/mandos/release : revision 237.7.793

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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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39

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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):

395

"""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(

402

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)

406

if remove:

407

self.remove()

408

try:

410

except dbus.exceptions.DBusException as error:

411

if (error.get_dbus_name()

412

== "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)

415

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)

419

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,

443

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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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:

458

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))

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

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str(error))

463

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

464

465

def cleanup(self):

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476

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:

488

log.error(bad_states[state])

488

logger.error(bad_states[state])

489

else:

490

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

490

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

491

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.")

498

logger.info("Local Zeroconf service name"

499

" collision.")

499

500

return self.rename(remove=False)

500

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

527

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

527

528

**kwargs)

528

529

syslogger.setFormatter(logging.Formatter(

529

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

530

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

530

531

.format(self.name)))

531

532

return ret

532

533

573

574

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_ = []

675

676

# Error handling functions

676

677

def _error_code(result):

677

678

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

678

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

679

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

679

680

if result >= gnutls.E_SUCCESS:

680

681

return result

681

682

if result == gnutls.E_NO_CERTIFICATE_FOUND:

685

686

def _retry_on_error(result, func, arguments,

686

687

_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):

691

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

881

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

1009

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

1045

1046

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

1046

1047

# Already enabled

1047

1048

return

1049

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

1048

1050

self.enabled = True

1049

1051

self.last_enabled = datetime.datetime.utcnow()

1050

1052

self.init_checker()

1055

1057

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

1056

1058

return False

1057

1059

if not quiet:

1058

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

1060

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

1059

1061

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

1060

1062

GLib.source_remove(self.disable_initiator_tag)

1061

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: