/mandos/release : revision 237.7.801

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#!/usr/bin/python

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

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#!/usr/bin/python3 -bI

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# -*- 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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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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import dbus

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import dbus.service

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import gi

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from gi.repository import GLib

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from dbus.mainloop.glib import DBusGMainLoop

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import ctypes

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import xml.dom.minidom

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import inspect

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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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# Add collections.abc.Callable if it does not exist

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try:

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collections.abc.Callable

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except AttributeError:

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class abc:

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Callable = collections.Callable

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collections.abc = abc

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del abc

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# Add shlex.quote if it does not exist

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try:

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shlex.quote

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except AttributeError:

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shlex.quote = re.escape

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# Show warnings by default

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if not sys.warnoptions:

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import warnings

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warnings.simplefilter("default")

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# Try to find the value of SO_BINDTODEVICE:

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try:

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# This is where SO_BINDTODEVICE is in Python 3.3 (or 3.4?) and

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# No value found

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SO_BINDTODEVICE = None

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if sys.version_info.major == 2:

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str = unicode

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if sys.version_info < (3, 2):

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configparser.Configparser = configparser.SafeConfigParser

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version = "1.8.3"

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version = "1.8.14"

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stored_state_file = "clients.pickle"

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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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try:

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facility=logging.handlers.SysLogHandler.LOG_DAEMON,

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address="/dev/log"))

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syslogger.setFormatter(logging.Formatter

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

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' %(message)s'))

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("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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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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pass

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class PGPEngine(object):

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class PGPEngine:

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"""A simple class for OpenPGP symmetric encryption & decryption"""

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def __init__(self):

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output = subprocess.check_output(["gpgconf"])

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for line in output.splitlines():

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name, text, path = line.split(b":")

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if name == "gpg":

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if name == b"gpg":

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self.gpg = path

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break

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except OSError as e:

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if e.errno != errno.ENOENT:

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raise

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self.gnupgargs = ['--batch',

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'--homedir', self.tempdir,

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'--force-mdc',

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'--quiet']

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self.gnupgargs = ["--batch",

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"--homedir", self.tempdir,

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"--force-mdc",

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"--quiet"]

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# Only GPG version 1 has the --no-use-agent option.

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

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

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

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def __enter__(self):

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dir=self.tempdir) as passfile:

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passfile.write(passphrase)

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passfile.flush()

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proc = subprocess.Popen([self.gpg, '--symmetric',

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'--passphrase-file',

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proc = subprocess.Popen([self.gpg, "--symmetric",

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"--passphrase-file",

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passfile.name]

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+ self.gnupgargs,

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stdin=subprocess.PIPE,

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dir=self.tempdir) as passfile:

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passfile.write(passphrase)

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passfile.flush()

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proc = subprocess.Popen([self.gpg, '--decrypt',

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'--passphrase-file',

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proc = subprocess.Popen([self.gpg, "--decrypt",

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"--passphrase-file",

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passfile.name]

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+ self.gnupgargs,

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stdin=subprocess.PIPE,

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# Pretend that we have an Avahi module

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class Avahi(object):

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"""This isn't so much a class as it is a module-like namespace.

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It is instantiated once, and simulates having an Avahi module."""

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class avahi:

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"""This isn't so much a class as it is a module-like namespace."""

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IF_UNSPEC = -1 # avahi-common/address.h

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PROTO_UNSPEC = -1 # avahi-common/address.h

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PROTO_INET = 0 # avahi-common/address.h

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DBUS_INTERFACE_SERVER = DBUS_NAME + ".Server"

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DBUS_PATH_SERVER = "/"

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def string_array_to_txt_array(self, t):

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@staticmethod

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def string_array_to_txt_array(t):

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return dbus.Array((dbus.ByteArray(s.encode("utf-8"))

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for s in t), signature="ay")

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ENTRY_GROUP_ESTABLISHED = 2 # avahi-common/defs.h

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SERVER_RUNNING = 2 # avahi-common/defs.h

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SERVER_COLLISION = 3 # avahi-common/defs.h

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SERVER_FAILURE = 4 # avahi-common/defs.h

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avahi = Avahi()

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class AvahiError(Exception):

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pass

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class AvahiService(object):

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class AvahiService:

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"""An Avahi (Zeroconf) service.

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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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avahi.DBUS_INTERFACE_ENTRY_GROUP)

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self.entry_group_state_changed_match = (

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self.group.connect_to_signal(

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'StateChanged', self.entry_group_state_changed))

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"StateChanged", self.entry_group_state_changed))

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

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self.name, self.type)

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self.group.AddService(

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class AvahiServiceToSyslog(AvahiService):

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

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

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

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

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**kwargs)

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syslogger.setFormatter(logging.Formatter(

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

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

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.format(self.name)))

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return ret

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# Pretend that we have a GnuTLS module

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class GnuTLS(object):

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"""This isn't so much a class as it is a module-like namespace.

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It is instantiated once, and simulates having a GnuTLS module."""

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class gnutls:

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"""This isn't so much a class as it is a module-like namespace."""

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library = ctypes.util.find_library("gnutls")

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if library is None:

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library = ctypes.util.find_library("gnutls-deb0")

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_library = ctypes.cdll.LoadLibrary(library)

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del library

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_need_version = b"3.3.0"

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_tls_rawpk_version = b"3.6.6"

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def __init__(self):

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# Need to use "self" here, since this method is called before

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# the assignment to the "gnutls" global variable happens.

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if self.check_version(self._need_version) is None:

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raise self.Error("Needs GnuTLS {} or later"

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.format(self._need_version))

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# Unless otherwise indicated, the constants and types below are

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# all from the gnutls/gnutls.h C header file.

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OPENPGP_FMT_RAW = 0 # gnutls/openpgp.h

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# Types

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class session_int(ctypes.Structure):

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class _session_int(ctypes.Structure):

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_fields_ = []

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session_t = ctypes.POINTER(session_int)

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session_t = ctypes.POINTER(_session_int)

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class certificate_credentials_st(ctypes.Structure):

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_fields_ = []

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certificate_type_t = ctypes.c_int

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class datum_t(ctypes.Structure):

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

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('size', ctypes.c_uint)]

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

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("size", ctypes.c_uint)]

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class openpgp_crt_int(ctypes.Structure):

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class _openpgp_crt_int(ctypes.Structure):

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_fields_ = []

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openpgp_crt_t = ctypes.POINTER(openpgp_crt_int)

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openpgp_crt_t = ctypes.POINTER(_openpgp_crt_int)

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openpgp_crt_fmt_t = ctypes.c_int # gnutls/openpgp.h

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

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credentials_type_t = ctypes.c_int

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# Exceptions

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class Error(Exception):

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# We need to use the class name "GnuTLS" here, since this

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# exception might be raised from within GnuTLS.__init__,

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# which is called before the assignment to the "gnutls"

575

# global variable has happened.

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def __init__(self, message=None, code=None, args=()):

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# Default usage is by a message string, but if a return

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# code is passed, convert it to a string with

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# gnutls.strerror()

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self.code = code

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if message is None and code is not None:

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message = GnuTLS.strerror(code)

583

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

597

message = gnutls.strerror(code).decode(

598

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

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

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600

message, *args)

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586

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class CertificateSecurityError(Error):

587

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pass

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604

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class PointerTo:

606

def __init__(self, cls):

607

self.cls = cls

608

609

def from_param(self, obj):

610

if not isinstance(obj, self.cls):

611

raise TypeError("Not of type {}: {!r}"

612

.format(self.cls.__name__, obj))

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return ctypes.byref(obj.from_param(obj))

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class CastToVoidPointer:

616

def __init__(self, cls):

617

self.cls = cls

618

619

def from_param(self, obj):

620

if not isinstance(obj, self.cls):

621

raise TypeError("Not of type {}: {!r}"

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.format(self.cls.__name__, obj))

623

return ctypes.cast(obj.from_param(obj), ctypes.c_void_p)

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class With_from_param:

626

@classmethod

627

def from_param(cls, obj):

628

return obj._as_parameter_

629

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630

# Classes

590

class Credentials(object):

631

class Credentials(With_from_param):

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632

def __init__(self):

592

self._c_object = gnutls.certificate_credentials_t()

593

gnutls.certificate_allocate_credentials(

594

ctypes.byref(self._c_object))

633

self._as_parameter_ = gnutls.certificate_credentials_t()

634

gnutls.certificate_allocate_credentials(self)

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635

self.type = gnutls.CRD_CERTIFICATE

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636

597

637

def __del__(self):

598

gnutls.certificate_free_credentials(self._c_object)

638

gnutls.certificate_free_credentials(self)

599

639

600

class ClientSession(object):

640

class ClientSession(With_from_param):

601

641

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

602

self._c_object = gnutls.session_t()

642

self._as_parameter_ = gnutls.session_t()

603

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gnutls_flags = gnutls.CLIENT

604

if gnutls.check_version("3.5.6"):

644

if gnutls.check_version(b"3.5.6"):

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gnutls_flags |= gnutls.NO_TICKETS

606

646

if gnutls.has_rawpk:

607

647

gnutls_flags |= gnutls.ENABLE_RAWPK

608

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

648

gnutls.init(self, gnutls_flags)

609

649

del gnutls_flags

610

gnutls.set_default_priority(self._c_object)

611

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

612

gnutls.handshake_set_private_extensions(self._c_object,

613

True)

650

gnutls.set_default_priority(self)

651

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

652

gnutls.handshake_set_private_extensions(self, True)

614

653

self.socket = socket

615

654

if credentials is None:

616

655

credentials = gnutls.Credentials()

617

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

618

ctypes.cast(credentials._c_object,

619

ctypes.c_void_p))

656

gnutls.credentials_set(self, credentials.type,

657

credentials)

620

658

self.credentials = credentials

621

659

622

660

def __del__(self):

623

gnutls.deinit(self._c_object)

661

gnutls.deinit(self)

624

662

625

663

def handshake(self):

626

return gnutls.handshake(self._c_object)

664

return gnutls.handshake(self)

627

665

628

666

def send(self, data):

629

667

data = bytes(data)

630

668

data_len = len(data)

631

669

while data_len > 0:

632

data_len -= gnutls.record_send(self._c_object,

633

data[-data_len:],

670

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

634

671

data_len)

635

672

636

673

def bye(self):

637

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

674

return gnutls.bye(self, gnutls.SHUT_RDWR)

638

675

639

676

# Error handling functions

640

677

def _error_code(result):

641

678

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

642

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

643

if result >= 0:

679

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

680

if result >= gnutls.E_SUCCESS:

644

681

return result

645

682

if result == gnutls.E_NO_CERTIFICATE_FOUND:

646

683

raise gnutls.CertificateSecurityError(code=result)

647

684

raise gnutls.Error(code=result)

648

685

649

def _retry_on_error(result, func, arguments):

686

def _retry_on_error(result, func, arguments,

687

_error_code=_error_code):

650

688

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

651

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

652

while result < 0:

689

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

690

while result < gnutls.E_SUCCESS:

653

691

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

654

692

return _error_code(result)

655

693

result = func(*arguments)

660

698

661

699

# Functions

662

700

priority_set_direct = _library.gnutls_priority_set_direct

663

priority_set_direct.argtypes = [session_t, ctypes.c_char_p,

701

priority_set_direct.argtypes = [ClientSession, ctypes.c_char_p,

664

702

ctypes.POINTER(ctypes.c_char_p)]

665

703

priority_set_direct.restype = _error_code

666

704

667

705

init = _library.gnutls_init

668

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

706

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

669

707

init.restype = _error_code

670

708

671

709

set_default_priority = _library.gnutls_set_default_priority

672

set_default_priority.argtypes = [session_t]

710

set_default_priority.argtypes = [ClientSession]

673

711

set_default_priority.restype = _error_code

674

712

675

713

record_send = _library.gnutls_record_send

676

record_send.argtypes = [session_t, ctypes.c_void_p,

714

record_send.argtypes = [ClientSession, ctypes.c_void_p,

677

715

ctypes.c_size_t]

678

716

record_send.restype = ctypes.c_ssize_t

679

717

record_send.errcheck = _retry_on_error

681

719

certificate_allocate_credentials = (

682

720

_library.gnutls_certificate_allocate_credentials)

683

721

certificate_allocate_credentials.argtypes = [

684

ctypes.POINTER(certificate_credentials_t)]

722

PointerTo(Credentials)]

685

723

certificate_allocate_credentials.restype = _error_code

686

724

687

725

certificate_free_credentials = (

688

726

_library.gnutls_certificate_free_credentials)

689

certificate_free_credentials.argtypes = [

690

certificate_credentials_t]

727

certificate_free_credentials.argtypes = [Credentials]

691

728

certificate_free_credentials.restype = None

692

729

693

730

handshake_set_private_extensions = (

694

731

_library.gnutls_handshake_set_private_extensions)

695

handshake_set_private_extensions.argtypes = [session_t,

732

handshake_set_private_extensions.argtypes = [ClientSession,

696

733

ctypes.c_int]

697

734

handshake_set_private_extensions.restype = None

698

735

699

736

credentials_set = _library.gnutls_credentials_set

700

credentials_set.argtypes = [session_t, credentials_type_t,

701

ctypes.c_void_p]

737

credentials_set.argtypes = [ClientSession, credentials_type_t,

738

CastToVoidPointer(Credentials)]

702

739

credentials_set.restype = _error_code

703

740

704

741

strerror = _library.gnutls_strerror

706

743

strerror.restype = ctypes.c_char_p

707

744

708

745

certificate_type_get = _library.gnutls_certificate_type_get

709

certificate_type_get.argtypes = [session_t]

746

certificate_type_get.argtypes = [ClientSession]

710

747

certificate_type_get.restype = _error_code

711

748

712

749

certificate_get_peers = _library.gnutls_certificate_get_peers

713

certificate_get_peers.argtypes = [session_t,

750

certificate_get_peers.argtypes = [ClientSession,

714

751

ctypes.POINTER(ctypes.c_uint)]

715

752

certificate_get_peers.restype = ctypes.POINTER(datum_t)

716

753

723

760

global_set_log_function.restype = None

724

761

725

762

deinit = _library.gnutls_deinit

726

deinit.argtypes = [session_t]

763

deinit.argtypes = [ClientSession]

727

764

deinit.restype = None

728

765

729

766

handshake = _library.gnutls_handshake

730

handshake.argtypes = [session_t]

731

handshake.restype = _error_code

767

handshake.argtypes = [ClientSession]

768

handshake.restype = ctypes.c_int

732

769

handshake.errcheck = _retry_on_error

733

770

734

771

transport_set_ptr = _library.gnutls_transport_set_ptr

735

transport_set_ptr.argtypes = [session_t, transport_ptr_t]

772

transport_set_ptr.argtypes = [ClientSession, transport_ptr_t]

736

773

transport_set_ptr.restype = None

737

774

738

775

bye = _library.gnutls_bye

739

bye.argtypes = [session_t, close_request_t]

740

bye.restype = _error_code

776

bye.argtypes = [ClientSession, close_request_t]

777

bye.restype = ctypes.c_int

741

778

bye.errcheck = _retry_on_error

742

779

743

780

check_version = _library.gnutls_check_version

744

781

check_version.argtypes = [ctypes.c_char_p]

745

782

check_version.restype = ctypes.c_char_p

746

783

784

_need_version = b"3.3.0"

785

if check_version(_need_version) is None:

786

raise self.Error("Needs GnuTLS {} or later"

787

.format(_need_version))

788

789

_tls_rawpk_version = b"3.6.6"

747

790

has_rawpk = bool(check_version(_tls_rawpk_version))

748

791

749

792

if has_rawpk:

754

797

755

798

x509_crt_fmt_t = ctypes.c_int

756

799

757

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

800

# All the function declarations below are from

801

# gnutls/abstract.h

758

802

pubkey_init = _library.gnutls_pubkey_init

759

803

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

760

804

pubkey_init.restype = _error_code

774

818

pubkey_deinit.argtypes = [pubkey_t]

775

819

pubkey_deinit.restype = None

776

820

else:

777

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

821

# All the function declarations below are from

822

# gnutls/openpgp.h

778

823

779

824

openpgp_crt_init = _library.gnutls_openpgp_crt_init

780

825

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

786

831

openpgp_crt_fmt_t]

787

832

openpgp_crt_import.restype = _error_code

788

833

789

openpgp_crt_verify_self = _library.gnutls_openpgp_crt_verify_self

790

openpgp_crt_verify_self.argtypes = [openpgp_crt_t, ctypes.c_uint,

791

ctypes.POINTER(ctypes.c_uint)]

834

openpgp_crt_verify_self = \

835

_library.gnutls_openpgp_crt_verify_self

836

openpgp_crt_verify_self.argtypes = [

837

openpgp_crt_t,

838

ctypes.c_uint,

839

ctypes.POINTER(ctypes.c_uint),

840

]

792

841

openpgp_crt_verify_self.restype = _error_code

793

842

794

843

openpgp_crt_deinit = _library.gnutls_openpgp_crt_deinit

803

852

ctypes.c_size_t)]

804

853

openpgp_crt_get_fingerprint.restype = _error_code

805

854

806

if check_version("3.6.4"):

855

if check_version(b"3.6.4"):

807

856

certificate_type_get2 = _library.gnutls_certificate_type_get2

808

certificate_type_get2.argtypes = [session_t, ctypes.c_int]

857

certificate_type_get2.argtypes = [ClientSession, ctypes.c_int]

809

858

certificate_type_get2.restype = _error_code

810

859

811

860

# Remove non-public functions

812

861

del _error_code, _retry_on_error

813

# Create the global "gnutls" object, simulating a module

814

gnutls = GnuTLS()

815

862

816

863

817

864

def call_pipe(connection, # : multiprocessing.Connection

825

872

connection.close()

826

873

827

874

828

class Client(object):

875

class Client:

829

876

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

830

877

831

878

Attributes:

832

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

879

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

833

880

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

834

881

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

835

checker: subprocess.Popen(); a running checker process used

836

to see if the client lives.

837

'None' if no process is running.

882

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

883

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

884

running.

838

885

checker_callback_tag: a GLib event source tag, or None

839

886

checker_command: string; External command which is run to check

840

887

if client lives. %() expansions are done at

1034

1081

if self.checker_initiator_tag is not None:

1035

1082

GLib.source_remove(self.checker_initiator_tag)

1036

1083

self.checker_initiator_tag = GLib.timeout_add(

1037

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

1084

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

1085

+ 1)),

1038

1086

self.start_checker)

1039

1087

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

1040

1088

if self.disable_initiator_tag is not None:

1047

1095

def checker_callback(self, source, condition, connection,

1048

1096

command):

1049

1097

"""The checker has completed, so take appropriate actions."""

1050

self.checker_callback_tag = None

1051

self.checker = None

1052

1098

# Read return code from connection (see call_pipe)

1053

1099

returncode = connection.recv()

1054

1100

connection.close()

1101

if self.checker is not None:

1102

self.checker.join()

1103

self.checker_callback_tag = None

1104

self.checker = None

1055

1105

1056

1106

if returncode >= 0:

1057

1107

self.last_checker_status = returncode

1113

1163

if self.checker is None:

1114

1164

# Escape attributes for the shell

1115

1165

escaped_attrs = {

1116

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

1166

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

1117

1167

for attr in self.runtime_expansions}

1118

1168

try:

1119

1169

command = self.checker_command % escaped_attrs

1146

1196

kwargs=popen_args)

1147

1197

self.checker.start()

1148

1198

self.checker_callback_tag = GLib.io_add_watch(

1149

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

1199

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

1200

GLib.PRIORITY_DEFAULT, GLib.IO_IN,

1150

1201

self.checker_callback, pipe[0], command)

1151

1202

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

1152

1203

return True

1191

1242

func._dbus_name = func.__name__

1192

1243

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

1193

1244

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

1194

func._dbus_get_args_options = {'byte_arrays': byte_arrays}

1245

func._dbus_get_args_options = {"byte_arrays": byte_arrays}

1195

1246

return func

1196

1247

1197

1248

return decorator

1286

1337

1287

1338

@dbus.service.method(dbus.INTROSPECTABLE_IFACE,

1288

1339

out_signature="s",

1289

path_keyword='object_path',

1290

connection_keyword='connection')

1340

path_keyword="object_path",

1341

connection_keyword="connection")

1291

1342

def Introspect(self, object_path, connection):

1292

1343

"""Overloading of standard D-Bus method.

1293

1344

1407

1458

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

1408

1459

"'ay' signature {!r}"

1409

1460

.format(prop._dbus_signature))

1410

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

1411

for byte in value))

1461

value = dbus.ByteArray(bytes(value))

1412

1462

prop(value)

1413

1463

1414

1464

@dbus.service.method(dbus.PROPERTIES_IFACE,

1447

1497

1448

1498

@dbus.service.method(dbus.INTROSPECTABLE_IFACE,

1449

1499

out_signature="s",

1450

path_keyword='object_path',

1451

connection_keyword='connection')

1500

path_keyword="object_path",

1501

connection_keyword="connection")

1452

1502

def Introspect(self, object_path, connection):

1453

1503

"""Overloading of standard D-Bus method.

1454

1504

1549

1599

1550

1600

@dbus.service.method(dbus.INTROSPECTABLE_IFACE,

1551

1601

out_signature="s",

1552

path_keyword='object_path',

1553

connection_keyword='connection')

1602

path_keyword="object_path",

1603

connection_keyword="connection")

1554

1604

def Introspect(self, object_path, connection):

1555

1605

"""Overloading of standard D-Bus method.

1556

1606

2219

2269

del _interface

2220

2270

2221

2271

2222

class ProxyClient(object):

2272

class ProxyClient:

2223

2273

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

2224

2274

self._pipe = child_pipe

2225

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

2275

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

2226

2276

if not self._pipe.recv():

2227

2277

raise KeyError(key_id or fpr)

2228

2278

2229

2279

def __getattribute__(self, name):

2230

if name == '_pipe':

2280

if name == "_pipe":

2231

2281

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

2232

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

2282

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

2233

2283

data = self._pipe.recv()

2234

if data[0] == 'data':

2284

if data[0] == "data":

2235

2285

return data[1]

2236

if data[0] == 'function':

2286

if data[0] == "function":

2237

2287

2238

2288

def func(*args, **kwargs):

2239

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

2289

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

2240

2290

return self._pipe.recv()[1]

2241

2291

2242

2292

return func

2243

2293

2244

2294

def __setattr__(self, name, value):

2245

if name == '_pipe':

2295

if name == "_pipe":

2246

2296

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

2247

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

2297

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

2248

2298

2249

2299

2250

2300

class ClientHandler(socketserver.BaseRequestHandler, object):

2262

2312

2263

2313

session = gnutls.ClientSession(self.request)

2264

2314

2265

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

2315

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

2266

2316

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

2267

2317

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

2268

2318

# "+DHE-DSS"))

2270

2320

priority = self.server.gnutls_priority

2271

2321

if priority is None:

2272

2322

priority = "NORMAL"

2273

gnutls.priority_set_direct(session._c_object,

2274

priority.encode("utf-8"),

2275

None)

2323

gnutls.priority_set_direct(session,

2324

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

2276

2325

2277

2326

# Start communication using the Mandos protocol

2278

2327

# Get protocol number

2298

2347

approval_required = False

2299

2348

try:

2300

2349

if gnutls.has_rawpk:

2301

fpr = ""

2350

fpr = b""

2302

2351

try:

2303

2352

key_id = self.key_id(

2304

2353

self.peer_certificate(session))

2305

2354

except (TypeError, gnutls.Error) as error:

2306

2355

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

2307

2356

return

2308

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

2357

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

2358

key_id.decode("utf-8",

2359

errors="replace"))

2309

2360

2310

2361

else:

2311

key_id = ""

2362

key_id = b""

2312

2363

try:

2313

2364

fpr = self.fingerprint(

2314

2365

self.peer_certificate(session))

2403

2454

def peer_certificate(session):

2404

2455

"Return the peer's certificate as a bytestring"

2405

2456

try:

2406

cert_type = gnutls.certificate_type_get2(session._c_object,

2407

gnutls.CTYPE_PEERS)

2457

cert_type = gnutls.certificate_type_get2(

2458

session, gnutls.CTYPE_PEERS)

2408

2459

except AttributeError:

2409

cert_type = gnutls.certificate_type_get(session._c_object)

2460

cert_type = gnutls.certificate_type_get(session)

2410

2461

if gnutls.has_rawpk:

2411

2462

valid_cert_types = frozenset((gnutls.CRT_RAWPK,))

2412

2463

else:

2419

2470

return b""

2420

2471

list_size = ctypes.c_uint(1)

2421

2472

cert_list = (gnutls.certificate_get_peers

2422

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

2473

(session, ctypes.byref(list_size)))

2423

2474

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

2424

2475

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

2425

2476

if list_size.value == 0:

2447

2498

buf = ctypes.create_string_buffer(32)

2448

2499

buf_len = ctypes.c_size_t(len(buf))

2449

2500

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

2450

gnutls.pubkey_get_key_id(pubkey,

2451

gnutls.KEYID_USE_SHA256,

2452

ctypes.cast(ctypes.byref(buf),

2453

ctypes.POINTER(ctypes.c_ubyte)),

2454

ctypes.byref(buf_len))

2501

gnutls.pubkey_get_key_id(

2502

pubkey,

2503

gnutls.KEYID_USE_SHA256,

2504

ctypes.cast(ctypes.byref(buf),

2505

ctypes.POINTER(ctypes.c_ubyte)),

2506

ctypes.byref(buf_len))

2455

2507

# Deinit the certificate

2456

2508

gnutls.pubkey_deinit(pubkey)

2457

2509

2498

2550

return hex_fpr

2499

2551

2500

2552

2501

class MultiprocessingMixIn(object):

2553

class MultiprocessingMixIn:

2502

2554

"""Like socketserver.ThreadingMixIn, but with multiprocessing"""

2503

2555

2504

2556

def sub_process_main(self, request, address):

2516

2568

return proc

2517

2569

2518

2570

2519

class MultiprocessingMixInWithPipe(MultiprocessingMixIn, object):

2571

class MultiprocessingMixInWithPipe(MultiprocessingMixIn):

2520

2572

""" adds a pipe to the MixIn """

2521

2573

2522

2574

def process_request(self, request, client_address):

2537

2589

2538

2590

2539

2591

class IPv6_TCPServer(MultiprocessingMixInWithPipe,

2540

socketserver.TCPServer, object):

2541

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

2592

socketserver.TCPServer):

2593

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

2542

2594

2543

2595

Attributes:

2544

2596

enabled: Boolean; whether this server is activated yet

2616

2668

raise

2617

2669

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

2618

2670

if self.server_address[0] or self.server_address[1]:

2671

if self.server_address[1]:

2672

self.allow_reuse_address = True

2619

2673

if not self.server_address[0]:

2620

2674

if self.address_family == socket.AF_INET6:

2621

2675

any_address = "::" # in6addr_any

2674

2728

def add_pipe(self, parent_pipe, proc):

2675

2729

# Call "handle_ipc" for both data and EOF events

2676

2730

GLib.io_add_watch(

2677

parent_pipe.fileno(),

2678

GLib.IO_IN | GLib.IO_HUP,

2731

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

2732

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

2679

2733

functools.partial(self.handle_ipc,

2680

2734

parent_pipe=parent_pipe,

2681

2735

proc=proc))

2694

2748

request = parent_pipe.recv()

2695

2749

command = request[0]

2696

2750

2697

if command == 'init':

2751

if command == "init":

2698

2752

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

2699

2753

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

2700

2754

address = request[3]

2701

2755

2702

2756

for c in self.clients.values():

2703

if key_id == "E3B0C44298FC1C149AFBF4C8996FB92427AE41E4649B934CA495991B7852B855":

2757

if key_id == ("E3B0C44298FC1C149AFBF4C8996FB924"

2758

"27AE41E4649B934CA495991B7852B855"):

2704

2759

continue

2705

2760

if key_id and c.key_id == key_id:

2706

2761

client = c

2719

2774

return False

2720

2775

2721

2776

GLib.io_add_watch(

2722

parent_pipe.fileno(),

2723

GLib.IO_IN | GLib.IO_HUP,

2777

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

2778

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

2724

2779

functools.partial(self.handle_ipc,

2725

2780

parent_pipe=parent_pipe,

2726

2781

proc=proc,

2729

2784

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

2730

2785

# same fileno

2731

2786

return False

2732

if command == 'funcall':

2787

if command == "funcall":

2733

2788

funcname = request[1]

2734

2789

args = request[2]

2735

2790

kwargs = request[3]

2736

2791

2737

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

2792

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

2738

2793

funcname)(*args,

2739

2794

**kwargs)))

2740

2795

2741

if command == 'getattr':

2796

if command == "getattr":

2742

2797

attrname = request[1]

2743

2798

if isinstance(client_object.__getattribute__(attrname),

2744

collections.Callable):

2745

parent_pipe.send(('function', ))

2799

collections.abc.Callable):

2800

parent_pipe.send(("function", ))

2746

2801

else:

2747

2802

parent_pipe.send((

2748

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

2803

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

2749

2804

2750

if command == 'setattr':

2805

if command == "setattr":

2751

2806

attrname = request[1]

2752

2807

value = request[2]

2753

2808

setattr(client_object, attrname, value)

2758

2813

def rfc3339_duration_to_delta(duration):

2759

2814

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

2760

2815

2761

>>> rfc3339_duration_to_delta("P7D")

2762

datetime.timedelta(7)

2763

>>> rfc3339_duration_to_delta("PT60S")

2764

datetime.timedelta(0, 60)

2765

>>> rfc3339_duration_to_delta("PT60M")

2766

datetime.timedelta(0, 3600)

2767

>>> rfc3339_duration_to_delta("PT24H")

2768

datetime.timedelta(1)

2769

>>> rfc3339_duration_to_delta("P1W")

2770

datetime.timedelta(7)

2771

>>> rfc3339_duration_to_delta("PT5M30S")

2772

datetime.timedelta(0, 330)

2773

>>> rfc3339_duration_to_delta("P1DT3M20S")

2774

datetime.timedelta(1, 200)

2816

>>> timedelta = datetime.timedelta

2817

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

2818

True

2819

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

2820

True

2821

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

2822

True

2823

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

2824

True

2825

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

2826

True

2827

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

2828

True

2829

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

2830

True

2831

>>> del timedelta

2775

2832

"""

2776

2833

2777

2834

# Parsing an RFC 3339 duration with regular expressions is not

2857

2914

def string_to_delta(interval):

2858

2915

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

2859

2916

2860

>>> string_to_delta('7d')

2861

datetime.timedelta(7)

2862

>>> string_to_delta('60s')

2863

datetime.timedelta(0, 60)

2864

>>> string_to_delta('60m')

2865

datetime.timedelta(0, 3600)

2866

>>> string_to_delta('24h')

2867

datetime.timedelta(1)

2868

>>> string_to_delta('1w')

2869

datetime.timedelta(7)

2870

>>> string_to_delta('5m 30s')

2871

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)

2928

True

2872

2929

"""

2873

2930

2874

2931

try:

2976

3033

2977

3034

options = parser.parse_args()

2978

3035

2979

if options.check:

2980

import doctest

2981

fail_count, test_count = doctest.testmod()

2982

sys.exit(os.EX_OK if fail_count == 0 else 1)

2983

2984

3036

# Default values for config file for server-global settings

2985

3037

if gnutls.has_rawpk:

2986

3038

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

3006

3058

del priority

3007

3059

3008

3060

# Parse config file for server-global settings

3009

server_config = configparser.SafeConfigParser(server_defaults)

3061

server_config = configparser.ConfigParser(server_defaults)

3010

3062

del server_defaults

3011

3063

server_config.read(os.path.join(options.configdir, "mandos.conf"))

3012

# Convert the SafeConfigParser object to a dict

3064

# Convert the ConfigParser object to a dict

3013

3065

server_settings = server_config.defaults()

3014

3066

# Use the appropriate methods on the non-string config options

3015

3067

for option in ("debug", "use_dbus", "use_ipv6", "restore",

3082

3134

3083

3135

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

3084

3136

syslogger.setFormatter(

3085

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

3086

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

3137

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

3138

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

3087

3139

server_settings["servicename"])))

3088

3140

3089

3141

# Parse config file with clients

3090

client_config = configparser.SafeConfigParser(Client

3091

.client_defaults)

3142

client_config = configparser.ConfigParser(Client.client_defaults)

3092

3143

client_config.read(os.path.join(server_settings["configdir"],

3093

3144

"clients.conf"))

3094

3145

3150

3201

3151

3202

@gnutls.log_func

3152

3203

def debug_gnutls(level, string):

3153

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

3204

logger.debug("GnuTLS: %s",

3205

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

3206

errors="replace"))

3154

3207

3155

3208

gnutls.global_set_log_function(debug_gnutls)

3156

3209

3165

3218

# Close all input and output, do double fork, etc.

3166

3219

daemon()

3167

3220

3168

# multiprocessing will use threads, so before we use GLib we need

3169

# to inform GLib that threads will be used.

3170

GLib.threads_init()

3221

if gi.version_info < (3, 10, 2):

3222

# multiprocessing will use threads, so before we use GLib we

3223

# need to inform GLib that threads will be used.

3224

GLib.threads_init()

3171

3225

3172

3226

global main_loop

3173

3227

# From the Avahi example code

3249

3303

if isinstance(s, bytes)

3250

3304

else s) for s in

3251

3305

value["client_structure"]]

3252

# .name & .host

3253

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

3306

# .name, .host, and .checker_command

3307

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

3254

3308

if isinstance(value[k], bytes):

3255

3309

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

3256

if not value.has_key("key_id"):

3310

if "key_id" not in value:

3257

3311

value["key_id"] = ""

3258

elif not value.has_key("fingerprint"):

3312

elif "fingerprint" not in value:

3259

3313

value["fingerprint"] = ""

3260

3314

# old_client_settings

3261

3315

# .keys()

3266

3320

for key, value in

3267

3321

bytes_old_client_settings.items()}

3268

3322

del bytes_old_client_settings

3269

# .host

3323

# .host and .checker_command

3270

3324

for value in old_client_settings.values():

3271

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

3272

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

3273

.decode("utf-8"))

3325

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

3326

if isinstance(value[attribute], bytes):

3327

value[attribute] = (value[attribute]

3328

.decode("utf-8"))

3274

3329

os.remove(stored_state_path)

3275

3330

except IOError as e:

3276

3331

if e.errno == errno.ENOENT:

3529

3584

3530

3585

try:

3531

3586

with tempfile.NamedTemporaryFile(

3532

mode='wb',

3587

mode="wb",

3533

3588

suffix=".pickle",

3534

prefix='clients-',

3589

prefix="clients-",

3535

3590

dir=os.path.dirname(stored_state_path),

3536

3591

delete=False) as stored_state:

3537

3592

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

3601

3656

sys.exit(1)

3602

3657

# End of Avahi example code

3603

3658

3604

GLib.io_add_watch(tcp_server.fileno(), GLib.IO_IN,

3605

lambda *args, **kwargs:

3606

(tcp_server.handle_request

3607

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

3659

GLib.io_add_watch(

3660

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

3661

GLib.PRIORITY_DEFAULT, GLib.IO_IN,

3662

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

3663

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

3608

3664

3609

3665

logger.debug("Starting main loop")

3610

3666

main_loop.run()

3620

3676

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

3621

3677

cleanup()

3622

3678

3623

3624

if __name__ == '__main__':

3625

main()

3679

3680

def should_only_run_tests():

3681

parser = argparse.ArgumentParser(add_help=False)

3682

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

3683

args, unknown_args = parser.parse_known_args()

3684

run_tests = args.check

3685

if run_tests:

3686

# Remove --check argument from sys.argv

3687

sys.argv[1:] = unknown_args

3688

return run_tests

3689

3690

# Add all tests from doctest strings

3691

def load_tests(loader, tests, none):

3692

import doctest

3693

tests.addTests(doctest.DocTestSuite())

3694

return tests

3695

3696

if __name__ == "__main__":

3697

try:

3698

if should_only_run_tests():

3699

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

3700

unittest.main()

3701

else:

3702

main()

3703

finally:

3704

logging.shutdown()