/mandos/trunk : revision 1245

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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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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"):

413

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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435

avahi.DBUS_INTERFACE_ENTRY_GROUP)

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self.entry_group_state_changed_match = (

437

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(

442

self.interface,

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self.protocol,

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451

def entry_group_state_changed(self, state, error):

452

"""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

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()

460

elif state == avahi.ENTRY_GROUP_FAILURE:

461

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

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str(error))

461

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

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str(error))

463

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):

477

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

478

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

478

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

479

bad_states = {

480

avahi.SERVER_INVALID: "Zeroconf server invalid",

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avahi.SERVER_REGISTERING: None,

485

if state in bad_states:

486

if bad_states[state] is not None:

487

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)

490

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

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self.cleanup()

492

elif state == avahi.SERVER_RUNNING:

493

try:

495

except dbus.exceptions.DBusException as error:

496

if (error.get_dbus_name()

497

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

498

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

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logger.info("Local Zeroconf service name"

499

" collision.")

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500

return self.rename(remove=False)

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501

else:

501

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

502

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

502

503

self.cleanup()

503

504

os._exit(1)

504

505

else:

505

506

if error is None:

506

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

507

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

507

508

else:

508

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

509

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

509

510

511

def activate(self):

511

512

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

526

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

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**kwargs)

528

529

syslogger.setFormatter(logging.Formatter(

529

"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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532

return ret

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certificate_type_t = ctypes.c_int

574

575

576

class datum_t(ctypes.Structure):

576

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

577

("size", ctypes.c_uint)]

577

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

578

('size', ctypes.c_uint)]

578

579

580

class _openpgp_crt_int(ctypes.Structure):

580

581

_fields_ = []

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676

# Error handling functions

676

677

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"""

679

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

679

680

if result >= gnutls.E_SUCCESS:

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681

return result

681

682

if result == gnutls.E_NO_CERTIFICATE_FOUND:

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686

def _retry_on_error(result, func, arguments,

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_error_code=_error_code):

687

688

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

688

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

689

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

689

690

while result < gnutls.E_SUCCESS:

690

691

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

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692

return _error_code(result)

875

876

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

876

877

878

Attributes:

878

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

879

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

879

880

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

880

881

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

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882

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

882

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

883

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

883

884

running.

884

885

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

1010

1011

self.expires = None

1011

1012

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

1013

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

1014

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

1013

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

1014

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

1015

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

1015

1016

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

1016

1017

datetime.datetime.utcnow())

1017

1018

1056

1057

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

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1058

return False

1058

1059

if not quiet:

1059

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)

1062

1063

self.disable_initiator_tag = None

1106

1107

self.last_checker_status = returncode

1107

1108

self.last_checker_signal = None

1108

1109

if self.last_checker_status == 0:

1109

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

1110

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

1111

vars(self))

1110

1112

self.checked_ok()

1111

1113

else:

1112

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

1114

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

1113

1115

else:

1114

1116

self.last_checker_status = -1

1115

1117

self.last_checker_signal = -returncode

1116

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

1118

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

1119

vars(self))

1117

1120

return False

1118

1121

1119

1122

def checked_ok(self):

1153

1156

# should be.

1154

1157

1155

1158

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

1156

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

1159

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

1157

1160

self.checker.join()

1158

1161

self.checker = None

1159

1162

# Start a new checker if needed

1165

1168

try:

1166

1169

command = self.checker_command % escaped_attrs

1167

1170

except TypeError as error:

1168

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

1169

self.checker_command, exc_info=error)

1171

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

1172

self.checker_command,

1173

exc_info=error)

1170

1174

return True # Try again later

1171

1175

self.current_checker_command = command

1172

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

1176

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

1177

self.name)

1173

1178

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

1174

1179

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

1175

1180

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

1204

1209

self.checker_callback_tag = None

1205

1210

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

1206

1211

return

1207

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

1212

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

1208

1213

self.checker.terminate()

1209

1214

self.checker = None

1210

1215

1237

1242

func._dbus_name = func.__name__

1238

1243

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

1239

1244

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

1240

func._dbus_get_args_options = {"byte_arrays": byte_arrays}

1245

func._dbus_get_args_options = {'byte_arrays': byte_arrays}

1241

1246

return func

1242

1247

1243

1248

return decorator

1332

1337

1333

1338

@dbus.service.method(dbus.INTROSPECTABLE_IFACE,

1334

1339

out_signature="s",

1335

path_keyword="object_path",

1336

connection_keyword="connection")

1340

path_keyword='object_path',

1341

connection_keyword='connection')

1337

1342

def Introspect(self, object_path, connection):

1338

1343

"""Overloading of standard D-Bus method.

1339

1344

1388

1393

document.unlink()

1389

1394

except (AttributeError, xml.dom.DOMException,

1390

1395

xml.parsers.expat.ExpatError) as error:

1391

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

1392

exc_info=error)

1396

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

1397

exc_info=error)

1393

1398

return xmlstring

1394

1399

1395

1400

1492

1497

1493

1498

@dbus.service.method(dbus.INTROSPECTABLE_IFACE,

1494

1499

out_signature="s",

1495

path_keyword="object_path",

1496

connection_keyword="connection")

1500

path_keyword='object_path',

1501

connection_keyword='connection')

1497

1502

def Introspect(self, object_path, connection):

1498

1503

"""Overloading of standard D-Bus method.

1499

1504

1555

1560

document.unlink()

1556

1561

except (AttributeError, xml.dom.DOMException,

1557

1562

xml.parsers.expat.ExpatError) as error:

1558

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

1559

exc_info=error)

1563

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

1564

exc_info=error)

1560

1565

return xmlstring

1561

1566

1562

1567

1594

1599

1595

1600

@dbus.service.method(dbus.INTROSPECTABLE_IFACE,

1596

1601

out_signature="s",

1597

path_keyword="object_path",

1598

connection_keyword="connection")

1602

path_keyword='object_path',

1603

connection_keyword='connection')

1599

1604

def Introspect(self, object_path, connection):

1600

1605

"""Overloading of standard D-Bus method.

1601

1606

1626

1631

document.unlink()

1627

1632

except (AttributeError, xml.dom.DOMException,

1628

1633

xml.parsers.expat.ExpatError) as error:

1629

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

1630

exc_info=error)

1634

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

1635

exc_info=error)

1631

1636

return xmlstring

1632

1637

1633

1638

2267

2272

class ProxyClient:

2268

2273

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

2269

2274

self._pipe = child_pipe

2270

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

2275

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

2271

2276

if not self._pipe.recv():

2272

2277

raise KeyError(key_id or fpr)

2273

2278

2274

2279

def __getattribute__(self, name):

2275

if name == "_pipe":

2280

if name == '_pipe':

2276

2281

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

2277

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

2282

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

2278

2283

data = self._pipe.recv()

2279

if data[0] == "data":

2284

if data[0] == 'data':

2280

2285

return data[1]

2281

if data[0] == "function":

2286

if data[0] == 'function':

2282

2287

2283

2288

def func(*args, **kwargs):

2284

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

2289

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

2285

2290

return self._pipe.recv()[1]

2286

2291

2287

2292

return func

2288

2293

2289

2294

def __setattr__(self, name, value):

2290

if name == "_pipe":

2295

if name == '_pipe':

2291

2296

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

2292

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

2297

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

2293

2298

2294

2299

2295

2300

class ClientHandler(socketserver.BaseRequestHandler, object):

2300

2305

2301

2306

def handle(self):

2302

2307

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

2303

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

2304

str(self.client_address))

2305

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())

2306

2312

2307

2313

session = gnutls.ClientSession(self.request)

2308

2314

2309

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

2315

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

2310

2316

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

2311

2317

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

2312

2318

# "+DHE-DSS"))

2320

2326

# Start communication using the Mandos protocol

2321

2327

# Get protocol number

2322

2328

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

2323

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

2329

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

2324

2330

try:

2325

2331

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

2326

2332

raise RuntimeError(line)

2327

2333

except (ValueError, IndexError, RuntimeError) as error:

2328

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

2334

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

2329

2335

return

2330

2336

2331

2337

# Start GnuTLS connection

2332

2338

try:

2333

2339

session.handshake()

2334

2340

except gnutls.Error as error:

2335

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

2341

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

2336

2342

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

2337

2343

# established. Just abandon the request.

2338

2344

return

2339

log.debug("Handshake succeeded")

2345

logger.debug("Handshake succeeded")

2340

2346

2341

2347

approval_required = False

2342

2348

try:

2346

2352

key_id = self.key_id(

2347

2353

self.peer_certificate(session))

2348

2354

except (TypeError, gnutls.Error) as error:

2349

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

2355

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

2350

2356

return

2351

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

2352

key_id.decode("utf-8",

2353

errors="replace"))

2357

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

2358

key_id.decode("utf-8",

2359

errors="replace"))

2354

2360

2355

2361

else:

2356

2362

key_id = b""

2358

2364

fpr = self.fingerprint(

2359

2365

self.peer_certificate(session))

2360

2366

except (TypeError, gnutls.Error) as error:

2361

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

2367

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

2362

2368

return

2363

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

2369

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

2364

2370

2365

2371

try:

2366

2372

client = ProxyClient(child_pipe, key_id, fpr,

2375

2381

2376

2382

while True:

2377

2383

if not client.enabled:

2378

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

2384

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

2385

client.name)

2379

2386

if self.server.use_dbus:

2380

2387

# Emit D-Bus signal

2381

2388

client.Rejected("Disabled")

2385

2392

# We are approved or approval is disabled

2386

2393

break

2387

2394

elif client.approved is None:

2388

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

2389

client.name)

2395

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

2396

client.name)

2390

2397

if self.server.use_dbus:

2391

2398

# Emit D-Bus signal

2392

2399

client.NeedApproval(

2393

2400

client.approval_delay.total_seconds()

2394

2401

* 1000, client.approved_by_default)

2395

2402

else:

2396

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

2397

client.name)

2403

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

2404

client.name)

2398

2405

if self.server.use_dbus:

2399

2406

# Emit D-Bus signal

2400

2407

client.Rejected("Denied")

2408

2415

time2 = datetime.datetime.now()

2409

2416

if (time2 - time) >= delay:

2410

2417

if not client.approved_by_default:

2411

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

2412

" waiting for approval",

2413

client.name)

2418

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

2419

" waiting for approval",

2420

client.name)

2414

2421

if self.server.use_dbus:

2415

2422

# Emit D-Bus signal

2416

2423

client.Rejected("Approval timed out")

2423

2430

try:

2424

2431

session.send(client.secret)

2425

2432

except gnutls.Error as error:

2426

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

2433

logger.warning("gnutls send failed",

2434

exc_info=error)

2427

2435

return

2428

2436

2429

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

2437

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

2430

2438

# bump the timeout using extended_timeout

2431

2439

client.bump_timeout(client.extended_timeout)

2432

2440

if self.server.use_dbus:

2439

2447

try:

2440

2448

session.bye()

2441

2449

except gnutls.Error as error:

2442

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

2450

logger.warning("GnuTLS bye failed",

2451

exc_info=error)

2443

2452

2444

2453

@staticmethod

2445

2454

def peer_certificate(session):

2455

2464

valid_cert_types = frozenset((gnutls.CRT_OPENPGP,))

2456

2465

# If not a valid certificate type...

2457

2466

if cert_type not in valid_cert_types:

2458

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

2459

valid_cert_types)

2467

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

2468

valid_cert_types)

2460

2469

# ...return invalid data

2461

2470

return b""

2462

2471

list_size = ctypes.c_uint(1)

2581

2590

2582

2591

class IPv6_TCPServer(MultiprocessingMixInWithPipe,

2583

2592

socketserver.TCPServer):

2584

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

2593

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

2585

2594

2586

2595

Attributes:

2587

2596

enabled: Boolean; whether this server is activated yet

2638

2647

if SO_BINDTODEVICE is None:

2639

2648

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

2640

2649

# common enough.

2641

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

2650

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

2642

2651

SO_BINDTODEVICE = 25

2643

2652

try:

2644

2653

self.socket.setsockopt(

2646

2655

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

2647

2656

except socket.error as error:

2648

2657

if error.errno == errno.EPERM:

2649

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

2650

self.interface)

2658

logger.error("No permission to bind to"

2659

" interface %s", self.interface)

2651

2660

elif error.errno == errno.ENOPROTOOPT:

2652

log.error("SO_BINDTODEVICE not available; cannot"

2653

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

2661

logger.error("SO_BINDTODEVICE not available;"

2662

" cannot bind to interface %s",

2663

self.interface)

2654

2664

elif error.errno == errno.ENODEV:

2655

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

2656

" bind", self.interface)

2665

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

2666

" cannot bind", self.interface)

2657

2667

else:

2658

2668

raise

2659

2669

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

2738

2748

request = parent_pipe.recv()

2739

2749

command = request[0]

2740

2750

2741

if command == "init":

2751

if command == 'init':

2742

2752

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

2743

2753

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

2744

2754

address = request[3]

2754

2764

client = c

2755

2765

break

2756

2766

else:

2757

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

2758

" %s", key_id or fpr, address)

2767

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

2768

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

2759

2769

if self.use_dbus:

2760

2770

# Emit D-Bus signal

2761

2771

mandos_dbus_service.ClientNotFound(key_id or fpr,

2774

2784

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

2775

2785

# same fileno

2776

2786

return False

2777

if command == "funcall":

2787

if command == 'funcall':

2778

2788

funcname = request[1]

2779

2789

args = request[2]

2780

2790

kwargs = request[3]

2781

2791

2782

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

2792

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

2783

2793

funcname)(*args,

2784

2794

**kwargs)))

2785

2795

2786

if command == "getattr":

2796

if command == 'getattr':

2787

2797

attrname = request[1]

2788

2798

if isinstance(client_object.__getattribute__(attrname),

2789

2799

collections.abc.Callable):

2790

parent_pipe.send(("function", ))

2800

parent_pipe.send(('function', ))

2791

2801

else:

2792

2802

parent_pipe.send((

2793

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

2803

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

2794

2804

2795

if command == "setattr":

2805

if command == 'setattr':

2796

2806

attrname = request[1]

2797

2807

value = request[2]

2798

2808

setattr(client_object, attrname, value)

2904

2914

def string_to_delta(interval):

2905

2915

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

2906

2916

2907

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

2908

True

2909

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

2910

True

2911

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

2912

True

2913

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

2914

True

2915

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

2916

True

2917

>>> 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)

2918

2928

True

2919

2929

"""

2920

2930

3124

3134

3125

3135

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

3126

3136

syslogger.setFormatter(

3127

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

3128

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

3137

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

3138

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

3129

3139

server_settings["servicename"])))

3130

3140

3131

3141

# Parse config file with clients

3155

3165

try:

3156

3166

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

3157

3167

except IOError as e:

3158

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

3159

exc_info=e)

3168

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

3169

exc_info=e)

3160

3170

3161

3171

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

3162

3172

("mandos", "mandos"),

3173

3183

try:

3174

3184

os.setgid(gid)

3175

3185

os.setuid(uid)

3176

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

3186

if debug:

3187

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

3188

gid))

3177

3189

except OSError as error:

3178

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

3179

os.strerror(error.errno))

3190

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

3191

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

3180

3192

if error.errno != errno.EPERM:

3181

3193

raise

3182

3194

3189

3201

3190

3202

@gnutls.log_func

3191

3203

def debug_gnutls(level, string):

3192

log.debug("GnuTLS: %s",

3193

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

3204

logger.debug("GnuTLS: %s",

3205

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

3206

errors="replace"))

3194

3207

3195

3208

gnutls.global_set_log_function(debug_gnutls)

3196

3209

3225

3238

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

3226

3239

do_not_queue=True)

3227

3240

except dbus.exceptions.DBusException as e:

3228

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

3241

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

3229

3242

use_dbus = False

3230

3243

server_settings["use_dbus"] = False

3231

3244

tcp_server.use_dbus = False

3316

3329

os.remove(stored_state_path)

3317

3330

except IOError as e:

3318

3331

if e.errno == errno.ENOENT:

3319

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

3320

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

3332

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

3333

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

3321

3334

else:

3322

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

3323

exc_info=e)

3335

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

3336

exc_info=e)

3324

3337

raise

3325

3338

except EOFError as e:

3326

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

3327

exc_info=e)

3339

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

3340

"EOFError:",

3341

exc_info=e)

3328

3342

3329

3343

with PGPEngine() as pgp:

3330

3344

for client_name, client in clients_data.items():

3357

3371

if client["enabled"]:

3358

3372

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

3359

3373

if not client["last_checked_ok"]:

3360

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

3361

" never performed a successful"

3362

" checker", client_name)

3374

logger.warning(

3375

"disabling client {} - Client never "

3376

"performed a successful checker".format(

3377

client_name))

3363

3378

client["enabled"] = False

3364

3379

elif client["last_checker_status"] != 0:

3365

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

3366

" last checker failed with error"

3367

" code %s", client_name,

3368

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"]))

3369

3386

client["enabled"] = False

3370

3387

else:

3371

3388

client["expires"] = (

3372

3389

datetime.datetime.utcnow()

3373

3390

+ client["timeout"])

3374

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

3375

" enabled", client_name)

3391

logger.debug("Last checker succeeded,"

3392

" keeping {} enabled".format(

3393

client_name))

3376

3394

try:

3377

3395

client["secret"] = pgp.decrypt(

3378

3396

client["encrypted_secret"],

3379

3397

client_settings[client_name]["secret"])

3380

3398

except PGPError:

3381

3399

# If decryption fails, we use secret from new settings

3382

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

3383

client_name)

3400

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

3401

client_name))

3384

3402

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

3385

3403

["secret"])

3386

3404

3400

3418

server_settings=server_settings)

3401

3419

3402

3420

if not tcp_server.clients:

3403

log.warning("No clients defined")

3421

logger.warning("No clients defined")

3404

3422

3405

3423

if not foreground:

3406

3424

if pidfile is not None:

3409

3427

with pidfile:

3410

3428

print(pid, file=pidfile)

3411

3429

except IOError:

3412

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

3413

pidfilename, pid)

3430

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

3431

pidfilename, pid)

3414

3432

del pidfile

3415

3433

del pidfilename

3416

3434

3566

3584

3567

3585

try:

3568

3586

with tempfile.NamedTemporaryFile(

3569

mode="wb",

3587

mode='wb',

3570

3588

suffix=".pickle",

3571

prefix="clients-",

3589

prefix='clients-',

3572

3590

dir=os.path.dirname(stored_state_path),

3573

3591

delete=False) as stored_state:

3574

3592

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

3582

3600

except NameError:

3583

3601

pass

3584

3602

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

3585

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

3586

os.strerror(e.errno))

3603

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

3604

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

3587

3605

else:

3588

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

3589

exc_info=e)

3606

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

3607

exc_info=e)

3590

3608

raise

3591

3609

3592

3610

# Delete all clients, and settings from config

3618

3636

if zeroconf:

3619

3637

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

3620

3638

if use_ipv6:

3621

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

3622

" 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())

3623

3642

else: # IPv4

3624

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

3625

*tcp_server.socket.getsockname())

3643

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

3644

*tcp_server.socket.getsockname())

3626

3645

3627

3646

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

3628

3647

3632

3651

try:

3633

3652

service.activate()

3634

3653

except dbus.exceptions.DBusException as error:

3635

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

3654

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

3636

3655

cleanup()

3637

3656

sys.exit(1)

3638

3657

# End of Avahi example code

3643

3662

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

3644

3663

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

3645

3664

3646

log.debug("Starting main loop")

3665

logger.debug("Starting main loop")

3647

3666

main_loop.run()

3648

3667

except AvahiError as error:

3649

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

3668

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

3650

3669

cleanup()

3651

3670

sys.exit(1)

3652

3671

except KeyboardInterrupt:

3653

3672

if debug:

3654

3673

print("", file=sys.stderr)

3655

log.debug("Server received KeyboardInterrupt")

3656

log.debug("Server exiting")

3674

logger.debug("Server received KeyboardInterrupt")

3675

logger.debug("Server exiting")

3657

3676

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

3658

3677

cleanup()

3659

3678

3660

3679

3661

def parse_test_args():

3662

# type: () -> argparse.Namespace

3680

def should_only_run_tests():

3663

3681

parser = argparse.ArgumentParser(add_help=False)

3664

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

3665

parser.add_argument("--prefix", )

3682

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

3666

3683

args, unknown_args = parser.parse_known_args()

3667

if args.check:

3668

# Remove test options from sys.argv

3684

run_tests = args.check

3685

if run_tests:

3686

# Remove --check argument from sys.argv

3669

3687

sys.argv[1:] = unknown_args

3670

return args

3688

return run_tests

3671

3689

3672

3690

# Add all tests from doctest strings

3673

3691

def load_tests(loader, tests, none):

3675

3693

tests.addTests(doctest.DocTestSuite())

3676

3694

return tests

3677

3695

3678

if __name__ == "__main__":

3679

options = parse_test_args()

3696

if __name__ == '__main__':

3680

3697

try:

3681

if options.check:

3682

extra_test_prefix = options.prefix

3683

if extra_test_prefix is not None:

3684

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

3685

.result.wasSuccessful()):

3686

sys.exit(1)

3687

class ExtraTestLoader(unittest.TestLoader):

3688

testMethodPrefix = extra_test_prefix

3689

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

3690

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

3691

else:

3692

unittest.main(argv=[""])

3698

if should_only_run_tests():

3699

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

3700

unittest.main()

3693

3701

else:

3694

3702

main()

3695

3703

finally:

3696

3704

logging.shutdown()

3697

3698

# Local Variables:

3699

# run-tests:

3700

# (lambda (&optional extra)

3701

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

3702

# extra))

3703

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

3704

# (funcall remove-test-window)

3705

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

3706

# run-tests-in-test-buffer:

3707

# (lambda (dir &optional extra)

3708

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

3709

# (setq buffer-read-only nil

3710

# default-directory dir)

3711

# (erase-buffer)

3712

# (compilation-mode))

3713

# (let ((process-result

3714

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

3715

# (process-file-shell-command

3716

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

3717

# (and (numberp process-result)

3718

# (= process-result 0))))

3719

# get-command-line:

3720

# (lambda (&optional extra)

3721

# (let ((quoted-script

3722

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

3723

# (format

3724

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

3725

# quoted-script)))

3726

# get-script-name:

3727

# (lambda ()

3728

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

3729

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

3730

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

3731

# (buffer-file-name))))

3732

# remove-test-window:

3733

# (lambda ()

3734

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

3735

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

3736

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

3737

# (lambda ()

3738

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

3739

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

3740

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

3741

# (display-buffer-overriding-action

3742

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

3743

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

3744

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

3745

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

3746

# eval:

3747

# (progn

3748

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

3749

# (funcall run-tests t)))

3750

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

3751

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

3752

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

3753

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

3754

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

3755

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

3756

# End: