interface)

2665

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

2666

" cannot bind", self.interface)

2680

2667

else:

2681

2668

raise

2682

2669

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

2761

2748

request = parent_pipe.recv()

2762

2749

command = request[0]

2763

2750

2764

if command == "init":

2751

if command == 'init':

2765

2752

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

2766

2753

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

2767

2754

address = request[3]

2777

2764

client = c

2778

2765

break

2779

2766

else:

2780

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

2781

" %s", key_id or fpr, address)

2767

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

2768

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

2782

2769

if self.use_dbus:

2783

2770

# Emit D-Bus signal

2784

2771

mandos_dbus_service.ClientNotFound(key_id or fpr,

2797

2784

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

2798

2785

# same fileno

2799

2786

return False

2800

if command == "funcall":

2787

if command == 'funcall':

2801

2788

funcname = request[1]

2802

2789

args = request[2]

2803

2790

kwargs = request[3]

2804

2791

2805

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

2792

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

2806

2793

funcname)(*args,

2807

2794

**kwargs)))

2808

2795

2809

if command == "getattr":

2796

if command == 'getattr':

2810

2797

attrname = request[1]

2811

2798

if isinstance(client_object.__getattribute__(attrname),

2812

2799

collections.abc.Callable):

2813

parent_pipe.send(("function", ))

2800

parent_pipe.send(('function', ))

2814

2801

else:

2815

2802

parent_pipe.send((

2816

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

2803

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

2817

2804

2818

if command == "setattr":

2805

if command == 'setattr':

2819

2806

attrname = request[1]

2820

2807

value = request[2]

2821

2808

setattr(client_object, attrname, value)

2927

2914

def string_to_delta(interval):

2928

2915

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

2929

2916

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)

2917

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

2918

True

2919

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

2920

True

2921

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

2922

True

2923

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

2924

True

2925

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

2926

True

2927

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

2941

2928

True

2942

2929

"""

2943

2930

3147

3134

3148

3135

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

3149

3136

syslogger.setFormatter(

3150

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

3151

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

3137

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

3138

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

3152

3139

server_settings["servicename"])))

3153

3140

3154

3141

# Parse config file with clients

3178

3165

try:

3179

3166

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

3180

3167

except IOError as e:

3181

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

3182

exc_info=e)

3168

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

3169

exc_info=e)

3183

3170

3184

3171

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

3185

3172

("mandos", "mandos"),

3196

3183

try:

3197

3184

os.setgid(gid)

3198

3185

os.setuid(uid)

3199

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

3186

if debug:

3187

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

3188

gid))

3200

3189

except OSError as error:

3201

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

3202

os.strerror(error.errno))

3190

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

3191

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

3203

3192

if error.errno != errno.EPERM:

3204

3193

raise

3205

3194

3212

3201

3213

3202

@gnutls.log_func

3214

3203

def debug_gnutls(level, string):

3215

log.debug("GnuTLS: %s",

3216

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

3204

logger.debug("GnuTLS: %s",

3205

string[:-1].decode("utf-8",

3206

errors="replace"))

3217

3207

3218

3208

gnutls.global_set_log_function(debug_gnutls)

3219

3209

3248

3238

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

3249

3239

do_not_queue=True)

3250

3240

except dbus.exceptions.DBusException as e:

3251

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

3241

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

3252

3242

use_dbus = False

3253

3243

server_settings["use_dbus"] = False

3254

3244

tcp_server.use_dbus = False

3339

3329

os.remove(stored_state_path)

3340

3330

except IOError as e:

3341

3331

if e.errno == errno.ENOENT:

3342

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

3343

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

3332

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

3333

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

3344

3334

else:

3345

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

3346

exc_info=e)

3335

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

3336

exc_info=e)

3347

3337

raise

3348

3338

except EOFError as e:

3349

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

3350

exc_info=e)

3339

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

3340

"EOFError:",

3341

exc_info=e)

3351

3342

3352

3343

with PGPEngine() as pgp:

3353

3344

for client_name, client in clients_data.items():

3380

3371

if client["enabled"]:

3381

3372

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

3382

3373

if not client["last_checked_ok"]:

3383

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

3384

" never performed a successful"

3385

" checker", client_name)

3374

logger.warning(

3375

"disabling client {} - Client never "

3376

"performed a successful checker".format(

3377

client_name))

3386

3378

client["enabled"] = False

3387

3379

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"])

3380

logger.warning(

3381

"disabling client {} - Client last"

3382

" checker failed with error code"

3383

" {}".format(

3384

client_name,

3385

client["last_checker_status"]))

3392

3386

client["enabled"] = False

3393

3387

else:

3394

3388

client["expires"] = (

3395

3389

datetime.datetime.utcnow()

3396

3390

+ client["timeout"])

3397

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

3398

" enabled", client_name)

3391

logger.debug("Last checker succeeded,"

3392

" keeping {} enabled".format(

3393

client_name))

3399

3394

try:

3400

3395

client["secret"] = pgp.decrypt(

3401

3396

client["encrypted_secret"],

3402

3397

client_settings[client_name]["secret"])

3403

3398

except PGPError:

3404

3399

# If decryption fails, we use secret from new settings

3405

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

3406

client_name)

3400

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

3401

client_name))

3407

3402

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

3408

3403

["secret"])

3409

3404

3423

3418

server_settings=server_settings)

3424

3419

3425

3420

if not tcp_server.clients:

3426

log.warning("No clients defined")

3421

logger.warning("No clients defined")

3427

3422

3428

3423

if not foreground:

3429

3424

if pidfile is not None:

3432

3427

with pidfile:

3433

3428

print(pid, file=pidfile)

3434

3429

except IOError:

3435

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

3436

pidfilename, pid)

3430

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

3431

pidfilename, pid)

3437

3432

del pidfile

3438

3433

del pidfilename

3439

3434

3589

3584

3590

3585

try:

3591

3586

with tempfile.NamedTemporaryFile(

3592

mode="wb",

3587

mode='wb',

3593

3588

suffix=".pickle",

3594

prefix="clients-",

3589

prefix='clients-',

3595

3590

dir=os.path.dirname(stored_state_path),

3596

3591

delete=False) as stored_state:

3597

3592

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

3605

3600

except NameError:

3606

3601

pass

3607

3602

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

3608

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

3609

os.strerror(e.errno))

3603

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

3604

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

3610

3605

else:

3611

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

3612

exc_info=e)

3606

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

3607

exc_info=e)

3613

3608

raise

3614

3609

3615

3610

# Delete all clients, and settings from config

3632

3627

mandos_dbus_service.client_added_signal(client)

3633

3628

# Need to initiate checking of clients

3634

3629

if client.enabled:

3635

client.init_checker(randomize_start=True)

3630

client.init_checker()

3636

3631

3637

3632

tcp_server.enable()

3638

3633

tcp_server.server_activate()

3641

3636

if zeroconf:

3642

3637

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

3643

3638

if use_ipv6:

3644

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

3645

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

3639

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

3640

" flowinfo %d, scope_id %d",

3641

*tcp_server.socket.getsockname())

3646

3642

else: # IPv4

3647

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

3648

*tcp_server.socket.getsockname())

3643

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

3644

*tcp_server.socket.getsockname())

3649

3645

3650

3646

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

3651

3647

3655

3651

try:

3656

3652

service.activate()

3657

3653

except dbus.exceptions.DBusException as error:

3658

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

3654

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

3659

3655

cleanup()

3660

3656

sys.exit(1)

3661

3657

# End of Avahi example code

3666

3662

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

3667

3663

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

3668

3664

3669

log.debug("Starting main loop")

3665

logger.debug("Starting main loop")

3670

3666

main_loop.run()

3671

3667

except AvahiError as error:

3672

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

3668

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

3673

3669

cleanup()

3674

3670

sys.exit(1)

3675

3671

except KeyboardInterrupt:

3676

3672

if debug:

3677

3673

print("", file=sys.stderr)

3678

log.debug("Server received KeyboardInterrupt")

3679

log.debug("Server exiting")

3674

logger.debug("Server received KeyboardInterrupt")

3675

logger.debug("Server exiting")

3680

3676

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

3681

3677

cleanup()

3682

3678

3683

3679

3684

def parse_test_args():

3685

# type: () -> argparse.Namespace

3680

def should_only_run_tests():

3686

3681

parser = argparse.ArgumentParser(add_help=False)

3687

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

3688

parser.add_argument("--prefix", )

3682

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

3689

3683

args, unknown_args = parser.parse_known_args()

3690

if args.check:

3691

# Remove test options from sys.argv

3684

run_tests = args.check

3685

if run_tests:

3686

# Remove --check argument from sys.argv

3692

3687

sys.argv[1:] = unknown_args

3693

return args

3688

return run_tests

3694

3689

3695

3690

# Add all tests from doctest strings

3696

3691

def load_tests(loader, tests, none):

3698

3693

tests.addTests(doctest.DocTestSuite())

3699

3694

return tests

3700

3695

3701

if __name__ == "__main__":

3702

options = parse_test_args()

3696

if __name__ == '__main__':

3703

3697

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=[""])

3698

if should_only_run_tests():

3699

# Call using ./mandos --check [--verbose]

3700

unittest.main()

3716

3701

else:

3717

3702

main()

3718

3703

finally:

3719

3704

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: