/mandos/release : revision 237.7.394

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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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#!/usr/bin/python

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

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#

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

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#

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#

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# This program is partly derived from an example program for an Avahi

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# service publisher, downloaded from

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# <http://avahi.org/wiki/PythonPublishExample>. This includes the

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# methods "add", "remove", "server_state_changed",

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# "entry_group_state_changed", "cleanup", and "activate" in the

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

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#

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#

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# Everything else is

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15

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#

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# This file is part of Mandos.

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#

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# Mandos is free software: you can redistribute it and/or modify it

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# under the terms of the GNU General Public License as published by

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15

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#

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# This program is free software: you can redistribute it and/or modify

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# it under the terms of the GNU General Public License as published by

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# the Free Software Foundation, either version 3 of the License, or

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# (at your option) any later version.

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#

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# Mandos is distributed in the hope that it will be useful, but

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# WITHOUT ANY WARRANTY; without even the implied warranty of

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# This program is distributed in the hope that it will be useful,

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# but WITHOUT ANY WARRANTY; without even the implied warranty of

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# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the

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# GNU General Public License for more details.

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#

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#

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# You should have received a copy of the GNU General Public License

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# along with Mandos. If not, see <http://www.gnu.org/licenses/>.

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#

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# along with this program. If not, see

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# <http://www.gnu.org/licenses/>.

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#

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

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#

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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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42

try:

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import SocketServer as socketserver

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44

except ImportError:

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45

import socketserver

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46

import socket

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import argparse

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48

import datetime

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49

import errno

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50

try:

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51

import ConfigParser as configparser

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52

except ImportError:

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import configparser

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import sys

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55

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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78

import codecs

80

import random

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import shlex

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79

83

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import dbus

84

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import dbus.service

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import gi

86

82

from gi.repository import GLib

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from dbus.mainloop.glib import DBusGMainLoop

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import ctypes

90

86

import xml.dom.minidom

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import inspect

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88

93

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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98

# 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

110

except AttributeError:

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shlex.quote = re.escape

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113

# Add os.set_inheritable if it does not exist

114

try:

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os.set_inheritable

116

except AttributeError:

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def set_inheritable(fd, inheritable):

118

flags = fcntl.fcntl(fd, fcntl.F_GETFD)

119

if inheritable and ((flags & fcntl.FD_CLOEXEC) != 0):

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fcntl.fcntl(fd, fcntl.F_SETFL, flags & ~fcntl.FD_CLOEXEC)

121

elif (not inheritable) and ((flags & fcntl.FD_CLOEXEC) == 0):

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fcntl.fcntl(fd, fcntl.F_SETFL, flags | fcntl.FD_CLOEXEC)

123

os.set_inheritable = set_inheritable

124

del set_inheritable

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126

# Show warnings by default

127

if not sys.warnoptions:

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import warnings

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warnings.simplefilter("default")

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131

# 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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# newer, and it is also the most natural place for it:

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try:

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90

SO_BINDTODEVICE = socket.SO_BINDTODEVICE

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91

except AttributeError:

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92

try:

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# This is where SO_BINDTODEVICE was up to and including Python

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# 2.6, and also 3.2:

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93

from IN import SO_BINDTODEVICE

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except ImportError:

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# In Python 2.7 it seems to have been removed entirely.

143

# Try running the C preprocessor:

144

try:

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cc = subprocess.Popen(["cc", "--language=c", "-E",

146

"/dev/stdin"],

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stdin=subprocess.PIPE,

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stdout=subprocess.PIPE)

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stdout = cc.communicate(

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"#include <sys/socket.h>\nSO_BINDTODEVICE\n")[0]

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SO_BINDTODEVICE = int(stdout.splitlines()[-1])

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except (OSError, ValueError, IndexError):

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# No value found

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SO_BINDTODEVICE = None

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if sys.version_info < (3, 2):

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configparser.Configparser = configparser.SafeConfigParser

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159

version = "1.8.17"

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SO_BINDTODEVICE = None

96

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if sys.version_info.major == 2:

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str = unicode

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version = "1.7.7"

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101

stored_state_file = "clients.pickle"

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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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logger = logging.getLogger()

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syslogger = None

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105

166

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try:

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if_nametoindex = ctypes.cdll.LoadLibrary(

168

108

ctypes.util.find_library("c")).if_nametoindex

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except (OSError, AttributeError):

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110

171

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def if_nametoindex(interface):

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"Get an interface index the hard way, i.e. using fcntl()"

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SIOCGIFINDEX = 0x8933 # From /usr/include/linux/sockios.h

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136

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def initlogger(debug, level=logging.WARNING):

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"""init logger and add loglevel"""

199

139

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global syslogger

201

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syslogger = (logging.handlers.SysLogHandler(

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facility=logging.handlers.SysLogHandler.LOG_DAEMON,

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address="/dev/log"))

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facility = logging.handlers.SysLogHandler.LOG_DAEMON,

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address = "/dev/log"))

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syslogger.setFormatter(logging.Formatter

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

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" %(message)s"))

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log.addHandler(syslogger)

208

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

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' %(message)s'))

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logger.addHandler(syslogger)

148

209

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if debug:

210

150

console = logging.StreamHandler()

211

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"))

215

log.addHandler(console)

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log.setLevel(level)

151

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)

217

157

218

158

219

159

class PGPError(Exception):

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pass

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162

223

163

224

class PGPEngine:

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class PGPEngine(object):

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

226

166

227

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def __init__(self):

228

168

self.tempdir = tempfile.mkdtemp(prefix="mandos-")

229

169

self.gpg = "gpg"

231

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

232

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for line in output.splitlines():

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

234

if name == b"gpg":

174

if name == "gpg":

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self.gpg = path

236

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break

237

177

except OSError as e:

238

178

if e.errno != errno.ENOENT:

239

179

raise

240

self.gnupgargs = ["--batch",

241

"--homedir", self.tempdir,

242

"--force-mdc",

243

"--quiet"]

244

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

245

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

246

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

247

180

self.gnupgargs = ['--batch',

181

'--homedir', self.tempdir,

182

'--force-mdc',

183

'--quiet',

184

'--no-use-agent']

185

248

186

def __enter__(self):

249

187

return self

250

188

251

189

def __exit__(self, exc_type, exc_value, traceback):

252

190

self._cleanup()

253

191

return False

254

192

255

193

def __del__(self):

256

194

self._cleanup()

257

195

258

196

def _cleanup(self):

259

197

if self.tempdir is not None:

260

198

# Delete contents of tempdir

261

199

for root, dirs, files in os.walk(self.tempdir,

262

topdown=False):

200

topdown = False):

263

201

for filename in files:

264

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os.remove(os.path.join(root, filename))

265

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for dirname in dirs:

267

205

# Remove tempdir

268

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os.rmdir(self.tempdir)

269

207

self.tempdir = None

270

208

271

209

def password_encode(self, password):

272

210

# Passphrase can not be empty and can not contain newlines or

273

211

# NUL bytes. So we prefix it and hex encode it.

278

216

.replace(b"\n", b"\\n")

279

217

.replace(b"\0", b"\\x00"))

280

218

return encoded

281

219

282

220

def encrypt(self, data, password):

283

221

passphrase = self.password_encode(password)

284

222

with tempfile.NamedTemporaryFile(

285

223

dir=self.tempdir) as passfile:

286

224

passfile.write(passphrase)

287

225

passfile.flush()

288

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

289

"--passphrase-file",

226

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

227

'--passphrase-file',

290

228

passfile.name]

291

229

+ self.gnupgargs,

292

stdin=subprocess.PIPE,

293

stdout=subprocess.PIPE,

294

stderr=subprocess.PIPE)

295

ciphertext, err = proc.communicate(input=data)

230

stdin = subprocess.PIPE,

231

stdout = subprocess.PIPE,

232

stderr = subprocess.PIPE)

233

ciphertext, err = proc.communicate(input = data)

296

234

if proc.returncode != 0:

297

235

raise PGPError(err)

298

236

return ciphertext

299

237

300

238

def decrypt(self, data, password):

301

239

passphrase = self.password_encode(password)

302

240

with tempfile.NamedTemporaryFile(

303

dir=self.tempdir) as passfile:

241

dir = self.tempdir) as passfile:

304

242

passfile.write(passphrase)

305

243

passfile.flush()

306

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

307

"--passphrase-file",

244

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

245

'--passphrase-file',

308

246

passfile.name]

309

247

+ self.gnupgargs,

310

stdin=subprocess.PIPE,

311

stdout=subprocess.PIPE,

312

stderr=subprocess.PIPE)

313

decrypted_plaintext, err = proc.communicate(input=data)

248

stdin = subprocess.PIPE,

249

stdout = subprocess.PIPE,

250

stderr = subprocess.PIPE)

251

decrypted_plaintext, err = proc.communicate(input = data)

314

252

if proc.returncode != 0:

315

253

raise PGPError(err)

316

254

return decrypted_plaintext

317

255

318

319

256

# Pretend that we have an Avahi module

320

class avahi:

321

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

322

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

323

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

324

PROTO_INET = 0 # avahi-common/address.h

325

PROTO_INET6 = 1 # avahi-common/address.h

257

class Avahi(object):

258

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

259

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

260

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

261

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

262

PROTO_INET = 0 # avahi-common/address.h

263

PROTO_INET6 = 1 # avahi-common/address.h

326

264

DBUS_NAME = "org.freedesktop.Avahi"

327

265

DBUS_INTERFACE_ENTRY_GROUP = DBUS_NAME + ".EntryGroup"

328

266

DBUS_INTERFACE_SERVER = DBUS_NAME + ".Server"

329

267

DBUS_PATH_SERVER = "/"

330

331

@staticmethod

332

def string_array_to_txt_array(t):

268

def string_array_to_txt_array(self, t):

333

269

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

334

270

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

335

ENTRY_GROUP_ESTABLISHED = 2 # avahi-common/defs.h

336

ENTRY_GROUP_COLLISION = 3 # avahi-common/defs.h

337

ENTRY_GROUP_FAILURE = 4 # avahi-common/defs.h

338

SERVER_INVALID = 0 # avahi-common/defs.h

339

SERVER_REGISTERING = 1 # avahi-common/defs.h

340

SERVER_RUNNING = 2 # avahi-common/defs.h

341

SERVER_COLLISION = 3 # avahi-common/defs.h

342

SERVER_FAILURE = 4 # avahi-common/defs.h

343

271

ENTRY_GROUP_ESTABLISHED = 2 # avahi-common/defs.h

272

ENTRY_GROUP_COLLISION = 3 # avahi-common/defs.h

273

ENTRY_GROUP_FAILURE = 4 # avahi-common/defs.h

274

SERVER_INVALID = 0 # avahi-common/defs.h

275

SERVER_REGISTERING = 1 # avahi-common/defs.h

276

SERVER_RUNNING = 2 # avahi-common/defs.h

277

SERVER_COLLISION = 3 # avahi-common/defs.h

278

SERVER_FAILURE = 4 # avahi-common/defs.h

279

avahi = Avahi()

344

280

345

281

class AvahiError(Exception):

346

282

def __init__(self, value, *args, **kwargs):

357

293

pass

358

294

359

295

360

class AvahiService:

296

class AvahiService(object):

361

297

"""An Avahi (Zeroconf) service.

362

298

363

299

Attributes:

364

300

interface: integer; avahi.IF_UNSPEC or an interface index.

365

301

Used to optionally bind to the specified interface.

366

name: string; Example: "Mandos"

367

type: string; Example: "_mandos._tcp".

302

name: string; Example: 'Mandos'

303

type: string; Example: '_mandos._tcp'.

368

304

See <https://www.iana.org/assignments/service-names-port-numbers>

369

305

port: integer; what port to announce

370

306

TXT: list of strings; TXT record for the service

377

313

server: D-Bus Server

378

314

bus: dbus.SystemBus()

379

315

"""

380

316

381

317

def __init__(self,

382

interface=avahi.IF_UNSPEC,

383

name=None,

384

servicetype=None,

385

port=None,

386

TXT=None,

387

domain="",

388

host="",

389

max_renames=32768,

390

protocol=avahi.PROTO_UNSPEC,

391

bus=None):

318

interface = avahi.IF_UNSPEC,

319

name = None,

320

servicetype = None,

321

port = None,

322

TXT = None,

323

domain = "",

324

host = "",

325

max_renames = 32768,

326

protocol = avahi.PROTO_UNSPEC,

327

bus = None):

392

328

self.interface = interface

393

329

self.name = name

394

330

self.type = servicetype

403

339

self.server = None

404

340

self.bus = bus

405

341

self.entry_group_state_changed_match = None

406

342

407

343

def rename(self, remove=True):

408

344

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

409

345

if self.rename_count >= self.max_renames:

410

log.critical("No suitable Zeroconf service name found"

411

" after %i retries, exiting.",

412

self.rename_count)

346

logger.critical("No suitable Zeroconf service name found"

347

" after %i retries, exiting.",

348

self.rename_count)

413

349

raise AvahiServiceError("Too many renames")

414

350

self.name = str(

415

351

self.server.GetAlternativeServiceName(self.name))

416

352

self.rename_count += 1

417

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

418

self.name)

353

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

354

self.name)

419

355

if remove:

420

356

self.remove()

421

357

try:

423

359

except dbus.exceptions.DBusException as error:

424

360

if (error.get_dbus_name()

425

361

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

426

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

362

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

427

363

return self.rename(remove=False)

428

364

else:

429

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

365

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

430

366

self.cleanup()

431

367

os._exit(1)

432

368

433

369

def remove(self):

434

370

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

435

371

if self.entry_group_state_changed_match is not None:

437

373

self.entry_group_state_changed_match = None

438

374

if self.group is not None:

439

375

self.group.Reset()

440

376

441

377

def add(self):

442

378

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

443

379

self.remove()

448

384

avahi.DBUS_INTERFACE_ENTRY_GROUP)

449

385

self.entry_group_state_changed_match = (

450

386

self.group.connect_to_signal(

451

"StateChanged", self.entry_group_state_changed))

452

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

453

self.name, self.type)

387

'StateChanged', self.entry_group_state_changed))

388

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

389

self.name, self.type)

454

390

self.group.AddService(

455

391

self.interface,

456

392

self.protocol,

460

396

dbus.UInt16(self.port),

461

397

avahi.string_array_to_txt_array(self.TXT))

462

398

self.group.Commit()

463

399

464

400

def entry_group_state_changed(self, state, error):

465

401

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

466

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

467

402

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

403

468

404

if state == avahi.ENTRY_GROUP_ESTABLISHED:

469

log.debug("Zeroconf service established.")

405

logger.debug("Zeroconf service established.")

470

406

elif state == avahi.ENTRY_GROUP_COLLISION:

471

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

407

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

472

408

self.rename()

473

409

elif state == avahi.ENTRY_GROUP_FAILURE:

474

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

475

str(error))

410

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

411

str(error))

476

412

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

477

413

478

414

def cleanup(self):

479

415

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

480

416

if self.group is not None:

485

421

pass

486

422

self.group = None

487

423

self.remove()

488

424

489

425

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

490

426

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

491

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

427

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

492

428

bad_states = {

493

429

avahi.SERVER_INVALID: "Zeroconf server invalid",

494

430

avahi.SERVER_REGISTERING: None,

498

434

if state in bad_states:

499

435

if bad_states[state] is not None:

500

436

if error is None:

501

log.error(bad_states[state])

437

logger.error(bad_states[state])

502

438

else:

503

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

439

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

504

440

self.cleanup()

505

441

elif state == avahi.SERVER_RUNNING:

506

442

try:

508

444

except dbus.exceptions.DBusException as error:

509

445

if (error.get_dbus_name()

510

446

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

511

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

447

logger.info("Local Zeroconf service name"

448

" collision.")

512

449

return self.rename(remove=False)

513

450

else:

514

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

451

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

515

452

self.cleanup()

516

453

os._exit(1)

517

454

else:

518

455

if error is None:

519

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

456

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

520

457

else:

521

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

522

458

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

459

523

460

def activate(self):

524

461

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

525

462

if self.server is None:

536

473

class AvahiServiceToSyslog(AvahiService):

537

474

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

538

475

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

539

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

540

**kwargs)

476

ret = AvahiService.rename(self, *args, **kwargs)

541

477

syslogger.setFormatter(logging.Formatter(

542

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

478

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

543

479

.format(self.name)))

544

480

return ret

545

481

546

547

482

# Pretend that we have a GnuTLS module

548

class gnutls:

549

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

550

551

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

552

if library is None:

553

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

554

_library = ctypes.cdll.LoadLibrary(library)

555

del library

556

483

class GnuTLS(object):

484

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

485

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

486

487

_library = ctypes.cdll.LoadLibrary(

488

ctypes.util.find_library("gnutls"))

489

_need_version = b"3.3.0"

490

def __init__(self):

491

# Need to use class name "GnuTLS" here, since this method is

492

# called before the assignment to the "gnutls" global variable

493

# happens.

494

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

495

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

496

.format(self._need_version))

497

557

498

# Unless otherwise indicated, the constants and types below are

558

499

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

559

500

560

501

# Constants

561

502

E_SUCCESS = 0

562

503

E_INTERRUPTED = -52

563

504

E_AGAIN = -28

564

505

CRT_OPENPGP = 2

565

CRT_RAWPK = 3

566

506

CLIENT = 2

567

507

SHUT_RDWR = 0

568

508

CRD_CERTIFICATE = 1

569

509

E_NO_CERTIFICATE_FOUND = -49

570

X509_FMT_DER = 0

571

NO_TICKETS = 1<<10

572

ENABLE_RAWPK = 1<<18

573

CTYPE_PEERS = 3

574

KEYID_USE_SHA256 = 1 # gnutls/x509.h

575

510

OPENPGP_FMT_RAW = 0 # gnutls/openpgp.h

576

511

577

512

# Types

578

class _session_int(ctypes.Structure):

513

class session_int(ctypes.Structure):

579

514

_fields_ = []

580

session_t = ctypes.POINTER(_session_int)

581

515

session_t = ctypes.POINTER(session_int)

582

516

class certificate_credentials_st(ctypes.Structure):

583

517

_fields_ = []

584

518

certificate_credentials_t = ctypes.POINTER(

585

519

certificate_credentials_st)

586

520

certificate_type_t = ctypes.c_int

587

588

521

class datum_t(ctypes.Structure):

589

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

590

("size", ctypes.c_uint)]

591

592

class _openpgp_crt_int(ctypes.Structure):

522

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

523

('size', ctypes.c_uint)]

524

class openpgp_crt_int(ctypes.Structure):

593

525

_fields_ = []

594

openpgp_crt_t = ctypes.POINTER(_openpgp_crt_int)

595

openpgp_crt_fmt_t = ctypes.c_int # gnutls/openpgp.h

526

openpgp_crt_t = ctypes.POINTER(openpgp_crt_int)

527

openpgp_crt_fmt_t = ctypes.c_int # gnutls/openpgp.h

596

528

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

597

529

credentials_type_t = ctypes.c_int

598

530

transport_ptr_t = ctypes.c_void_p

599

531

close_request_t = ctypes.c_int

600

532

601

533

# Exceptions

602

534

class Error(Exception):

603

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

535

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

536

# exception might be raised from within GnuTLS.__init__,

537

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

538

# global variable has happened.

539

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

604

540

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

605

541

# code is passed, convert it to a string with

606

542

# gnutls.strerror()

607

543

self.code = code

608

544

if message is None and code is not None:

609

message = gnutls.strerror(code).decode(

610

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

611

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

545

message = GnuTLS.strerror(code)

546

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

612

547

message, *args)

613

548

614

549

class CertificateSecurityError(Error):

615

550

pass

616

617

class PointerTo:

618

def __init__(self, cls):

619

self.cls = cls

620

621

def from_param(self, obj):

622

if not isinstance(obj, self.cls):

623

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

624

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

625

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

626

627

class CastToVoidPointer:

628

def __init__(self, cls):

629

self.cls = cls

630

631

def from_param(self, obj):

632

if not isinstance(obj, self.cls):

633

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

634

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

635

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

636

637

class With_from_param:

638

@classmethod

639

def from_param(cls, obj):

640

return obj._as_parameter_

641

551

642

552

# Classes

643

class Credentials(With_from_param):

553

class Credentials(object):

644

554

def __init__(self):

645

self._as_parameter_ = gnutls.certificate_credentials_t()

646

gnutls.certificate_allocate_credentials(self)

555

self._c_object = gnutls.certificate_credentials_t()

556

gnutls.certificate_allocate_credentials(

557

ctypes.byref(self._c_object))

647

558

self.type = gnutls.CRD_CERTIFICATE

648

559

649

560

def __del__(self):

650

gnutls.certificate_free_credentials(self)

651

652

class ClientSession(With_from_param):

653

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

654

self._as_parameter_ = gnutls.session_t()

655

gnutls_flags = gnutls.CLIENT

656

if gnutls.check_version(b"3.5.6"):

657

gnutls_flags |= gnutls.NO_TICKETS

658

if gnutls.has_rawpk:

659

gnutls_flags |= gnutls.ENABLE_RAWPK

660

gnutls.init(self, gnutls_flags)

661

del gnutls_flags

662

gnutls.set_default_priority(self)

663

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

664

gnutls.handshake_set_private_extensions(self, True)

561

gnutls.certificate_free_credentials(self._c_object)

562

563

class ClientSession(object):

564

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

565

self._c_object = gnutls.session_t()

566

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

567

gnutls.set_default_priority(self._c_object)

568

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

569

gnutls.handshake_set_private_extensions(self._c_object,

570

True)

665

571

self.socket = socket

666

572

if credentials is None:

667

573

credentials = gnutls.Credentials()

668

gnutls.credentials_set(self, credentials.type,

669

credentials)

574

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

575

ctypes.cast(credentials._c_object,

576

ctypes.c_void_p))

670

577

self.credentials = credentials

671

578

672

579

def __del__(self):

673

gnutls.deinit(self)

674

580

gnutls.deinit(self._c_object)

581

675

582

def handshake(self):

676

return gnutls.handshake(self)

677

583

return gnutls.handshake(self._c_object)

584

678

585

def send(self, data):

679

586

data = bytes(data)

680

587

data_len = len(data)

681

588

while data_len > 0:

682

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

589

data_len -= gnutls.record_send(self._c_object,

590

data[-data_len:],

683

591

data_len)

684

592

685

593

def bye(self):

686

return gnutls.bye(self, gnutls.SHUT_RDWR)

687

594

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

595

688

596

# Error handling functions

689

597

def _error_code(result):

690

598

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

691

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

692

if result >= gnutls.E_SUCCESS:

599

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

600

if result >= 0:

693

601

return result

694

602

if result == gnutls.E_NO_CERTIFICATE_FOUND:

695

raise gnutls.CertificateSecurityError(code=result)

696

raise gnutls.Error(code=result)

697

698

def _retry_on_error(result, func, arguments,

699

_error_code=_error_code):

603

raise gnutls.CertificateSecurityError(code = result)

604

raise gnutls.Error(code = result)

605

606

def _retry_on_error(result, func, arguments):

700

607

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

701

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

702

while result < gnutls.E_SUCCESS:

608

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

609

while result < 0:

703

610

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

704

611

return _error_code(result)

705

612

result = func(*arguments)

706

613

return result

707

614

708

615

# Unless otherwise indicated, the function declarations below are

709

616

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

710

617

711

618

# Functions

712

619

priority_set_direct = _library.gnutls_priority_set_direct

713

priority_set_direct.argtypes = [ClientSession, ctypes.c_char_p,

620

priority_set_direct.argtypes = [session_t, ctypes.c_char_p,

714

621

ctypes.POINTER(ctypes.c_char_p)]

715

622

priority_set_direct.restype = _error_code

716

623

717

624

init = _library.gnutls_init

718

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

625

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

719

626

init.restype = _error_code

720

627

721

628

set_default_priority = _library.gnutls_set_default_priority

722

set_default_priority.argtypes = [ClientSession]

629

set_default_priority.argtypes = [session_t]

723

630

set_default_priority.restype = _error_code

724

631

725

632

record_send = _library.gnutls_record_send

726

record_send.argtypes = [ClientSession, ctypes.c_void_p,

633

record_send.argtypes = [session_t, ctypes.c_void_p,

727

634

ctypes.c_size_t]

728

635

record_send.restype = ctypes.c_ssize_t

729

636

record_send.errcheck = _retry_on_error

730

637

731

638

certificate_allocate_credentials = (

732

639

_library.gnutls_certificate_allocate_credentials)

733

640

certificate_allocate_credentials.argtypes = [

734

PointerTo(Credentials)]

641

ctypes.POINTER(certificate_credentials_t)]

735

642

certificate_allocate_credentials.restype = _error_code

736

643

737

644

certificate_free_credentials = (

738

645

_library.gnutls_certificate_free_credentials)

739

certificate_free_credentials.argtypes = [Credentials]

646

certificate_free_credentials.argtypes = [certificate_credentials_t]

740

647

certificate_free_credentials.restype = None

741

648

742

649

handshake_set_private_extensions = (

743

650

_library.gnutls_handshake_set_private_extensions)

744

handshake_set_private_extensions.argtypes = [ClientSession,

651

handshake_set_private_extensions.argtypes = [session_t,

745

652

ctypes.c_int]

746

653

handshake_set_private_extensions.restype = None

747

654

748

655

credentials_set = _library.gnutls_credentials_set

749

credentials_set.argtypes = [ClientSession, credentials_type_t,

750

CastToVoidPointer(Credentials)]

656

credentials_set.argtypes = [session_t, credentials_type_t,

657

ctypes.c_void_p]

751

658

credentials_set.restype = _error_code

752

659

753

660

strerror = _library.gnutls_strerror

754

661

strerror.argtypes = [ctypes.c_int]

755

662

strerror.restype = ctypes.c_char_p

756

663

757

664

certificate_type_get = _library.gnutls_certificate_type_get

758

certificate_type_get.argtypes = [ClientSession]

665

certificate_type_get.argtypes = [session_t]

759

666

certificate_type_get.restype = _error_code

760

667

761

668

certificate_get_peers = _library.gnutls_certificate_get_peers

762

certificate_get_peers.argtypes = [ClientSession,

669

certificate_get_peers.argtypes = [session_t,

763

670

ctypes.POINTER(ctypes.c_uint)]

764

671

certificate_get_peers.restype = ctypes.POINTER(datum_t)

765

672

766

673

global_set_log_level = _library.gnutls_global_set_log_level

767

674

global_set_log_level.argtypes = [ctypes.c_int]

768

675

global_set_log_level.restype = None

769

676

770

677

global_set_log_function = _library.gnutls_global_set_log_function

771

678

global_set_log_function.argtypes = [log_func]

772

679

global_set_log_function.restype = None

773

680

774

681

deinit = _library.gnutls_deinit

775

deinit.argtypes = [ClientSession]

682

deinit.argtypes = [session_t]

776

683

deinit.restype = None

777

684

778

685

handshake = _library.gnutls_handshake

779

handshake.argtypes = [ClientSession]

780

handshake.restype = ctypes.c_int

686

handshake.argtypes = [session_t]

687

handshake.restype = _error_code

781

688

handshake.errcheck = _retry_on_error

782

689

783

690

transport_set_ptr = _library.gnutls_transport_set_ptr

784

transport_set_ptr.argtypes = [ClientSession, transport_ptr_t]

691

transport_set_ptr.argtypes = [session_t, transport_ptr_t]

785

692

transport_set_ptr.restype = None

786

693

787

694

bye = _library.gnutls_bye

788

bye.argtypes = [ClientSession, close_request_t]

789

bye.restype = ctypes.c_int

695

bye.argtypes = [session_t, close_request_t]

696

bye.restype = _error_code

790

697

bye.errcheck = _retry_on_error

791

698

792

699

check_version = _library.gnutls_check_version

793

700

check_version.argtypes = [ctypes.c_char_p]

794

701

check_version.restype = ctypes.c_char_p

795

796

_need_version = b"3.3.0"

797

if check_version(_need_version) is None:

798

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

799

.format(_need_version))

800

801

_tls_rawpk_version = b"3.6.6"

802

has_rawpk = bool(check_version(_tls_rawpk_version))

803

804

if has_rawpk:

805

# Types

806

class pubkey_st(ctypes.Structure):

807

_fields = []

808

pubkey_t = ctypes.POINTER(pubkey_st)

809

810

x509_crt_fmt_t = ctypes.c_int

811

812

# All the function declarations below are from

813

# gnutls/abstract.h

814

pubkey_init = _library.gnutls_pubkey_init

815

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

816

pubkey_init.restype = _error_code

817

818

pubkey_import = _library.gnutls_pubkey_import

819

pubkey_import.argtypes = [pubkey_t, ctypes.POINTER(datum_t),

820

x509_crt_fmt_t]

821

pubkey_import.restype = _error_code

822

823

pubkey_get_key_id = _library.gnutls_pubkey_get_key_id

824

pubkey_get_key_id.argtypes = [pubkey_t, ctypes.c_int,

825

ctypes.POINTER(ctypes.c_ubyte),

826

ctypes.POINTER(ctypes.c_size_t)]

827

pubkey_get_key_id.restype = _error_code

828

829

pubkey_deinit = _library.gnutls_pubkey_deinit

830

pubkey_deinit.argtypes = [pubkey_t]

831

pubkey_deinit.restype = None

832

else:

833

# All the function declarations below are from

834

# gnutls/openpgp.h

835

836

openpgp_crt_init = _library.gnutls_openpgp_crt_init

837

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

838

openpgp_crt_init.restype = _error_code

839

840

openpgp_crt_import = _library.gnutls_openpgp_crt_import

841

openpgp_crt_import.argtypes = [openpgp_crt_t,

842

ctypes.POINTER(datum_t),

843

openpgp_crt_fmt_t]

844

openpgp_crt_import.restype = _error_code

845

846

openpgp_crt_verify_self = \

847

_library.gnutls_openpgp_crt_verify_self

848

openpgp_crt_verify_self.argtypes = [

849

openpgp_crt_t,

850

ctypes.c_uint,

851

ctypes.POINTER(ctypes.c_uint),

852

]

853

openpgp_crt_verify_self.restype = _error_code

854

855

openpgp_crt_deinit = _library.gnutls_openpgp_crt_deinit

856

openpgp_crt_deinit.argtypes = [openpgp_crt_t]

857

openpgp_crt_deinit.restype = None

858

859

openpgp_crt_get_fingerprint = (

860

_library.gnutls_openpgp_crt_get_fingerprint)

861

openpgp_crt_get_fingerprint.argtypes = [openpgp_crt_t,

862

ctypes.c_void_p,

863

ctypes.POINTER(

864

ctypes.c_size_t)]

865

openpgp_crt_get_fingerprint.restype = _error_code

866

867

if check_version(b"3.6.4"):

868

certificate_type_get2 = _library.gnutls_certificate_type_get2

869

certificate_type_get2.argtypes = [ClientSession, ctypes.c_int]

870

certificate_type_get2.restype = _error_code

871

702

703

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

704

705

openpgp_crt_init = _library.gnutls_openpgp_crt_init

706

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

707

openpgp_crt_init.restype = _error_code

708

709

openpgp_crt_import = _library.gnutls_openpgp_crt_import

710

openpgp_crt_import.argtypes = [openpgp_crt_t,

711

ctypes.POINTER(datum_t),

712

openpgp_crt_fmt_t]

713

openpgp_crt_import.restype = _error_code

714

715

openpgp_crt_verify_self = _library.gnutls_openpgp_crt_verify_self

716

openpgp_crt_verify_self.argtypes = [openpgp_crt_t, ctypes.c_uint,

717

ctypes.POINTER(ctypes.c_uint)]

718

openpgp_crt_verify_self.restype = _error_code

719

720

openpgp_crt_deinit = _library.gnutls_openpgp_crt_deinit

721

openpgp_crt_deinit.argtypes = [openpgp_crt_t]

722

openpgp_crt_deinit.restype = None

723

724

openpgp_crt_get_fingerprint = (

725

_library.gnutls_openpgp_crt_get_fingerprint)

726

openpgp_crt_get_fingerprint.argtypes = [openpgp_crt_t,

727

ctypes.c_void_p,

728

ctypes.POINTER(

729

ctypes.c_size_t)]

730

openpgp_crt_get_fingerprint.restype = _error_code

731

872

732

# Remove non-public functions

873

733

del _error_code, _retry_on_error

874

734

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

735

gnutls = GnuTLS()

875

736

876

737

def call_pipe(connection, # : multiprocessing.Connection

877

738

func, *args, **kwargs):

878

739

"""This function is meant to be called by multiprocessing.Process

879

740

880

741

This function runs func(*args, **kwargs), and writes the resulting

881

742

return value on the provided multiprocessing.Connection.

882

743

"""

883

744

connection.send(func(*args, **kwargs))

884

745

connection.close()

885

746

886

887

class Client:

747

class Client(object):

888

748

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

889

749

890

750

Attributes:

891

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

751

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

892

752

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

893

753

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

894

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

895

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

896

running.

754

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

755

to see if the client lives.

756

'None' if no process is running.

897

757

checker_callback_tag: a GLib event source tag, or None

898

758

checker_command: string; External command which is run to check

899

759

if client lives. %() expansions are done at

907

767

disable_initiator_tag: a GLib event source tag, or None

908

768

enabled: bool()

909

769

fingerprint: string (40 or 32 hexadecimal digits); used to

910

uniquely identify an OpenPGP client

911

key_id: string (64 hexadecimal digits); used to uniquely identify

912

a client using raw public keys

770

uniquely identify the client

913

771

host: string; available for use by the checker command

914

772

interval: datetime.timedelta(); How often to start a new checker

915

773

last_approval_request: datetime.datetime(); (UTC) or None

931

789

disabled, or None

932

790

server_settings: The server_settings dict from main()

933

791

"""

934

792

935

793

runtime_expansions = ("approval_delay", "approval_duration",

936

"created", "enabled", "expires", "key_id",

794

"created", "enabled", "expires",

937

795

"fingerprint", "host", "interval",

938

796

"last_approval_request", "last_checked_ok",

939

797

"last_enabled", "name", "timeout")

948

806

"approved_by_default": "True",

949

807

"enabled": "True",

950

808

}

951

809

952

810

@staticmethod

953

811

def config_parser(config):

954

812

"""Construct a new dict of client settings of this form:

961

819

for client_name in config.sections():

962

820

section = dict(config.items(client_name))

963

821

client = settings[client_name] = {}

964

822

965

823

client["host"] = section["host"]

966

824

# Reformat values from string types to Python types

967

825

client["approved_by_default"] = config.getboolean(

968

826

client_name, "approved_by_default")

969

827

client["enabled"] = config.getboolean(client_name,

970

828

"enabled")

971

972

# Uppercase and remove spaces from key_id and fingerprint

973

# for later comparison purposes with return value from the

974

# key_id() and fingerprint() functions

975

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

976

.replace(" ", ""))

977

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

978

"").upper()

829

830

# Uppercase and remove spaces from fingerprint for later

831

# comparison purposes with return value from the

832

# fingerprint() function

833

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

979

834

.replace(" ", ""))

980

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

981

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

982

" fingerprint", client_name)

983

del settings[client_name]

984

continue

985

835

if "secret" in section:

986

836

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

987

837

.encode("utf-8"),

1006

856

client["last_approval_request"] = None

1007

857

client["last_checked_ok"] = None

1008

858

client["last_checker_status"] = -2

1009

859

1010

860

return settings

1011

1012

def __init__(self, settings, name=None, server_settings=None):

861

862

def __init__(self, settings, name = None, server_settings=None):

1013

863

self.name = name

1014

864

if server_settings is None:

1015

865

server_settings = {}

1017

867

# adding all client settings

1018

868

for setting, value in settings.items():

1019

869

setattr(self, setting, value)

1020

870

1021

871

if self.enabled:

1022

872

if not hasattr(self, "last_enabled"):

1023

873

self.last_enabled = datetime.datetime.utcnow()

1027

877

else:

1028

878

self.last_enabled = None

1029

879

self.expires = None

1030

1031

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

1032

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

1033

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

880

881

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

882

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

1034

883

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

1035

884

datetime.datetime.utcnow())

1036

885

1037

886

# attributes specific for this server instance

1038

887

self.checker = None

1039

888

self.checker_initiator_tag = None

1048

897

for attr in self.__dict__.keys()

1049

898

if not attr.startswith("_")]

1050

899

self.client_structure.append("client_structure")

1051

900

1052

901

for name, t in inspect.getmembers(

1053

902

type(self), lambda obj: isinstance(obj, property)):

1054

903

if not name.startswith("_"):

1055

904

self.client_structure.append(name)

1056

905

1057

906

# Send notice to process children that client state has changed

1058

907

def send_changedstate(self):

1059

908

with self.changedstate:

1060

909

self.changedstate.notify_all()

1061

910

1062

911

def enable(self):

1063

912

"""Start this client's checker and timeout hooks"""

1064

913

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

1065

914

# Already enabled

1066

915

return

916

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

1067

917

self.enabled = True

1068

918

self.last_enabled = datetime.datetime.utcnow()

1069

919

self.init_checker()

1070

920

self.send_changedstate()

1071

921

1072

922

def disable(self, quiet=True):

1073

923

"""Disable this client."""

1074

924

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

1075

925

return False

1076

926

if not quiet:

1077

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

927

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

1078

928

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

1079

929

GLib.source_remove(self.disable_initiator_tag)

1080

930

self.disable_initiator_tag = None

1088

938

self.send_changedstate()

1089

939

# Do not run this again if called by a GLib.timeout_add

1090

940

return False

1091

941

1092

942

def __del__(self):

1093

943

self.disable()

1094

1095

def init_checker(self, randomize_start=False):

1096

# Schedule a new checker to be started a randomly selected

1097

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

1098

# the startup of checkers over time when the server is

1099

# started.

944

945

def init_checker(self):

946

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

947

# and every interval from then on.

1100

948

if self.checker_initiator_tag is not None:

1101

949

GLib.source_remove(self.checker_initiator_tag)

1102

interval_milliseconds = int(self.interval.total_seconds()

1103

* 1000)

1104

if randomize_start:

1105

delay_milliseconds = random.randrange(

1106

interval_milliseconds + 1)

1107

else:

1108

delay_milliseconds = interval_milliseconds

1109

950

self.checker_initiator_tag = GLib.timeout_add(

1110

delay_milliseconds, self.start_checker, randomize_start)

1111

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

1112

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

1113

# expire at the soonest one interval after a checker was

1114

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

1115

# time might have to be extended.

1116

now = datetime.datetime.utcnow()

1117

self.expires = now + delay + self.interval

1118

# Schedule a disable() at expire time

951

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

952

self.start_checker)

953

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

1119

954

if self.disable_initiator_tag is not None:

1120

955

GLib.source_remove(self.disable_initiator_tag)

1121

956

self.disable_initiator_tag = GLib.timeout_add(

1122

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

1123

self.disable)

1124

957

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

958

# Also start a new checker *right now*.

959

self.start_checker()

960

1125

961

def checker_callback(self, source, condition, connection,

1126

962

command):

1127

963

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

964

self.checker_callback_tag = None

965

self.checker = None

1128

966

# Read return code from connection (see call_pipe)

1129

967

returncode = connection.recv()

1130

968

connection.close()

1131

if self.checker is not None:

1132

self.checker.join()

1133

self.checker_callback_tag = None

1134

self.checker = None

1135

969

1136

970

if returncode >= 0:

1137

971

self.last_checker_status = returncode

1138

972

self.last_checker_signal = None

1139

973

if self.last_checker_status == 0:

1140

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

974

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

975

vars(self))

1141

976

self.checked_ok()

1142

977

else:

1143

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

978

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

1144

979

else:

1145

980

self.last_checker_status = -1

1146

981

self.last_checker_signal = -returncode

1147

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

982

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

983

vars(self))

1148

984

return False

1149

985

1150

986

def checked_ok(self):

1151

987

"""Assert that the client has been seen, alive and well."""

1152

988

self.last_checked_ok = datetime.datetime.utcnow()

1153

989

self.last_checker_status = 0

1154

990

self.last_checker_signal = None

1155

991

self.bump_timeout()

1156

992

1157

993

def bump_timeout(self, timeout=None):

1158

994

"""Bump up the timeout for this client."""

1159

995

if timeout is None:

1165

1001

self.disable_initiator_tag = GLib.timeout_add(

1166

1002

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

1167

1003

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

1168

1004

1169

1005

def need_approval(self):

1170

1006

self.last_approval_request = datetime.datetime.utcnow()

1171

1172

def start_checker(self, start_was_randomized=False):

1007

1008

def start_checker(self):

1173

1009

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

1174

1010

1175

1011

If a checker already exists, leave it running and do

1176

1012

nothing."""

1177

1013

# The reason for not killing a running checker is that if we

1182

1018

# checkers alone, the checker would have to take more time

1183

1019

# than 'timeout' for the client to be disabled, which is as it

1184

1020

# should be.

1185

1021

1186

1022

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

1187

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

1023

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

1188

1024

self.checker.join()

1189

1025

self.checker = None

1190

1026

# Start a new checker if needed

1191

1027

if self.checker is None:

1192

1028

# Escape attributes for the shell

1193

1029

escaped_attrs = {

1194

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

1195

for attr in self.runtime_expansions}

1030

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

1031

for attr in self.runtime_expansions }

1196

1032

try:

1197

1033

command = self.checker_command % escaped_attrs

1198

1034

except TypeError as error:

1199

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

1200

self.checker_command, exc_info=error)

1035

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

1036

self.checker_command,

1037

exc_info=error)

1201

1038

return True # Try again later

1202

1039

self.current_checker_command = command

1203

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

1040

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

1041

self.name)

1204

1042

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

1205

1043

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

1206

1044

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

1208

1046

# The exception is when not debugging but nevertheless

1209

1047

# running in the foreground; use the previously

1210

1048

# created wnull.

1211

popen_args = {"close_fds": True,

1212

"shell": True,

1213

"cwd": "/"}

1049

popen_args = { "close_fds": True,

1050

"shell": True,

1051

"cwd": "/" }

1214

1052

if (not self.server_settings["debug"]

1215

1053

and self.server_settings["foreground"]):

1216

1054

popen_args.update({"stdout": wnull,

1217

"stderr": wnull})

1218

pipe = multiprocessing.Pipe(duplex=False)

1055

"stderr": wnull })

1056

pipe = multiprocessing.Pipe(duplex = False)

1219

1057

self.checker = multiprocessing.Process(

1220

target=call_pipe,

1221

args=(pipe[1], subprocess.call, command),

1222

kwargs=popen_args)

1058

target = call_pipe,

1059

args = (pipe[1], subprocess.call, command),

1060

kwargs = popen_args)

1223

1061

self.checker.start()

1224

1062

self.checker_callback_tag = GLib.io_add_watch(

1225

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

1226

GLib.PRIORITY_DEFAULT, GLib.IO_IN,

1063

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

1227

1064

self.checker_callback, pipe[0], command)

1228

if start_was_randomized:

1229

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

1230

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

1231

# interval from then on.

1232

now = datetime.datetime.utcnow()

1233

self.checker_initiator_tag = GLib.timeout_add(

1234

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

1235

self.start_checker)

1236

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

1237

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

1238

return False

1239

1065

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

1240

1066

return True

1241

1067

1242

1068

def stop_checker(self):

1243

1069

"""Force the checker process, if any, to stop."""

1244

1070

if self.checker_callback_tag:

1246

1072

self.checker_callback_tag = None

1247

1073

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

1248

1074

return

1249

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

1075

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

1250

1076

self.checker.terminate()

1251

1077

self.checker = None

1252

1078

1257

1083

byte_arrays=False):

1258

1084

"""Decorators for marking methods of a DBusObjectWithProperties to

1259

1085

become properties on the D-Bus.

1260

1086

1261

1087

The decorated method will be called with no arguments by "Get"

1262

1088

and with one argument by "Set".

1263

1089

1264

1090

The parameters, where they are supported, are the same as

1265

1091

dbus.service.method, except there is only "signature", since the

1266

1092

type from Get() and the type sent to Set() is the same.

1270

1096

if byte_arrays and signature != "ay":

1271

1097

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

1272

1098

" signature {!r}".format(signature))

1273

1099

1274

1100

def decorator(func):

1275

1101

func._dbus_is_property = True

1276

1102

func._dbus_interface = dbus_interface

1279

1105

func._dbus_name = func.__name__

1280

1106

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

1281

1107

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

1282

func._dbus_get_args_options = {"byte_arrays": byte_arrays}

1108

func._dbus_get_args_options = {'byte_arrays': byte_arrays }

1283

1109

return func

1284

1110

1285

1111

return decorator

1286

1112

1287

1113

1288

1114

def dbus_interface_annotations(dbus_interface):

1289

1115

"""Decorator for marking functions returning interface annotations

1290

1116

1291

1117

Usage:

1292

1118

1293

1119

@dbus_interface_annotations("org.example.Interface")

1294

1120

def _foo(self): # Function name does not matter

1295

1121

return {"org.freedesktop.DBus.Deprecated": "true",

1296

1122

"org.freedesktop.DBus.Property.EmitsChangedSignal":

1297

1123

"false"}

1298

1124

"""

1299

1125

1300

1126

def decorator(func):

1301

1127

func._dbus_is_interface = True

1302

1128

func._dbus_interface = dbus_interface

1303

1129

func._dbus_name = dbus_interface

1304

1130

return func

1305

1131

1306

1132

return decorator

1307

1133

1308

1134

1309

1135

def dbus_annotations(annotations):

1310

1136

"""Decorator to annotate D-Bus methods, signals or properties

1311

1137

Usage:

1312

1138

1313

1139

@dbus_annotations({"org.freedesktop.DBus.Deprecated": "true",

1314

1140

"org.freedesktop.DBus.Property."

1315

1141

"EmitsChangedSignal": "false"})

1317

1143

access="r")

1318

1144

def Property_dbus_property(self):

1319

1145

return dbus.Boolean(False)

1320

1146

1321

1147

See also the DBusObjectWithAnnotations class.

1322

1148

"""

1323

1149

1324

1150

def decorator(func):

1325

1151

func._dbus_annotations = annotations

1326

1152

return func

1327

1153

1328

1154

return decorator

1329

1155

1330

1156

1348

1174

1349

1175

class DBusObjectWithAnnotations(dbus.service.Object):

1350

1176

"""A D-Bus object with annotations.

1351

1177

1352

1178

Classes inheriting from this can use the dbus_annotations

1353

1179

decorator to add annotations to methods or signals.

1354

1180

"""

1355

1181

1356

1182

@staticmethod

1357

1183

def _is_dbus_thing(thing):

1358

1184

"""Returns a function testing if an attribute is a D-Bus thing

1359

1185

1360

1186

If called like _is_dbus_thing("method") it returns a function

1361

1187

suitable for use as predicate to inspect.getmembers().

1362

1188

"""

1363

1189

return lambda obj: getattr(obj, "_dbus_is_{}".format(thing),

1364

1190

False)

1365

1191

1366

1192

def _get_all_dbus_things(self, thing):

1367

1193

"""Returns a generator of (name, attribute) pairs

1368

1194

"""

1371

1197

for cls in self.__class__.__mro__

1372

1198

for name, athing in

1373

1199

inspect.getmembers(cls, self._is_dbus_thing(thing)))

1374

1200

1375

1201

@dbus.service.method(dbus.INTROSPECTABLE_IFACE,

1376

out_signature="s",

1377

path_keyword="object_path",

1378

connection_keyword="connection")

1202

out_signature = "s",

1203

path_keyword = 'object_path',

1204

connection_keyword = 'connection')

1379

1205

def Introspect(self, object_path, connection):

1380

1206

"""Overloading of standard D-Bus method.

1381

1207

1382

1208

Inserts annotation tags on methods and signals.

1383

1209

"""

1384

1210

xmlstring = dbus.service.Object.Introspect(self, object_path,

1385

1211

connection)

1386

1212

try:

1387

1213

document = xml.dom.minidom.parseString(xmlstring)

1388

1214

1389

1215

for if_tag in document.getElementsByTagName("interface"):

1390

1216

# Add annotation tags

1391

1217

for typ in ("method", "signal"):

1418

1244

if_tag.appendChild(ann_tag)

1419

1245

# Fix argument name for the Introspect method itself

1420

1246

if (if_tag.getAttribute("name")

1421

== dbus.INTROSPECTABLE_IFACE):

1247

== dbus.INTROSPECTABLE_IFACE):

1422

1248

for cn in if_tag.getElementsByTagName("method"):

1423

1249

if cn.getAttribute("name") == "Introspect":

1424

1250

for arg in cn.getElementsByTagName("arg"):

1430

1256

document.unlink()

1431

1257

except (AttributeError, xml.dom.DOMException,

1432

1258

xml.parsers.expat.ExpatError) as error:

1433

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

1434

exc_info=error)

1259

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

1260

exc_info=error)

1435

1261

return xmlstring

1436

1262

1437

1263

1438

1264

class DBusObjectWithProperties(DBusObjectWithAnnotations):

1439

1265

"""A D-Bus object with properties.

1440

1266

1441

1267

Classes inheriting from this can use the dbus_service_property

1442

1268

decorator to expose methods as D-Bus properties. It exposes the

1443

1269

standard Get(), Set(), and GetAll() methods on the D-Bus.

1444

1270

"""

1445

1271

1446

1272

def _get_dbus_property(self, interface_name, property_name):

1447

1273

"""Returns a bound method if one exists which is a D-Bus

1448

1274

property with the specified name and interface.

1453

1279

if (value._dbus_name == property_name

1454

1280

and value._dbus_interface == interface_name):

1455

1281

return value.__get__(self)

1456

1282

1457

1283

# No such property

1458

1284

raise DBusPropertyNotFound("{}:{}.{}".format(

1459

1285

self.dbus_object_path, interface_name, property_name))

1460

1286

1461

1287

@classmethod

1462

1288

def _get_all_interface_names(cls):

1463

1289

"""Get a sequence of all interfaces supported by an object"""

1466

1292

for x in (inspect.getmro(cls))

1467

1293

for attr in dir(x))

1468

1294

if name is not None)

1469

1295

1470

1296

@dbus.service.method(dbus.PROPERTIES_IFACE,

1471

1297

in_signature="ss",

1472

1298

out_signature="v")

1480

1306

if not hasattr(value, "variant_level"):

1481

1307

return value

1482

1308

return type(value)(value, variant_level=value.variant_level+1)

1483

1309

1484

1310

@dbus.service.method(dbus.PROPERTIES_IFACE, in_signature="ssv")

1485

1311

def Set(self, interface_name, property_name, value):

1486

1312

"""Standard D-Bus property Set() method, see D-Bus standard.

1495

1321

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

1496

1322

"'ay' signature {!r}"

1497

1323

.format(prop._dbus_signature))

1498

value = dbus.ByteArray(bytes(value))

1324

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

1325

for byte in value))

1499

1326

prop(value)

1500

1327

1501

1328

@dbus.service.method(dbus.PROPERTIES_IFACE,

1502

1329

in_signature="s",

1503

1330

out_signature="a{sv}")

1504

1331

def GetAll(self, interface_name):

1505

1332

"""Standard D-Bus property GetAll() method, see D-Bus

1506

1333

standard.

1507

1334

1508

1335

Note: Will not include properties with access="write".

1509

1336

"""

1510

1337

properties = {}

1521

1348

properties[name] = value

1522

1349

continue

1523

1350

properties[name] = type(value)(

1524

value, variant_level=value.variant_level + 1)

1351

value, variant_level = value.variant_level + 1)

1525

1352

return dbus.Dictionary(properties, signature="sv")

1526

1353

1527

1354

@dbus.service.signal(dbus.PROPERTIES_IFACE, signature="sa{sv}as")

1528

1355

def PropertiesChanged(self, interface_name, changed_properties,

1529

1356

invalidated_properties):

1531

1358

standard.

1532

1359

"""

1533

1360

pass

1534

1361

1535

1362

@dbus.service.method(dbus.INTROSPECTABLE_IFACE,

1536

1363

out_signature="s",

1537

path_keyword="object_path",

1538

connection_keyword="connection")

1364

path_keyword='object_path',

1365

connection_keyword='connection')

1539

1366

def Introspect(self, object_path, connection):

1540

1367

"""Overloading of standard D-Bus method.

1541

1368

1542

1369

Inserts property tags and interface annotation tags.

1543

1370

"""

1544

1371

xmlstring = DBusObjectWithAnnotations.Introspect(self,

1546

1373

connection)

1547

1374

try:

1548

1375

document = xml.dom.minidom.parseString(xmlstring)

1549

1376

1550

1377

def make_tag(document, name, prop):

1551

1378

e = document.createElement("property")

1552

1379

e.setAttribute("name", name)

1553

1380

e.setAttribute("type", prop._dbus_signature)

1554

1381

e.setAttribute("access", prop._dbus_access)

1555

1382

return e

1556

1383

1557

1384

for if_tag in document.getElementsByTagName("interface"):

1558

1385

# Add property tags

1559

1386

for tag in (make_tag(document, name, prop)

1597

1424

document.unlink()

1598

1425

except (AttributeError, xml.dom.DOMException,

1599

1426

xml.parsers.expat.ExpatError) as error:

1600

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

1601

exc_info=error)

1427

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

1428

exc_info=error)

1602

1429

return xmlstring

1603

1430

1604

1605

1431

try:

1606

1432

dbus.OBJECT_MANAGER_IFACE

1607

1433

except AttributeError:

1608

1434

dbus.OBJECT_MANAGER_IFACE = "org.freedesktop.DBus.ObjectManager"

1609

1435

1610

1611

1436

class DBusObjectWithObjectManager(DBusObjectWithAnnotations):

1612

1437

"""A D-Bus object with an ObjectManager.

1613

1438

1614

1439

Classes inheriting from this exposes the standard

1615

1440

GetManagedObjects call and the InterfacesAdded and

1616

1441

InterfacesRemoved signals on the standard

1617

1442

"org.freedesktop.DBus.ObjectManager" interface.

1618

1443

1619

1444

Note: No signals are sent automatically; they must be sent

1620

1445

manually.

1621

1446

"""

1622

1447

@dbus.service.method(dbus.OBJECT_MANAGER_IFACE,

1623

out_signature="a{oa{sa{sv}}}")

1448

out_signature = "a{oa{sa{sv}}}")

1624

1449

def GetManagedObjects(self):

1625

1450

"""This function must be overridden"""

1626

1451

raise NotImplementedError()

1627

1452

1628

1453

@dbus.service.signal(dbus.OBJECT_MANAGER_IFACE,

1629

signature="oa{sa{sv}}")

1454

signature = "oa{sa{sv}}")

1630

1455

def InterfacesAdded(self, object_path, interfaces_and_properties):

1631

1456

pass

1632

1633

@dbus.service.signal(dbus.OBJECT_MANAGER_IFACE, signature="oas")

1457

1458

@dbus.service.signal(dbus.OBJECT_MANAGER_IFACE, signature = "oas")

1634

1459

def InterfacesRemoved(self, object_path, interfaces):

1635

1460

pass

1636

1461

1637

1462

@dbus.service.method(dbus.INTROSPECTABLE_IFACE,

1638

out_signature="s",

1639

path_keyword="object_path",

1640

connection_keyword="connection")

1463

out_signature = "s",

1464

path_keyword = 'object_path',

1465

connection_keyword = 'connection')

1641

1466

def Introspect(self, object_path, connection):

1642

1467

"""Overloading of standard D-Bus method.

1643

1468

1644

1469

Override return argument name of GetManagedObjects to be

1645

1470

"objpath_interfaces_and_properties"

1646

1471

"""

1649

1474

connection)

1650

1475

try:

1651

1476

document = xml.dom.minidom.parseString(xmlstring)

1652

1477

1653

1478

for if_tag in document.getElementsByTagName("interface"):

1654

1479

# Fix argument name for the GetManagedObjects method

1655

1480

if (if_tag.getAttribute("name")

1656

== dbus.OBJECT_MANAGER_IFACE):

1481

== dbus.OBJECT_MANAGER_IFACE):

1657

1482

for cn in if_tag.getElementsByTagName("method"):

1658

1483

if (cn.getAttribute("name")

1659

1484

== "GetManagedObjects"):

1668

1493

document.unlink()

1669

1494

except (AttributeError, xml.dom.DOMException,

1670

1495

xml.parsers.expat.ExpatError) as error:

1671

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

1672

exc_info=error)

1496

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

1497

exc_info = error)

1673

1498

return xmlstring

1674

1499

1675

1676

1500

def datetime_to_dbus(dt, variant_level=0):

1677

1501

"""Convert a UTC datetime.datetime() to a D-Bus type."""

1678

1502

if dt is None:

1679

return dbus.String("", variant_level=variant_level)

1503

return dbus.String("", variant_level = variant_level)

1680

1504

return dbus.String(dt.isoformat(), variant_level=variant_level)

1681

1505

1682

1506

1685

1509

dbus.service.Object, it will add alternate D-Bus attributes with

1686

1510

interface names according to the "alt_interface_names" mapping.

1687

1511

Usage:

1688

1512

1689

1513

@alternate_dbus_interfaces({"org.example.Interface":

1690

1514

"net.example.AlternateInterface"})

1691

1515

class SampleDBusObject(dbus.service.Object):

1692

1516

@dbus.service.method("org.example.Interface")

1693

1517

def SampleDBusMethod():

1694

1518

pass

1695

1519

1696

1520

The above "SampleDBusMethod" on "SampleDBusObject" will be

1697

1521

reachable via two interfaces: "org.example.Interface" and

1698

1522

"net.example.AlternateInterface", the latter of which will have

1699

1523

its D-Bus annotation "org.freedesktop.DBus.Deprecated" set to

1700

1524

"true", unless "deprecate" is passed with a False value.

1701

1525

1702

1526

This works for methods and signals, and also for D-Bus properties

1703

1527

(from DBusObjectWithProperties) and interfaces (from the

1704

1528

dbus_interface_annotations decorator).

1705

1529

"""

1706

1530

1707

1531

def wrapper(cls):

1708

1532

for orig_interface_name, alt_interface_name in (

1709

1533

alt_interface_names.items()):

1749

1573

attribute._dbus_annotations)

1750

1574

except AttributeError:

1751

1575

pass

1752

1753

1576

# Define a creator of a function to call both the

1754

1577

# original and alternate functions, so both the

1755

1578

# original and alternate signals gets sent when

1758

1581

"""This function is a scope container to pass

1759

1582

func1 and func2 to the "call_both" function

1760

1583

outside of its arguments"""

1761

1584

1762

1585

@functools.wraps(func2)

1763

1586

def call_both(*args, **kwargs):

1764

1587

"""This function will emit two D-Bus

1765

1588

signals by calling func1 and func2"""

1766

1589

func1(*args, **kwargs)

1767

1590

func2(*args, **kwargs)

1768

# Make wrapper function look like a D-Bus

1769

# signal

1591

# Make wrapper function look like a D-Bus signal

1770

1592

for name, attr in inspect.getmembers(func2):

1771

1593

if name.startswith("_dbus_"):

1772

1594

setattr(call_both, name, attr)

1773

1595

1774

1596

return call_both

1775

1597

# Create the "call_both" function and add it to

1776

1598

# the class

1822

1644

(copy_function(attribute)))

1823

1645

if deprecate:

1824

1646

# Deprecate all alternate interfaces

1825

iname = "_AlternateDBusNames_interface_annotation{}"

1647

iname="_AlternateDBusNames_interface_annotation{}"

1826

1648

for interface_name in interface_names:

1827

1649

1828

1650

@dbus_interface_annotations(interface_name)

1829

1651

def func(self):

1830

return {"org.freedesktop.DBus.Deprecated":

1831

"true"}

1652

return { "org.freedesktop.DBus.Deprecated":

1653

"true" }

1832

1654

# Find an unused name

1833

1655

for aname in (iname.format(i)

1834

1656

for i in itertools.count()):

1845

1667

cls = type("{}Alternate".format(cls.__name__),

1846

1668

(cls, ), attr)

1847

1669

return cls

1848

1670

1849

1671

return wrapper

1850

1672

1851

1673

1853

1675

"se.bsnet.fukt.Mandos"})

1854

1676

class ClientDBus(Client, DBusObjectWithProperties):

1855

1677

"""A Client class using D-Bus

1856

1678

1857

1679

Attributes:

1858

1680

dbus_object_path: dbus.ObjectPath

1859

1681

bus: dbus.SystemBus()

1860

1682

"""

1861

1683

1862

1684

runtime_expansions = (Client.runtime_expansions

1863

1685

+ ("dbus_object_path", ))

1864

1686

1865

1687

_interface = "se.recompile.Mandos.Client"

1866

1688

1867

1689

# dbus.service.Object doesn't use super(), so we can't either.

1868

1869

def __init__(self, bus=None, *args, **kwargs):

1690

1691

def __init__(self, bus = None, *args, **kwargs):

1870

1692

self.bus = bus

1871

1693

Client.__init__(self, *args, **kwargs)

1872

1694

# Only now, when this client is initialized, can it show up on

1878

1700

"/clients/" + client_object_name)

1879

1701

DBusObjectWithProperties.__init__(self, self.bus,

1880

1702

self.dbus_object_path)

1881

1703

1882

1704

def notifychangeproperty(transform_func, dbus_name,

1883

1705

type_func=lambda x: x,

1884

1706

variant_level=1,

1886

1708

_interface=_interface):

1887

1709

""" Modify a variable so that it's a property which announces

1888

1710

its changes to DBus.

1889

1711

1890

1712

transform_fun: Function that takes a value and a variant_level

1891

1713

and transforms it to a D-Bus type.

1892

1714

dbus_name: D-Bus name of the variable

1895

1717

variant_level: D-Bus variant level. Default: 1

1896

1718

"""

1897

1719

attrname = "_{}".format(dbus_name)

1898

1720

1899

1721

def setter(self, value):

1900

1722

if hasattr(self, "dbus_object_path"):

1901

1723

if (not hasattr(self, attrname) or

1908

1730

else:

1909

1731

dbus_value = transform_func(

1910

1732

type_func(value),

1911

variant_level=variant_level)

1733

variant_level = variant_level)

1912

1734

self.PropertyChanged(dbus.String(dbus_name),

1913

1735

dbus_value)

1914

1736

self.PropertiesChanged(

1915

1737

_interface,

1916

dbus.Dictionary({dbus.String(dbus_name):

1917

dbus_value}),

1738

dbus.Dictionary({ dbus.String(dbus_name):

1739

dbus_value }),

1918

1740

dbus.Array())

1919

1741

setattr(self, attrname, value)

1920

1742

1921

1743

return property(lambda self: getattr(self, attrname), setter)

1922

1744

1923

1745

expires = notifychangeproperty(datetime_to_dbus, "Expires")

1924

1746

approvals_pending = notifychangeproperty(dbus.Boolean,

1925

1747

"ApprovalPending",

1926

type_func=bool)

1748

type_func = bool)

1927

1749

enabled = notifychangeproperty(dbus.Boolean, "Enabled")

1928

1750

last_enabled = notifychangeproperty(datetime_to_dbus,

1929

1751

"LastEnabled")

1930

1752

checker = notifychangeproperty(

1931

1753

dbus.Boolean, "CheckerRunning",

1932

type_func=lambda checker: checker is not None)

1754

type_func = lambda checker: checker is not None)

1933

1755

last_checked_ok = notifychangeproperty(datetime_to_dbus,

1934

1756

"LastCheckedOK")

1935

1757

last_checker_status = notifychangeproperty(dbus.Int16,

1940

1762

"ApprovedByDefault")

1941

1763

approval_delay = notifychangeproperty(

1942

1764

dbus.UInt64, "ApprovalDelay",

1943

type_func=lambda td: td.total_seconds() * 1000)

1765

type_func = lambda td: td.total_seconds() * 1000)

1944

1766

approval_duration = notifychangeproperty(

1945

1767

dbus.UInt64, "ApprovalDuration",

1946

type_func=lambda td: td.total_seconds() * 1000)

1768

type_func = lambda td: td.total_seconds() * 1000)

1947

1769

host = notifychangeproperty(dbus.String, "Host")

1948

1770

timeout = notifychangeproperty(

1949

1771

dbus.UInt64, "Timeout",

1950

type_func=lambda td: td.total_seconds() * 1000)

1772

type_func = lambda td: td.total_seconds() * 1000)

1951

1773

extended_timeout = notifychangeproperty(

1952

1774

dbus.UInt64, "ExtendedTimeout",

1953

type_func=lambda td: td.total_seconds() * 1000)

1775

type_func = lambda td: td.total_seconds() * 1000)

1954

1776

interval = notifychangeproperty(

1955

1777

dbus.UInt64, "Interval",

1956

type_func=lambda td: td.total_seconds() * 1000)

1778

type_func = lambda td: td.total_seconds() * 1000)

1957

1779

checker_command = notifychangeproperty(dbus.String, "Checker")

1958

1780

secret = notifychangeproperty(dbus.ByteArray, "Secret",

1959

1781

invalidate_only=True)

1960

1782

1961

1783

del notifychangeproperty

1962

1784

1963

1785

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

1964

1786

try:

1965

1787

self.remove_from_connection()

1968

1790

if hasattr(DBusObjectWithProperties, "__del__"):

1969

1791

DBusObjectWithProperties.__del__(self, *args, **kwargs)

1970

1792

Client.__del__(self, *args, **kwargs)

1971

1793

1972

1794

def checker_callback(self, source, condition,

1973

1795

connection, command, *args, **kwargs):

1974

1796

ret = Client.checker_callback(self, source, condition,

1990

1812

| self.last_checker_signal),

1991

1813

dbus.String(command))

1992

1814

return ret

1993

1815

1994

1816

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

1995

1817

old_checker_pid = getattr(self.checker, "pid", None)

1996

1818

r = Client.start_checker(self, *args, **kwargs)

2000

1822

# Emit D-Bus signal

2001

1823

self.CheckerStarted(self.current_checker_command)

2002

1824

return r

2003

1825

2004

1826

def _reset_approved(self):

2005

1827

self.approved = None

2006

1828

return False

2007

1829

2008

1830

def approve(self, value=True):

2009

1831

self.approved = value

2010

1832

GLib.timeout_add(int(self.approval_duration.total_seconds()

2011

1833

* 1000), self._reset_approved)

2012

1834

self.send_changedstate()

2013

2014

# D-Bus methods, signals & properties

2015

2016

# Interfaces

2017

2018

# Signals

2019

1835

1836

## D-Bus methods, signals & properties

1837

1838

## Interfaces

1839

1840

## Signals

1841

2020

1842

# CheckerCompleted - signal

2021

1843

@dbus.service.signal(_interface, signature="nxs")

2022

1844

def CheckerCompleted(self, exitcode, waitstatus, command):

2023

1845

"D-Bus signal"

2024

1846

pass

2025

1847

2026

1848

# CheckerStarted - signal

2027

1849

@dbus.service.signal(_interface, signature="s")

2028

1850

def CheckerStarted(self, command):

2029

1851

"D-Bus signal"

2030

1852

pass

2031

1853

2032

1854

# PropertyChanged - signal

2033

1855

@dbus_annotations({"org.freedesktop.DBus.Deprecated": "true"})

2034

1856

@dbus.service.signal(_interface, signature="sv")

2035

1857

def PropertyChanged(self, property, value):

2036

1858

"D-Bus signal"

2037

1859

pass

2038

1860

2039

1861

# GotSecret - signal

2040

1862

@dbus.service.signal(_interface)

2041

1863

def GotSecret(self):

2044

1866

server to mandos-client

2045

1867

"""

2046

1868

pass

2047

1869

2048

1870

# Rejected - signal

2049

1871

@dbus.service.signal(_interface, signature="s")

2050

1872

def Rejected(self, reason):

2051

1873

"D-Bus signal"

2052

1874

pass

2053

1875

2054

1876

# NeedApproval - signal

2055

1877

@dbus.service.signal(_interface, signature="tb")

2056

1878

def NeedApproval(self, timeout, default):

2057

1879

"D-Bus signal"

2058

1880

return self.need_approval()

2059

2060

# Methods

2061

1881

1882

## Methods

1883

2062

1884

# Approve - method

2063

1885

@dbus.service.method(_interface, in_signature="b")

2064

1886

def Approve(self, value):

2065

1887

self.approve(value)

2066

1888

2067

1889

# CheckedOK - method

2068

1890

@dbus.service.method(_interface)

2069

1891

def CheckedOK(self):

2070

1892

self.checked_ok()

2071

1893

2072

1894

# Enable - method

2073

1895

@dbus_annotations({"org.freedesktop.DBus.Deprecated": "true"})

2074

1896

@dbus.service.method(_interface)

2075

1897

def Enable(self):

2076

1898

"D-Bus method"

2077

1899

self.enable()

2078

1900

2079

1901

# StartChecker - method

2080

1902

@dbus_annotations({"org.freedesktop.DBus.Deprecated": "true"})

2081

1903

@dbus.service.method(_interface)

2082

1904

def StartChecker(self):

2083

1905

"D-Bus method"

2084

1906

self.start_checker()

2085

1907

2086

1908

# Disable - method

2087

1909

@dbus_annotations({"org.freedesktop.DBus.Deprecated": "true"})

2088

1910

@dbus.service.method(_interface)

2089

1911

def Disable(self):

2090

1912

"D-Bus method"

2091

1913

self.disable()

2092

1914

2093

1915

# StopChecker - method

2094

1916

@dbus_annotations({"org.freedesktop.DBus.Deprecated": "true"})

2095

1917

@dbus.service.method(_interface)

2096

1918

def StopChecker(self):

2097

1919

self.stop_checker()

2098

2099

# Properties

2100

1920

1921

## Properties

1922

2101

1923

# ApprovalPending - property

2102

1924

@dbus_service_property(_interface, signature="b", access="read")

2103

1925

def ApprovalPending_dbus_property(self):

2104

1926

return dbus.Boolean(bool(self.approvals_pending))

2105

1927

2106

1928

# ApprovedByDefault - property

2107

1929

@dbus_service_property(_interface,

2108

1930

signature="b",

2111

1933

if value is None: # get

2112

1934

return dbus.Boolean(self.approved_by_default)

2113

1935

self.approved_by_default = bool(value)

2114

1936

2115

1937

# ApprovalDelay - property

2116

1938

@dbus_service_property(_interface,

2117

1939

signature="t",

2121

1943

return dbus.UInt64(self.approval_delay.total_seconds()

2122

1944

* 1000)

2123

1945

self.approval_delay = datetime.timedelta(0, 0, 0, value)

2124

1946

2125

1947

# ApprovalDuration - property

2126

1948

@dbus_service_property(_interface,

2127

1949

signature="t",

2131

1953

return dbus.UInt64(self.approval_duration.total_seconds()

2132

1954

* 1000)

2133

1955

self.approval_duration = datetime.timedelta(0, 0, 0, value)

2134

1956

2135

1957

# Name - property

2136

1958

@dbus_annotations(

2137

1959

{"org.freedesktop.DBus.Property.EmitsChangedSignal": "const"})

2138

1960

@dbus_service_property(_interface, signature="s", access="read")

2139

1961

def Name_dbus_property(self):

2140

1962

return dbus.String(self.name)

2141

2142

# KeyID - property

2143

@dbus_annotations(

2144

{"org.freedesktop.DBus.Property.EmitsChangedSignal": "const"})

2145

@dbus_service_property(_interface, signature="s", access="read")

2146

def KeyID_dbus_property(self):

2147

return dbus.String(self.key_id)

2148

1963

2149

1964

# Fingerprint - property

2150

1965

@dbus_annotations(

2151

1966

{"org.freedesktop.DBus.Property.EmitsChangedSignal": "const"})

2152

1967

@dbus_service_property(_interface, signature="s", access="read")

2153

1968

def Fingerprint_dbus_property(self):

2154

1969

return dbus.String(self.fingerprint)

2155

1970

2156

1971

# Host - property

2157

1972

@dbus_service_property(_interface,

2158

1973

signature="s",

2161

1976

if value is None: # get

2162

1977

return dbus.String(self.host)

2163

1978

self.host = str(value)

2164

1979

2165

1980

# Created - property

2166

1981

@dbus_annotations(

2167

1982

{"org.freedesktop.DBus.Property.EmitsChangedSignal": "const"})

2168

1983

@dbus_service_property(_interface, signature="s", access="read")

2169

1984

def Created_dbus_property(self):

2170

1985

return datetime_to_dbus(self.created)

2171

1986

2172

1987

# LastEnabled - property

2173

1988

@dbus_service_property(_interface, signature="s", access="read")

2174

1989

def LastEnabled_dbus_property(self):

2175

1990

return datetime_to_dbus(self.last_enabled)

2176

1991

2177

1992

# Enabled - property

2178

1993

@dbus_service_property(_interface,

2179

1994

signature="b",

2185

2000

self.enable()

2186

2001

else:

2187

2002

self.disable()

2188

2003

2189

2004

# LastCheckedOK - property

2190

2005

@dbus_service_property(_interface,

2191

2006

signature="s",

2195

2010

self.checked_ok()

2196

2011

return

2197

2012

return datetime_to_dbus(self.last_checked_ok)

2198

2013

2199

2014

# LastCheckerStatus - property

2200

2015

@dbus_service_property(_interface, signature="n", access="read")

2201

2016

def LastCheckerStatus_dbus_property(self):

2202

2017

return dbus.Int16(self.last_checker_status)

2203

2018

2204

2019

# Expires - property

2205

2020

@dbus_service_property(_interface, signature="s", access="read")

2206

2021

def Expires_dbus_property(self):

2207

2022

return datetime_to_dbus(self.expires)

2208

2023

2209

2024

# LastApprovalRequest - property

2210

2025

@dbus_service_property(_interface, signature="s", access="read")

2211

2026

def LastApprovalRequest_dbus_property(self):

2212

2027

return datetime_to_dbus(self.last_approval_request)

2213

2028

2214

2029

# Timeout - property

2215

2030

@dbus_service_property(_interface,

2216

2031

signature="t",

2235

2050

self.disable_initiator_tag = GLib.timeout_add(

2236

2051

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

2237

2052

self.disable)

2238

2053

2239

2054

# ExtendedTimeout - property

2240

2055

@dbus_service_property(_interface,

2241

2056

signature="t",

2245

2060

return dbus.UInt64(self.extended_timeout.total_seconds()

2246

2061

* 1000)

2247

2062

self.extended_timeout = datetime.timedelta(0, 0, 0, value)

2248

2063

2249

2064

# Interval - property

2250

2065

@dbus_service_property(_interface,

2251

2066

signature="t",

2261

2076

GLib.source_remove(self.checker_initiator_tag)

2262

2077

self.checker_initiator_tag = GLib.timeout_add(

2263

2078

value, self.start_checker)

2264

self.start_checker() # Start one now, too

2265

2079

self.start_checker() # Start one now, too

2080

2266

2081

# Checker - property

2267

2082

@dbus_service_property(_interface,

2268

2083

signature="s",

2271

2086

if value is None: # get

2272

2087

return dbus.String(self.checker_command)

2273

2088

self.checker_command = str(value)

2274

2089

2275

2090

# CheckerRunning - property

2276

2091

@dbus_service_property(_interface,

2277

2092

signature="b",

2283

2098

self.start_checker()

2284

2099

else:

2285

2100

self.stop_checker()

2286

2101

2287

2102

# ObjectPath - property

2288

2103

@dbus_annotations(

2289

2104

{"org.freedesktop.DBus.Property.EmitsChangedSignal": "const",

2290

2105

"org.freedesktop.DBus.Deprecated": "true"})

2291

2106

@dbus_service_property(_interface, signature="o", access="read")

2292

2107

def ObjectPath_dbus_property(self):

2293

return self.dbus_object_path # is already a dbus.ObjectPath

2294

2108

return self.dbus_object_path # is already a dbus.ObjectPath

2109

2295

2110

# Secret = property

2296

2111

@dbus_annotations(

2297

2112

{"org.freedesktop.DBus.Property.EmitsChangedSignal":

2302

2117

byte_arrays=True)

2303

2118

def Secret_dbus_property(self, value):

2304

2119

self.secret = bytes(value)

2305

2120

2306

2121

del _interface

2307

2122

2308

2123

2309

class ProxyClient:

2310

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

2124

class ProxyClient(object):

2125

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

2311

2126

self._pipe = child_pipe

2312

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

2127

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

2313

2128

if not self._pipe.recv():

2314

raise KeyError(key_id or fpr)

2315

2129

raise KeyError(fpr)

2130

2316

2131

def __getattribute__(self, name):

2317

if name == "_pipe":

2132

if name == '_pipe':

2318

2133

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

2319

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

2134

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

2320

2135

data = self._pipe.recv()

2321

if data[0] == "data":

2136

if data[0] == 'data':

2322

2137

return data[1]

2323

if data[0] == "function":

2324

2138

if data[0] == 'function':

2139

2325

2140

def func(*args, **kwargs):

2326

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

2141

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

2327

2142

return self._pipe.recv()[1]

2328

2143

2329

2144

return func

2330

2145

2331

2146

def __setattr__(self, name, value):

2332

if name == "_pipe":

2147

if name == '_pipe':

2333

2148

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

2334

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

2149

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

2335

2150

2336

2151

2337

2152

class ClientHandler(socketserver.BaseRequestHandler, object):

2338

2153

"""A class to handle client connections.

2339

2154

2340

2155

Instantiated once for each connection to handle it.

2341

2156

Note: This will run in its own forked process."""

2342

2157

2343

2158

def handle(self):

2344

2159

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

2345

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

2346

str(self.client_address))

2347

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

2348

2160

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

2161

str(self.client_address))

2162

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

2163

self.server.child_pipe.fileno())

2164

2349

2165

session = gnutls.ClientSession(self.request)

2350

2351

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

2352

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

2353

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

2354

# "+DHE-DSS"))

2166

2167

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

2168

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

2169

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

2170

# "+DHE-DSS"))

2355

2171

# Use a fallback default, since this MUST be set.

2356

2172

priority = self.server.gnutls_priority

2357

2173

if priority is None:

2358

2174

priority = "NORMAL"

2359

gnutls.priority_set_direct(session,

2360

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

2361

2175

gnutls.priority_set_direct(session._c_object, priority,

2176

None)

2177

2362

2178

# Start communication using the Mandos protocol

2363

2179

# Get protocol number

2364

2180

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

2365

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

2181

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

2366

2182

try:

2367

2183

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

2368

2184

raise RuntimeError(line)

2369

2185

except (ValueError, IndexError, RuntimeError) as error:

2370

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

2186

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

2371

2187

return

2372

2188

2373

2189

# Start GnuTLS connection

2374

2190

try:

2375

2191

session.handshake()

2376

2192

except gnutls.Error as error:

2377

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

2193

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

2378

2194

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

2379

2195

# established. Just abandon the request.

2380

2196

return

2381

log.debug("Handshake succeeded")

2382

2197

logger.debug("Handshake succeeded")

2198

2383

2199

approval_required = False

2384

2200

try:

2385

if gnutls.has_rawpk:

2386

fpr = b""

2387

try:

2388

key_id = self.key_id(

2389

self.peer_certificate(session))

2390

except (TypeError, gnutls.Error) as error:

2391

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

2392

return

2393

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

2394

key_id.decode("utf-8",

2395

errors="replace"))

2396

2397

else:

2398

key_id = b""

2399

try:

2400

fpr = self.fingerprint(

2401

self.peer_certificate(session))

2402

except (TypeError, gnutls.Error) as error:

2403

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

2404

return

2405

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

2406

2407

try:

2408

client = ProxyClient(child_pipe, key_id, fpr,

2201

try:

2202

fpr = self.fingerprint(

2203

self.peer_certificate(session))

2204

except (TypeError, gnutls.Error) as error:

2205

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

2206

return

2207

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

2208

2209

try:

2210

client = ProxyClient(child_pipe, fpr,

2409

2211

self.client_address)

2410

2212

except KeyError:

2411

2213

return

2412

2214

2413

2215

if client.approval_delay:

2414

2216

delay = client.approval_delay

2415

2217

client.approvals_pending += 1

2416

2218

approval_required = True

2417

2219

2418

2220

while True:

2419

2221

if not client.enabled:

2420

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

2222

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

2223

client.name)

2421

2224

if self.server.use_dbus:

2422

2225

# Emit D-Bus signal

2423

2226

client.Rejected("Disabled")

2424

2227

return

2425

2228

2426

2229

if client.approved or not client.approval_delay:

2427

# We are approved or approval is disabled

2230

#We are approved or approval is disabled

2428

2231

break

2429

2232

elif client.approved is None:

2430

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

2431

client.name)

2233

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

2234

client.name)

2432

2235

if self.server.use_dbus:

2433

2236

# Emit D-Bus signal

2434

2237

client.NeedApproval(

2435

2238

client.approval_delay.total_seconds()

2436

2239

* 1000, client.approved_by_default)

2437

2240

else:

2438

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

2439

client.name)

2241

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

2242

client.name)

2440

2243

if self.server.use_dbus:

2441

2244

# Emit D-Bus signal

2442

2245

client.Rejected("Denied")

2443

2246

return

2444

2445

# wait until timeout or approved

2247

2248

#wait until timeout or approved

2446

2249

time = datetime.datetime.now()

2447

2250

client.changedstate.acquire()

2448

2251

client.changedstate.wait(delay.total_seconds())

2450

2253

time2 = datetime.datetime.now()

2451

2254

if (time2 - time) >= delay:

2452

2255

if not client.approved_by_default:

2453

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

2454

" waiting for approval",

2455

client.name)

2256

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

2257

" waiting for approval",

2258

client.name)

2456

2259

if self.server.use_dbus:

2457

2260

# Emit D-Bus signal

2458

2261

client.Rejected("Approval timed out")

2461

2264

break

2462

2265

else:

2463

2266

delay -= time2 - time

2464

2267

2465

2268

try:

2466

2269

session.send(client.secret)

2467

2270

except gnutls.Error as error:

2468

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

2271

logger.warning("gnutls send failed",

2272

exc_info = error)

2469

2273

return

2470

2471

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

2274

2275

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

2472

2276

# bump the timeout using extended_timeout

2473

2277

client.bump_timeout(client.extended_timeout)

2474

2278

if self.server.use_dbus:

2475

2279

# Emit D-Bus signal

2476

2280

client.GotSecret()

2477

2281

2478

2282

finally:

2479

2283

if approval_required:

2480

2284

client.approvals_pending -= 1

2481

2285

try:

2482

2286

session.bye()

2483

2287

except gnutls.Error as error:

2484

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

2485

2288

logger.warning("GnuTLS bye failed",

2289

exc_info=error)

2290

2486

2291

@staticmethod

2487

2292

def peer_certificate(session):

2488

"Return the peer's certificate as a bytestring"

2489

try:

2490

cert_type = gnutls.certificate_type_get2(

2491

session, gnutls.CTYPE_PEERS)

2492

except AttributeError:

2493

cert_type = gnutls.certificate_type_get(session)

2494

if gnutls.has_rawpk:

2495

valid_cert_types = frozenset((gnutls.CRT_RAWPK,))

2496

else:

2497

valid_cert_types = frozenset((gnutls.CRT_OPENPGP,))

2498

# If not a valid certificate type...

2499

if cert_type not in valid_cert_types:

2500

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

2501

valid_cert_types)

2293

"Return the peer's OpenPGP certificate as a bytestring"

2294

# If not an OpenPGP certificate...

2295

if (gnutls.certificate_type_get(session._c_object)

2296

!= gnutls.CRT_OPENPGP):

2502

2297

# ...return invalid data

2503

2298

return b""

2504

2299

list_size = ctypes.c_uint(1)

2505

2300

cert_list = (gnutls.certificate_get_peers

2506

(session, ctypes.byref(list_size)))

2301

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

2507

2302

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

2508

2303

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

2509

2304

if list_size.value == 0:

2510

2305

return None

2511

2306

cert = cert_list[0]

2512

2307

return ctypes.string_at(cert.data, cert.size)

2513

2514

@staticmethod

2515

def key_id(certificate):

2516

"Convert a certificate bytestring to a hexdigit key ID"

2517

# New GnuTLS "datum" with the public key

2518

datum = gnutls.datum_t(

2519

ctypes.cast(ctypes.c_char_p(certificate),

2520

ctypes.POINTER(ctypes.c_ubyte)),

2521

ctypes.c_uint(len(certificate)))

2522

# XXX all these need to be created in the gnutls "module"

2523

# New empty GnuTLS certificate

2524

pubkey = gnutls.pubkey_t()

2525

gnutls.pubkey_init(ctypes.byref(pubkey))

2526

# Import the raw public key into the certificate

2527

gnutls.pubkey_import(pubkey,

2528

ctypes.byref(datum),

2529

gnutls.X509_FMT_DER)

2530

# New buffer for the key ID

2531

buf = ctypes.create_string_buffer(32)

2532

buf_len = ctypes.c_size_t(len(buf))

2533

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

2534

gnutls.pubkey_get_key_id(

2535

pubkey,

2536

gnutls.KEYID_USE_SHA256,

2537

ctypes.cast(ctypes.byref(buf),

2538

ctypes.POINTER(ctypes.c_ubyte)),

2539

ctypes.byref(buf_len))

2540

# Deinit the certificate

2541

gnutls.pubkey_deinit(pubkey)

2542

2543

# Convert the buffer to a Python bytestring

2544

key_id = ctypes.string_at(buf, buf_len.value)

2545

# Convert the bytestring to hexadecimal notation

2546

hex_key_id = binascii.hexlify(key_id).upper()

2547

return hex_key_id

2548

2308

2549

2309

@staticmethod

2550

2310

def fingerprint(openpgp):

2551

2311

"Convert an OpenPGP bytestring to a hexdigit fingerprint"

2566

2326

ctypes.byref(crtverify))

2567

2327

if crtverify.value != 0:

2568

2328

gnutls.openpgp_crt_deinit(crt)

2569

raise gnutls.CertificateSecurityError(code

2570

=crtverify.value)

2329

raise gnutls.CertificateSecurityError("Verify failed")

2571

2330

# New buffer for the fingerprint

2572

2331

buf = ctypes.create_string_buffer(20)

2573

2332

buf_len = ctypes.c_size_t()

2583

2342

return hex_fpr

2584

2343

2585

2344

2586

class MultiprocessingMixIn:

2345

class MultiprocessingMixIn(object):

2587

2346

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

2588

2347

2589

2348

def sub_process_main(self, request, address):

2590

2349

try:

2591

2350

self.finish_request(request, address)

2592

2351

except Exception:

2593

2352

self.handle_error(request, address)

2594

2353

self.close_request(request)

2595

2354

2596

2355

def process_request(self, request, address):

2597

2356

"""Start a new process to process the request."""

2598

proc = multiprocessing.Process(target=self.sub_process_main,

2599

args=(request, address))

2357

proc = multiprocessing.Process(target = self.sub_process_main,

2358

args = (request, address))

2600

2359

proc.start()

2601

2360

return proc

2602

2361

2603

2362

2604

class MultiprocessingMixInWithPipe(MultiprocessingMixIn):

2363

class MultiprocessingMixInWithPipe(MultiprocessingMixIn, object):

2605

2364

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

2606

2365

2607

2366

def process_request(self, request, client_address):

2608

2367

"""Overrides and wraps the original process_request().

2609

2368

2610

2369

This function creates a new pipe in self.pipe

2611

2370

"""

2612

2371

parent_pipe, self.child_pipe = multiprocessing.Pipe()

2613

2372

2614

2373

proc = MultiprocessingMixIn.process_request(self, request,

2615

2374

client_address)

2616

2375

self.child_pipe.close()

2617

2376

self.add_pipe(parent_pipe, proc)

2618

2377

2619

2378

def add_pipe(self, parent_pipe, proc):

2620

2379

"""Dummy function; override as necessary"""

2621

2380

raise NotImplementedError()

2622

2381

2623

2382

2624

2383

class IPv6_TCPServer(MultiprocessingMixInWithPipe,

2625

socketserver.TCPServer):

2626

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

2627

2384

socketserver.TCPServer, object):

2385

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

2386

2628

2387

Attributes:

2629

2388

enabled: Boolean; whether this server is activated yet

2630

2389

interface: None or a network interface name (string)

2631

2390

use_ipv6: Boolean; to use IPv6 or not

2632

2391

"""

2633

2392

2634

2393

def __init__(self, server_address, RequestHandlerClass,

2635

2394

interface=None,

2636

2395

use_ipv6=True,

2646

2405

self.socketfd = socketfd

2647

2406

# Save the original socket.socket() function

2648

2407

self.socket_socket = socket.socket

2649

2650

2408

# To implement --socket, we monkey patch socket.socket.

2651

#

2409

#

2652

2410

# (When socketserver.TCPServer is a new-style class, we

2653

2411

# could make self.socket into a property instead of monkey

2654

2412

# patching socket.socket.)

2655

#

2413

#

2656

2414

# Create a one-time-only replacement for socket.socket()

2657

2415

@functools.wraps(socket.socket)

2658

2416

def socket_wrapper(*args, **kwargs):

2670

2428

# socket_wrapper(), if socketfd was set.

2671

2429

socketserver.TCPServer.__init__(self, server_address,

2672

2430

RequestHandlerClass)

2673

2431

2674

2432

def server_bind(self):

2675

2433

"""This overrides the normal server_bind() function

2676

2434

to bind to an interface if one was specified, and also NOT to

2677

2435

bind to an address or port if they were not specified."""

2678

global SO_BINDTODEVICE

2679

2436

if self.interface is not None:

2680

2437

if SO_BINDTODEVICE is None:

2681

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

2682

# common enough.

2683

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

2684

SO_BINDTODEVICE = 25

2685

try:

2686

self.socket.setsockopt(

2687

socket.SOL_SOCKET, SO_BINDTODEVICE,

2688

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

2689

except socket.error as error:

2690

if error.errno == errno.EPERM:

2691

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

2692

self.interface)

2693

elif error.errno == errno.ENOPROTOOPT:

2694

log.error("SO_BINDTODEVICE not available; cannot"

2695

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

2696

elif error.errno == errno.ENODEV:

2697

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

2698

" bind", self.interface)

2699

else:

2700

raise

2438

logger.error("SO_BINDTODEVICE does not exist;"

2439

" cannot bind to interface %s",

2440

self.interface)

2441

else:

2442

try:

2443

self.socket.setsockopt(

2444

socket.SOL_SOCKET, SO_BINDTODEVICE,

2445

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

2446

except socket.error as error:

2447

if error.errno == errno.EPERM:

2448

logger.error("No permission to bind to"

2449

" interface %s", self.interface)

2450

elif error.errno == errno.ENOPROTOOPT:

2451

logger.error("SO_BINDTODEVICE not available;"

2452

" cannot bind to interface %s",

2453

self.interface)

2454

elif error.errno == errno.ENODEV:

2455

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

2456

" cannot bind", self.interface)

2457

else:

2458

raise

2701

2459

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

2702

2460

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

2703

if self.server_address[1]:

2704

self.allow_reuse_address = True

2705

2461

if not self.server_address[0]:

2706

2462

if self.address_family == socket.AF_INET6:

2707

any_address = "::" # in6addr_any

2463

any_address = "::" # in6addr_any

2708

2464

else:

2709

any_address = "0.0.0.0" # INADDR_ANY

2465

any_address = "0.0.0.0" # INADDR_ANY

2710

2466

self.server_address = (any_address,

2711

2467

self.server_address[1])

2712

2468

elif not self.server_address[1]:

2722

2478

2723

2479

class MandosServer(IPv6_TCPServer):

2724

2480

"""Mandos server.

2725

2481

2726

2482

Attributes:

2727

2483

clients: set of Client objects

2728

2484

gnutls_priority GnuTLS priority string

2729

2485

use_dbus: Boolean; to emit D-Bus signals or not

2730

2486

2731

2487

Assumes a GLib.MainLoop event loop.

2732

2488

"""

2733

2489

2734

2490

def __init__(self, server_address, RequestHandlerClass,

2735

2491

interface=None,

2736

2492

use_ipv6=True,

2746

2502

self.gnutls_priority = gnutls_priority

2747

2503

IPv6_TCPServer.__init__(self, server_address,

2748

2504

RequestHandlerClass,

2749

interface=interface,

2750

use_ipv6=use_ipv6,

2751

socketfd=socketfd)

2752

2505

interface = interface,

2506

use_ipv6 = use_ipv6,

2507

socketfd = socketfd)

2508

2753

2509

def server_activate(self):

2754

2510

if self.enabled:

2755

2511

return socketserver.TCPServer.server_activate(self)

2756

2512

2757

2513

def enable(self):

2758

2514

self.enabled = True

2759

2515

2760

2516

def add_pipe(self, parent_pipe, proc):

2761

2517

# Call "handle_ipc" for both data and EOF events

2762

2518

GLib.io_add_watch(

2763

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

2764

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

2519

parent_pipe.fileno(),

2520

GLib.IO_IN | GLib.IO_HUP,

2765

2521

functools.partial(self.handle_ipc,

2766

parent_pipe=parent_pipe,

2767

proc=proc))

2768

2522

parent_pipe = parent_pipe,

2523

proc = proc))

2524

2769

2525

def handle_ipc(self, source, condition,

2770

2526

parent_pipe=None,

2771

proc=None,

2527

proc = None,

2772

2528

client_object=None):

2773

2529

# error, or the other end of multiprocessing.Pipe has closed

2774

2530

if condition & (GLib.IO_ERR | GLib.IO_HUP):

2775

2531

# Wait for other process to exit

2776

2532

proc.join()

2777

2533

return False

2778

2534

2779

2535

# Read a request from the child

2780

2536

request = parent_pipe.recv()

2781

2537

command = request[0]

2782

2783

if command == "init":

2784

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

2785

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

2786

address = request[3]

2787

2538

2539

if command == 'init':

2540

fpr = request[1]

2541

address = request[2]

2542

2788

2543

for c in self.clients.values():

2789

if key_id == ("E3B0C44298FC1C149AFBF4C8996FB924"

2790

"27AE41E4649B934CA495991B7852B855"):

2791

continue

2792

if key_id and c.key_id == key_id:

2793

client = c

2794

break

2795

if fpr and c.fingerprint == fpr:

2544

if c.fingerprint == fpr:

2796

2545

client = c

2797

2546

break

2798

2547

else:

2799

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

2800

" %s", key_id or fpr, address)

2548

logger.info("Client not found for fingerprint: %s, ad"

2549

"dress: %s", fpr, address)

2801

2550

if self.use_dbus:

2802

2551

# Emit D-Bus signal

2803

mandos_dbus_service.ClientNotFound(key_id or fpr,

2552

mandos_dbus_service.ClientNotFound(fpr,

2804

2553

address[0])

2805

2554

parent_pipe.send(False)

2806

2555

return False

2807

2556

2808

2557

GLib.io_add_watch(

2809

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

2810

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

2558

parent_pipe.fileno(),

2559

GLib.IO_IN | GLib.IO_HUP,

2811

2560

functools.partial(self.handle_ipc,

2812

parent_pipe=parent_pipe,

2813

proc=proc,

2814

client_object=client))

2561

parent_pipe = parent_pipe,

2562

proc = proc,

2563

client_object = client))

2815

2564

parent_pipe.send(True)

2816

2565

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

2817

2566

# same fileno

2818

2567

return False

2819

if command == "funcall":

2568

if command == 'funcall':

2820

2569

funcname = request[1]

2821

2570

args = request[2]

2822

2571

kwargs = request[3]

2823

2824

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

2572

2573

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

2825

2574

funcname)(*args,

2826

2575

**kwargs)))

2827

2828

if command == "getattr":

2576

2577

if command == 'getattr':

2829

2578

attrname = request[1]

2830

2579

if isinstance(client_object.__getattribute__(attrname),

2831

collections.abc.Callable):

2832

parent_pipe.send(("function", ))

2580

collections.Callable):

2581

parent_pipe.send(('function', ))

2833

2582

else:

2834

2583

parent_pipe.send((

2835

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

2836

2837

if command == "setattr":

2584

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

2585

2586

if command == 'setattr':

2838

2587

attrname = request[1]

2839

2588

value = request[2]

2840

2589

setattr(client_object, attrname, value)

2841

2590

2842

2591

return True

2843

2592

2844

2593

2845

2594

def rfc3339_duration_to_delta(duration):

2846

2595

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

2847

2848

>>> timedelta = datetime.timedelta

2849

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

2850

True

2851

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

2852

True

2853

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

2854

True

2855

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

2856

True

2857

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

2858

True

2859

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

2860

True

2861

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

2862

True

2863

>>> del timedelta

2596

2597

>>> rfc3339_duration_to_delta("P7D")

2598

datetime.timedelta(7)

2599

>>> rfc3339_duration_to_delta("PT60S")

2600

datetime.timedelta(0, 60)

2601

>>> rfc3339_duration_to_delta("PT60M")

2602

datetime.timedelta(0, 3600)

2603

>>> rfc3339_duration_to_delta("PT24H")

2604

datetime.timedelta(1)

2605

>>> rfc3339_duration_to_delta("P1W")

2606

datetime.timedelta(7)

2607

>>> rfc3339_duration_to_delta("PT5M30S")

2608

datetime.timedelta(0, 330)

2609

>>> rfc3339_duration_to_delta("P1DT3M20S")

2610

datetime.timedelta(1, 200)

2864

2611

"""

2865

2612

2866

2613

# Parsing an RFC 3339 duration with regular expressions is not

2867

2614

# possible - there would have to be multiple places for the same

2868

2615

# values, like seconds. The current code, while more esoteric, is

2869

2616

# cleaner without depending on a parsing library. If Python had a

2870

2617

# built-in library for parsing we would use it, but we'd like to

2871

2618

# avoid excessive use of external libraries.

2872

2619

2873

2620

# New type for defining tokens, syntax, and semantics all-in-one

2874

2621

Token = collections.namedtuple("Token", (

2875

2622

"regexp", # To match token; if "value" is not None, must have

2908

2655

frozenset((token_year, token_month,

2909

2656

token_day, token_time,

2910

2657

token_week)))

2911

# Define starting values:

2912

# Value so far

2913

value = datetime.timedelta()

2658

# Define starting values

2659

value = datetime.timedelta() # Value so far

2914

2660

found_token = None

2915

# Following valid tokens

2916

followers = frozenset((token_duration, ))

2917

# String left to parse

2918

s = duration

2661

followers = frozenset((token_duration, )) # Following valid tokens

2662

s = duration # String left to parse

2919

2663

# Loop until end token is found

2920

2664

while found_token is not token_end:

2921

2665

# Search for any currently valid tokens

2945

2689

2946

2690

def string_to_delta(interval):

2947

2691

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

2948

2949

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

2950

True

2951

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

2952

True

2953

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

2954

True

2955

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

2956

True

2957

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

2958

True

2959

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

2960

True

2692

2693

>>> string_to_delta('7d')

2694

datetime.timedelta(7)

2695

>>> string_to_delta('60s')

2696

datetime.timedelta(0, 60)

2697

>>> string_to_delta('60m')

2698

datetime.timedelta(0, 3600)

2699

>>> string_to_delta('24h')

2700

datetime.timedelta(1)

2701

>>> string_to_delta('1w')

2702

datetime.timedelta(7)

2703

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

2704

datetime.timedelta(0, 330)

2961

2705

"""

2962

2706

2963

2707

try:

2964

2708

return rfc3339_duration_to_delta(interval)

2965

2709

except ValueError:

2966

2710

pass

2967

2711

2968

2712

timevalue = datetime.timedelta(0)

2969

2713

for s in interval.split():

2970

2714

try:

2988

2732

return timevalue

2989

2733

2990

2734

2991

def daemon(nochdir=False, noclose=False):

2735

def daemon(nochdir = False, noclose = False):

2992

2736

"""See daemon(3). Standard BSD Unix function.

2993

2737

2994

2738

This should really exist as os.daemon, but it doesn't (yet)."""

2995

2739

if os.fork():

2996

2740

sys.exit()

3014

2758

3015

2759

3016

2760

def main():

3017

2761

3018

2762

##################################################################

3019

2763

# Parsing of options, both command line and config file

3020

2764

3021

2765

parser = argparse.ArgumentParser()

3022

2766

parser.add_argument("-v", "--version", action="version",

3023

version="%(prog)s {}".format(version),

2767

version = "%(prog)s {}".format(version),

3024

2768

help="show version number and exit")

3025

2769

parser.add_argument("-i", "--interface", metavar="IF",

3026

2770

help="Bind to interface IF")

3062

2806

parser.add_argument("--no-zeroconf", action="store_false",

3063

2807

dest="zeroconf", help="Do not use Zeroconf",

3064

2808

default=None)

3065

2809

3066

2810

options = parser.parse_args()

3067

2811

2812

if options.check:

2813

import doctest

2814

fail_count, test_count = doctest.testmod()

2815

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

2816

3068

2817

# Default values for config file for server-global settings

3069

if gnutls.has_rawpk:

3070

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

3071

":!VERS-ALL:+VERS-TLS1.3:%PROFILE_ULTRA")

3072

else:

3073

priority = ("SECURE256:!CTYPE-X.509:+CTYPE-OPENPGP:!RSA"

3074

":+SIGN-DSA-SHA256")

3075

server_defaults = {"interface": "",

3076

"address": "",

3077

"port": "",

3078

"debug": "False",

3079

"priority": priority,

3080

"servicename": "Mandos",

3081

"use_dbus": "True",

3082

"use_ipv6": "True",

3083

"debuglevel": "",

3084

"restore": "True",

3085

"socket": "",

3086

"statedir": "/var/lib/mandos",

3087

"foreground": "False",

3088

"zeroconf": "True",

3089

}

3090

del priority

3091

2818

server_defaults = { "interface": "",

2819

"address": "",

2820

"port": "",

2821

"debug": "False",

2822

"priority":

2823

"SECURE256:!CTYPE-X.509:+CTYPE-OPENPGP:!RSA"

2824

":+SIGN-DSA-SHA256",

2825

"servicename": "Mandos",

2826

"use_dbus": "True",

2827

"use_ipv6": "True",

2828

"debuglevel": "",

2829

"restore": "True",

2830

"socket": "",

2831

"statedir": "/var/lib/mandos",

2832

"foreground": "False",

2833

"zeroconf": "True",

2834

}

2835

3092

2836

# Parse config file for server-global settings

3093

server_config = configparser.ConfigParser(server_defaults)

2837

server_config = configparser.SafeConfigParser(server_defaults)

3094

2838

del server_defaults

3095

2839

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

3096

# Convert the ConfigParser object to a dict

2840

# Convert the SafeConfigParser object to a dict

3097

2841

server_settings = server_config.defaults()

3098

2842

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

3099

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

3100

"foreground", "zeroconf"):

2843

for option in ("debug", "use_dbus", "use_ipv6", "foreground"):

3101

2844

server_settings[option] = server_config.getboolean("DEFAULT",

3102

2845

option)

3103

2846

if server_settings["port"]:

3109

2852

# Later, stdin will, and stdout and stderr might, be dup'ed

3110

2853

# over with an opened os.devnull. But we don't want this to

3111

2854

# happen with a supplied network socket.

3112

while 0 <= server_settings["socket"] <= 2:

2855

if 0 <= server_settings["socket"] <= 2:

3113

2856

server_settings["socket"] = os.dup(server_settings

3114

2857

["socket"])

3115

os.set_inheritable(server_settings["socket"], False)

3116

2858

del server_config

3117

2859

3118

2860

# Override the settings from the config file with command line

3119

2861

# options, if set.

3120

2862

for option in ("interface", "address", "port", "debug",

3138

2880

if server_settings["debug"]:

3139

2881

server_settings["foreground"] = True

3140

2882

# Now we have our good server settings in "server_settings"

3141

2883

3142

2884

##################################################################

3143

2885

3144

2886

if (not server_settings["zeroconf"]

3145

2887

and not (server_settings["port"]

3146

2888

or server_settings["socket"] != "")):

3147

2889

parser.error("Needs port or socket to work without Zeroconf")

3148

2890

3149

2891

# For convenience

3150

2892

debug = server_settings["debug"]

3151

2893

debuglevel = server_settings["debuglevel"]

3155

2897

stored_state_file)

3156

2898

foreground = server_settings["foreground"]

3157

2899

zeroconf = server_settings["zeroconf"]

3158

2900

3159

2901

if debug:

3160

2902

initlogger(debug, logging.DEBUG)

3161

2903

else:

3164

2906

else:

3165

2907

level = getattr(logging, debuglevel.upper())

3166

2908

initlogger(debug, level)

3167

2909

3168

2910

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

3169

2911

syslogger.setFormatter(

3170

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

3171

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

2912

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

2913

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

3172

2914

server_settings["servicename"])))

3173

2915

3174

2916

# Parse config file with clients

3175

client_config = configparser.ConfigParser(Client.client_defaults)

2917

client_config = configparser.SafeConfigParser(Client

2918

.client_defaults)

3176

2919

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

3177

2920

"clients.conf"))

3178

2921

3179

2922

global mandos_dbus_service

3180

2923

mandos_dbus_service = None

3181

2924

3182

2925

socketfd = None

3183

2926

if server_settings["socket"] != "":

3184

2927

socketfd = server_settings["socket"]

3198

2941

try:

3199

2942

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

3200

2943

except IOError as e:

3201

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

3202

exc_info=e)

3203

2944

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

2945

exc_info=e)

2946

3204

2947

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

3205

2948

("mandos", "mandos"),

3206

2949

("nobody", "nogroup")):

3216

2959

try:

3217

2960

os.setgid(gid)

3218

2961

os.setuid(uid)

3219

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

2962

if debug:

2963

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

2964

gid))

3220

2965

except OSError as error:

3221

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

3222

os.strerror(error.errno))

2966

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

2967

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

3223

2968

if error.errno != errno.EPERM:

3224

2969

raise

3225

2970

3226

2971

if debug:

3227

2972

# Enable all possible GnuTLS debugging

3228

2973

3229

2974

# "Use a log level over 10 to enable all debugging options."

3230

2975

# - GnuTLS manual

3231

2976

gnutls.global_set_log_level(11)

3232

2977

3233

2978

@gnutls.log_func

3234

2979

def debug_gnutls(level, string):

3235

log.debug("GnuTLS: %s",

3236

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

3237

2980

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

2981

3238

2982

gnutls.global_set_log_function(debug_gnutls)

3239

2983

3240

2984

# Redirect stdin so all checkers get /dev/null

3241

2985

null = os.open(os.devnull, os.O_NOCTTY | os.O_RDWR)

3242

2986

os.dup2(null, sys.stdin.fileno())

3243

2987

if null > 2:

3244

2988

os.close(null)

3245

2989

3246

2990

# Need to fork before connecting to D-Bus

3247

2991

if not foreground:

3248

2992

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

3249

2993

daemon()

3250

3251

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

3252

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

3253

# need to inform GLib that threads will be used.

3254

GLib.threads_init()

3255

2994

2995

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

2996

# to inform GLib that threads will be used.

2997

GLib.threads_init()

2998

3256

2999

global main_loop

3257

3000

# From the Avahi example code

3258

3001

DBusGMainLoop(set_as_default=True)

3259

3002

main_loop = GLib.MainLoop()

3260

if use_dbus or zeroconf:

3261

bus = dbus.SystemBus()

3003

bus = dbus.SystemBus()

3262

3004

# End of Avahi example code

3263

3005

if use_dbus:

3264

3006

try:

3269

3011

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

3270

3012

do_not_queue=True)

3271

3013

except dbus.exceptions.DBusException as e:

3272

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

3014

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

3273

3015

use_dbus = False

3274

3016

server_settings["use_dbus"] = False

3275

3017

tcp_server.use_dbus = False

3276

3018

if zeroconf:

3277

3019

protocol = avahi.PROTO_INET6 if use_ipv6 else avahi.PROTO_INET

3278

3020

service = AvahiServiceToSyslog(

3279

name=server_settings["servicename"],

3280

servicetype="_mandos._tcp",

3281

protocol=protocol,

3282

bus=bus)

3021

name = server_settings["servicename"],

3022

servicetype = "_mandos._tcp",

3023

protocol = protocol,

3024

bus = bus)

3283

3025

if server_settings["interface"]:

3284

3026

service.interface = if_nametoindex(

3285

3027

server_settings["interface"].encode("utf-8"))

3286

3028

3287

3029

global multiprocessing_manager

3288

3030

multiprocessing_manager = multiprocessing.Manager()

3289

3031

3290

3032

client_class = Client

3291

3033

if use_dbus:

3292

client_class = functools.partial(ClientDBus, bus=bus)

3293

3034

client_class = functools.partial(ClientDBus, bus = bus)

3035

3294

3036

client_settings = Client.config_parser(client_config)

3295

3037

old_client_settings = {}

3296

3038

clients_data = {}

3297

3039

3298

3040

# This is used to redirect stdout and stderr for checker processes

3299

3041

global wnull

3300

wnull = open(os.devnull, "w") # A writable /dev/null

3042

wnull = open(os.devnull, "w") # A writable /dev/null

3301

3043

# Only used if server is running in foreground but not in debug

3302

3044

# mode

3303

3045

if debug or not foreground:

3304

3046

wnull.close()

3305

3047

3306

3048

# Get client data and settings from last running state.

3307

3049

if server_settings["restore"]:

3308

3050

try:

3309

3051

with open(stored_state_path, "rb") as stored_state:

3310

if sys.version_info.major == 2:

3052

if sys.version_info.major == 2:

3311

3053

clients_data, old_client_settings = pickle.load(

3312

3054

stored_state)

3313

3055

else:

3314

3056

bytes_clients_data, bytes_old_client_settings = (

3315

pickle.load(stored_state, encoding="bytes"))

3316

# Fix bytes to strings

3317

# clients_data

3057

pickle.load(stored_state, encoding = "bytes"))

3058

### Fix bytes to strings

3059

## clients_data

3318

3060

# .keys()

3319

clients_data = {(key.decode("utf-8")

3320

if isinstance(key, bytes)

3321

else key): value

3322

for key, value in

3323

bytes_clients_data.items()}

3061

clients_data = { (key.decode("utf-8")

3062

if isinstance(key, bytes)

3063

else key): value

3064

for key, value in

3065

bytes_clients_data.items() }

3324

3066

del bytes_clients_data

3325

3067

for key in clients_data:

3326

value = {(k.decode("utf-8")

3327

if isinstance(k, bytes) else k): v

3328

for k, v in

3329

clients_data[key].items()}

3068

value = { (k.decode("utf-8")

3069

if isinstance(k, bytes) else k): v

3070

for k, v in

3071

clients_data[key].items() }

3330

3072

clients_data[key] = value

3331

3073

# .client_structure

3332

3074

value["client_structure"] = [

3333

3075

(s.decode("utf-8")

3334

3076

if isinstance(s, bytes)

3335

3077

else s) for s in

3336

value["client_structure"]]

3337

# .name, .host, and .checker_command

3338

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

3078

value["client_structure"] ]

3079

# .name & .host

3080

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

3339

3081

if isinstance(value[k], bytes):

3340

3082

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

3341

if "key_id" not in value:

3342

value["key_id"] = ""

3343

elif "fingerprint" not in value:

3344

value["fingerprint"] = ""

3345

# old_client_settings

3083

## old_client_settings

3346

3084

# .keys()

3347

3085

old_client_settings = {

3348

3086

(key.decode("utf-8")

3349

3087

if isinstance(key, bytes)

3350

3088

else key): value

3351

3089

for key, value in

3352

bytes_old_client_settings.items()}

3090

bytes_old_client_settings.items() }

3353

3091

del bytes_old_client_settings

3354

# .host and .checker_command

3092

# .host

3355

3093

for value in old_client_settings.values():

3356

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

3357

if isinstance(value[attribute], bytes):

3358

value[attribute] = (value[attribute]

3359

.decode("utf-8"))

3094

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

3095

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

3096

.decode("utf-8"))

3360

3097

os.remove(stored_state_path)

3361

3098

except IOError as e:

3362

3099

if e.errno == errno.ENOENT:

3363

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

3364

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

3100

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

3101

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

3365

3102

else:

3366

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

3367

exc_info=e)

3103

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

3104

exc_info=e)

3368

3105

raise

3369

3106

except EOFError as e:

3370

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

3371

exc_info=e)

3372

3107

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

3108

"EOFError:",

3109

exc_info=e)

3110

3373

3111

with PGPEngine() as pgp:

3374

3112

for client_name, client in clients_data.items():

3375

3113

# Skip removed clients

3376

3114

if client_name not in client_settings:

3377

3115

continue

3378

3116

3379

3117

# Decide which value to use after restoring saved state.

3380

3118

# We have three different values: Old config file,

3381

3119

# new config file, and saved state.

3392

3130

client[name] = value

3393

3131

except KeyError:

3394

3132

pass

3395

3133

3396

3134

# Clients who has passed its expire date can still be

3397

3135

# enabled if its last checker was successful. A Client

3398

3136

# whose checker succeeded before we stored its state is

3401

3139

if client["enabled"]:

3402

3140

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

3403

3141

if not client["last_checked_ok"]:

3404

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

3405

" never performed a successful"

3406

" checker", client_name)

3142

logger.warning(

3143

"disabling client {} - Client never "

3144

"performed a successful checker".format(

3145

client_name))

3407

3146

client["enabled"] = False

3408

3147

elif client["last_checker_status"] != 0:

3409

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

3410

" last checker failed with error"

3411

" code %s", client_name,

3412

client["last_checker_status"])

3148

logger.warning(

3149

"disabling client {} - Client last"

3150

" checker failed with error code"

3151

" {}".format(

3152

client_name,

3153

client["last_checker_status"]))

3413

3154

client["enabled"] = False

3414

3155

else:

3415

3156

client["expires"] = (

3416

3157

datetime.datetime.utcnow()

3417

3158

+ client["timeout"])

3418

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

3419

" enabled", client_name)

3159

logger.debug("Last checker succeeded,"

3160

" keeping {} enabled".format(

3161

client_name))

3420

3162

try:

3421

3163

client["secret"] = pgp.decrypt(

3422

3164

client["encrypted_secret"],

3423

3165

client_settings[client_name]["secret"])

3424

3166

except PGPError:

3425

3167

# If decryption fails, we use secret from new settings

3426

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

3427

client_name)

3168

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

3169

client_name))

3428

3170

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

3429

3171

["secret"])

3430

3172

3431

3173

# Add/remove clients based on new changes made to config

3432

3174

for client_name in (set(old_client_settings)

3433

3175

- set(client_settings)):

3435

3177

for client_name in (set(client_settings)

3436

3178

- set(old_client_settings)):

3437

3179

clients_data[client_name] = client_settings[client_name]

3438

3180

3439

3181

# Create all client objects

3440

3182

for client_name, client in clients_data.items():

3441

3183

tcp_server.clients[client_name] = client_class(

3442

name=client_name,

3443

settings=client,

3444

server_settings=server_settings)

3445

3184

name = client_name,

3185

settings = client,

3186

server_settings = server_settings)

3187

3446

3188

if not tcp_server.clients:

3447

log.warning("No clients defined")

3448

3189

logger.warning("No clients defined")

3190

3449

3191

if not foreground:

3450

3192

if pidfile is not None:

3451

3193

pid = os.getpid()

3453

3195

with pidfile:

3454

3196

print(pid, file=pidfile)

3455

3197

except IOError:

3456

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

3457

pidfilename, pid)

3198

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

3199

pidfilename, pid)

3458

3200

del pidfile

3459

3201

del pidfilename

3460

3202

3461

3203

for termsig in (signal.SIGHUP, signal.SIGTERM):

3462

3204

GLib.unix_signal_add(GLib.PRIORITY_HIGH, termsig,

3463

3205

lambda: main_loop.quit() and False)

3464

3206

3465

3207

if use_dbus:

3466

3208

3467

3209

@alternate_dbus_interfaces(

3468

{"se.recompile.Mandos": "se.bsnet.fukt.Mandos"})

3210

{ "se.recompile.Mandos": "se.bsnet.fukt.Mandos" })

3469

3211

class MandosDBusService(DBusObjectWithObjectManager):

3470

3212

"""A D-Bus proxy object"""

3471

3213

3472

3214

def __init__(self):

3473

3215

dbus.service.Object.__init__(self, bus, "/")

3474

3216

3475

3217

_interface = "se.recompile.Mandos"

3476

3218

3477

3219

@dbus.service.signal(_interface, signature="o")

3478

3220

def ClientAdded(self, objpath):

3479

3221

"D-Bus signal"

3480

3222

pass

3481

3223

3482

3224

@dbus.service.signal(_interface, signature="ss")

3483

def ClientNotFound(self, key_id, address):

3225

def ClientNotFound(self, fingerprint, address):

3484

3226

"D-Bus signal"

3485

3227

pass

3486

3228

3487

3229

@dbus_annotations({"org.freedesktop.DBus.Deprecated":

3488

3230

"true"})

3489

3231

@dbus.service.signal(_interface, signature="os")

3490

3232

def ClientRemoved(self, objpath, name):

3491

3233

"D-Bus signal"

3492

3234

pass

3493

3235

3494

3236

@dbus_annotations({"org.freedesktop.DBus.Deprecated":

3495

3237

"true"})

3496

3238

@dbus.service.method(_interface, out_signature="ao")

3498

3240

"D-Bus method"

3499

3241

return dbus.Array(c.dbus_object_path for c in

3500

3242

tcp_server.clients.values())

3501

3243

3502

3244

@dbus_annotations({"org.freedesktop.DBus.Deprecated":

3503

3245

"true"})

3504

3246

@dbus.service.method(_interface,

3506

3248

def GetAllClientsWithProperties(self):

3507

3249

"D-Bus method"

3508

3250

return dbus.Dictionary(

3509

{c.dbus_object_path: c.GetAll(

3251

{ c.dbus_object_path: c.GetAll(

3510

3252

"se.recompile.Mandos.Client")

3511

for c in tcp_server.clients.values()},

3253

for c in tcp_server.clients.values() },

3512

3254

signature="oa{sv}")

3513

3255

3514

3256

@dbus.service.method(_interface, in_signature="o")

3515

3257

def RemoveClient(self, object_path):

3516

3258

"D-Bus method"

3524

3266

self.client_removed_signal(c)

3525

3267

return

3526

3268

raise KeyError(object_path)

3527

3269

3528

3270

del _interface

3529

3271

3530

3272

@dbus.service.method(dbus.OBJECT_MANAGER_IFACE,

3531

out_signature="a{oa{sa{sv}}}")

3273

out_signature = "a{oa{sa{sv}}}")

3532

3274

def GetManagedObjects(self):

3533

3275

"""D-Bus method"""

3534

3276

return dbus.Dictionary(

3535

{client.dbus_object_path:

3536

dbus.Dictionary(

3537

{interface: client.GetAll(interface)

3538

for interface in

3539

client._get_all_interface_names()})

3540

for client in tcp_server.clients.values()})

3541

3277

{ client.dbus_object_path:

3278

dbus.Dictionary(

3279

{ interface: client.GetAll(interface)

3280

for interface in

3281

client._get_all_interface_names()})

3282

for client in tcp_server.clients.values()})

3283

3542

3284

def client_added_signal(self, client):

3543

3285

"""Send the new standard signal and the old signal"""

3544

3286

if use_dbus:

3546

3288

self.InterfacesAdded(

3547

3289

client.dbus_object_path,

3548

3290

dbus.Dictionary(

3549

{interface: client.GetAll(interface)

3550

for interface in

3551

client._get_all_interface_names()}))

3291

{ interface: client.GetAll(interface)

3292

for interface in

3293

client._get_all_interface_names()}))

3552

3294

# Old signal

3553

3295

self.ClientAdded(client.dbus_object_path)

3554

3296

3555

3297

def client_removed_signal(self, client):

3556

3298

"""Send the new standard signal and the old signal"""

3557

3299

if use_dbus:

3562

3304

# Old signal

3563

3305

self.ClientRemoved(client.dbus_object_path,

3564

3306

client.name)

3565

3307

3566

3308

mandos_dbus_service = MandosDBusService()

3567

3568

# Save modules to variables to exempt the modules from being

3569

# unloaded before the function registered with atexit() is run.

3570

mp = multiprocessing

3571

wn = wnull

3572

3309

3573

3310

def cleanup():

3574

3311

"Cleanup function; run on exit"

3575

3312

if zeroconf:

3576

3313

service.cleanup()

3577

3578

mp.active_children()

3579

wn.close()

3314

3315

multiprocessing.active_children()

3316

wnull.close()

3580

3317

if not (tcp_server.clients or client_settings):

3581

3318

return

3582

3319

3583

3320

# Store client before exiting. Secrets are encrypted with key

3584

3321

# based on what config file has. If config file is

3585

3322

# removed/edited, old secret will thus be unrecovable.

3590

3327

client.encrypted_secret = pgp.encrypt(client.secret,

3591

3328

key)

3592

3329

client_dict = {}

3593

3330

3594

3331

# A list of attributes that can not be pickled

3595

3332

# + secret.

3596

exclude = {"bus", "changedstate", "secret",

3597

"checker", "server_settings"}

3333

exclude = { "bus", "changedstate", "secret",

3334

"checker", "server_settings" }

3598

3335

for name, typ in inspect.getmembers(dbus.service

3599

3336

.Object):

3600

3337

exclude.add(name)

3601

3338

3602

3339

client_dict["encrypted_secret"] = (client

3603

3340

.encrypted_secret)

3604

3341

for attr in client.client_structure:

3605

3342

if attr not in exclude:

3606

3343

client_dict[attr] = getattr(client, attr)

3607

3344

3608

3345

clients[client.name] = client_dict

3609

3346

del client_settings[client.name]["secret"]

3610

3347

3611

3348

try:

3612

3349

with tempfile.NamedTemporaryFile(

3613

mode="wb",

3350

mode='wb',

3614

3351

suffix=".pickle",

3615

prefix="clients-",

3352

prefix='clients-',

3616

3353

dir=os.path.dirname(stored_state_path),

3617

3354

delete=False) as stored_state:

3618

3355

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

3619

protocol=2)

3356

protocol = 2)

3620

3357

tempname = stored_state.name

3621

3358

os.rename(tempname, stored_state_path)

3622

3359

except (IOError, OSError) as e:

3626

3363

except NameError:

3627

3364

pass

3628

3365

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

3629

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

3630

os.strerror(e.errno))

3366

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

3367

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

3631

3368

else:

3632

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

3633

exc_info=e)

3369

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

3370

exc_info=e)

3634

3371

raise

3635

3372

3636

3373

# Delete all clients, and settings from config

3637

3374

while tcp_server.clients:

3638

3375

name, client = tcp_server.clients.popitem()

3644

3381

if use_dbus:

3645

3382

mandos_dbus_service.client_removed_signal(client)

3646

3383

client_settings.clear()

3647

3384

3648

3385

atexit.register(cleanup)

3649

3386

3650

3387

for client in tcp_server.clients.values():

3651

3388

if use_dbus:

3652

3389

# Emit D-Bus signal for adding

3653

3390

mandos_dbus_service.client_added_signal(client)

3654

3391

# Need to initiate checking of clients

3655

3392

if client.enabled:

3656

client.init_checker(randomize_start=True)

3657

3393

client.init_checker()

3394

3658

3395

tcp_server.enable()

3659

3396

tcp_server.server_activate()

3660

3397

3661

3398

# Find out what port we got

3662

3399

if zeroconf:

3663

3400

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

3664

3401

if use_ipv6:

3665

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

3666

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

3402

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

3403

" flowinfo %d, scope_id %d",

3404

*tcp_server.socket.getsockname())

3667

3405

else: # IPv4

3668

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

3669

*tcp_server.socket.getsockname())

3670

3671

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

3672

3406

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

3407

*tcp_server.socket.getsockname())

3408

3409

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

3410

3673

3411

try:

3674

3412

if zeroconf:

3675

3413

# From the Avahi example code

3676

3414

try:

3677

3415

service.activate()

3678

3416

except dbus.exceptions.DBusException as error:

3679

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

3417

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

3680

3418

cleanup()

3681

3419

sys.exit(1)

3682

3420

# End of Avahi example code

3683

3684

GLib.io_add_watch(

3685

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

3686

GLib.PRIORITY_DEFAULT, GLib.IO_IN,

3687

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

3688

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

3689

3690

log.debug("Starting main loop")

3421

3422

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

3423

lambda *args, **kwargs:

3424

(tcp_server.handle_request

3425

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

3426

3427

logger.debug("Starting main loop")

3691

3428

main_loop.run()

3692

3429

except AvahiError as error:

3693

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

3430

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

3694

3431

cleanup()

3695

3432

sys.exit(1)

3696

3433

except KeyboardInterrupt:

3697

3434

if debug:

3698

3435

print("", file=sys.stderr)

3699

log.debug("Server received KeyboardInterrupt")

3700

log.debug("Server exiting")

3436

logger.debug("Server received KeyboardInterrupt")

3437

logger.debug("Server exiting")

3701

3438

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

3702

3439

cleanup()

3703

3440

3704

3705

def parse_test_args():

3706

# type: () -> argparse.Namespace

3707

parser = argparse.ArgumentParser(add_help=False)

3708

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

3709

parser.add_argument("--prefix", )

3710

args, unknown_args = parser.parse_known_args()

3711

if args.check:

3712

# Remove test options from sys.argv

3713

sys.argv[1:] = unknown_args

3714

return args

3715

3716

# Add all tests from doctest strings

3717

def load_tests(loader, tests, none):

3718

import doctest

3719

tests.addTests(doctest.DocTestSuite())

3720

return tests

3721

3722

if __name__ == "__main__":

3723

options = parse_test_args()

3724

try:

3725

if options.check:

3726

extra_test_prefix = options.prefix

3727

if extra_test_prefix is not None:

3728

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

3729

.result.wasSuccessful()):

3730

sys.exit(1)

3731

class ExtraTestLoader(unittest.TestLoader):

3732

testMethodPrefix = extra_test_prefix

3733

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

3734

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

3735

else:

3736

unittest.main(argv=[""])

3737

else:

3738

main()

3739

finally:

3740

logging.shutdown()

3741

3742

# Local Variables:

3743

# run-tests:

3744

# (lambda (&optional extra)

3745

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

3746

# extra))

3747

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

3748

# (funcall remove-test-window)

3749

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

3750

# run-tests-in-test-buffer:

3751

# (lambda (dir &optional extra)

3752

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

3753

# (setq buffer-read-only nil

3754

# default-directory dir)

3755

# (erase-buffer)

3756

# (compilation-mode))

3757

# (let ((process-result

3758

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

3759

# (process-file-shell-command

3760

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

3761

# (and (numberp process-result)

3762

# (= process-result 0))))

3763

# get-command-line:

3764

# (lambda (&optional extra)

3765

# (let ((quoted-script

3766

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

3767

# (format

3768

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

3769

# quoted-script)))

3770

# get-script-name:

3771

# (lambda ()

3772

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

3773

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

3774

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

3775

# (buffer-file-name))))

3776

# remove-test-window:

3777

# (lambda ()

3778

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

3779

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

3780

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

3781

# (lambda ()

3782

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

3783

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

3784

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

3785

# (display-buffer-overriding-action

3786

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

3787

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

3788

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

3789

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

3790

# eval:

3791

# (progn

3792

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

3793

# (funcall run-tests t)))

3794

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

3795

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

3796

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

3797

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

3798

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

3799

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

3800

# End:

3441

3442

if __name__ == '__main__':

3443

main()