/mandos/trunk : revision 1299

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

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#

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

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#

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# "AvahiService" class, and some lines in "main".

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#

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# Everything else is

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#

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# This file is part of Mandos.

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#

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#

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# Contact the authors at <mandos@recompile.se>.

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#

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from __future__ import (division, absolute_import, print_function,

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unicode_literals)

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except ImportError:

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pass

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import sys

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import unittest

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import argparse

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import logging

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import os

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try:

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import SocketServer as socketserver

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except ImportError:

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import socketserver

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import socket

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import argparse

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import datetime

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import errno

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try:

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import ConfigParser as configparser

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except ImportError:

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import configparser

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import sys

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import re

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import os

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import signal

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import subprocess

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import atexit

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import stat

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import logging

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import logging.handlers

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import pwd

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import contextlib

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import itertools

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import collections

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import codecs

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import random

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import shlex

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import dbus

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import dbus.service

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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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input = raw_input

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

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try:

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collections.abc.Callable

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except AttributeError:

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class abc:

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Callable = collections.Callable

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collections.abc = abc

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del abc

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# Add shlex.quote if it does not exist

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try:

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shlex.quote

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except AttributeError:

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shlex.quote = re.escape

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# Show warnings by default

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if not sys.warnoptions:

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import warnings

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warnings.simplefilter("default")

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# Try to find the value of SO_BINDTODEVICE:

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try:

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# 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 = "1.8.16"

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stored_state_file = "clients.pickle"

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logger = logging.getLogger()

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log = logging.getLogger(os.path.basename(sys.argv[0]))

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

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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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logger.addHandler(syslogger)

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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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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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logger.addHandler(console)

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logger.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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log.addHandler(console)

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log.setLevel(level)

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class PGPError(Exception):

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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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def rename(self, remove=True):

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

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if self.rename_count >= self.max_renames:

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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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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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raise AvahiServiceError("Too many renames")

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self.name = str(

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self.server.GetAlternativeServiceName(self.name))

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self.rename_count += 1

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

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self.name)

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

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self.name)

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if remove:

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self.remove()

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try:

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except dbus.exceptions.DBusException as error:

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if (error.get_dbus_name()

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

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

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

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return self.rename(remove=False)

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else:

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

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

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self.cleanup()

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os._exit(1)

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avahi.DBUS_INTERFACE_ENTRY_GROUP)

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self.entry_group_state_changed_match = (

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self.group.connect_to_signal(

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'StateChanged', self.entry_group_state_changed))

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

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self.name, self.type)

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self.group.AddService(

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self.interface,

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self.protocol,

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def entry_group_state_changed(self, state, error):

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

425

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

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

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454

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if state == avahi.ENTRY_GROUP_ESTABLISHED:

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logger.debug("Zeroconf service established.")

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log.debug("Zeroconf service established.")

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457

elif state == avahi.ENTRY_GROUP_COLLISION:

430

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

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

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self.rename()

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elif state == avahi.ENTRY_GROUP_FAILURE:

433

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

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str(error))

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

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str(error))

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

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def cleanup(self):

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

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

450

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

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

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bad_states = {

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avahi.SERVER_INVALID: "Zeroconf server invalid",

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avahi.SERVER_REGISTERING: None,

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if state in bad_states:

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if bad_states[state] is not None:

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if error is None:

460

logger.error(bad_states[state])

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log.error(bad_states[state])

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else:

462

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

490

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

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self.cleanup()

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elif state == avahi.SERVER_RUNNING:

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try:

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except dbus.exceptions.DBusException as error:

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if (error.get_dbus_name()

469

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

470

logger.info("Local Zeroconf service name"

471

" collision.")

498

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

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return self.rename(remove=False)

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else:

474

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

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

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self.cleanup()

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os._exit(1)

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else:

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if error is None:

479

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

506

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

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507

else:

481

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

508

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

482

509

483

510

def activate(self):

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

496

523

class AvahiServiceToSyslog(AvahiService):

497

524

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

498

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

499

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

526

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

527

**kwargs)

500

528

syslogger.setFormatter(logging.Formatter(

501

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

529

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

502

530

.format(self.name)))

503

531

return ret

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532

505

533

506

534

# Pretend that we have a GnuTLS module

507

class GnuTLS(object):

508

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

509

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

535

class gnutls:

536

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

510

537

511

538

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

512

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if library is None:

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540

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

514

541

_library = ctypes.cdll.LoadLibrary(library)

515

542

del library

516

_need_version = b"3.3.0"

517

_tls_rawpk_version = b"3.6.6"

518

519

def __init__(self):

520

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

521

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

522

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

523

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

524

.format(self._need_version))

525

543

526

544

# Unless otherwise indicated, the constants and types below are

527

545

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

544

562

OPENPGP_FMT_RAW = 0 # gnutls/openpgp.h

545

563

546

564

# Types

547

class session_int(ctypes.Structure):

565

class _session_int(ctypes.Structure):

548

566

_fields_ = []

549

session_t = ctypes.POINTER(session_int)

567

session_t = ctypes.POINTER(_session_int)

550

568

551

569

class certificate_credentials_st(ctypes.Structure):

552

570

_fields_ = []

555

573

certificate_type_t = ctypes.c_int

556

574

557

575

class datum_t(ctypes.Structure):

558

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

559

('size', ctypes.c_uint)]

576

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

577

("size", ctypes.c_uint)]

560

578

561

class openpgp_crt_int(ctypes.Structure):

579

class _openpgp_crt_int(ctypes.Structure):

562

580

_fields_ = []

563

openpgp_crt_t = ctypes.POINTER(openpgp_crt_int)

581

openpgp_crt_t = ctypes.POINTER(_openpgp_crt_int)

564

582

openpgp_crt_fmt_t = ctypes.c_int # gnutls/openpgp.h

565

583

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

566

584

credentials_type_t = ctypes.c_int

569

587

570

588

# Exceptions

571

589

class Error(Exception):

572

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

573

# exception might be raised from within GnuTLS.__init__,

574

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

575

# global variable has happened.

576

590

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

577

591

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

578

592

# code is passed, convert it to a string with

579

593

# gnutls.strerror()

580

594

self.code = code

581

595

if message is None and code is not None:

582

message = GnuTLS.strerror(code)

583

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

596

message = gnutls.strerror(code).decode(

597

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

598

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

584

599

message, *args)

585

600

586

601

class CertificateSecurityError(Error):

587

602

pass

588

603

604

class PointerTo:

605

def __init__(self, cls):

606

self.cls = cls

607

608

def from_param(self, obj):

609

if not isinstance(obj, self.cls):

610

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

611

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

612

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

613

614

class CastToVoidPointer:

615

def __init__(self, cls):

616

self.cls = cls

617

618

def from_param(self, obj):

619

if not isinstance(obj, self.cls):

620

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

621

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

622

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

623

624

class With_from_param:

625

@classmethod

626

def from_param(cls, obj):

627

return obj._as_parameter_

628

589

629

# Classes

590

class Credentials(object):

630

class Credentials(With_from_param):

591

631

def __init__(self):

592

self._c_object = gnutls.certificate_credentials_t()

593

gnutls.certificate_allocate_credentials(

594

ctypes.byref(self._c_object))

632

self._as_parameter_ = gnutls.certificate_credentials_t()

633

gnutls.certificate_allocate_credentials(self)

595

634

self.type = gnutls.CRD_CERTIFICATE

596

635

597

636

def __del__(self):

598

gnutls.certificate_free_credentials(self._c_object)

637

gnutls.certificate_free_credentials(self)

599

638

600

class ClientSession(object):

639

class ClientSession(With_from_param):

601

640

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

602

self._c_object = gnutls.session_t()

641

self._as_parameter_ = gnutls.session_t()

603

642

gnutls_flags = gnutls.CLIENT

604

if gnutls.check_version("3.5.6"):

643

if gnutls.check_version(b"3.5.6"):

605

644

gnutls_flags |= gnutls.NO_TICKETS

606

645

if gnutls.has_rawpk:

607

646

gnutls_flags |= gnutls.ENABLE_RAWPK

608

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

647

gnutls.init(self, gnutls_flags)

609

648

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)

649

gnutls.set_default_priority(self)

650

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

651

gnutls.handshake_set_private_extensions(self, True)

614

652

self.socket = socket

615

653

if credentials is None:

616

654

credentials = gnutls.Credentials()

617

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

618

ctypes.cast(credentials._c_object,

619

ctypes.c_void_p))

655

gnutls.credentials_set(self, credentials.type,

656

credentials)

620

657

self.credentials = credentials

621

658

622

659

def __del__(self):

623

gnutls.deinit(self._c_object)

660

gnutls.deinit(self)

624

661

625

662

def handshake(self):

626

return gnutls.handshake(self._c_object)

663

return gnutls.handshake(self)

627

664

628

665

def send(self, data):

629

666

data = bytes(data)

630

667

data_len = len(data)

631

668

while data_len > 0:

632

data_len -= gnutls.record_send(self._c_object,

633

data[-data_len:],

669

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

634

670

data_len)

635

671

636

672

def bye(self):

637

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

673

return gnutls.bye(self, gnutls.SHUT_RDWR)

638

674

639

675

# Error handling functions

640

676

def _error_code(result):

641

677

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

642

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

643

if result >= 0:

678

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

679

if result >= gnutls.E_SUCCESS:

644

680

return result

645

681

if result == gnutls.E_NO_CERTIFICATE_FOUND:

646

682

raise gnutls.CertificateSecurityError(code=result)

647

683

raise gnutls.Error(code=result)

648

684

649

def _retry_on_error(result, func, arguments):

685

def _retry_on_error(result, func, arguments,

686

_error_code=_error_code):

650

687

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

651

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

652

while result < 0:

688

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

689

while result < gnutls.E_SUCCESS:

653

690

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

654

691

return _error_code(result)

655

692

result = func(*arguments)

660

697

661

698

# Functions

662

699

priority_set_direct = _library.gnutls_priority_set_direct

663

priority_set_direct.argtypes = [session_t, ctypes.c_char_p,

700

priority_set_direct.argtypes = [ClientSession, ctypes.c_char_p,

664

701

ctypes.POINTER(ctypes.c_char_p)]

665

702

priority_set_direct.restype = _error_code

666

703

667

704

init = _library.gnutls_init

668

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

705

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

669

706

init.restype = _error_code

670

707

671

708

set_default_priority = _library.gnutls_set_default_priority

672

set_default_priority.argtypes = [session_t]

709

set_default_priority.argtypes = [ClientSession]

673

710

set_default_priority.restype = _error_code

674

711

675

712

record_send = _library.gnutls_record_send

676

record_send.argtypes = [session_t, ctypes.c_void_p,

713

record_send.argtypes = [ClientSession, ctypes.c_void_p,

677

714

ctypes.c_size_t]

678

715

record_send.restype = ctypes.c_ssize_t

679

716

record_send.errcheck = _retry_on_error

681

718

certificate_allocate_credentials = (

682

719

_library.gnutls_certificate_allocate_credentials)

683

720

certificate_allocate_credentials.argtypes = [

684

ctypes.POINTER(certificate_credentials_t)]

721

PointerTo(Credentials)]

685

722

certificate_allocate_credentials.restype = _error_code

686

723

687

724

certificate_free_credentials = (

688

725

_library.gnutls_certificate_free_credentials)

689

certificate_free_credentials.argtypes = [

690

certificate_credentials_t]

726

certificate_free_credentials.argtypes = [Credentials]

691

727

certificate_free_credentials.restype = None

692

728

693

729

handshake_set_private_extensions = (

694

730

_library.gnutls_handshake_set_private_extensions)

695

handshake_set_private_extensions.argtypes = [session_t,

731

handshake_set_private_extensions.argtypes = [ClientSession,

696

732

ctypes.c_int]

697

733

handshake_set_private_extensions.restype = None

698

734

699

735

credentials_set = _library.gnutls_credentials_set

700

credentials_set.argtypes = [session_t, credentials_type_t,

701

ctypes.c_void_p]

736

credentials_set.argtypes = [ClientSession, credentials_type_t,

737

CastToVoidPointer(Credentials)]

702

738

credentials_set.restype = _error_code

703

739

704

740

strerror = _library.gnutls_strerror

706

742

strerror.restype = ctypes.c_char_p

707

743

708

744

certificate_type_get = _library.gnutls_certificate_type_get

709

certificate_type_get.argtypes = [session_t]

745

certificate_type_get.argtypes = [ClientSession]

710

746

certificate_type_get.restype = _error_code

711

747

712

748

certificate_get_peers = _library.gnutls_certificate_get_peers

713

certificate_get_peers.argtypes = [session_t,

749

certificate_get_peers.argtypes = [ClientSession,

714

750

ctypes.POINTER(ctypes.c_uint)]

715

751

certificate_get_peers.restype = ctypes.POINTER(datum_t)

716

752

723

759

global_set_log_function.restype = None

724

760

725

761

deinit = _library.gnutls_deinit

726

deinit.argtypes = [session_t]

762

deinit.argtypes = [ClientSession]

727

763

deinit.restype = None

728

764

729

765

handshake = _library.gnutls_handshake

730

handshake.argtypes = [session_t]

731

handshake.restype = _error_code

766

handshake.argtypes = [ClientSession]

767

handshake.restype = ctypes.c_int

732

768

handshake.errcheck = _retry_on_error

733

769

734

770

transport_set_ptr = _library.gnutls_transport_set_ptr

735

transport_set_ptr.argtypes = [session_t, transport_ptr_t]

771

transport_set_ptr.argtypes = [ClientSession, transport_ptr_t]

736

772

transport_set_ptr.restype = None

737

773

738

774

bye = _library.gnutls_bye

739

bye.argtypes = [session_t, close_request_t]

740

bye.restype = _error_code

775

bye.argtypes = [ClientSession, close_request_t]

776

bye.restype = ctypes.c_int

741

777

bye.errcheck = _retry_on_error

742

778

743

779

check_version = _library.gnutls_check_version

744

780

check_version.argtypes = [ctypes.c_char_p]

745

781

check_version.restype = ctypes.c_char_p

746

782

783

_need_version = b"3.3.0"

784

if check_version(_need_version) is None:

785

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

786

.format(_need_version))

787

788

_tls_rawpk_version = b"3.6.6"

747

789

has_rawpk = bool(check_version(_tls_rawpk_version))

748

790

749

791

if has_rawpk:

754

796

755

797

x509_crt_fmt_t = ctypes.c_int

756

798

757

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

799

# All the function declarations below are from

800

# gnutls/abstract.h

758

801

pubkey_init = _library.gnutls_pubkey_init

759

802

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

760

803

pubkey_init.restype = _error_code

774

817

pubkey_deinit.argtypes = [pubkey_t]

775

818

pubkey_deinit.restype = None

776

819

else:

777

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

820

# All the function declarations below are from

821

# gnutls/openpgp.h

778

822

779

823

openpgp_crt_init = _library.gnutls_openpgp_crt_init

780

824

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

786

830

openpgp_crt_fmt_t]

787

831

openpgp_crt_import.restype = _error_code

788

832

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)]

833

openpgp_crt_verify_self = \

834

_library.gnutls_openpgp_crt_verify_self

835

openpgp_crt_verify_self.argtypes = [

836

openpgp_crt_t,

837

ctypes.c_uint,

838

ctypes.POINTER(ctypes.c_uint),

839

]

792

840

openpgp_crt_verify_self.restype = _error_code

793

841

794

842

openpgp_crt_deinit = _library.gnutls_openpgp_crt_deinit

803

851

ctypes.c_size_t)]

804

852

openpgp_crt_get_fingerprint.restype = _error_code

805

853

806

if check_version("3.6.4"):

854

if check_version(b"3.6.4"):

807

855

certificate_type_get2 = _library.gnutls_certificate_type_get2

808

certificate_type_get2.argtypes = [session_t, ctypes.c_int]

856

certificate_type_get2.argtypes = [ClientSession, ctypes.c_int]

809

857

certificate_type_get2.restype = _error_code

810

858

811

859

# Remove non-public functions

812

860

del _error_code, _retry_on_error

813

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

814

gnutls = GnuTLS()

815

861

816

862

817

863

def call_pipe(connection, # : multiprocessing.Connection

825

871

connection.close()

826

872

827

873

828

class Client(object):

874

class Client:

829

875

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

830

876

831

877

Attributes:

832

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

878

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

833

879

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

834

880

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.

881

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

882

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

883

running.

838

884

checker_callback_tag: a GLib event source tag, or None

839

885

checker_command: string; External command which is run to check

840

886

if client lives. %() expansions are done at

915

961

# key_id() and fingerprint() functions

916

962

client["key_id"] = (section.get("key_id", "").upper()

917

963

.replace(" ", ""))

918

client["fingerprint"] = (section["fingerprint"].upper()

964

client["fingerprint"] = (section.get("fingerprint",

965

"").upper()

919

966

.replace(" ", ""))

967

if not (client["key_id"] or client["fingerprint"]):

968

log.error("Skipping client %s without key_id or"

969

" fingerprint", client_name)

970

del settings[client_name]

971

continue

920

972

if "secret" in section:

921

973

client["secret"] = codecs.decode(section["secret"]

922

974

.encode("utf-8"),

963

1015

self.last_enabled = None

964

1016

self.expires = None

965

1017

966

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

967

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

968

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

1018

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

1019

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

1020

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

969

1021

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

970

1022

datetime.datetime.utcnow())

971

1023

999

1051

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

1000

1052

# Already enabled

1001

1053

return

1002

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

1003

1054

self.enabled = True

1004

1055

self.last_enabled = datetime.datetime.utcnow()

1005

1056

self.init_checker()

1010

1061

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

1011

1062

return False

1012

1063

if not quiet:

1013

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

1064

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

1014

1065

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

1015

1066

GLib.source_remove(self.disable_initiator_tag)

1016

1067

self.disable_initiator_tag = None

1028

1079

def __del__(self):

1029

1080

self.disable()

1030

1081

1031

def init_checker(self):

1032

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

1033

# and every interval from then on.

1082

def init_checker(self, randomize_start=False):

1083

# Schedule a new checker to be started a randomly selected

1084

# time (a fraction of 'interval') from now. This spreads out

1085

# the startup of checkers over time when the server is

1086

# started.

1034

1087

if self.checker_initiator_tag is not None:

1035

1088

GLib.source_remove(self.checker_initiator_tag)

1089

interval_milliseconds = int(self.interval.total_seconds()

1090

* 1000)

1091

if randomize_start:

1092

delay_milliseconds = random.randrange(

1093

interval_milliseconds + 1)

1094

else:

1095

delay_milliseconds = interval_milliseconds

1036

1096

self.checker_initiator_tag = GLib.timeout_add(

1037

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

1038

self.start_checker)

1039

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

1097

delay_milliseconds, self.start_checker, randomize_start)

1098

delay = datetime.timedelta(0, 0, 0, delay_milliseconds)

1099

# A checker might take up to an 'interval' of time, so we can

1100

# expire at the soonest one interval after a checker was

1101

# started. Since the initial checker is delayed, the expire

1102

# time might have to be extended.

1103

now = datetime.datetime.utcnow()

1104

self.expires = now + delay + self.interval

1105

# Schedule a disable() at expire time

1040

1106

if self.disable_initiator_tag is not None:

1041

1107

GLib.source_remove(self.disable_initiator_tag)

1042

1108

self.disable_initiator_tag = GLib.timeout_add(

1043

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

1044

# Also start a new checker *right now*.

1045

self.start_checker()

1109

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

1110

self.disable)

1046

1111

1047

1112

def checker_callback(self, source, condition, connection,

1048

1113

command):

1049

1114

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

1050

self.checker_callback_tag = None

1051

self.checker = None

1052

1115

# Read return code from connection (see call_pipe)

1053

1116

returncode = connection.recv()

1054

1117

connection.close()

1118

if self.checker is not None:

1119

self.checker.join()

1120

self.checker_callback_tag = None

1121

self.checker = None

1055

1122

1056

1123

if returncode >= 0:

1057

1124

self.last_checker_status = returncode

1058

1125

self.last_checker_signal = None

1059

1126

if self.last_checker_status == 0:

1060

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

1061

vars(self))

1127

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

1062

1128

self.checked_ok()

1063

1129

else:

1064

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

1130

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

1065

1131

else:

1066

1132

self.last_checker_status = -1

1067

1133

self.last_checker_signal = -returncode

1068

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

1069

vars(self))

1134

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

1070

1135

return False

1071

1136

1072

1137

def checked_ok(self):

1091

1156

def need_approval(self):

1092

1157

self.last_approval_request = datetime.datetime.utcnow()

1093

1158

1094

def start_checker(self):

1159

def start_checker(self, start_was_randomized=False):

1095

1160

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

1096

1161

1097

1162

If a checker already exists, leave it running and do

1106

1171

# should be.

1107

1172

1108

1173

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

1109

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

1174

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

1110

1175

self.checker.join()

1111

1176

self.checker = None

1112

1177

# Start a new checker if needed

1113

1178

if self.checker is None:

1114

1179

# Escape attributes for the shell

1115

1180

escaped_attrs = {

1116

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

1181

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

1117

1182

for attr in self.runtime_expansions}

1118

1183

try:

1119

1184

command = self.checker_command % escaped_attrs

1120

1185

except TypeError as error:

1121

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

1122

self.checker_command,

1123

exc_info=error)

1186

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

1187

self.checker_command, exc_info=error)

1124

1188

return True # Try again later

1125

1189

self.current_checker_command = command

1126

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

1127

self.name)

1190

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

1128

1191

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

1129

1192

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

1130

1193

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

1146

1209

kwargs=popen_args)

1147

1210

self.checker.start()

1148

1211

self.checker_callback_tag = GLib.io_add_watch(

1149

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

1212

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

1213

GLib.PRIORITY_DEFAULT, GLib.IO_IN,

1150

1214

self.checker_callback, pipe[0], command)

1215

if start_was_randomized:

1216

# We were started after a random delay; Schedule a new

1217

# checker to be started an 'interval' from now, and every

1218

# interval from then on.

1219

now = datetime.datetime.utcnow()

1220

self.checker_initiator_tag = GLib.timeout_add(

1221

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

1222

self.start_checker)

1223

self.expires = max(self.expires, now + self.interval)

1224

# Don't start a new checker again after same random delay

1225

return False

1151

1226

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

1152

1227

return True

1153

1228

1158

1233

self.checker_callback_tag = None

1159

1234

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

1160

1235

return

1161

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

1236

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

1162

1237

self.checker.terminate()

1163

1238

self.checker = None

1164

1239

1191

1266

func._dbus_name = func.__name__

1192

1267

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

1193

1268

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

1194

func._dbus_get_args_options = {'byte_arrays': byte_arrays}

1269

func._dbus_get_args_options = {"byte_arrays": byte_arrays}

1195

1270

return func

1196

1271

1197

1272

return decorator

1286

1361

1287

1362

@dbus.service.method(dbus.INTROSPECTABLE_IFACE,

1288

1363

out_signature="s",

1289

path_keyword='object_path',

1290

connection_keyword='connection')

1364

path_keyword="object_path",

1365

connection_keyword="connection")

1291

1366

def Introspect(self, object_path, connection):

1292

1367

"""Overloading of standard D-Bus method.

1293

1368

1342

1417

document.unlink()

1343

1418

except (AttributeError, xml.dom.DOMException,

1344

1419

xml.parsers.expat.ExpatError) as error:

1345

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

1346

exc_info=error)

1420

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

1421

exc_info=error)

1347

1422

return xmlstring

1348

1423

1349

1424

1407

1482

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

1408

1483

"'ay' signature {!r}"

1409

1484

.format(prop._dbus_signature))

1410

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

1411

for byte in value))

1485

value = dbus.ByteArray(bytes(value))

1412

1486

prop(value)

1413

1487

1414

1488

@dbus.service.method(dbus.PROPERTIES_IFACE,

1447

1521

1448

1522

@dbus.service.method(dbus.INTROSPECTABLE_IFACE,

1449

1523

out_signature="s",

1450

path_keyword='object_path',

1451

connection_keyword='connection')

1524

path_keyword="object_path",

1525

connection_keyword="connection")

1452

1526

def Introspect(self, object_path, connection):

1453

1527

"""Overloading of standard D-Bus method.

1454

1528

1510

1584

document.unlink()

1511

1585

except (AttributeError, xml.dom.DOMException,

1512

1586

xml.parsers.expat.ExpatError) as error:

1513

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

1514

exc_info=error)

1587

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

1588

exc_info=error)

1515

1589

return xmlstring

1516

1590

1517

1591

1549

1623

1550

1624

@dbus.service.method(dbus.INTROSPECTABLE_IFACE,

1551

1625

out_signature="s",

1552

path_keyword='object_path',

1553

connection_keyword='connection')

1626

path_keyword="object_path",

1627

connection_keyword="connection")

1554

1628

def Introspect(self, object_path, connection):

1555

1629

"""Overloading of standard D-Bus method.

1556

1630

1581

1655

document.unlink()

1582

1656

except (AttributeError, xml.dom.DOMException,

1583

1657

xml.parsers.expat.ExpatError) as error:

1584

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

1585

exc_info=error)

1658

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

1659

exc_info=error)

1586

1660

return xmlstring

1587

1661

1588

1662

2219

2293

del _interface

2220

2294

2221

2295

2222

class ProxyClient(object):

2296

class ProxyClient:

2223

2297

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

2224

2298

self._pipe = child_pipe

2225

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

2299

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

2226

2300

if not self._pipe.recv():

2227

2301

raise KeyError(key_id or fpr)

2228

2302

2229

2303

def __getattribute__(self, name):

2230

if name == '_pipe':

2304

if name == "_pipe":

2231

2305

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

2232

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

2306

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

2233

2307

data = self._pipe.recv()

2234

if data[0] == 'data':

2308

if data[0] == "data":

2235

2309

return data[1]

2236

if data[0] == 'function':

2310

if data[0] == "function":

2237

2311

2238

2312

def func(*args, **kwargs):

2239

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

2313

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

2240

2314

return self._pipe.recv()[1]

2241

2315

2242

2316

return func

2243

2317

2244

2318

def __setattr__(self, name, value):

2245

if name == '_pipe':

2319

if name == "_pipe":

2246

2320

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

2247

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

2321

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

2248

2322

2249

2323

2250

2324

class ClientHandler(socketserver.BaseRequestHandler, object):

2255

2329

2256

2330

def handle(self):

2257

2331

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

2258

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

2259

str(self.client_address))

2260

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

2261

self.server.child_pipe.fileno())

2332

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

2333

str(self.client_address))

2334

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

2262

2335

2263

2336

session = gnutls.ClientSession(self.request)

2264

2337

2265

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

2338

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

2266

2339

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

2267

2340

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

2268

2341

# "+DHE-DSS"))

2270

2343

priority = self.server.gnutls_priority

2271

2344

if priority is None:

2272

2345

priority = "NORMAL"

2273

gnutls.priority_set_direct(session._c_object,

2274

priority.encode("utf-8"),

2275

None)

2346

gnutls.priority_set_direct(session,

2347

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

2276

2348

2277

2349

# Start communication using the Mandos protocol

2278

2350

# Get protocol number

2279

2351

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

2280

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

2352

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

2281

2353

try:

2282

2354

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

2283

2355

raise RuntimeError(line)

2284

2356

except (ValueError, IndexError, RuntimeError) as error:

2285

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

2357

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

2286

2358

return

2287

2359

2288

2360

# Start GnuTLS connection

2289

2361

try:

2290

2362

session.handshake()

2291

2363

except gnutls.Error as error:

2292

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

2364

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

2293

2365

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

2294

2366

# established. Just abandon the request.

2295

2367

return

2296

logger.debug("Handshake succeeded")

2368

log.debug("Handshake succeeded")

2297

2369

2298

2370

approval_required = False

2299

2371

try:

2300

2372

if gnutls.has_rawpk:

2301

fpr = ""

2373

fpr = b""

2302

2374

try:

2303

2375

key_id = self.key_id(

2304

2376

self.peer_certificate(session))

2305

2377

except (TypeError, gnutls.Error) as error:

2306

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

2378

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

2307

2379

return

2308

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

2380

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

2381

key_id.decode("utf-8",

2382

errors="replace"))

2309

2383

2310

2384

else:

2311

key_id = ""

2385

key_id = b""

2312

2386

try:

2313

2387

fpr = self.fingerprint(

2314

2388

self.peer_certificate(session))

2315

2389

except (TypeError, gnutls.Error) as error:

2316

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

2390

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

2317

2391

return

2318

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

2392

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

2319

2393

2320

2394

try:

2321

2395

client = ProxyClient(child_pipe, key_id, fpr,

2330

2404

2331

2405

while True:

2332

2406

if not client.enabled:

2333

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

2334

client.name)

2407

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

2335

2408

if self.server.use_dbus:

2336

2409

# Emit D-Bus signal

2337

2410

client.Rejected("Disabled")

2341

2414

# We are approved or approval is disabled

2342

2415

break

2343

2416

elif client.approved is None:

2344

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

2345

client.name)

2417

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

2418

client.name)

2346

2419

if self.server.use_dbus:

2347

2420

# Emit D-Bus signal

2348

2421

client.NeedApproval(

2349

2422

client.approval_delay.total_seconds()

2350

2423

* 1000, client.approved_by_default)

2351

2424

else:

2352

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

2353

client.name)

2425

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

2426

client.name)

2354

2427

if self.server.use_dbus:

2355

2428

# Emit D-Bus signal

2356

2429

client.Rejected("Denied")

2364

2437

time2 = datetime.datetime.now()

2365

2438

if (time2 - time) >= delay:

2366

2439

if not client.approved_by_default:

2367

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

2368

" waiting for approval",

2369

client.name)

2440

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

2441

" waiting for approval",

2442

client.name)

2370

2443

if self.server.use_dbus:

2371

2444

# Emit D-Bus signal

2372

2445

client.Rejected("Approval timed out")

2379

2452

try:

2380

2453

session.send(client.secret)

2381

2454

except gnutls.Error as error:

2382

logger.warning("gnutls send failed",

2383

exc_info=error)

2455

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

2384

2456

return

2385

2457

2386

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

2458

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

2387

2459

# bump the timeout using extended_timeout

2388

2460

client.bump_timeout(client.extended_timeout)

2389

2461

if self.server.use_dbus:

2396

2468

try:

2397

2469

session.bye()

2398

2470

except gnutls.Error as error:

2399

logger.warning("GnuTLS bye failed",

2400

exc_info=error)

2471

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

2401

2472

2402

2473

@staticmethod

2403

2474

def peer_certificate(session):

2404

2475

"Return the peer's certificate as a bytestring"

2405

2476

try:

2406

cert_type = gnutls.certificate_type_get2(session._c_object,

2407

gnutls.CTYPE_PEERS)

2477

cert_type = gnutls.certificate_type_get2(

2478

session, gnutls.CTYPE_PEERS)

2408

2479

except AttributeError:

2409

cert_type = gnutls.certificate_type_get(session._c_object)

2480

cert_type = gnutls.certificate_type_get(session)

2410

2481

if gnutls.has_rawpk:

2411

2482

valid_cert_types = frozenset((gnutls.CRT_RAWPK,))

2412

2483

else:

2413

2484

valid_cert_types = frozenset((gnutls.CRT_OPENPGP,))

2414

2485

# If not a valid certificate type...

2415

2486

if cert_type not in valid_cert_types:

2416

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

2417

valid_cert_types)

2487

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

2488

valid_cert_types)

2418

2489

# ...return invalid data

2419

2490

return b""

2420

2491

list_size = ctypes.c_uint(1)

2421

2492

cert_list = (gnutls.certificate_get_peers

2422

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

2493

(session, ctypes.byref(list_size)))

2423

2494

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

2424

2495

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

2425

2496

if list_size.value == 0:

2447

2518

buf = ctypes.create_string_buffer(32)

2448

2519

buf_len = ctypes.c_size_t(len(buf))

2449

2520

# 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))

2521

gnutls.pubkey_get_key_id(

2522

pubkey,

2523

gnutls.KEYID_USE_SHA256,

2524

ctypes.cast(ctypes.byref(buf),

2525

ctypes.POINTER(ctypes.c_ubyte)),

2526

ctypes.byref(buf_len))

2455

2527

# Deinit the certificate

2456

2528

gnutls.pubkey_deinit(pubkey)

2457

2529

2498

2570

return hex_fpr

2499

2571

2500

2572

2501

class MultiprocessingMixIn(object):

2573

class MultiprocessingMixIn:

2502

2574

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

2503

2575

2504

2576

def sub_process_main(self, request, address):

2516

2588

return proc

2517

2589

2518

2590

2519

class MultiprocessingMixInWithPipe(MultiprocessingMixIn, object):

2591

class MultiprocessingMixInWithPipe(MultiprocessingMixIn):

2520

2592

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

2521

2593

2522

2594

def process_request(self, request, client_address):

2537

2609

2538

2610

2539

2611

class IPv6_TCPServer(MultiprocessingMixInWithPipe,

2540

socketserver.TCPServer, object):

2541

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

2612

socketserver.TCPServer):

2613

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

2542

2614

2543

2615

Attributes:

2544

2616

enabled: Boolean; whether this server is activated yet

2595

2667

if SO_BINDTODEVICE is None:

2596

2668

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

2597

2669

# common enough.

2598

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

2670

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

2599

2671

SO_BINDTODEVICE = 25

2600

2672

try:

2601

2673

self.socket.setsockopt(

2603

2675

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

2604

2676

except socket.error as error:

2605

2677

if error.errno == errno.EPERM:

2606

logger.error("No permission to bind to"

2607

" interface %s", self.interface)

2678

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

2679

self.interface)

2608

2680

elif error.errno == errno.ENOPROTOOPT:

2609

logger.error("SO_BINDTODEVICE not available;"

2610

" cannot bind to interface %s",

2611

self.interface)

2681

log.error("SO_BINDTODEVICE not available; cannot"

2682

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

2612

2683

elif error.errno == errno.ENODEV:

2613

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

2614

" cannot bind", self.interface)

2684

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

2685

" bind", self.interface)

2615

2686

else:

2616

2687

raise

2617

2688

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

2618

2689

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

2690

if self.server_address[1]:

2691

self.allow_reuse_address = True

2619

2692

if not self.server_address[0]:

2620

2693

if self.address_family == socket.AF_INET6:

2621

2694

any_address = "::" # in6addr_any

2674

2747

def add_pipe(self, parent_pipe, proc):

2675

2748

# Call "handle_ipc" for both data and EOF events

2676

2749

GLib.io_add_watch(

2677

parent_pipe.fileno(),

2678

GLib.IO_IN | GLib.IO_HUP,

2750

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

2751

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

2679

2752

functools.partial(self.handle_ipc,

2680

2753

parent_pipe=parent_pipe,

2681

2754

proc=proc))

2694

2767

request = parent_pipe.recv()

2695

2768

command = request[0]

2696

2769

2697

if command == 'init':

2770

if command == "init":

2698

2771

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

2699

2772

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

2700

2773

address = request[3]

2701

2774

2702

2775

for c in self.clients.values():

2703

if key_id == "E3B0C44298FC1C149AFBF4C8996FB92427AE41E4649B934CA495991B7852B855":

2776

if key_id == ("E3B0C44298FC1C149AFBF4C8996FB924"

2777

"27AE41E4649B934CA495991B7852B855"):

2704

2778

continue

2705

2779

if key_id and c.key_id == key_id:

2706

2780

client = c

2709

2783

client = c

2710

2784

break

2711

2785

else:

2712

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

2713

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

2786

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

2787

" %s", key_id or fpr, address)

2714

2788

if self.use_dbus:

2715

2789

# Emit D-Bus signal

2716

2790

mandos_dbus_service.ClientNotFound(key_id or fpr,

2719

2793

return False

2720

2794

2721

2795

GLib.io_add_watch(

2722

parent_pipe.fileno(),

2723

GLib.IO_IN | GLib.IO_HUP,

2796

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

2797

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

2724

2798

functools.partial(self.handle_ipc,

2725

2799

parent_pipe=parent_pipe,

2726

2800

proc=proc,

2729

2803

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

2730

2804

# same fileno

2731

2805

return False

2732

if command == 'funcall':

2806

if command == "funcall":

2733

2807

funcname = request[1]

2734

2808

args = request[2]

2735

2809

kwargs = request[3]

2736

2810

2737

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

2811

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

2738

2812

funcname)(*args,

2739

2813

**kwargs)))

2740

2814

2741

if command == 'getattr':

2815

if command == "getattr":

2742

2816

attrname = request[1]

2743

2817

if isinstance(client_object.__getattribute__(attrname),

2744

collections.Callable):

2745

parent_pipe.send(('function', ))

2818

collections.abc.Callable):

2819

parent_pipe.send(("function", ))

2746

2820

else:

2747

2821

parent_pipe.send((

2748

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

2822

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

2749

2823

2750

if command == 'setattr':

2824

if command == "setattr":

2751

2825

attrname = request[1]

2752

2826

value = request[2]

2753

2827

setattr(client_object, attrname, value)

2758

2832

def rfc3339_duration_to_delta(duration):

2759

2833

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

2760

2834

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)

2835

>>> timedelta = datetime.timedelta

2836

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

2837

True

2838

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

2839

True

2840

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

2841

True

2842

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

2843

True

2844

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

2845

True

2846

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

2847

True

2848

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

2849

True

2850

>>> del timedelta

2775

2851

"""

2776

2852

2777

2853

# Parsing an RFC 3339 duration with regular expressions is not

2857

2933

def string_to_delta(interval):

2858

2934

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

2859

2935

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)

2936

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

2937

True

2938

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

2939

True

2940

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

2941

True

2942

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

2943

True

2944

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

2945

True

2946

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

2947

True

2872

2948

"""

2873

2949

2874

2950

try:

2976

3052

2977

3053

options = parser.parse_args()

2978

3054

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

3055

# Default values for config file for server-global settings

2985

3056

if gnutls.has_rawpk:

2986

3057

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

3006

3077

del priority

3007

3078

3008

3079

# Parse config file for server-global settings

3009

server_config = configparser.SafeConfigParser(server_defaults)

3080

server_config = configparser.ConfigParser(server_defaults)

3010

3081

del server_defaults

3011

3082

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

3012

# Convert the SafeConfigParser object to a dict

3083

# Convert the ConfigParser object to a dict

3013

3084

server_settings = server_config.defaults()

3014

3085

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

3015

3086

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

3082

3153

3083

3154

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

3084

3155

syslogger.setFormatter(

3085

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

3086

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

3156

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

3157

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

3087

3158

server_settings["servicename"])))

3088

3159

3089

3160

# Parse config file with clients

3090

client_config = configparser.SafeConfigParser(Client

3091

.client_defaults)

3161

client_config = configparser.ConfigParser(Client.client_defaults)

3092

3162

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

3093

3163

"clients.conf"))

3094

3164

3114

3184

try:

3115

3185

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

3116

3186

except IOError as e:

3117

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

3118

exc_info=e)

3187

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

3188

exc_info=e)

3119

3189

3120

3190

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

3121

3191

("mandos", "mandos"),

3132

3202

try:

3133

3203

os.setgid(gid)

3134

3204

os.setuid(uid)

3135

if debug:

3136

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

3137

gid))

3205

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

3138

3206

except OSError as error:

3139

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

3140

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

3207

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

3208

os.strerror(error.errno))

3141

3209

if error.errno != errno.EPERM:

3142

3210

raise

3143

3211

3150

3218

3151

3219

@gnutls.log_func

3152

3220

def debug_gnutls(level, string):

3153

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

3221

log.debug("GnuTLS: %s",

3222

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

3154

3223

3155

3224

gnutls.global_set_log_function(debug_gnutls)

3156

3225

3165

3234

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

3166

3235

daemon()

3167

3236

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()

3237

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

3238

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

3239

# need to inform GLib that threads will be used.

3240

GLib.threads_init()

3171

3241

3172

3242

global main_loop

3173

3243

# From the Avahi example code

3184

3254

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

3185

3255

do_not_queue=True)

3186

3256

except dbus.exceptions.DBusException as e:

3187

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

3257

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

3188

3258

use_dbus = False

3189

3259

server_settings["use_dbus"] = False

3190

3260

tcp_server.use_dbus = False

3249

3319

if isinstance(s, bytes)

3250

3320

else s) for s in

3251

3321

value["client_structure"]]

3252

# .name & .host

3253

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

3322

# .name, .host, and .checker_command

3323

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

3254

3324

if isinstance(value[k], bytes):

3255

3325

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

3256

if not value.has_key("key_id"):

3326

if "key_id" not in value:

3257

3327

value["key_id"] = ""

3258

elif not value.has_key("fingerprint"):

3328

elif "fingerprint" not in value:

3259

3329

value["fingerprint"] = ""

3260

3330

# old_client_settings

3261

3331

# .keys()

3266

3336

for key, value in

3267

3337

bytes_old_client_settings.items()}

3268

3338

del bytes_old_client_settings

3269

# .host

3339

# .host and .checker_command

3270

3340

for value in old_client_settings.values():

3271

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

3272

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

3273

.decode("utf-8"))

3341

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

3342

if isinstance(value[attribute], bytes):

3343

value[attribute] = (value[attribute]

3344

.decode("utf-8"))

3274

3345

os.remove(stored_state_path)

3275

3346

except IOError as e:

3276

3347

if e.errno == errno.ENOENT:

3277

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

3278

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

3348

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

3349

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

3279

3350

else:

3280

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

3281

exc_info=e)

3351

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

3352

exc_info=e)

3282

3353

raise

3283

3354

except EOFError as e:

3284

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

3285

"EOFError:",

3286

exc_info=e)

3355

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

3356

exc_info=e)

3287

3357

3288

3358

with PGPEngine() as pgp:

3289

3359

for client_name, client in clients_data.items():

3316

3386

if client["enabled"]:

3317

3387

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

3318

3388

if not client["last_checked_ok"]:

3319

logger.warning(

3320

"disabling client {} - Client never "

3321

"performed a successful checker".format(

3322

client_name))

3389

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

3390

" never performed a successful"

3391

" checker", client_name)

3323

3392

client["enabled"] = False

3324

3393

elif client["last_checker_status"] != 0:

3325

logger.warning(

3326

"disabling client {} - Client last"

3327

" checker failed with error code"

3328

" {}".format(

3329

client_name,

3330

client["last_checker_status"]))

3394

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

3395

" last checker failed with error"

3396

" code %s", client_name,

3397

client["last_checker_status"])

3331

3398

client["enabled"] = False

3332

3399

else:

3333

3400

client["expires"] = (

3334

3401

datetime.datetime.utcnow()

3335

3402

+ client["timeout"])

3336

logger.debug("Last checker succeeded,"

3337

" keeping {} enabled".format(

3338

client_name))

3403

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

3404

" enabled", client_name)

3339

3405

try:

3340

3406

client["secret"] = pgp.decrypt(

3341

3407

client["encrypted_secret"],

3342

3408

client_settings[client_name]["secret"])

3343

3409

except PGPError:

3344

3410

# If decryption fails, we use secret from new settings

3345

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

3346

client_name))

3411

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

3412

client_name)

3347

3413

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

3348

3414

["secret"])

3349

3415

3363

3429

server_settings=server_settings)

3364

3430

3365

3431

if not tcp_server.clients:

3366

logger.warning("No clients defined")

3432

log.warning("No clients defined")

3367

3433

3368

3434

if not foreground:

3369

3435

if pidfile is not None:

3372

3438

with pidfile:

3373

3439

print(pid, file=pidfile)

3374

3440

except IOError:

3375

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

3376

pidfilename, pid)

3441

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

3442

pidfilename, pid)

3377

3443

del pidfile

3378

3444

del pidfilename

3379

3445

3529

3595

3530

3596

try:

3531

3597

with tempfile.NamedTemporaryFile(

3532

mode='wb',

3598

mode="wb",

3533

3599

suffix=".pickle",

3534

prefix='clients-',

3600

prefix="clients-",

3535

3601

dir=os.path.dirname(stored_state_path),

3536

3602

delete=False) as stored_state:

3537

3603

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

3545

3611

except NameError:

3546

3612

pass

3547

3613

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

3548

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

3549

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

3614

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

3615

os.strerror(e.errno))

3550

3616

else:

3551

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

3552

exc_info=e)

3617

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

3618

exc_info=e)

3553

3619

raise

3554

3620

3555

3621

# Delete all clients, and settings from config

3572

3638

mandos_dbus_service.client_added_signal(client)

3573

3639

# Need to initiate checking of clients

3574

3640

if client.enabled:

3575

client.init_checker()

3641

client.init_checker(randomize_start=True)

3576

3642

3577

3643

tcp_server.enable()

3578

3644

tcp_server.server_activate()

3581

3647

if zeroconf:

3582

3648

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

3583

3649

if use_ipv6:

3584

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

3585

" flowinfo %d, scope_id %d",

3586

*tcp_server.socket.getsockname())

3650

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

3651

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

3587

3652

else: # IPv4

3588

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

3589

*tcp_server.socket.getsockname())

3653

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

3654

*tcp_server.socket.getsockname())

3590

3655

3591

3656

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

3592

3657

3596

3661

try:

3597

3662

service.activate()

3598

3663

except dbus.exceptions.DBusException as error:

3599

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

3664

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

3600

3665

cleanup()

3601

3666

sys.exit(1)

3602

3667

# End of Avahi example code

3603

3668

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))

3669

GLib.io_add_watch(

3670

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

3671

GLib.PRIORITY_DEFAULT, GLib.IO_IN,

3672

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

3673

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

3608

3674

3609

logger.debug("Starting main loop")

3675

log.debug("Starting main loop")

3610

3676

main_loop.run()

3611

3677

except AvahiError as error:

3612

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

3678

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

3613

3679

cleanup()

3614

3680

sys.exit(1)

3615

3681

except KeyboardInterrupt:

3616

3682

if debug:

3617

3683

print("", file=sys.stderr)

3618

logger.debug("Server received KeyboardInterrupt")

3619

logger.debug("Server exiting")

3684

log.debug("Server received KeyboardInterrupt")

3685

log.debug("Server exiting")

3620

3686

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

3621

3687

cleanup()

3622

3688

3623

3624

if __name__ == '__main__':

3625

main()

3689

3690

def parse_test_args():

3691

# type: () -> argparse.Namespace

3692

parser = argparse.ArgumentParser(add_help=False)

3693

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

3694

parser.add_argument("--prefix", )

3695

args, unknown_args = parser.parse_known_args()

3696

if args.check:

3697

# Remove test options from sys.argv

3698

sys.argv[1:] = unknown_args

3699

return args

3700

3701

# Add all tests from doctest strings

3702

def load_tests(loader, tests, none):

3703

import doctest

3704

tests.addTests(doctest.DocTestSuite())

3705

return tests

3706

3707

if __name__ == "__main__":

3708

options = parse_test_args()

3709

try:

3710

if options.check:

3711

extra_test_prefix = options.prefix

3712

if extra_test_prefix is not None:

3713

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

3714

.result.wasSuccessful()):

3715

sys.exit(1)

3716

class ExtraTestLoader(unittest.TestLoader):

3717

testMethodPrefix = extra_test_prefix

3718

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

3719

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

3720

else:

3721

unittest.main(argv=[""])

3722

else:

3723

main()

3724

finally:

3725

logging.shutdown()

3726

3727

# Local Variables:

3728

# run-tests:

3729

# (lambda (&optional extra)

3730

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

3731

# extra))

3732

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

3733

# (funcall remove-test-window)

3734

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

3735

# run-tests-in-test-buffer:

3736

# (lambda (dir &optional extra)

3737

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

3738

# (setq buffer-read-only nil

3739

# default-directory dir)

3740

# (erase-buffer)

3741

# (compilation-mode))

3742

# (let ((process-result

3743

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

3744

# (process-file-shell-command

3745

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

3746

# (and (numberp process-result)

3747

# (= process-result 0))))

3748

# get-command-line:

3749

# (lambda (&optional extra)

3750

# (let ((quoted-script

3751

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

3752

# (format

3753

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

3754

# quoted-script)))

3755

# get-script-name:

3756

# (lambda ()

3757

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

3758

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

3759

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

3760

# (buffer-file-name))))

3761

# remove-test-window:

3762

# (lambda ()

3763

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

3764

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

3765

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

3766

# (lambda ()

3767

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

3768

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

3769

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

3770

# (display-buffer-overriding-action

3771

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

3772

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

3773

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

3774

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

3775

# eval:

3776

# (progn

3777

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

3778

# (funcall run-tests t)))

3779

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

3780

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

3781

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

3782

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

3783

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

3784

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

3785

# End: