/mandos/trunk : revision 1265

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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 = "1.7.20"

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version = "1.8.15"

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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:

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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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489

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

497

== "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)

501

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

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

498

525

"""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."""

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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

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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

963

1009

self.last_enabled = None

964

1010

self.expires = None

965

1011

966

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

967

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

968

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

1012

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

1013

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

1014

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

969

1015

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

970

1016

datetime.datetime.utcnow())

971

1017

1010

1056

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

1011

1057

return False

1012

1058

if not quiet:

1013

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

1059

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

1014

1060

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

1015

1061

GLib.source_remove(self.disable_initiator_tag)

1016

1062

self.disable_initiator_tag = None

1034

1080

if self.checker_initiator_tag is not None:

1035

1081

GLib.source_remove(self.checker_initiator_tag)

1036

1082

self.checker_initiator_tag = GLib.timeout_add(

1037

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

1083

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

1084

+ 1)),

1038

1085

self.start_checker)

1039

1086

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

1040

1087

if self.disable_initiator_tag is not None:

1047

1094

def checker_callback(self, source, condition, connection,

1048

1095

command):

1049

1096

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

1050

self.checker_callback_tag = None

1051

self.checker = None

1052

1097

# Read return code from connection (see call_pipe)

1053

1098

returncode = connection.recv()

1054

1099

connection.close()

1100

if self.checker is not None:

1101

self.checker.join()

1102

self.checker_callback_tag = None

1103

self.checker = None

1055

1104

1056

1105

if returncode >= 0:

1057

1106

self.last_checker_status = returncode

1058

1107

self.last_checker_signal = None

1059

1108

if self.last_checker_status == 0:

1060

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

1061

vars(self))

1109

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

1062

1110

self.checked_ok()

1063

1111

else:

1064

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

1112

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

1065

1113

else:

1066

1114

self.last_checker_status = -1

1067

1115

self.last_checker_signal = -returncode

1068

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

1069

vars(self))

1116

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

1070

1117

return False

1071

1118

1072

1119

def checked_ok(self):

1106

1153

# should be.

1107

1154

1108

1155

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

1109

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

1156

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

1110

1157

self.checker.join()

1111

1158

self.checker = None

1112

1159

# Start a new checker if needed

1113

1160

if self.checker is None:

1114

1161

# Escape attributes for the shell

1115

1162

escaped_attrs = {

1116

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

1163

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

1117

1164

for attr in self.runtime_expansions}

1118

1165

try:

1119

1166

command = self.checker_command % escaped_attrs

1120

1167

except TypeError as error:

1121

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

1122

self.checker_command,

1123

exc_info=error)

1168

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

1169

self.checker_command, exc_info=error)

1124

1170

return True # Try again later

1125

1171

self.current_checker_command = command

1126

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

1127

self.name)

1172

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

1128

1173

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

1129

1174

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

1130

1175

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

1146

1191

kwargs=popen_args)

1147

1192

self.checker.start()

1148

1193

self.checker_callback_tag = GLib.io_add_watch(

1149

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

1194

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

1195

GLib.PRIORITY_DEFAULT, GLib.IO_IN,

1150

1196

self.checker_callback, pipe[0], command)

1151

1197

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

1152

1198

return True

1158

1204

self.checker_callback_tag = None

1159

1205

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

1160

1206

return

1161

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

1207

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

1162

1208

self.checker.terminate()

1163

1209

self.checker = None

1164

1210

1191

1237

func._dbus_name = func.__name__

1192

1238

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

1193

1239

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

1194

func._dbus_get_args_options = {'byte_arrays': byte_arrays}

1240

func._dbus_get_args_options = {"byte_arrays": byte_arrays}

1195

1241

return func

1196

1242

1197

1243

return decorator

1286

1332

1287

1333

@dbus.service.method(dbus.INTROSPECTABLE_IFACE,

1288

1334

out_signature="s",

1289

path_keyword='object_path',

1290

connection_keyword='connection')

1335

path_keyword="object_path",

1336

connection_keyword="connection")

1291

1337

def Introspect(self, object_path, connection):

1292

1338

"""Overloading of standard D-Bus method.

1293

1339

1342

1388

document.unlink()

1343

1389

except (AttributeError, xml.dom.DOMException,

1344

1390

xml.parsers.expat.ExpatError) as error:

1345

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

1346

exc_info=error)

1391

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

1392

exc_info=error)

1347

1393

return xmlstring

1348

1394

1349

1395

1407

1453

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

1408

1454

"'ay' signature {!r}"

1409

1455

.format(prop._dbus_signature))

1410

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

1411

for byte in value))

1456

value = dbus.ByteArray(bytes(value))

1412

1457

prop(value)

1413

1458

1414

1459

@dbus.service.method(dbus.PROPERTIES_IFACE,

1447

1492

1448

1493

@dbus.service.method(dbus.INTROSPECTABLE_IFACE,

1449

1494

out_signature="s",

1450

path_keyword='object_path',

1451

connection_keyword='connection')

1495

path_keyword="object_path",

1496

connection_keyword="connection")

1452

1497

def Introspect(self, object_path, connection):

1453

1498

"""Overloading of standard D-Bus method.

1454

1499

1510

1555

document.unlink()

1511

1556

except (AttributeError, xml.dom.DOMException,

1512

1557

xml.parsers.expat.ExpatError) as error:

1513

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

1514

exc_info=error)

1558

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

1559

exc_info=error)

1515

1560

return xmlstring

1516

1561

1517

1562

1549

1594

1550

1595

@dbus.service.method(dbus.INTROSPECTABLE_IFACE,

1551

1596

out_signature="s",

1552

path_keyword='object_path',

1553

connection_keyword='connection')

1597

path_keyword="object_path",

1598

connection_keyword="connection")

1554

1599

def Introspect(self, object_path, connection):

1555

1600

"""Overloading of standard D-Bus method.

1556

1601

1581

1626

document.unlink()

1582

1627

except (AttributeError, xml.dom.DOMException,

1583

1628

xml.parsers.expat.ExpatError) as error:

1584

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

1585

exc_info=error)

1629

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

1630

exc_info=error)

1586

1631

return xmlstring

1587

1632

1588

1633

2219

2264

del _interface

2220

2265

2221

2266

2222

class ProxyClient(object):

2267

class ProxyClient:

2223

2268

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

2224

2269

self._pipe = child_pipe

2225

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

2270

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

2226

2271

if not self._pipe.recv():

2227

2272

raise KeyError(key_id or fpr)

2228

2273

2229

2274

def __getattribute__(self, name):

2230

if name == '_pipe':

2275

if name == "_pipe":

2231

2276

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

2232

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

2277

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

2233

2278

data = self._pipe.recv()

2234

if data[0] == 'data':

2279

if data[0] == "data":

2235

2280

return data[1]

2236

if data[0] == 'function':

2281

if data[0] == "function":

2237

2282

2238

2283

def func(*args, **kwargs):

2239

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

2284

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

2240

2285

return self._pipe.recv()[1]

2241

2286

2242

2287

return func

2243

2288

2244

2289

def __setattr__(self, name, value):

2245

if name == '_pipe':

2290

if name == "_pipe":

2246

2291

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

2247

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

2292

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

2248

2293

2249

2294

2250

2295

class ClientHandler(socketserver.BaseRequestHandler, object):

2255

2300

2256

2301

def handle(self):

2257

2302

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())

2303

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

2304

str(self.client_address))

2305

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

2262

2306

2263

2307

session = gnutls.ClientSession(self.request)

2264

2308

2265

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

2309

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

2266

2310

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

2267

2311

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

2268

2312

# "+DHE-DSS"))

2270

2314

priority = self.server.gnutls_priority

2271

2315

if priority is None:

2272

2316

priority = "NORMAL"

2273

gnutls.priority_set_direct(session._c_object,

2274

priority.encode("utf-8"),

2275

None)

2317

gnutls.priority_set_direct(session,

2318

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

2276

2319

2277

2320

# Start communication using the Mandos protocol

2278

2321

# Get protocol number

2279

2322

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

2280

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

2323

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

2281

2324

try:

2282

2325

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

2283

2326

raise RuntimeError(line)

2284

2327

except (ValueError, IndexError, RuntimeError) as error:

2285

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

2328

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

2286

2329

return

2287

2330

2288

2331

# Start GnuTLS connection

2289

2332

try:

2290

2333

session.handshake()

2291

2334

except gnutls.Error as error:

2292

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

2335

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

2293

2336

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

2294

2337

# established. Just abandon the request.

2295

2338

return

2296

logger.debug("Handshake succeeded")

2339

log.debug("Handshake succeeded")

2297

2340

2298

2341

approval_required = False

2299

2342

try:

2300

2343

if gnutls.has_rawpk:

2301

fpr = ""

2344

fpr = b""

2302

2345

try:

2303

2346

key_id = self.key_id(

2304

2347

self.peer_certificate(session))

2305

2348

except (TypeError, gnutls.Error) as error:

2306

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

2349

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

2307

2350

return

2308

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

2351

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

2352

key_id.decode("utf-8",

2353

errors="replace"))

2309

2354

2310

2355

else:

2311

key_id = ""

2356

key_id = b""

2312

2357

try:

2313

2358

fpr = self.fingerprint(

2314

2359

self.peer_certificate(session))

2315

2360

except (TypeError, gnutls.Error) as error:

2316

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

2361

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

2317

2362

return

2318

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

2363

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

2319

2364

2320

2365

try:

2321

2366

client = ProxyClient(child_pipe, key_id, fpr,

2330

2375

2331

2376

while True:

2332

2377

if not client.enabled:

2333

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

2334

client.name)

2378

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

2335

2379

if self.server.use_dbus:

2336

2380

# Emit D-Bus signal

2337

2381

client.Rejected("Disabled")

2341

2385

# We are approved or approval is disabled

2342

2386

break

2343

2387

elif client.approved is None:

2344

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

2345

client.name)

2388

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

2389

client.name)

2346

2390

if self.server.use_dbus:

2347

2391

# Emit D-Bus signal

2348

2392

client.NeedApproval(

2349

2393

client.approval_delay.total_seconds()

2350

2394

* 1000, client.approved_by_default)

2351

2395

else:

2352

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

2353

client.name)

2396

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

2397

client.name)

2354

2398

if self.server.use_dbus:

2355

2399

# Emit D-Bus signal

2356

2400

client.Rejected("Denied")

2364

2408

time2 = datetime.datetime.now()

2365

2409

if (time2 - time) >= delay:

2366

2410

if not client.approved_by_default:

2367

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

2368

" waiting for approval",

2369

client.name)

2411

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

2412

" waiting for approval",

2413

client.name)

2370

2414

if self.server.use_dbus:

2371

2415

# Emit D-Bus signal

2372

2416

client.Rejected("Approval timed out")

2379

2423

try:

2380

2424

session.send(client.secret)

2381

2425

except gnutls.Error as error:

2382

logger.warning("gnutls send failed",

2383

exc_info=error)

2426

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

2384

2427

return

2385

2428

2386

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

2429

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

2387

2430

# bump the timeout using extended_timeout

2388

2431

client.bump_timeout(client.extended_timeout)

2389

2432

if self.server.use_dbus:

2396

2439

try:

2397

2440

session.bye()

2398

2441

except gnutls.Error as error:

2399

logger.warning("GnuTLS bye failed",

2400

exc_info=error)

2442

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

2401

2443

2402

2444

@staticmethod

2403

2445

def peer_certificate(session):

2404

2446

"Return the peer's certificate as a bytestring"

2405

2447

try:

2406

cert_type = gnutls.certificate_type_get2(session._c_object,

2407

gnutls.CTYPE_PEERS)

2448

cert_type = gnutls.certificate_type_get2(

2449

session, gnutls.CTYPE_PEERS)

2408

2450

except AttributeError:

2409

cert_type = gnutls.certificate_type_get(session._c_object)

2451

cert_type = gnutls.certificate_type_get(session)

2410

2452

if gnutls.has_rawpk:

2411

2453

valid_cert_types = frozenset((gnutls.CRT_RAWPK,))

2412

2454

else:

2413

2455

valid_cert_types = frozenset((gnutls.CRT_OPENPGP,))

2414

2456

# If not a valid certificate type...

2415

2457

if cert_type not in valid_cert_types:

2416

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

2417

valid_cert_types)

2458

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

2459

valid_cert_types)

2418

2460

# ...return invalid data

2419

2461

return b""

2420

2462

list_size = ctypes.c_uint(1)

2421

2463

cert_list = (gnutls.certificate_get_peers

2422

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

2464

(session, ctypes.byref(list_size)))

2423

2465

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

2424

2466

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

2425

2467

if list_size.value == 0:

2447

2489

buf = ctypes.create_string_buffer(32)

2448

2490

buf_len = ctypes.c_size_t(len(buf))

2449

2491

# 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))

2492

gnutls.pubkey_get_key_id(

2493

pubkey,

2494

gnutls.KEYID_USE_SHA256,

2495

ctypes.cast(ctypes.byref(buf),

2496

ctypes.POINTER(ctypes.c_ubyte)),

2497

ctypes.byref(buf_len))

2455

2498

# Deinit the certificate

2456

2499

gnutls.pubkey_deinit(pubkey)

2457

2500

2498

2541

return hex_fpr

2499

2542

2500

2543

2501

class MultiprocessingMixIn(object):

2544

class MultiprocessingMixIn:

2502

2545

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

2503

2546

2504

2547

def sub_process_main(self, request, address):

2516

2559

return proc

2517

2560

2518

2561

2519

class MultiprocessingMixInWithPipe(MultiprocessingMixIn, object):

2562

class MultiprocessingMixInWithPipe(MultiprocessingMixIn):

2520

2563

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

2521

2564

2522

2565

def process_request(self, request, client_address):

2537

2580

2538

2581

2539

2582

class IPv6_TCPServer(MultiprocessingMixInWithPipe,

2540

socketserver.TCPServer, object):

2541

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

2583

socketserver.TCPServer):

2584

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

2542

2585

2543

2586

Attributes:

2544

2587

enabled: Boolean; whether this server is activated yet

2595

2638

if SO_BINDTODEVICE is None:

2596

2639

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

2597

2640

# common enough.

2598

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

2641

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

2599

2642

SO_BINDTODEVICE = 25

2600

2643

try:

2601

2644

self.socket.setsockopt(

2603

2646

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

2604

2647

except socket.error as error:

2605

2648

if error.errno == errno.EPERM:

2606

logger.error("No permission to bind to"

2607

" interface %s", self.interface)

2649

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

2650

self.interface)

2608

2651

elif error.errno == errno.ENOPROTOOPT:

2609

logger.error("SO_BINDTODEVICE not available;"

2610

" cannot bind to interface %s",

2611

self.interface)

2652

log.error("SO_BINDTODEVICE not available; cannot"

2653

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

2612

2654

elif error.errno == errno.ENODEV:

2613

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

2614

" cannot bind", self.interface)

2655

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

2656

" bind", self.interface)

2615

2657

else:

2616

2658

raise

2617

2659

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

2618

2660

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

2661

if self.server_address[1]:

2662

self.allow_reuse_address = True

2619

2663

if not self.server_address[0]:

2620

2664

if self.address_family == socket.AF_INET6:

2621

2665

any_address = "::" # in6addr_any

2674

2718

def add_pipe(self, parent_pipe, proc):

2675

2719

# Call "handle_ipc" for both data and EOF events

2676

2720

GLib.io_add_watch(

2677

parent_pipe.fileno(),

2678

GLib.IO_IN | GLib.IO_HUP,

2721

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

2722

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

2679

2723

functools.partial(self.handle_ipc,

2680

2724

parent_pipe=parent_pipe,

2681

2725

proc=proc))

2694

2738

request = parent_pipe.recv()

2695

2739

command = request[0]

2696

2740

2697

if command == 'init':

2741

if command == "init":

2698

2742

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

2699

2743

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

2700

2744

address = request[3]

2701

2745

2702

2746

for c in self.clients.values():

2747

if key_id == ("E3B0C44298FC1C149AFBF4C8996FB924"

2748

"27AE41E4649B934CA495991B7852B855"):

2749

continue

2703

2750

if key_id and c.key_id == key_id:

2704

2751

client = c

2705

2752

break

2707

2754

client = c

2708

2755

break

2709

2756

else:

2710

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

2711

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

2757

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

2758

" %s", key_id or fpr, address)

2712

2759

if self.use_dbus:

2713

2760

# Emit D-Bus signal

2714

2761

mandos_dbus_service.ClientNotFound(key_id or fpr,

2717

2764

return False

2718

2765

2719

2766

GLib.io_add_watch(

2720

parent_pipe.fileno(),

2721

GLib.IO_IN | GLib.IO_HUP,

2767

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

2768

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

2722

2769

functools.partial(self.handle_ipc,

2723

2770

parent_pipe=parent_pipe,

2724

2771

proc=proc,

2727

2774

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

2728

2775

# same fileno

2729

2776

return False

2730

if command == 'funcall':

2777

if command == "funcall":

2731

2778

funcname = request[1]

2732

2779

args = request[2]

2733

2780

kwargs = request[3]

2734

2781

2735

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

2782

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

2736

2783

funcname)(*args,

2737

2784

**kwargs)))

2738

2785

2739

if command == 'getattr':

2786

if command == "getattr":

2740

2787

attrname = request[1]

2741

2788

if isinstance(client_object.__getattribute__(attrname),

2742

collections.Callable):

2743

parent_pipe.send(('function', ))

2789

collections.abc.Callable):

2790

parent_pipe.send(("function", ))

2744

2791

else:

2745

2792

parent_pipe.send((

2746

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

2793

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

2747

2794

2748

if command == 'setattr':

2795

if command == "setattr":

2749

2796

attrname = request[1]

2750

2797

value = request[2]

2751

2798

setattr(client_object, attrname, value)

2756

2803

def rfc3339_duration_to_delta(duration):

2757

2804

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

2758

2805

2759

>>> rfc3339_duration_to_delta("P7D")

2760

datetime.timedelta(7)

2761

>>> rfc3339_duration_to_delta("PT60S")

2762

datetime.timedelta(0, 60)

2763

>>> rfc3339_duration_to_delta("PT60M")

2764

datetime.timedelta(0, 3600)

2765

>>> rfc3339_duration_to_delta("PT24H")

2766

datetime.timedelta(1)

2767

>>> rfc3339_duration_to_delta("P1W")

2768

datetime.timedelta(7)

2769

>>> rfc3339_duration_to_delta("PT5M30S")

2770

datetime.timedelta(0, 330)

2771

>>> rfc3339_duration_to_delta("P1DT3M20S")

2772

datetime.timedelta(1, 200)

2806

>>> timedelta = datetime.timedelta

2807

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

2808

True

2809

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

2810

True

2811

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

2812

True

2813

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

2814

True

2815

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

2816

True

2817

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

2818

True

2819

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

2820

True

2821

>>> del timedelta

2773

2822

"""

2774

2823

2775

2824

# Parsing an RFC 3339 duration with regular expressions is not

2855

2904

def string_to_delta(interval):

2856

2905

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

2857

2906

2858

>>> string_to_delta('7d')

2859

datetime.timedelta(7)

2860

>>> string_to_delta('60s')

2861

datetime.timedelta(0, 60)

2862

>>> string_to_delta('60m')

2863

datetime.timedelta(0, 3600)

2864

>>> string_to_delta('24h')

2865

datetime.timedelta(1)

2866

>>> string_to_delta('1w')

2867

datetime.timedelta(7)

2868

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

2869

datetime.timedelta(0, 330)

2907

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

2908

True

2909

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

2910

True

2911

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

2912

True

2913

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

2914

True

2915

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

2916

True

2917

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

2918

True

2870

2919

"""

2871

2920

2872

2921

try:

2974

3023

2975

3024

options = parser.parse_args()

2976

3025

2977

if options.check:

2978

import doctest

2979

fail_count, test_count = doctest.testmod()

2980

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

2981

2982

3026

# Default values for config file for server-global settings

2983

3027

if gnutls.has_rawpk:

2984

3028

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

3004

3048

del priority

3005

3049

3006

3050

# Parse config file for server-global settings

3007

server_config = configparser.SafeConfigParser(server_defaults)

3051

server_config = configparser.ConfigParser(server_defaults)

3008

3052

del server_defaults

3009

3053

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

3010

# Convert the SafeConfigParser object to a dict

3054

# Convert the ConfigParser object to a dict

3011

3055

server_settings = server_config.defaults()

3012

3056

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

3013

3057

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

3080

3124

3081

3125

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

3082

3126

syslogger.setFormatter(

3083

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

3084

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

3127

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

3128

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

3085

3129

server_settings["servicename"])))

3086

3130

3087

3131

# Parse config file with clients

3088

client_config = configparser.SafeConfigParser(Client

3089

.client_defaults)

3132

client_config = configparser.ConfigParser(Client.client_defaults)

3090

3133

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

3091

3134

"clients.conf"))

3092

3135

3112

3155

try:

3113

3156

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

3114

3157

except IOError as e:

3115

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

3116

exc_info=e)

3158

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

3159

exc_info=e)

3117

3160

3118

3161

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

3119

3162

("mandos", "mandos"),

3130

3173

try:

3131

3174

os.setgid(gid)

3132

3175

os.setuid(uid)

3133

if debug:

3134

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

3135

gid))

3176

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

3136

3177

except OSError as error:

3137

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

3138

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

3178

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

3179

os.strerror(error.errno))

3139

3180

if error.errno != errno.EPERM:

3140

3181

raise

3141

3182

3148

3189

3149

3190

@gnutls.log_func

3150

3191

def debug_gnutls(level, string):

3151

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

3192

log.debug("GnuTLS: %s",

3193

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

3152

3194

3153

3195

gnutls.global_set_log_function(debug_gnutls)

3154

3196

3163

3205

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

3164

3206

daemon()

3165

3207

3166

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

3167

# to inform GLib that threads will be used.

3168

GLib.threads_init()

3208

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

3209

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

3210

# need to inform GLib that threads will be used.

3211

GLib.threads_init()

3169

3212

3170

3213

global main_loop

3171

3214

# From the Avahi example code

3182

3225

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

3183

3226

do_not_queue=True)

3184

3227

except dbus.exceptions.DBusException as e:

3185

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

3228

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

3186

3229

use_dbus = False

3187

3230

server_settings["use_dbus"] = False

3188

3231

tcp_server.use_dbus = False

3247

3290

if isinstance(s, bytes)

3248

3291

else s) for s in

3249

3292

value["client_structure"]]

3250

# .name & .host

3251

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

3293

# .name, .host, and .checker_command

3294

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

3252

3295

if isinstance(value[k], bytes):

3253

3296

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

3254

if not value.has_key("key_id"):

3297

if "key_id" not in value:

3255

3298

value["key_id"] = ""

3256

elif not value.has_key("fingerprint"):

3299

elif "fingerprint" not in value:

3257

3300

value["fingerprint"] = ""

3258

3301

# old_client_settings

3259

3302

# .keys()

3264

3307

for key, value in

3265

3308

bytes_old_client_settings.items()}

3266

3309

del bytes_old_client_settings

3267

# .host

3310

# .host and .checker_command

3268

3311

for value in old_client_settings.values():

3269

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

3270

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

3271

.decode("utf-8"))

3312

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

3313

if isinstance(value[attribute], bytes):

3314

value[attribute] = (value[attribute]

3315

.decode("utf-8"))

3272

3316

os.remove(stored_state_path)

3273

3317

except IOError as e:

3274

3318

if e.errno == errno.ENOENT:

3275

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

3276

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

3319

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

3320

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

3277

3321

else:

3278

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

3279

exc_info=e)

3322

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

3323

exc_info=e)

3280

3324

raise

3281

3325

except EOFError as e:

3282

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

3283

"EOFError:",

3284

exc_info=e)

3326

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

3327

exc_info=e)

3285

3328

3286

3329

with PGPEngine() as pgp:

3287

3330

for client_name, client in clients_data.items():

3314

3357

if client["enabled"]:

3315

3358

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

3316

3359

if not client["last_checked_ok"]:

3317

logger.warning(

3318

"disabling client {} - Client never "

3319

"performed a successful checker".format(

3320

client_name))

3360

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

3361

" never performed a successful"

3362

" checker", client_name)

3321

3363

client["enabled"] = False

3322

3364

elif client["last_checker_status"] != 0:

3323

logger.warning(

3324

"disabling client {} - Client last"

3325

" checker failed with error code"

3326

" {}".format(

3327

client_name,

3328

client["last_checker_status"]))

3365

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

3366

" last checker failed with error"

3367

" code %s", client_name,

3368

client["last_checker_status"])

3329

3369

client["enabled"] = False

3330

3370

else:

3331

3371

client["expires"] = (

3332

3372

datetime.datetime.utcnow()

3333

3373

+ client["timeout"])

3334

logger.debug("Last checker succeeded,"

3335

" keeping {} enabled".format(

3336

client_name))

3374

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

3375

" enabled", client_name)

3337

3376

try:

3338

3377

client["secret"] = pgp.decrypt(

3339

3378

client["encrypted_secret"],

3340

3379

client_settings[client_name]["secret"])

3341

3380

except PGPError:

3342

3381

# If decryption fails, we use secret from new settings

3343

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

3344

client_name))

3382

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

3383

client_name)

3345

3384

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

3346

3385

["secret"])

3347

3386

3361

3400

server_settings=server_settings)

3362

3401

3363

3402

if not tcp_server.clients:

3364

logger.warning("No clients defined")

3403

log.warning("No clients defined")

3365

3404

3366

3405

if not foreground:

3367

3406

if pidfile is not None:

3370

3409

with pidfile:

3371

3410

print(pid, file=pidfile)

3372

3411

except IOError:

3373

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

3374

pidfilename, pid)

3412

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

3413

pidfilename, pid)

3375

3414

del pidfile

3376

3415

del pidfilename

3377

3416

3527

3566

3528

3567

try:

3529

3568

with tempfile.NamedTemporaryFile(

3530

mode='wb',

3569

mode="wb",

3531

3570

suffix=".pickle",

3532

prefix='clients-',

3571

prefix="clients-",

3533

3572

dir=os.path.dirname(stored_state_path),

3534

3573

delete=False) as stored_state:

3535

3574

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

3543

3582

except NameError:

3544

3583

pass

3545

3584

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

3546

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

3547

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

3585

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

3586

os.strerror(e.errno))

3548

3587

else:

3549

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

3550

exc_info=e)

3588

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

3589

exc_info=e)

3551

3590

raise

3552

3591

3553

3592

# Delete all clients, and settings from config

3579

3618

if zeroconf:

3580

3619

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

3581

3620

if use_ipv6:

3582

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

3583

" flowinfo %d, scope_id %d",

3584

*tcp_server.socket.getsockname())

3621

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

3622

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

3585

3623

else: # IPv4

3586

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

3587

*tcp_server.socket.getsockname())

3624

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

3625

*tcp_server.socket.getsockname())

3588

3626

3589

3627

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

3590

3628

3594

3632

try:

3595

3633

service.activate()

3596

3634

except dbus.exceptions.DBusException as error:

3597

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

3635

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

3598

3636

cleanup()

3599

3637

sys.exit(1)

3600

3638

# End of Avahi example code

3601

3639

3602

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

3603

lambda *args, **kwargs:

3604

(tcp_server.handle_request

3605

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

3640

GLib.io_add_watch(

3641

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

3642

GLib.PRIORITY_DEFAULT, GLib.IO_IN,

3643

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

3644

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

3606

3645

3607

logger.debug("Starting main loop")

3646

log.debug("Starting main loop")

3608

3647

main_loop.run()

3609

3648

except AvahiError as error:

3610

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

3649

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

3611

3650

cleanup()

3612

3651

sys.exit(1)

3613

3652

except KeyboardInterrupt:

3614

3653

if debug:

3615

3654

print("", file=sys.stderr)

3616

logger.debug("Server received KeyboardInterrupt")

3617

logger.debug("Server exiting")

3655

log.debug("Server received KeyboardInterrupt")

3656

log.debug("Server exiting")

3618

3657

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

3619

3658

cleanup()

3620

3659

3621

3622

if __name__ == '__main__':

3623

main()

3660

3661

def parse_test_args():

3662

# type: () -> argparse.Namespace

3663

parser = argparse.ArgumentParser(add_help=False)

3664

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

3665

parser.add_argument("--prefix", )

3666

args, unknown_args = parser.parse_known_args()

3667

if args.check:

3668

# Remove test options from sys.argv

3669

sys.argv[1:] = unknown_args

3670

return args

3671

3672

# Add all tests from doctest strings

3673

def load_tests(loader, tests, none):

3674

import doctest

3675

tests.addTests(doctest.DocTestSuite())

3676

return tests

3677

3678

if __name__ == "__main__":

3679

options = parse_test_args()

3680

try:

3681

if options.check:

3682

extra_test_prefix = options.prefix

3683

if extra_test_prefix is not None:

3684

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

3685

.result.wasSuccessful()):

3686

sys.exit(1)

3687

class ExtraTestLoader(unittest.TestLoader):

3688

testMethodPrefix = extra_test_prefix

3689

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

3690

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

3691

else:

3692

unittest.main(argv=[""])

3693

else:

3694

main()

3695

finally:

3696

logging.shutdown()

3697

3698

# Local Variables:

3699

# run-tests:

3700

# (lambda (&optional extra)

3701

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

3702

# extra))

3703

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

3704

# (funcall remove-test-window)

3705

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

3706

# run-tests-in-test-buffer:

3707

# (lambda (dir &optional extra)

3708

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

3709

# (setq buffer-read-only nil

3710

# default-directory dir)

3711

# (erase-buffer)

3712

# (compilation-mode))

3713

# (let ((process-result

3714

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

3715

# (process-file-shell-command

3716

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

3717

# (and (numberp process-result)

3718

# (= process-result 0))))

3719

# get-command-line:

3720

# (lambda (&optional extra)

3721

# (let ((quoted-script

3722

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

3723

# (format

3724

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

3725

# quoted-script)))

3726

# get-script-name:

3727

# (lambda ()

3728

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

3729

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

3730

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

3731

# (buffer-file-name))))

3732

# remove-test-window:

3733

# (lambda ()

3734

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

3735

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

3736

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

3737

# (lambda ()

3738

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

3739

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

3740

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

3741

# (display-buffer-overriding-action

3742

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

3743

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

3744

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

3745

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

3746

# eval:

3747

# (progn

3748

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

3749

# (funcall run-tests t)))

3750

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

3751

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

3752

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

3753

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

3754

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

3755

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

3756

# End: