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- Committer: Teddy Hogeborn
- Date: 2011-08-08 21:12:37 UTC
- Revision ID: teddy@fukt.bsnet.se-20110808211237-jejsz5brjytrjot8
* Makefile (DOCS): Added "intro.8mandos".
(intro.8mandos, intro.8mandos.xhtml): New.
* README: Replaced text with link, reference and short summary.
* intro.xml: New.
* mandos-clients.conf.xml (SEE ALSO): Added "intro(8mandos)".
* mandos-ctl.xml (SEE ALSO): - '' -
* mandos-keygen.xml (SEE ALSO): - '' -
* mandos-monitor.xml (SEE ALSO): - '' -
* mandos.conf.xml (SEE ALSO): - '' -
* mandos.xml (SEE ALSO): - '' -
* plugin-runner.xml (SEE ALSO): - '' -
* plugins.d/askpass-fifo.xml (SEE ALSO): - '' -
* plugins.d/mandos-client.xml (SEE ALSO): - '' -
* plugins.d/password-prompt.xml (SEE ALSO): - '' -
* plugins.d/plymouth.xml (SEE ALSO): - '' -
* plugins.d/splashy.xml (SEE ALSO): - '' -
* plugins.d/usplash.xml (SEE ALSO): - '' -
(intro.8mandos, intro.8mandos.xhtml): New.
* README: Replaced text with link, reference and short summary.
* intro.xml: New.
* mandos-clients.conf.xml (SEE ALSO): Added "intro(8mandos)".
* mandos-ctl.xml (SEE ALSO): - '' -
* mandos-keygen.xml (SEE ALSO): - '' -
* mandos-monitor.xml (SEE ALSO): - '' -
* mandos.conf.xml (SEE ALSO): - '' -
* mandos.xml (SEE ALSO): - '' -
* plugin-runner.xml (SEE ALSO): - '' -
* plugins.d/askpass-fifo.xml (SEE ALSO): - '' -
* plugins.d/mandos-client.xml (SEE ALSO): - '' -
* plugins.d/password-prompt.xml (SEE ALSO): - '' -
* plugins.d/plymouth.xml (SEE ALSO): - '' -
* plugins.d/splashy.xml (SEE ALSO): - '' -
* plugins.d/usplash.xml (SEE ALSO): - '' -
- files removed:
- debian/mandos-client.examples
- debian/upstream
- network-hooks.d
- files modified:
- .bzrignore
added
removed
mandos
1
#!/usr/bin/python2.7
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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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# "AvahiService" class, and some lines in "main".
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#
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# Everything else is
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# Copyright © 2008-2014 Teddy Hogeborn
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# Copyright © 2008-2014 Björn Påhlsson
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# Copyright © 2008-2011 Teddy Hogeborn
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# Copyright © 2008-2011 Björn Påhlsson
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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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# 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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# Contact the authors at <mandos@fukt.bsnet.se>.
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#
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from __future__ import (division, absolute_import, print_function,
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unicode_literals)
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from future_builtins import *
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import SocketServer as socketserver
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import socket
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import argparse
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import functools
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import cPickle as pickle
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import multiprocessing
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import types
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import binascii
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import tempfile
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import itertools
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import collections
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65
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import dbus
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import dbus.service
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except ImportError:
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SO_BINDTODEVICE = None
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83
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version = "1.6.8"
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stored_state_file = "clients.pickle"
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logger = logging.getLogger()
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syslogger = None
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try:
98
if_nametoindex = (ctypes.cdll.LoadLibrary
99
(ctypes.util.find_library("c"))
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.if_nametoindex)
101
except (OSError, AttributeError):
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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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with contextlib.closing(socket.socket()) as s:
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ifreq = fcntl.ioctl(s, SIOCGIFINDEX,
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struct.pack(b"16s16x", interface))
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interface_index = struct.unpack("I", ifreq[16:20])[0]
109
return interface_index
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111
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def initlogger(debug, level=logging.WARNING):
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"""init logger and add loglevel"""
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global syslogger
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syslogger = (logging.handlers.SysLogHandler
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(facility =
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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:'
122
' %(message)s'))
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logger.addHandler(syslogger)
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125
if debug:
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console = logging.StreamHandler()
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console.setFormatter(logging.Formatter('%(asctime)s %(name)s'
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' [%(process)d]:'
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' %(levelname)s:'
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' %(message)s'))
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logger.addHandler(console)
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logger.setLevel(level)
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class PGPError(Exception):
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"""Exception if encryption/decryption fails"""
137
pass
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class PGPEngine(object):
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"""A simple class for OpenPGP symmetric encryption & decryption"""
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def __init__(self):
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self.tempdir = tempfile.mkdtemp(prefix="mandos-")
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self.gnupgargs = ['--batch',
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'--home', self.tempdir,
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'--force-mdc',
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'--quiet',
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'--no-use-agent']
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def __enter__(self):
151
return self
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def __exit__(self, exc_type, exc_value, traceback):
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self._cleanup()
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return False
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def __del__(self):
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self._cleanup()
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def _cleanup(self):
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if self.tempdir is not None:
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# Delete contents of tempdir
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for root, dirs, files in os.walk(self.tempdir,
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topdown = False):
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for filename in files:
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os.remove(os.path.join(root, filename))
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for dirname in dirs:
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os.rmdir(os.path.join(root, dirname))
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# Remove tempdir
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os.rmdir(self.tempdir)
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self.tempdir = None
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def password_encode(self, password):
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# Passphrase can not be empty and can not contain newlines or
175
# NUL bytes. So we prefix it and hex encode it.
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encoded = b"mandos" + binascii.hexlify(password)
177
if len(encoded) > 2048:
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# GnuPG can't handle long passwords, so encode differently
179
encoded = (b"mandos" + password.replace(b"\\", b"\\\\")
180
.replace(b"\n", b"\\n")
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.replace(b"\0", b"\\x00"))
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return encoded
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184
def encrypt(self, data, password):
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passphrase = self.password_encode(password)
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with tempfile.NamedTemporaryFile(dir=self.tempdir
187
) as passfile:
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passfile.write(passphrase)
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passfile.flush()
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proc = subprocess.Popen(['gpg', '--symmetric',
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'--passphrase-file',
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passfile.name]
193
+ self.gnupgargs,
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stdin = subprocess.PIPE,
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stdout = subprocess.PIPE,
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stderr = subprocess.PIPE)
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ciphertext, err = proc.communicate(input = data)
198
if proc.returncode != 0:
199
raise PGPError(err)
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return ciphertext
201
202
def decrypt(self, data, password):
203
passphrase = self.password_encode(password)
204
with tempfile.NamedTemporaryFile(dir = self.tempdir
205
) as passfile:
206
passfile.write(passphrase)
207
passfile.flush()
208
proc = subprocess.Popen(['gpg', '--decrypt',
209
'--passphrase-file',
210
passfile.name]
211
+ self.gnupgargs,
212
stdin = subprocess.PIPE,
213
stdout = subprocess.PIPE,
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stderr = subprocess.PIPE)
215
decrypted_plaintext, err = proc.communicate(input
216
= data)
217
if proc.returncode != 0:
218
raise PGPError(err)
219
return decrypted_plaintext
220
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version = "1.3.1"
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#logger = logging.getLogger('mandos')
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logger = logging.Logger('mandos')
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syslogger = (logging.handlers.SysLogHandler
90
(facility = logging.handlers.SysLogHandler.LOG_DAEMON,
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address = str("/dev/log")))
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syslogger.setFormatter(logging.Formatter
93
('Mandos [%(process)d]: %(levelname)s:'
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' %(message)s'))
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logger.addHandler(syslogger)
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console = logging.StreamHandler()
98
console.setFormatter(logging.Formatter('%(name)s [%(process)d]:'
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' %(levelname)s:'
100
' %(message)s'))
101
logger.addHandler(console)
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class AvahiError(Exception):
223
104
def __init__(self, value, *args, **kwargs):
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self.value = value
225
return super(AvahiError, self).__init__(value, *args,
226
**kwargs)
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super(AvahiError, self).__init__(value, *args, **kwargs)
107
def __unicode__(self):
108
return unicode(repr(self.value))
227
109
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class AvahiServiceError(AvahiError):
229
111
pass
240
122
Used to optionally bind to the specified interface.
241
123
name: string; Example: 'Mandos'
242
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type: string; Example: '_mandos._tcp'.
243
See <https://www.iana.org/assignments/service-names-port-numbers>
125
See <http://www.dns-sd.org/ServiceTypes.html>
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port: integer; what port to announce
245
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TXT: list of strings; TXT record for the service
246
128
domain: string; Domain to publish on, default to .local if empty.
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server: D-Bus Server
253
135
bus: dbus.SystemBus()
254
136
"""
255
256
137
def __init__(self, interface = avahi.IF_UNSPEC, name = None,
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servicetype = None, port = None, TXT = None,
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domain = "", host = "", max_renames = 32768,
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self.server = None
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self.bus = bus
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154
self.entry_group_state_changed_match = None
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def rename(self):
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"""Derived from the Avahi example code"""
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if self.rename_count >= self.max_renames:
279
159
" after %i retries, exiting.",
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160
self.rename_count)
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raise AvahiServiceError("Too many renames")
282
self.name = unicode(self.server
283
.GetAlternativeServiceName(self.name))
162
self.name = unicode(self.server.GetAlternativeServiceName(self.name))
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163
logger.info("Changing Zeroconf service name to %r ...",
285
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self.name)
165
syslogger.setFormatter(logging.Formatter
166
('Mandos (%s) [%%(process)d]:'
167
' %%(levelname)s: %%(message)s'
168
% self.name))
286
169
self.remove()
287
170
try:
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self.add()
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172
except dbus.exceptions.DBusException as error:
290
logger.critical("D-Bus Exception", exc_info=error)
173
logger.critical("DBusException: %s", error)
291
174
self.cleanup()
292
175
os._exit(1)
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176
self.rename_count += 1
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177
def remove(self):
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"""Derived from the Avahi example code"""
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179
if self.entry_group_state_changed_match is not None:
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self.entry_group_state_changed_match = None
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if self.group is not None:
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self.group.Reset()
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def add(self):
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185
"""Derived from the Avahi example code"""
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186
self.remove()
310
191
avahi.DBUS_INTERFACE_ENTRY_GROUP)
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192
self.entry_group_state_changed_match = (
312
193
self.group.connect_to_signal(
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'StateChanged', self.entry_group_state_changed))
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'StateChanged', self .entry_group_state_changed))
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logger.debug("Adding Zeroconf service '%s' of type '%s' ...",
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self.name, self.type)
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197
self.group.AddService(
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dbus.UInt16(self.port),
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avahi.string_array_to_txt_array(self.TXT))
324
205
self.group.Commit()
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326
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def entry_group_state_changed(self, state, error):
327
207
"""Derived from the Avahi example code"""
328
208
logger.debug("Avahi entry group state change: %i", state)
335
215
elif state == avahi.ENTRY_GROUP_FAILURE:
336
216
logger.critical("Avahi: Error in group state changed %s",
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217
unicode(error))
338
raise AvahiGroupError("State changed: {!s}"
339
.format(error))
340
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raise AvahiGroupError("State changed: %s"
219
% unicode(error))
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def cleanup(self):
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"""Derived from the Avahi example code"""
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if self.group is not None:
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223
try:
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224
self.group.Free()
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except (dbus.exceptions.UnknownMethodException,
347
dbus.exceptions.DBusException):
226
dbus.exceptions.DBusException) as e:
348
227
pass
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self.group = None
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self.remove()
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352
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def server_state_changed(self, state, error=None):
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"""Derived from the Avahi example code"""
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logger.debug("Avahi server state change: %i", state)
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logger.debug("Unknown state: %r", state)
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else:
375
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logger.debug("Unknown state: %r: %r", state, error)
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def activate(self):
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255
"""Derived from the Avahi example code"""
379
256
if self.server is None:
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self.server_state_changed(self.server.GetState())
388
265
389
266
390
class AvahiServiceToSyslog(AvahiService):
391
def rename(self):
392
"""Add the new name to the syslog messages"""
393
ret = AvahiService.rename(self)
394
syslogger.setFormatter(logging.Formatter
395
('Mandos ({}) [%(process)d]:'
396
' %(levelname)s: %(message)s'
397
.format(self.name)))
398
return ret
399
400
401
267
class Client(object):
402
268
"""A representation of a client host served by this server.
403
269
404
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Attributes:
405
approved: bool(); 'None' if not yet approved/disapproved
271
_approved: bool(); 'None' if not yet approved/disapproved
406
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approval_delay: datetime.timedelta(); Time to wait for approval
407
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approval_duration: datetime.timedelta(); Duration of one approval
408
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checker: subprocess.Popen(); a running checker process used
415
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instance %(name)s can be used in the command.
416
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checker_initiator_tag: a gobject event source tag, or None
417
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created: datetime.datetime(); (UTC) object creation
418
client_structure: Object describing what attributes a client has
419
and is used for storing the client at exit
420
284
current_checker_command: string; current running checker_command
285
disable_hook: If set, called by disable() as disable_hook(self)
421
286
disable_initiator_tag: a gobject event source tag, or None
422
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enabled: bool()
423
288
fingerprint: string (40 or 32 hexadecimal digits); used to
426
291
interval: datetime.timedelta(); How often to start a new checker
427
292
last_approval_request: datetime.datetime(); (UTC) or None
428
293
last_checked_ok: datetime.datetime(); (UTC) or None
429
last_checker_status: integer between 0 and 255 reflecting exit
430
status of last checker. -1 reflects crashed
431
checker, -2 means no checker completed yet.
432
last_enabled: datetime.datetime(); (UTC) or None
294
last_enabled: datetime.datetime(); (UTC)
433
295
name: string; from the config file, used in log messages and
434
296
D-Bus identifiers
435
297
secret: bytestring; sent verbatim (over TLS) to client
436
298
timeout: datetime.timedelta(); How long from last_checked_ok
437
299
until this client is disabled
438
extended_timeout: extra long timeout when secret has been sent
439
300
runtime_expansions: Allowed attributes for runtime expansion.
440
expires: datetime.datetime(); time (UTC) when a client will be
441
disabled, or None
442
server_settings: The server_settings dict from main()
443
301
"""
444
302
445
303
runtime_expansions = ("approval_delay", "approval_duration",
446
"created", "enabled", "expires",
447
"fingerprint", "host", "interval",
448
"last_approval_request", "last_checked_ok",
304
"created", "enabled", "fingerprint",
305
"host", "interval", "last_checked_ok",
449
306
"last_enabled", "name", "timeout")
450
client_defaults = { "timeout": "PT5M",
451
"extended_timeout": "PT15M",
452
"interval": "PT2M",
453
"checker": "fping -q -- %%(host)s",
454
"host": "",
455
"approval_delay": "PT0S",
456
"approval_duration": "PT1S",
457
"approved_by_default": "True",
458
"enabled": "True",
459
}
460
307
461
308
@staticmethod
462
def config_parser(config):
463
"""Construct a new dict of client settings of this form:
464
{ client_name: {setting_name: value, ...}, ...}
465
with exceptions for any special settings as defined above.
466
NOTE: Must be a pure function. Must return the same result
467
value given the same arguments.
468
"""
469
settings = {}
470
for client_name in config.sections():
471
section = dict(config.items(client_name))
472
client = settings[client_name] = {}
473
474
client["host"] = section["host"]
475
# Reformat values from string types to Python types
476
client["approved_by_default"] = config.getboolean(
477
client_name, "approved_by_default")
478
client["enabled"] = config.getboolean(client_name,
479
"enabled")
480
481
client["fingerprint"] = (section["fingerprint"].upper()
482
.replace(" ", ""))
483
if "secret" in section:
484
client["secret"] = section["secret"].decode("base64")
485
elif "secfile" in section:
486
with open(os.path.expanduser(os.path.expandvars
487
(section["secfile"])),
488
"rb") as secfile:
489
client["secret"] = secfile.read()
490
else:
491
raise TypeError("No secret or secfile for section {}"
492
.format(section))
493
client["timeout"] = string_to_delta(section["timeout"])
494
client["extended_timeout"] = string_to_delta(
495
section["extended_timeout"])
496
client["interval"] = string_to_delta(section["interval"])
497
client["approval_delay"] = string_to_delta(
498
section["approval_delay"])
499
client["approval_duration"] = string_to_delta(
500
section["approval_duration"])
501
client["checker_command"] = section["checker"]
502
client["last_approval_request"] = None
503
client["last_checked_ok"] = None
504
client["last_checker_status"] = -2
505
506
return settings
507
508
def __init__(self, settings, name = None, server_settings=None):
309
def _timedelta_to_milliseconds(td):
310
"Convert a datetime.timedelta() to milliseconds"
311
return ((td.days * 24 * 60 * 60 * 1000)
312
+ (td.seconds * 1000)
313
+ (td.microseconds // 1000))
314
315
def timeout_milliseconds(self):
316
"Return the 'timeout' attribute in milliseconds"
317
return self._timedelta_to_milliseconds(self.timeout)
318
319
def interval_milliseconds(self):
320
"Return the 'interval' attribute in milliseconds"
321
return self._timedelta_to_milliseconds(self.interval)
322
323
def approval_delay_milliseconds(self):
324
return self._timedelta_to_milliseconds(self.approval_delay)
325
326
def __init__(self, name = None, disable_hook=None, config=None):
327
"""Note: the 'checker' key in 'config' sets the
328
'checker_command' attribute and *not* the 'checker'
329
attribute."""
509
330
self.name = name
510
if server_settings is None:
511
server_settings = {}
512
self.server_settings = server_settings
513
# adding all client settings
514
for setting, value in settings.items():
515
setattr(self, setting, value)
516
517
if self.enabled:
518
if not hasattr(self, "last_enabled"):
519
self.last_enabled = datetime.datetime.utcnow()
520
if not hasattr(self, "expires"):
521
self.expires = (datetime.datetime.utcnow()
522
+ self.timeout)
523
else:
524
self.last_enabled = None
525
self.expires = None
526
331
if config is None:
332
config = {}
527
333
logger.debug("Creating client %r", self.name)
528
334
# Uppercase and remove spaces from fingerprint for later
529
335
# comparison purposes with return value from the fingerprint()
530
336
# function
337
self.fingerprint = (config["fingerprint"].upper()
338
.replace(" ", ""))
531
339
logger.debug(" Fingerprint: %s", self.fingerprint)
532
self.created = settings.get("created",
533
datetime.datetime.utcnow())
534
535
# attributes specific for this server instance
340
if "secret" in config:
341
self.secret = config["secret"].decode("base64")
342
elif "secfile" in config:
343
with open(os.path.expanduser(os.path.expandvars
344
(config["secfile"])),
345
"rb") as secfile:
346
self.secret = secfile.read()
347
else:
348
raise TypeError("No secret or secfile for client %s"
349
% self.name)
350
self.host = config.get("host", "")
351
self.created = datetime.datetime.utcnow()
352
self.enabled = False
353
self.last_approval_request = None
354
self.last_enabled = None
355
self.last_checked_ok = None
356
self.timeout = string_to_delta(config["timeout"])
357
self.interval = string_to_delta(config["interval"])
358
self.disable_hook = disable_hook
536
359
self.checker = None
537
360
self.checker_initiator_tag = None
538
361
self.disable_initiator_tag = None
539
362
self.checker_callback_tag = None
363
self.checker_command = config["checker"]
540
364
self.current_checker_command = None
541
self.approved = None
365
self.last_connect = None
366
self._approved = None
367
self.approved_by_default = config.get("approved_by_default",
368
True)
542
369
self.approvals_pending = 0
543
self.changedstate = (multiprocessing_manager
544
.Condition(multiprocessing_manager
545
.Lock()))
546
self.client_structure = [attr for attr in
547
self.__dict__.iterkeys()
548
if not attr.startswith("_")]
549
self.client_structure.append("client_structure")
550
551
for name, t in inspect.getmembers(type(self),
552
lambda obj:
553
isinstance(obj,
554
property)):
555
if not name.startswith("_"):
556
self.client_structure.append(name)
370
self.approval_delay = string_to_delta(
371
config["approval_delay"])
372
self.approval_duration = string_to_delta(
373
config["approval_duration"])
374
self.changedstate = multiprocessing_manager.Condition(multiprocessing_manager.Lock())
557
375
558
# Send notice to process children that client state has changed
559
376
def send_changedstate(self):
560
with self.changedstate:
561
self.changedstate.notify_all()
562
377
self.changedstate.acquire()
378
self.changedstate.notify_all()
379
self.changedstate.release()
380
563
381
def enable(self):
564
382
"""Start this client's checker and timeout hooks"""
565
383
if getattr(self, "enabled", False):
566
384
# Already enabled
567
385
return
568
self.expires = datetime.datetime.utcnow() + self.timeout
569
self.enabled = True
386
self.send_changedstate()
570
387
self.last_enabled = datetime.datetime.utcnow()
571
self.init_checker()
572
self.send_changedstate()
388
# Schedule a new checker to be started an 'interval' from now,
389
# and every interval from then on.
390
self.checker_initiator_tag = (gobject.timeout_add
391
(self.interval_milliseconds(),
392
self.start_checker))
393
# Schedule a disable() when 'timeout' has passed
394
self.disable_initiator_tag = (gobject.timeout_add
395
(self.timeout_milliseconds(),
396
self.disable))
397
self.enabled = True
398
# Also start a new checker *right now*.
399
self.start_checker()
573
400
574
401
def disable(self, quiet=True):
575
402
"""Disable this client."""
576
403
if not getattr(self, "enabled", False):
577
404
return False
578
405
if not quiet:
406
self.send_changedstate()
407
if not quiet:
579
408
logger.info("Disabling client %s", self.name)
580
if getattr(self, "disable_initiator_tag", None) is not None:
409
if getattr(self, "disable_initiator_tag", False):
581
410
gobject.source_remove(self.disable_initiator_tag)
582
411
self.disable_initiator_tag = None
583
self.expires = None
584
if getattr(self, "checker_initiator_tag", None) is not None:
412
if getattr(self, "checker_initiator_tag", False):
585
413
gobject.source_remove(self.checker_initiator_tag)
586
414
self.checker_initiator_tag = None
587
415
self.stop_checker()
416
if self.disable_hook:
417
self.disable_hook(self)
588
418
self.enabled = False
589
if not quiet:
590
self.send_changedstate()
591
419
# Do not run this again if called by a gobject.timeout_add
592
420
return False
593
421
594
422
def __del__(self):
423
self.disable_hook = None
595
424
self.disable()
596
425
597
def init_checker(self):
598
# Schedule a new checker to be started an 'interval' from now,
599
# and every interval from then on.
600
if self.checker_initiator_tag is not None:
601
gobject.source_remove(self.checker_initiator_tag)
602
self.checker_initiator_tag = (gobject.timeout_add
603
(int(self.interval
604
.total_seconds() * 1000),
605
self.start_checker))
606
# Schedule a disable() when 'timeout' has passed
607
if self.disable_initiator_tag is not None:
608
gobject.source_remove(self.disable_initiator_tag)
609
self.disable_initiator_tag = (gobject.timeout_add
610
(int(self.timeout
611
.total_seconds() * 1000),
612
self.disable))
613
# Also start a new checker *right now*.
614
self.start_checker()
615
616
426
def checker_callback(self, pid, condition, command):
617
427
"""The checker has completed, so take appropriate actions."""
618
428
self.checker_callback_tag = None
619
429
self.checker = None
620
430
if os.WIFEXITED(condition):
621
self.last_checker_status = os.WEXITSTATUS(condition)
622
if self.last_checker_status == 0:
431
exitstatus = os.WEXITSTATUS(condition)
432
if exitstatus == 0:
623
433
logger.info("Checker for %(name)s succeeded",
624
434
vars(self))
625
435
self.checked_ok()
627
437
logger.info("Checker for %(name)s failed",
628
438
vars(self))
629
439
else:
630
self.last_checker_status = -1
631
440
logger.warning("Checker for %(name)s crashed?",
632
441
vars(self))
633
442
634
443
def checked_ok(self):
635
"""Assert that the client has been seen, alive and well."""
444
"""Bump up the timeout for this client.
445
446
This should only be called when the client has been seen,
447
alive and well.
448
"""
636
449
self.last_checked_ok = datetime.datetime.utcnow()
637
self.last_checker_status = 0
638
self.bump_timeout()
639
640
def bump_timeout(self, timeout=None):
641
"""Bump up the timeout for this client."""
642
if timeout is None:
643
timeout = self.timeout
644
if self.disable_initiator_tag is not None:
645
gobject.source_remove(self.disable_initiator_tag)
646
self.disable_initiator_tag = None
647
if getattr(self, "enabled", False):
648
self.disable_initiator_tag = (gobject.timeout_add
649
(int(timeout.total_seconds()
650
* 1000), self.disable))
651
self.expires = datetime.datetime.utcnow() + timeout
450
gobject.source_remove(self.disable_initiator_tag)
451
self.disable_initiator_tag = (gobject.timeout_add
452
(self.timeout_milliseconds(),
453
self.disable))
652
454
653
455
def need_approval(self):
654
456
self.last_approval_request = datetime.datetime.utcnow()
659
461
If a checker already exists, leave it running and do
660
462
nothing."""
661
463
# The reason for not killing a running checker is that if we
662
# did that, and if a checker (for some reason) started running
663
# slowly and taking more than 'interval' time, then the client
664
# would inevitably timeout, since no checker would get a
665
# chance to run to completion. If we instead leave running
464
# did that, then if a checker (for some reason) started
465
# running slowly and taking more than 'interval' time, the
466
# client would inevitably timeout, since no checker would get
467
# a chance to run to completion. If we instead leave running
666
468
# checkers alone, the checker would have to take more time
667
469
# than 'timeout' for the client to be disabled, which is as it
668
470
# should be.
670
472
# If a checker exists, make sure it is not a zombie
671
473
try:
672
474
pid, status = os.waitpid(self.checker.pid, os.WNOHANG)
673
except AttributeError:
674
pass
675
except OSError as error:
676
if error.errno != errno.ECHILD:
677
raise
475
except (AttributeError, OSError) as error:
476
if (isinstance(error, OSError)
477
and error.errno != errno.ECHILD):
478
raise error
678
479
else:
679
480
if pid:
680
481
logger.warning("Checker was a zombie")
683
484
self.current_checker_command)
684
485
# Start a new checker if needed
685
486
if self.checker is None:
686
# Escape attributes for the shell
687
escaped_attrs = { attr:
688
re.escape(unicode(getattr(self,
689
attr)))
690
for attr in self.runtime_expansions }
691
487
try:
692
command = self.checker_command % escaped_attrs
693
except TypeError as error:
694
logger.error('Could not format string "%s"',
695
self.checker_command, exc_info=error)
696
return True # Try again later
488
# In case checker_command has exactly one % operator
489
command = self.checker_command % self.host
490
except TypeError:
491
# Escape attributes for the shell
492
escaped_attrs = dict(
493
(attr,
494
re.escape(unicode(str(getattr(self, attr, "")),
495
errors=
496
'replace')))
497
for attr in
498
self.runtime_expansions)
499
500
try:
501
command = self.checker_command % escaped_attrs
502
except TypeError as error:
503
logger.error('Could not format string "%s":'
504
' %s', self.checker_command, error)
505
return True # Try again later
697
506
self.current_checker_command = command
698
507
try:
699
508
logger.info("Starting checker %r for %s",
702
511
# in normal mode, that is already done by daemon(),
703
512
# and in debug mode we don't want to. (Stdin is
704
513
# always replaced by /dev/null.)
705
# The exception is when not debugging but nevertheless
706
# running in the foreground; use the previously
707
# created wnull.
708
popen_args = {}
709
if (not self.server_settings["debug"]
710
and self.server_settings["foreground"]):
711
popen_args.update({"stdout": wnull,
712
"stderr": wnull })
713
514
self.checker = subprocess.Popen(command,
714
515
close_fds=True,
715
shell=True, cwd="/",
716
**popen_args)
717
except OSError as error:
718
logger.error("Failed to start subprocess",
719
exc_info=error)
720
return True
721
self.checker_callback_tag = (gobject.child_watch_add
722
(self.checker.pid,
723
self.checker_callback,
724
data=command))
725
# The checker may have completed before the gobject
726
# watch was added. Check for this.
727
try:
516
shell=True, cwd="/")
517
self.checker_callback_tag = (gobject.child_watch_add
518
(self.checker.pid,
519
self.checker_callback,
520
data=command))
521
# The checker may have completed before the gobject
522
# watch was added. Check for this.
728
523
pid, status = os.waitpid(self.checker.pid, os.WNOHANG)
524
if pid:
525
gobject.source_remove(self.checker_callback_tag)
526
self.checker_callback(pid, status, command)
729
527
except OSError as error:
730
if error.errno == errno.ECHILD:
731
# This should never happen
732
logger.error("Child process vanished",
733
exc_info=error)
734
return True
735
raise
736
if pid:
737
gobject.source_remove(self.checker_callback_tag)
738
self.checker_callback(pid, status, command)
528
logger.error("Failed to start subprocess: %s",
529
error)
739
530
# Re-run this periodically if run by gobject.timeout_add
740
531
return True
741
532
748
539
return
749
540
logger.debug("Stopping checker for %(name)s", vars(self))
750
541
try:
751
self.checker.terminate()
542
os.kill(self.checker.pid, signal.SIGTERM)
752
543
#time.sleep(0.5)
753
544
#if self.checker.poll() is None:
754
# self.checker.kill()
545
# os.kill(self.checker.pid, signal.SIGKILL)
755
546
except OSError as error:
756
547
if error.errno != errno.ESRCH: # No such process
757
548
raise
758
549
self.checker = None
759
550
760
761
551
def dbus_service_property(dbus_interface, signature="v",
762
552
access="readwrite", byte_arrays=False):
763
553
"""Decorators for marking methods of a DBusObjectWithProperties to
774
564
# "Set" method, so we fail early here:
775
565
if byte_arrays and signature != "ay":
776
566
raise ValueError("Byte arrays not supported for non-'ay'"
777
" signature {!r}".format(signature))
567
" signature %r" % signature)
778
568
def decorator(func):
779
569
func._dbus_is_property = True
780
570
func._dbus_interface = dbus_interface
788
578
return decorator
789
579
790
580
791
def dbus_interface_annotations(dbus_interface):
792
"""Decorator for marking functions returning interface annotations
793
794
Usage:
795
796
@dbus_interface_annotations("org.example.Interface")
797
def _foo(self): # Function name does not matter
798
return {"org.freedesktop.DBus.Deprecated": "true",
799
"org.freedesktop.DBus.Property.EmitsChangedSignal":
800
"false"}
801
"""
802
def decorator(func):
803
func._dbus_is_interface = True
804
func._dbus_interface = dbus_interface
805
func._dbus_name = dbus_interface
806
return func
807
return decorator
808
809
810
def dbus_annotations(annotations):
811
"""Decorator to annotate D-Bus methods, signals or properties
812
Usage:
813
814
@dbus_service_property("org.example.Interface", signature="b",
815
access="r")
816
@dbus_annotations({{"org.freedesktop.DBus.Deprecated": "true",
817
"org.freedesktop.DBus.Property."
818
"EmitsChangedSignal": "false"})
819
def Property_dbus_property(self):
820
return dbus.Boolean(False)
821
"""
822
def decorator(func):
823
func._dbus_annotations = annotations
824
return func
825
return decorator
826
827
828
581
class DBusPropertyException(dbus.exceptions.DBusException):
829
582
"""A base class for D-Bus property-related exceptions
830
583
"""
831
pass
584
def __unicode__(self):
585
return unicode(str(self))
586
832
587
833
588
class DBusPropertyAccessException(DBusPropertyException):
834
589
"""A property's access permissions disallows an operation.
844
599
845
600
class DBusObjectWithProperties(dbus.service.Object):
846
601
"""A D-Bus object with properties.
847
602
848
603
Classes inheriting from this can use the dbus_service_property
849
604
decorator to expose methods as D-Bus properties. It exposes the
850
605
standard Get(), Set(), and GetAll() methods on the D-Bus.
851
606
"""
852
607
853
608
@staticmethod
854
def _is_dbus_thing(thing):
855
"""Returns a function testing if an attribute is a D-Bus thing
856
857
If called like _is_dbus_thing("method") it returns a function
858
suitable for use as predicate to inspect.getmembers().
859
"""
860
return lambda obj: getattr(obj, "_dbus_is_{}".format(thing),
861
False)
609
def _is_dbus_property(obj):
610
return getattr(obj, "_dbus_is_property", False)
862
611
863
def _get_all_dbus_things(self, thing):
612
def _get_all_dbus_properties(self):
864
613
"""Returns a generator of (name, attribute) pairs
865
614
"""
866
return ((getattr(athing.__get__(self), "_dbus_name",
867
name),
868
athing.__get__(self))
869
for cls in self.__class__.__mro__
870
for name, athing in
871
inspect.getmembers(cls,
872
self._is_dbus_thing(thing)))
615
return ((prop._dbus_name, prop)
616
for name, prop in
617
inspect.getmembers(self, self._is_dbus_property))
873
618
874
619
def _get_dbus_property(self, interface_name, property_name):
875
620
"""Returns a bound method if one exists which is a D-Bus
876
621
property with the specified name and interface.
877
622
"""
878
for cls in self.__class__.__mro__:
879
for name, value in (inspect.getmembers
880
(cls,
881
self._is_dbus_thing("property"))):
882
if (value._dbus_name == property_name
883
and value._dbus_interface == interface_name):
884
return value.__get__(self)
885
623
for name in (property_name,
624
property_name + "_dbus_property"):
625
prop = getattr(self, name, None)
626
if (prop is None
627
or not self._is_dbus_property(prop)
628
or prop._dbus_name != property_name
629
or (interface_name and prop._dbus_interface
630
and interface_name != prop._dbus_interface)):
631
continue
632
return prop
886
633
# No such property
887
634
raise DBusPropertyNotFound(self.dbus_object_path + ":"
888
635
+ interface_name + "."
912
659
# The byte_arrays option is not supported yet on
913
660
# signatures other than "ay".
914
661
if prop._dbus_signature != "ay":
915
raise ValueError("Byte arrays not supported for non-"
916
"'ay' signature {!r}"
917
.format(prop._dbus_signature))
918
value = dbus.ByteArray(b''.join(chr(byte)
919
for byte in value))
662
raise ValueError
663
value = dbus.ByteArray(''.join(unichr(byte)
664
for byte in value))
920
665
prop(value)
921
666
922
667
@dbus.service.method(dbus.PROPERTIES_IFACE, in_signature="s",
924
669
def GetAll(self, interface_name):
925
670
"""Standard D-Bus property GetAll() method, see D-Bus
926
671
standard.
927
672
928
673
Note: Will not include properties with access="write".
929
674
"""
930
properties = {}
931
for name, prop in self._get_all_dbus_things("property"):
675
all = {}
676
for name, prop in self._get_all_dbus_properties():
932
677
if (interface_name
933
678
and interface_name != prop._dbus_interface):
934
679
# Interface non-empty but did not match
938
683
continue
939
684
value = prop()
940
685
if not hasattr(value, "variant_level"):
941
properties[name] = value
686
all[name] = value
942
687
continue
943
properties[name] = type(value)(value, variant_level=
944
value.variant_level+1)
945
return dbus.Dictionary(properties, signature="sv")
688
all[name] = type(value)(value, variant_level=
689
value.variant_level+1)
690
return dbus.Dictionary(all, signature="sv")
946
691
947
692
@dbus.service.method(dbus.INTROSPECTABLE_IFACE,
948
693
out_signature="s",
949
694
path_keyword='object_path',
950
695
connection_keyword='connection')
951
696
def Introspect(self, object_path, connection):
952
"""Overloading of standard D-Bus method.
953
954
Inserts property tags and interface annotation tags.
697
"""Standard D-Bus method, overloaded to insert property tags.
955
698
"""
956
699
xmlstring = dbus.service.Object.Introspect(self, object_path,
957
700
connection)
964
707
e.setAttribute("access", prop._dbus_access)
965
708
return e
966
709
for if_tag in document.getElementsByTagName("interface"):
967
# Add property tags
968
710
for tag in (make_tag(document, name, prop)
969
711
for name, prop
970
in self._get_all_dbus_things("property")
712
in self._get_all_dbus_properties()
971
713
if prop._dbus_interface
972
714
== if_tag.getAttribute("name")):
973
715
if_tag.appendChild(tag)
974
# Add annotation tags
975
for typ in ("method", "signal", "property"):
976
for tag in if_tag.getElementsByTagName(typ):
977
annots = dict()
978
for name, prop in (self.
979
_get_all_dbus_things(typ)):
980
if (name == tag.getAttribute("name")
981
and prop._dbus_interface
982
== if_tag.getAttribute("name")):
983
annots.update(getattr
984
(prop,
985
"_dbus_annotations",
986
{}))
987
for name, value in annots.items():
988
ann_tag = document.createElement(
989
"annotation")
990
ann_tag.setAttribute("name", name)
991
ann_tag.setAttribute("value", value)
992
tag.appendChild(ann_tag)
993
# Add interface annotation tags
994
for annotation, value in dict(
995
itertools.chain.from_iterable(
996
annotations().items()
997
for name, annotations in
998
self._get_all_dbus_things("interface")
999
if name == if_tag.getAttribute("name")
1000
)).items():
1001
ann_tag = document.createElement("annotation")
1002
ann_tag.setAttribute("name", annotation)
1003
ann_tag.setAttribute("value", value)
1004
if_tag.appendChild(ann_tag)
1005
716
# Add the names to the return values for the
1006
717
# "org.freedesktop.DBus.Properties" methods
1007
718
if (if_tag.getAttribute("name")
1022
733
except (AttributeError, xml.dom.DOMException,
1023
734
xml.parsers.expat.ExpatError) as error:
1024
735
logger.error("Failed to override Introspection method",
1025
exc_info=error)
736
error)
1026
737
return xmlstring
1027
738
1028
739
1029
def datetime_to_dbus(dt, variant_level=0):
1030
"""Convert a UTC datetime.datetime() to a D-Bus type."""
1031
if dt is None:
1032
return dbus.String("", variant_level = variant_level)
1033
return dbus.String(dt.isoformat(),
1034
variant_level=variant_level)
1035
1036
1037
def alternate_dbus_interfaces(alt_interface_names, deprecate=True):
1038
"""A class decorator; applied to a subclass of
1039
dbus.service.Object, it will add alternate D-Bus attributes with
1040
interface names according to the "alt_interface_names" mapping.
1041
Usage:
1042
1043
@alternate_dbus_interfaces({"org.example.Interface":
1044
"net.example.AlternateInterface"})
1045
class SampleDBusObject(dbus.service.Object):
1046
@dbus.service.method("org.example.Interface")
1047
def SampleDBusMethod():
1048
pass
1049
1050
The above "SampleDBusMethod" on "SampleDBusObject" will be
1051
reachable via two interfaces: "org.example.Interface" and
1052
"net.example.AlternateInterface", the latter of which will have
1053
its D-Bus annotation "org.freedesktop.DBus.Deprecated" set to
1054
"true", unless "deprecate" is passed with a False value.
1055
1056
This works for methods and signals, and also for D-Bus properties
1057
(from DBusObjectWithProperties) and interfaces (from the
1058
dbus_interface_annotations decorator).
1059
"""
1060
def wrapper(cls):
1061
for orig_interface_name, alt_interface_name in (
1062
alt_interface_names.items()):
1063
attr = {}
1064
interface_names = set()
1065
# Go though all attributes of the class
1066
for attrname, attribute in inspect.getmembers(cls):
1067
# Ignore non-D-Bus attributes, and D-Bus attributes
1068
# with the wrong interface name
1069
if (not hasattr(attribute, "_dbus_interface")
1070
or not attribute._dbus_interface
1071
.startswith(orig_interface_name)):
1072
continue
1073
# Create an alternate D-Bus interface name based on
1074
# the current name
1075
alt_interface = (attribute._dbus_interface
1076
.replace(orig_interface_name,
1077
alt_interface_name))
1078
interface_names.add(alt_interface)
1079
# Is this a D-Bus signal?
1080
if getattr(attribute, "_dbus_is_signal", False):
1081
# Extract the original non-method undecorated
1082
# function by black magic
1083
nonmethod_func = (dict(
1084
zip(attribute.func_code.co_freevars,
1085
attribute.__closure__))["func"]
1086
.cell_contents)
1087
# Create a new, but exactly alike, function
1088
# object, and decorate it to be a new D-Bus signal
1089
# with the alternate D-Bus interface name
1090
new_function = (dbus.service.signal
1091
(alt_interface,
1092
attribute._dbus_signature)
1093
(types.FunctionType(
1094
nonmethod_func.func_code,
1095
nonmethod_func.func_globals,
1096
nonmethod_func.func_name,
1097
nonmethod_func.func_defaults,
1098
nonmethod_func.func_closure)))
1099
# Copy annotations, if any
1100
try:
1101
new_function._dbus_annotations = (
1102
dict(attribute._dbus_annotations))
1103
except AttributeError:
1104
pass
1105
# Define a creator of a function to call both the
1106
# original and alternate functions, so both the
1107
# original and alternate signals gets sent when
1108
# the function is called
1109
def fixscope(func1, func2):
1110
"""This function is a scope container to pass
1111
func1 and func2 to the "call_both" function
1112
outside of its arguments"""
1113
def call_both(*args, **kwargs):
1114
"""This function will emit two D-Bus
1115
signals by calling func1 and func2"""
1116
func1(*args, **kwargs)
1117
func2(*args, **kwargs)
1118
return call_both
1119
# Create the "call_both" function and add it to
1120
# the class
1121
attr[attrname] = fixscope(attribute, new_function)
1122
# Is this a D-Bus method?
1123
elif getattr(attribute, "_dbus_is_method", False):
1124
# Create a new, but exactly alike, function
1125
# object. Decorate it to be a new D-Bus method
1126
# with the alternate D-Bus interface name. Add it
1127
# to the class.
1128
attr[attrname] = (dbus.service.method
1129
(alt_interface,
1130
attribute._dbus_in_signature,
1131
attribute._dbus_out_signature)
1132
(types.FunctionType
1133
(attribute.func_code,
1134
attribute.func_globals,
1135
attribute.func_name,
1136
attribute.func_defaults,
1137
attribute.func_closure)))
1138
# Copy annotations, if any
1139
try:
1140
attr[attrname]._dbus_annotations = (
1141
dict(attribute._dbus_annotations))
1142
except AttributeError:
1143
pass
1144
# Is this a D-Bus property?
1145
elif getattr(attribute, "_dbus_is_property", False):
1146
# Create a new, but exactly alike, function
1147
# object, and decorate it to be a new D-Bus
1148
# property with the alternate D-Bus interface
1149
# name. Add it to the class.
1150
attr[attrname] = (dbus_service_property
1151
(alt_interface,
1152
attribute._dbus_signature,
1153
attribute._dbus_access,
1154
attribute
1155
._dbus_get_args_options
1156
["byte_arrays"])
1157
(types.FunctionType
1158
(attribute.func_code,
1159
attribute.func_globals,
1160
attribute.func_name,
1161
attribute.func_defaults,
1162
attribute.func_closure)))
1163
# Copy annotations, if any
1164
try:
1165
attr[attrname]._dbus_annotations = (
1166
dict(attribute._dbus_annotations))
1167
except AttributeError:
1168
pass
1169
# Is this a D-Bus interface?
1170
elif getattr(attribute, "_dbus_is_interface", False):
1171
# Create a new, but exactly alike, function
1172
# object. Decorate it to be a new D-Bus interface
1173
# with the alternate D-Bus interface name. Add it
1174
# to the class.
1175
attr[attrname] = (dbus_interface_annotations
1176
(alt_interface)
1177
(types.FunctionType
1178
(attribute.func_code,
1179
attribute.func_globals,
1180
attribute.func_name,
1181
attribute.func_defaults,
1182
attribute.func_closure)))
1183
if deprecate:
1184
# Deprecate all alternate interfaces
1185
iname="_AlternateDBusNames_interface_annotation{}"
1186
for interface_name in interface_names:
1187
@dbus_interface_annotations(interface_name)
1188
def func(self):
1189
return { "org.freedesktop.DBus.Deprecated":
1190
"true" }
1191
# Find an unused name
1192
for aname in (iname.format(i)
1193
for i in itertools.count()):
1194
if aname not in attr:
1195
attr[aname] = func
1196
break
1197
if interface_names:
1198
# Replace the class with a new subclass of it with
1199
# methods, signals, etc. as created above.
1200
cls = type(b"{}Alternate".format(cls.__name__),
1201
(cls,), attr)
1202
return cls
1203
return wrapper
1204
1205
1206
@alternate_dbus_interfaces({"se.recompile.Mandos":
1207
"se.bsnet.fukt.Mandos"})
1208
740
class ClientDBus(Client, DBusObjectWithProperties):
1209
741
"""A Client class using D-Bus
1210
742
1219
751
# dbus.service.Object doesn't use super(), so we can't either.
1220
752
1221
753
def __init__(self, bus = None, *args, **kwargs):
754
self._approvals_pending = 0
1222
755
self.bus = bus
1223
756
Client.__init__(self, *args, **kwargs)
1224
757
# Only now, when this client is initialized, can it show up on
1230
763
("/clients/" + client_object_name))
1231
764
DBusObjectWithProperties.__init__(self, self.bus,
1232
765
self.dbus_object_path)
1233
1234
def notifychangeproperty(transform_func,
1235
dbus_name, type_func=lambda x: x,
1236
variant_level=1):
1237
""" Modify a variable so that it's a property which announces
1238
its changes to DBus.
1239
1240
transform_fun: Function that takes a value and a variant_level
1241
and transforms it to a D-Bus type.
1242
dbus_name: D-Bus name of the variable
1243
type_func: Function that transform the value before sending it
1244
to the D-Bus. Default: no transform
1245
variant_level: D-Bus variant level. Default: 1
1246
"""
1247
attrname = "_{}".format(dbus_name)
1248
def setter(self, value):
1249
if hasattr(self, "dbus_object_path"):
1250
if (not hasattr(self, attrname) or
1251
type_func(getattr(self, attrname, None))
1252
!= type_func(value)):
1253
dbus_value = transform_func(type_func(value),
1254
variant_level
1255
=variant_level)
1256
self.PropertyChanged(dbus.String(dbus_name),
1257
dbus_value)
1258
setattr(self, attrname, value)
1259
1260
return property(lambda self: getattr(self, attrname), setter)
1261
1262
expires = notifychangeproperty(datetime_to_dbus, "Expires")
1263
approvals_pending = notifychangeproperty(dbus.Boolean,
1264
"ApprovalPending",
1265
type_func = bool)
1266
enabled = notifychangeproperty(dbus.Boolean, "Enabled")
1267
last_enabled = notifychangeproperty(datetime_to_dbus,
1268
"LastEnabled")
1269
checker = notifychangeproperty(dbus.Boolean, "CheckerRunning",
1270
type_func = lambda checker:
1271
checker is not None)
1272
last_checked_ok = notifychangeproperty(datetime_to_dbus,
1273
"LastCheckedOK")
1274
last_checker_status = notifychangeproperty(dbus.Int16,
1275
"LastCheckerStatus")
1276
last_approval_request = notifychangeproperty(
1277
datetime_to_dbus, "LastApprovalRequest")
1278
approved_by_default = notifychangeproperty(dbus.Boolean,
1279
"ApprovedByDefault")
1280
approval_delay = notifychangeproperty(dbus.UInt64,
1281
"ApprovalDelay",
1282
type_func =
1283
lambda td: td.total_seconds()
1284
* 1000)
1285
approval_duration = notifychangeproperty(
1286
dbus.UInt64, "ApprovalDuration",
1287
type_func = lambda td: td.total_seconds() * 1000)
1288
host = notifychangeproperty(dbus.String, "Host")
1289
timeout = notifychangeproperty(dbus.UInt64, "Timeout",
1290
type_func = lambda td:
1291
td.total_seconds() * 1000)
1292
extended_timeout = notifychangeproperty(
1293
dbus.UInt64, "ExtendedTimeout",
1294
type_func = lambda td: td.total_seconds() * 1000)
1295
interval = notifychangeproperty(dbus.UInt64,
1296
"Interval",
1297
type_func =
1298
lambda td: td.total_seconds()
1299
* 1000)
1300
checker_command = notifychangeproperty(dbus.String, "Checker")
1301
1302
del notifychangeproperty
766
767
def _get_approvals_pending(self):
768
return self._approvals_pending
769
def _set_approvals_pending(self, value):
770
old_value = self._approvals_pending
771
self._approvals_pending = value
772
bval = bool(value)
773
if (hasattr(self, "dbus_object_path")
774
and bval is not bool(old_value)):
775
dbus_bool = dbus.Boolean(bval, variant_level=1)
776
self.PropertyChanged(dbus.String("ApprovalPending"),
777
dbus_bool)
778
779
approvals_pending = property(_get_approvals_pending,
780
_set_approvals_pending)
781
del _get_approvals_pending, _set_approvals_pending
782
783
@staticmethod
784
def _datetime_to_dbus(dt, variant_level=0):
785
"""Convert a UTC datetime.datetime() to a D-Bus type."""
786
return dbus.String(dt.isoformat(),
787
variant_level=variant_level)
788
789
def enable(self):
790
oldstate = getattr(self, "enabled", False)
791
r = Client.enable(self)
792
if oldstate != self.enabled:
793
# Emit D-Bus signals
794
self.PropertyChanged(dbus.String("Enabled"),
795
dbus.Boolean(True, variant_level=1))
796
self.PropertyChanged(
797
dbus.String("LastEnabled"),
798
self._datetime_to_dbus(self.last_enabled,
799
variant_level=1))
800
return r
801
802
def disable(self, quiet = False):
803
oldstate = getattr(self, "enabled", False)
804
r = Client.disable(self, quiet=quiet)
805
if not quiet and oldstate != self.enabled:
806
# Emit D-Bus signal
807
self.PropertyChanged(dbus.String("Enabled"),
808
dbus.Boolean(False, variant_level=1))
809
return r
1303
810
1304
811
def __del__(self, *args, **kwargs):
1305
812
try:
1314
821
*args, **kwargs):
1315
822
self.checker_callback_tag = None
1316
823
self.checker = None
824
# Emit D-Bus signal
825
self.PropertyChanged(dbus.String("CheckerRunning"),
826
dbus.Boolean(False, variant_level=1))
1317
827
if os.WIFEXITED(condition):
1318
828
exitstatus = os.WEXITSTATUS(condition)
1319
829
# Emit D-Bus signal
1329
839
return Client.checker_callback(self, pid, condition, command,
1330
840
*args, **kwargs)
1331
841
842
def checked_ok(self, *args, **kwargs):
843
Client.checked_ok(self, *args, **kwargs)
844
# Emit D-Bus signal
845
self.PropertyChanged(
846
dbus.String("LastCheckedOK"),
847
(self._datetime_to_dbus(self.last_checked_ok,
848
variant_level=1)))
849
850
def need_approval(self, *args, **kwargs):
851
r = Client.need_approval(self, *args, **kwargs)
852
# Emit D-Bus signal
853
self.PropertyChanged(
854
dbus.String("LastApprovalRequest"),
855
(self._datetime_to_dbus(self.last_approval_request,
856
variant_level=1)))
857
return r
858
1332
859
def start_checker(self, *args, **kwargs):
1333
old_checker_pid = getattr(self.checker, "pid", None)
860
old_checker = self.checker
861
if self.checker is not None:
862
old_checker_pid = self.checker.pid
863
else:
864
old_checker_pid = None
1334
865
r = Client.start_checker(self, *args, **kwargs)
1335
866
# Only if new checker process was started
1336
867
if (self.checker is not None
1337
868
and old_checker_pid != self.checker.pid):
1338
869
# Emit D-Bus signal
1339
870
self.CheckerStarted(self.current_checker_command)
871
self.PropertyChanged(
872
dbus.String("CheckerRunning"),
873
dbus.Boolean(True, variant_level=1))
1340
874
return r
1341
875
876
def stop_checker(self, *args, **kwargs):
877
old_checker = getattr(self, "checker", None)
878
r = Client.stop_checker(self, *args, **kwargs)
879
if (old_checker is not None
880
and getattr(self, "checker", None) is None):
881
self.PropertyChanged(dbus.String("CheckerRunning"),
882
dbus.Boolean(False, variant_level=1))
883
return r
884
1342
885
def _reset_approved(self):
1343
self.approved = None
886
self._approved = None
1344
887
return False
1345
888
1346
889
def approve(self, value=True):
1347
self.approved = value
1348
gobject.timeout_add(int(self.approval_duration.total_seconds()
1349
* 1000), self._reset_approved)
1350
890
self.send_changedstate()
891
self._approved = value
892
gobject.timeout_add(self._timedelta_to_milliseconds
893
(self.approval_duration),
894
self._reset_approved)
895
1351
896
1352
897
## D-Bus methods, signals & properties
1353
_interface = "se.recompile.Mandos.Client"
1354
1355
## Interfaces
1356
1357
@dbus_interface_annotations(_interface)
1358
def _foo(self):
1359
return { "org.freedesktop.DBus.Property.EmitsChangedSignal":
1360
"false"}
898
_interface = "se.bsnet.fukt.Mandos.Client"
1361
899
1362
900
## Signals
1363
901
1449
987
if value is None: # get
1450
988
return dbus.Boolean(self.approved_by_default)
1451
989
self.approved_by_default = bool(value)
990
# Emit D-Bus signal
991
self.PropertyChanged(dbus.String("ApprovedByDefault"),
992
dbus.Boolean(value, variant_level=1))
1452
993
1453
994
# ApprovalDelay - property
1454
995
@dbus_service_property(_interface, signature="t",
1455
996
access="readwrite")
1456
997
def ApprovalDelay_dbus_property(self, value=None):
1457
998
if value is None: # get
1458
return dbus.UInt64(self.approval_delay.total_seconds()
1459
* 1000)
999
return dbus.UInt64(self.approval_delay_milliseconds())
1460
1000
self.approval_delay = datetime.timedelta(0, 0, 0, value)
1001
# Emit D-Bus signal
1002
self.PropertyChanged(dbus.String("ApprovalDelay"),
1003
dbus.UInt64(value, variant_level=1))
1461
1004
1462
1005
# ApprovalDuration - property
1463
1006
@dbus_service_property(_interface, signature="t",
1464
1007
access="readwrite")
1465
1008
def ApprovalDuration_dbus_property(self, value=None):
1466
1009
if value is None: # get
1467
return dbus.UInt64(self.approval_duration.total_seconds()
1468
* 1000)
1010
return dbus.UInt64(self._timedelta_to_milliseconds(
1011
self.approval_duration))
1469
1012
self.approval_duration = datetime.timedelta(0, 0, 0, value)
1013
# Emit D-Bus signal
1014
self.PropertyChanged(dbus.String("ApprovalDuration"),
1015
dbus.UInt64(value, variant_level=1))
1470
1016
1471
1017
# Name - property
1472
1018
@dbus_service_property(_interface, signature="s", access="read")
1484
1030
def Host_dbus_property(self, value=None):
1485
1031
if value is None: # get
1486
1032
return dbus.String(self.host)
1487
self.host = unicode(value)
1033
self.host = value
1034
# Emit D-Bus signal
1035
self.PropertyChanged(dbus.String("Host"),
1036
dbus.String(value, variant_level=1))
1488
1037
1489
1038
# Created - property
1490
1039
@dbus_service_property(_interface, signature="s", access="read")
1491
1040
def Created_dbus_property(self):
1492
return datetime_to_dbus(self.created)
1041
return dbus.String(self._datetime_to_dbus(self.created))
1493
1042
1494
1043
# LastEnabled - property
1495
1044
@dbus_service_property(_interface, signature="s", access="read")
1496
1045
def LastEnabled_dbus_property(self):
1497
return datetime_to_dbus(self.last_enabled)
1046
if self.last_enabled is None:
1047
return dbus.String("")
1048
return dbus.String(self._datetime_to_dbus(self.last_enabled))
1498
1049
1499
1050
# Enabled - property
1500
1051
@dbus_service_property(_interface, signature="b",
1514
1065
if value is not None:
1515
1066
self.checked_ok()
1516
1067
return
1517
return datetime_to_dbus(self.last_checked_ok)
1518
1519
# LastCheckerStatus - property
1520
@dbus_service_property(_interface, signature="n",
1521
access="read")
1522
def LastCheckerStatus_dbus_property(self):
1523
return dbus.Int16(self.last_checker_status)
1524
1525
# Expires - property
1526
@dbus_service_property(_interface, signature="s", access="read")
1527
def Expires_dbus_property(self):
1528
return datetime_to_dbus(self.expires)
1068
if self.last_checked_ok is None:
1069
return dbus.String("")
1070
return dbus.String(self._datetime_to_dbus(self
1071
.last_checked_ok))
1529
1072
1530
1073
# LastApprovalRequest - property
1531
1074
@dbus_service_property(_interface, signature="s", access="read")
1532
1075
def LastApprovalRequest_dbus_property(self):
1533
return datetime_to_dbus(self.last_approval_request)
1076
if self.last_approval_request is None:
1077
return dbus.String("")
1078
return dbus.String(self.
1079
_datetime_to_dbus(self
1080
.last_approval_request))
1534
1081
1535
1082
# Timeout - property
1536
1083
@dbus_service_property(_interface, signature="t",
1537
1084
access="readwrite")
1538
1085
def Timeout_dbus_property(self, value=None):
1539
1086
if value is None: # get
1540
return dbus.UInt64(self.timeout.total_seconds() * 1000)
1541
old_timeout = self.timeout
1087
return dbus.UInt64(self.timeout_milliseconds())
1542
1088
self.timeout = datetime.timedelta(0, 0, 0, value)
1543
# Reschedule disabling
1544
if self.enabled:
1545
now = datetime.datetime.utcnow()
1546
self.expires += self.timeout - old_timeout
1547
if self.expires <= now:
1548
# The timeout has passed
1549
self.disable()
1550
else:
1551
if (getattr(self, "disable_initiator_tag", None)
1552
is None):
1553
return
1554
gobject.source_remove(self.disable_initiator_tag)
1555
self.disable_initiator_tag = (
1556
gobject.timeout_add(
1557
int((self.expires - now).total_seconds()
1558
* 1000), self.disable))
1559
1560
# ExtendedTimeout - property
1561
@dbus_service_property(_interface, signature="t",
1562
access="readwrite")
1563
def ExtendedTimeout_dbus_property(self, value=None):
1564
if value is None: # get
1565
return dbus.UInt64(self.extended_timeout.total_seconds()
1566
* 1000)
1567
self.extended_timeout = datetime.timedelta(0, 0, 0, value)
1089
# Emit D-Bus signal
1090
self.PropertyChanged(dbus.String("Timeout"),
1091
dbus.UInt64(value, variant_level=1))
1092
if getattr(self, "disable_initiator_tag", None) is None:
1093
return
1094
# Reschedule timeout
1095
gobject.source_remove(self.disable_initiator_tag)
1096
self.disable_initiator_tag = None
1097
time_to_die = (self.
1098
_timedelta_to_milliseconds((self
1099
.last_checked_ok
1100
+ self.timeout)
1101
- datetime.datetime
1102
.utcnow()))
1103
if time_to_die <= 0:
1104
# The timeout has passed
1105
self.disable()
1106
else:
1107
self.disable_initiator_tag = (gobject.timeout_add
1108
(time_to_die, self.disable))
1568
1109
1569
1110
# Interval - property
1570
1111
@dbus_service_property(_interface, signature="t",
1571
1112
access="readwrite")
1572
1113
def Interval_dbus_property(self, value=None):
1573
1114
if value is None: # get
1574
return dbus.UInt64(self.interval.total_seconds() * 1000)
1115
return dbus.UInt64(self.interval_milliseconds())
1575
1116
self.interval = datetime.timedelta(0, 0, 0, value)
1117
# Emit D-Bus signal
1118
self.PropertyChanged(dbus.String("Interval"),
1119
dbus.UInt64(value, variant_level=1))
1576
1120
if getattr(self, "checker_initiator_tag", None) is None:
1577
1121
return
1578
if self.enabled:
1579
# Reschedule checker run
1580
gobject.source_remove(self.checker_initiator_tag)
1581
self.checker_initiator_tag = (gobject.timeout_add
1582
(value, self.start_checker))
1583
self.start_checker() # Start one now, too
1584
1122
# Reschedule checker run
1123
gobject.source_remove(self.checker_initiator_tag)
1124
self.checker_initiator_tag = (gobject.timeout_add
1125
(value, self.start_checker))
1126
self.start_checker() # Start one now, too
1127
1585
1128
# Checker - property
1586
1129
@dbus_service_property(_interface, signature="s",
1587
1130
access="readwrite")
1588
1131
def Checker_dbus_property(self, value=None):
1589
1132
if value is None: # get
1590
1133
return dbus.String(self.checker_command)
1591
self.checker_command = unicode(value)
1134
self.checker_command = value
1135
# Emit D-Bus signal
1136
self.PropertyChanged(dbus.String("Checker"),
1137
dbus.String(self.checker_command,
1138
variant_level=1))
1592
1139
1593
1140
# CheckerRunning - property
1594
1141
@dbus_service_property(_interface, signature="b",
1610
1157
@dbus_service_property(_interface, signature="ay",
1611
1158
access="write", byte_arrays=True)
1612
1159
def Secret_dbus_property(self, value):
1613
self.secret = bytes(value)
1160
self.secret = str(value)
1614
1161
1615
1162
del _interface
1616
1163
1621
1168
self._pipe.send(('init', fpr, address))
1622
1169
if not self._pipe.recv():
1623
1170
raise KeyError()
1624
1171
1625
1172
def __getattribute__(self, name):
1626
if name == '_pipe':
1173
if(name == '_pipe'):
1627
1174
return super(ProxyClient, self).__getattribute__(name)
1628
1175
self._pipe.send(('getattr', name))
1629
1176
data = self._pipe.recv()
1634
1181
self._pipe.send(('funcall', name, args, kwargs))
1635
1182
return self._pipe.recv()[1]
1636
1183
return func
1637
1184
1638
1185
def __setattr__(self, name, value):
1639
if name == '_pipe':
1186
if(name == '_pipe'):
1640
1187
return super(ProxyClient, self).__setattr__(name, value)
1641
1188
self._pipe.send(('setattr', name, value))
1642
1189
1653
1200
unicode(self.client_address))
1654
1201
logger.debug("Pipe FD: %d",
1655
1202
self.server.child_pipe.fileno())
1656
1203
1657
1204
session = (gnutls.connection
1658
1205
.ClientSession(self.request,
1659
1206
gnutls.connection
1660
1207
.X509Credentials()))
1661
1208
1662
1209
# Note: gnutls.connection.X509Credentials is really a
1663
1210
# generic GnuTLS certificate credentials object so long as
1664
1211
# no X.509 keys are added to it. Therefore, we can use it
1665
1212
# here despite using OpenPGP certificates.
1666
1213
1667
1214
#priority = ':'.join(("NONE", "+VERS-TLS1.1",
1668
1215
# "+AES-256-CBC", "+SHA1",
1669
1216
# "+COMP-NULL", "+CTYPE-OPENPGP",
1675
1222
(gnutls.library.functions
1676
1223
.gnutls_priority_set_direct(session._c_object,
1677
1224
priority, None))
1678
1225
1679
1226
# Start communication using the Mandos protocol
1680
1227
# Get protocol number
1681
1228
line = self.request.makefile().readline()
1682
1229
logger.debug("Protocol version: %r", line)
1683
1230
try:
1684
1231
if int(line.strip().split()[0]) > 1:
1685
raise RuntimeError(line)
1232
raise RuntimeError
1686
1233
except (ValueError, IndexError, RuntimeError) as error:
1687
1234
logger.error("Unknown protocol version: %s", error)
1688
1235
return
1689
1236
1690
1237
# Start GnuTLS connection
1691
1238
try:
1692
1239
session.handshake()
1696
1243
# established. Just abandon the request.
1697
1244
return
1698
1245
logger.debug("Handshake succeeded")
1699
1246
1700
1247
approval_required = False
1701
1248
try:
1702
1249
try:
1707
1254
logger.warning("Bad certificate: %s", error)
1708
1255
return
1709
1256
logger.debug("Fingerprint: %s", fpr)
1710
1257
1711
1258
try:
1712
1259
client = ProxyClient(child_pipe, fpr,
1713
1260
self.client_address)
1725
1272
client.name)
1726
1273
if self.server.use_dbus:
1727
1274
# Emit D-Bus signal
1728
client.Rejected("Disabled")
1275
client.Rejected("Disabled")
1729
1276
return
1730
1277
1731
if client.approved or not client.approval_delay:
1278
if client._approved or not client.approval_delay:
1732
1279
#We are approved or approval is disabled
1733
1280
break
1734
elif client.approved is None:
1281
elif client._approved is None:
1735
1282
logger.info("Client %s needs approval",
1736
1283
client.name)
1737
1284
if self.server.use_dbus:
1738
1285
# Emit D-Bus signal
1739
1286
client.NeedApproval(
1740
client.approval_delay.total_seconds()
1741
* 1000, client.approved_by_default)
1287
client.approval_delay_milliseconds(),
1288
client.approved_by_default)
1742
1289
else:
1743
1290
logger.warning("Client %s was not approved",
1744
1291
client.name)
1748
1295
return
1749
1296
1750
1297
#wait until timeout or approved
1298
#x = float(client._timedelta_to_milliseconds(delay))
1751
1299
time = datetime.datetime.now()
1752
1300
client.changedstate.acquire()
1753
client.changedstate.wait(delay.total_seconds())
1301
client.changedstate.wait(float(client._timedelta_to_milliseconds(delay) / 1000))
1754
1302
client.changedstate.release()
1755
1303
time2 = datetime.datetime.now()
1756
1304
if (time2 - time) >= delay:
1772
1320
try:
1773
1321
sent = session.send(client.secret[sent_size:])
1774
1322
except gnutls.errors.GNUTLSError as error:
1775
logger.warning("gnutls send failed",
1776
exc_info=error)
1323
logger.warning("gnutls send failed")
1777
1324
return
1778
1325
logger.debug("Sent: %d, remaining: %d",
1779
1326
sent, len(client.secret)
1780
1327
- (sent_size + sent))
1781
1328
sent_size += sent
1782
1329
1783
1330
logger.info("Sending secret to %s", client.name)
1784
# bump the timeout using extended_timeout
1785
client.bump_timeout(client.extended_timeout)
1331
# bump the timeout as if seen
1332
client.checked_ok()
1786
1333
if self.server.use_dbus:
1787
1334
# Emit D-Bus signal
1788
1335
client.GotSecret()
1793
1340
try:
1794
1341
session.bye()
1795
1342
except gnutls.errors.GNUTLSError as error:
1796
logger.warning("GnuTLS bye failed",
1797
exc_info=error)
1343
logger.warning("GnuTLS bye failed")
1798
1344
1799
1345
@staticmethod
1800
1346
def peer_certificate(session):
1856
1402
# Convert the buffer to a Python bytestring
1857
1403
fpr = ctypes.string_at(buf, buf_len.value)
1858
1404
# Convert the bytestring to hexadecimal notation
1859
hex_fpr = binascii.hexlify(fpr).upper()
1405
hex_fpr = ''.join("%02X" % ord(char) for char in fpr)
1860
1406
return hex_fpr
1861
1407
1862
1408
1865
1411
def sub_process_main(self, request, address):
1866
1412
try:
1867
1413
self.finish_request(request, address)
1868
except Exception:
1414
except:
1869
1415
self.handle_error(request, address)
1870
1416
self.close_request(request)
1871
1417
1872
1418
def process_request(self, request, address):
1873
1419
"""Start a new process to process the request."""
1874
proc = multiprocessing.Process(target = self.sub_process_main,
1875
args = (request, address))
1876
proc.start()
1877
return proc
1878
1420
multiprocessing.Process(target = self.sub_process_main,
1421
args = (request, address)).start()
1879
1422
1880
1423
class MultiprocessingMixInWithPipe(MultiprocessingMixIn, object):
1881
1424
""" adds a pipe to the MixIn """
1885
1428
This function creates a new pipe in self.pipe
1886
1429
"""
1887
1430
parent_pipe, self.child_pipe = multiprocessing.Pipe()
1888
1889
proc = MultiprocessingMixIn.process_request(self, request,
1890
client_address)
1431
1432
super(MultiprocessingMixInWithPipe,
1433
self).process_request(request, client_address)
1891
1434
self.child_pipe.close()
1892
self.add_pipe(parent_pipe, proc)
1893
1894
def add_pipe(self, parent_pipe, proc):
1435
self.add_pipe(parent_pipe)
1436
1437
def add_pipe(self, parent_pipe):
1895
1438
"""Dummy function; override as necessary"""
1896
raise NotImplementedError()
1897
1439
raise NotImplementedError
1898
1440
1899
1441
class IPv6_TCPServer(MultiprocessingMixInWithPipe,
1900
1442
socketserver.TCPServer, object):
1906
1448
use_ipv6: Boolean; to use IPv6 or not
1907
1449
"""
1908
1450
def __init__(self, server_address, RequestHandlerClass,
1909
interface=None, use_ipv6=True, socketfd=None):
1910
"""If socketfd is set, use that file descriptor instead of
1911
creating a new one with socket.socket().
1912
"""
1451
interface=None, use_ipv6=True):
1913
1452
self.interface = interface
1914
1453
if use_ipv6:
1915
1454
self.address_family = socket.AF_INET6
1916
if socketfd is not None:
1917
# Save the file descriptor
1918
self.socketfd = socketfd
1919
# Save the original socket.socket() function
1920
self.socket_socket = socket.socket
1921
# To implement --socket, we monkey patch socket.socket.
1922
#
1923
# (When socketserver.TCPServer is a new-style class, we
1924
# could make self.socket into a property instead of monkey
1925
# patching socket.socket.)
1926
#
1927
# Create a one-time-only replacement for socket.socket()
1928
@functools.wraps(socket.socket)
1929
def socket_wrapper(*args, **kwargs):
1930
# Restore original function so subsequent calls are
1931
# not affected.
1932
socket.socket = self.socket_socket
1933
del self.socket_socket
1934
# This time only, return a new socket object from the
1935
# saved file descriptor.
1936
return socket.fromfd(self.socketfd, *args, **kwargs)
1937
# Replace socket.socket() function with wrapper
1938
socket.socket = socket_wrapper
1939
# The socketserver.TCPServer.__init__ will call
1940
# socket.socket(), which might be our replacement,
1941
# socket_wrapper(), if socketfd was set.
1942
1455
socketserver.TCPServer.__init__(self, server_address,
1943
1456
RequestHandlerClass)
1944
1945
1457
def server_bind(self):
1946
1458
"""This overrides the normal server_bind() function
1947
1459
to bind to an interface if one was specified, and also NOT to
1955
1467
try:
1956
1468
self.socket.setsockopt(socket.SOL_SOCKET,
1957
1469
SO_BINDTODEVICE,
1958
(self.interface + "\0")
1959
.encode("utf-8"))
1470
str(self.interface
1471
+ '\0'))
1960
1472
except socket.error as error:
1961
if error.errno == errno.EPERM:
1962
logger.error("No permission to bind to"
1963
" interface %s", self.interface)
1964
elif error.errno == errno.ENOPROTOOPT:
1473
if error[0] == errno.EPERM:
1474
logger.error("No permission to"
1475
" bind to interface %s",
1476
self.interface)
1477
elif error[0] == errno.ENOPROTOOPT:
1965
1478
logger.error("SO_BINDTODEVICE not available;"
1966
1479
" cannot bind to interface %s",
1967
1480
self.interface)
1968
elif error.errno == errno.ENODEV:
1969
logger.error("Interface %s does not exist,"
1970
" cannot bind", self.interface)
1971
1481
else:
1972
1482
raise
1973
1483
# Only bind(2) the socket if we really need to.
1976
1486
if self.address_family == socket.AF_INET6:
1977
1487
any_address = "::" # in6addr_any
1978
1488
else:
1979
any_address = "0.0.0.0" # INADDR_ANY
1489
any_address = socket.INADDR_ANY
1980
1490
self.server_address = (any_address,
1981
1491
self.server_address[1])
1982
1492
elif not self.server_address[1]:
2003
1513
"""
2004
1514
def __init__(self, server_address, RequestHandlerClass,
2005
1515
interface=None, use_ipv6=True, clients=None,
2006
gnutls_priority=None, use_dbus=True, socketfd=None):
1516
gnutls_priority=None, use_dbus=True):
2007
1517
self.enabled = False
2008
1518
self.clients = clients
2009
1519
if self.clients is None:
2010
self.clients = {}
1520
self.clients = set()
2011
1521
self.use_dbus = use_dbus
2012
1522
self.gnutls_priority = gnutls_priority
2013
1523
IPv6_TCPServer.__init__(self, server_address,
2014
1524
RequestHandlerClass,
2015
1525
interface = interface,
2016
use_ipv6 = use_ipv6,
2017
socketfd = socketfd)
1526
use_ipv6 = use_ipv6)
2018
1527
def server_activate(self):
2019
1528
if self.enabled:
2020
1529
return socketserver.TCPServer.server_activate(self)
2021
2022
1530
def enable(self):
2023
1531
self.enabled = True
2024
2025
def add_pipe(self, parent_pipe, proc):
1532
def add_pipe(self, parent_pipe):
2026
1533
# Call "handle_ipc" for both data and EOF events
2027
1534
gobject.io_add_watch(parent_pipe.fileno(),
2028
1535
gobject.IO_IN | gobject.IO_HUP,
2029
1536
functools.partial(self.handle_ipc,
2030
parent_pipe =
2031
parent_pipe,
2032
proc = proc))
2033
1537
parent_pipe = parent_pipe))
1538
2034
1539
def handle_ipc(self, source, condition, parent_pipe=None,
2035
proc = None, client_object=None):
2036
# error, or the other end of multiprocessing.Pipe has closed
2037
if condition & (gobject.IO_ERR | gobject.IO_HUP):
2038
# Wait for other process to exit
2039
proc.join()
1540
client_object=None):
1541
condition_names = {
1542
gobject.IO_IN: "IN", # There is data to read.
1543
gobject.IO_OUT: "OUT", # Data can be written (without
1544
# blocking).
1545
gobject.IO_PRI: "PRI", # There is urgent data to read.
1546
gobject.IO_ERR: "ERR", # Error condition.
1547
gobject.IO_HUP: "HUP" # Hung up (the connection has been
1548
# broken, usually for pipes and
1549
# sockets).
1550
}
1551
conditions_string = ' | '.join(name
1552
for cond, name in
1553
condition_names.iteritems()
1554
if cond & condition)
1555
# error or the other end of multiprocessing.Pipe has closed
1556
if condition & (gobject.IO_ERR | condition & gobject.IO_HUP):
2040
1557
return False
2041
1558
2042
1559
# Read a request from the child
2047
1564
fpr = request[1]
2048
1565
address = request[2]
2049
1566
2050
for c in self.clients.itervalues():
1567
for c in self.clients:
2051
1568
if c.fingerprint == fpr:
2052
1569
client = c
2053
1570
break
2056
1573
"dress: %s", fpr, address)
2057
1574
if self.use_dbus:
2058
1575
# Emit D-Bus signal
2059
mandos_dbus_service.ClientNotFound(fpr,
2060
address[0])
1576
mandos_dbus_service.ClientNotFound(fpr, address[0])
2061
1577
parent_pipe.send(False)
2062
1578
return False
2063
1579
2064
1580
gobject.io_add_watch(parent_pipe.fileno(),
2065
1581
gobject.IO_IN | gobject.IO_HUP,
2066
1582
functools.partial(self.handle_ipc,
2067
parent_pipe =
2068
parent_pipe,
2069
proc = proc,
2070
client_object =
2071
client))
1583
parent_pipe = parent_pipe,
1584
client_object = client))
2072
1585
parent_pipe.send(True)
2073
# remove the old hook in favor of the new above hook on
2074
# same fileno
1586
# remove the old hook in favor of the new above hook on same fileno
2075
1587
return False
2076
1588
if command == 'funcall':
2077
1589
funcname = request[1]
2078
1590
args = request[2]
2079
1591
kwargs = request[3]
2080
1592
2081
parent_pipe.send(('data', getattr(client_object,
2082
funcname)(*args,
2083
**kwargs)))
2084
1593
parent_pipe.send(('data', getattr(client_object, funcname)(*args, **kwargs)))
1594
2085
1595
if command == 'getattr':
2086
1596
attrname = request[1]
2087
1597
if callable(client_object.__getattribute__(attrname)):
2088
1598
parent_pipe.send(('function',))
2089
1599
else:
2090
parent_pipe.send(('data', client_object
2091
.__getattribute__(attrname)))
1600
parent_pipe.send(('data', client_object.__getattribute__(attrname)))
2092
1601
2093
1602
if command == 'setattr':
2094
1603
attrname = request[1]
2095
1604
value = request[2]
2096
1605
setattr(client_object, attrname, value)
2097
1606
2098
1607
return True
2099
1608
2100
1609
2101
def rfc3339_duration_to_delta(duration):
2102
"""Parse an RFC 3339 "duration" and return a datetime.timedelta
2103
2104
>>> rfc3339_duration_to_delta("P7D")
2105
datetime.timedelta(7)
2106
>>> rfc3339_duration_to_delta("PT60S")
2107
datetime.timedelta(0, 60)
2108
>>> rfc3339_duration_to_delta("PT60M")
2109
datetime.timedelta(0, 3600)
2110
>>> rfc3339_duration_to_delta("PT24H")
2111
datetime.timedelta(1)
2112
>>> rfc3339_duration_to_delta("P1W")
2113
datetime.timedelta(7)
2114
>>> rfc3339_duration_to_delta("PT5M30S")
2115
datetime.timedelta(0, 330)
2116
>>> rfc3339_duration_to_delta("P1DT3M20S")
2117
datetime.timedelta(1, 200)
2118
"""
2119
2120
# Parsing an RFC 3339 duration with regular expressions is not
2121
# possible - there would have to be multiple places for the same
2122
# values, like seconds. The current code, while more esoteric, is
2123
# cleaner without depending on a parsing library. If Python had a
2124
# built-in library for parsing we would use it, but we'd like to
2125
# avoid excessive use of external libraries.
2126
2127
# New type for defining tokens, syntax, and semantics all-in-one
2128
Token = collections.namedtuple("Token",
2129
("regexp", # To match token; if
2130
# "value" is not None,
2131
# must have a "group"
2132
# containing digits
2133
"value", # datetime.timedelta or
2134
# None
2135
"followers")) # Tokens valid after
2136
# this token
2137
# RFC 3339 "duration" tokens, syntax, and semantics; taken from
2138
# the "duration" ABNF definition in RFC 3339, Appendix A.
2139
token_end = Token(re.compile(r"$"), None, frozenset())
2140
token_second = Token(re.compile(r"(\d+)S"),
2141
datetime.timedelta(seconds=1),
2142
frozenset((token_end,)))
2143
token_minute = Token(re.compile(r"(\d+)M"),
2144
datetime.timedelta(minutes=1),
2145
frozenset((token_second, token_end)))
2146
token_hour = Token(re.compile(r"(\d+)H"),
2147
datetime.timedelta(hours=1),
2148
frozenset((token_minute, token_end)))
2149
token_time = Token(re.compile(r"T"),
2150
None,
2151
frozenset((token_hour, token_minute,
2152
token_second)))
2153
token_day = Token(re.compile(r"(\d+)D"),
2154
datetime.timedelta(days=1),
2155
frozenset((token_time, token_end)))
2156
token_month = Token(re.compile(r"(\d+)M"),
2157
datetime.timedelta(weeks=4),
2158
frozenset((token_day, token_end)))
2159
token_year = Token(re.compile(r"(\d+)Y"),
2160
datetime.timedelta(weeks=52),
2161
frozenset((token_month, token_end)))
2162
token_week = Token(re.compile(r"(\d+)W"),
2163
datetime.timedelta(weeks=1),
2164
frozenset((token_end,)))
2165
token_duration = Token(re.compile(r"P"), None,
2166
frozenset((token_year, token_month,
2167
token_day, token_time,
2168
token_week)))
2169
# Define starting values
2170
value = datetime.timedelta() # Value so far
2171
found_token = None
2172
followers = frozenset((token_duration,)) # Following valid tokens
2173
s = duration # String left to parse
2174
# Loop until end token is found
2175
while found_token is not token_end:
2176
# Search for any currently valid tokens
2177
for token in followers:
2178
match = token.regexp.match(s)
2179
if match is not None:
2180
# Token found
2181
if token.value is not None:
2182
# Value found, parse digits
2183
factor = int(match.group(1), 10)
2184
# Add to value so far
2185
value += factor * token.value
2186
# Strip token from string
2187
s = token.regexp.sub("", s, 1)
2188
# Go to found token
2189
found_token = token
2190
# Set valid next tokens
2191
followers = found_token.followers
2192
break
2193
else:
2194
# No currently valid tokens were found
2195
raise ValueError("Invalid RFC 3339 duration")
2196
# End token found
2197
return value
2198
2199
2200
1610
def string_to_delta(interval):
2201
1611
"""Parse a string and return a datetime.timedelta
2202
1612
2213
1623
>>> string_to_delta('5m 30s')
2214
1624
datetime.timedelta(0, 330)
2215
1625
"""
2216
2217
try:
2218
return rfc3339_duration_to_delta(interval)
2219
except ValueError:
2220
pass
2221
2222
1626
timevalue = datetime.timedelta(0)
2223
1627
for s in interval.split():
2224
1628
try:
2225
suffix = s[-1]
1629
suffix = unicode(s[-1])
2226
1630
value = int(s[:-1])
2227
1631
if suffix == "d":
2228
1632
delta = datetime.timedelta(value)
2235
1639
elif suffix == "w":
2236
1640
delta = datetime.timedelta(0, 0, 0, 0, 0, 0, value)
2237
1641
else:
2238
raise ValueError("Unknown suffix {!r}"
2239
.format(suffix))
2240
except IndexError as e:
1642
raise ValueError("Unknown suffix %r" % suffix)
1643
except (ValueError, IndexError) as e:
2241
1644
raise ValueError(*(e.args))
2242
1645
timevalue += delta
2243
1646
return timevalue
2244
1647
2245
1648
1649
def if_nametoindex(interface):
1650
"""Call the C function if_nametoindex(), or equivalent
1651
1652
Note: This function cannot accept a unicode string."""
1653
global if_nametoindex
1654
try:
1655
if_nametoindex = (ctypes.cdll.LoadLibrary
1656
(ctypes.util.find_library("c"))
1657
.if_nametoindex)
1658
except (OSError, AttributeError):
1659
logger.warning("Doing if_nametoindex the hard way")
1660
def if_nametoindex(interface):
1661
"Get an interface index the hard way, i.e. using fcntl()"
1662
SIOCGIFINDEX = 0x8933 # From /usr/include/linux/sockios.h
1663
with contextlib.closing(socket.socket()) as s:
1664
ifreq = fcntl.ioctl(s, SIOCGIFINDEX,
1665
struct.pack(str("16s16x"),
1666
interface))
1667
interface_index = struct.unpack(str("I"),
1668
ifreq[16:20])[0]
1669
return interface_index
1670
return if_nametoindex(interface)
1671
1672
2246
1673
def daemon(nochdir = False, noclose = False):
2247
1674
"""See daemon(3). Standard BSD Unix function.
2248
1675
2256
1683
sys.exit()
2257
1684
if not noclose:
2258
1685
# Close all standard open file descriptors
2259
null = os.open(os.devnull, os.O_NOCTTY | os.O_RDWR)
1686
null = os.open(os.path.devnull, os.O_NOCTTY | os.O_RDWR)
2260
1687
if not stat.S_ISCHR(os.fstat(null).st_mode):
2261
raise OSError(errno.ENODEV, "{} not a character device"
2262
.format(os.devnull))
1688
raise OSError(errno.ENODEV,
1689
"%s not a character device"
1690
% os.path.devnull)
2263
1691
os.dup2(null, sys.stdin.fileno())
2264
1692
os.dup2(null, sys.stdout.fileno())
2265
1693
os.dup2(null, sys.stderr.fileno())
2274
1702
2275
1703
parser = argparse.ArgumentParser()
2276
1704
parser.add_argument("-v", "--version", action="version",
2277
version = "%(prog)s {}".format(version),
1705
version = "%%(prog)s %s" % version,
2278
1706
help="show version number and exit")
2279
1707
parser.add_argument("-i", "--interface", metavar="IF",
2280
1708
help="Bind to interface IF")
2286
1714
help="Run self-test")
2287
1715
parser.add_argument("--debug", action="store_true",
2288
1716
help="Debug mode; run in foreground and log"
2289
" to terminal", default=None)
1717
" to terminal")
2290
1718
parser.add_argument("--debuglevel", metavar="LEVEL",
2291
1719
help="Debug level for stdout output")
2292
1720
parser.add_argument("--priority", help="GnuTLS"
2299
1727
" files")
2300
1728
parser.add_argument("--no-dbus", action="store_false",
2301
1729
dest="use_dbus", help="Do not provide D-Bus"
2302
" system bus interface", default=None)
1730
" system bus interface")
2303
1731
parser.add_argument("--no-ipv6", action="store_false",
2304
dest="use_ipv6", help="Do not use IPv6",
2305
default=None)
2306
parser.add_argument("--no-restore", action="store_false",
2307
dest="restore", help="Do not restore stored"
2308
" state", default=None)
2309
parser.add_argument("--socket", type=int,
2310
help="Specify a file descriptor to a network"
2311
" socket to use instead of creating one")
2312
parser.add_argument("--statedir", metavar="DIR",
2313
help="Directory to save/restore state in")
2314
parser.add_argument("--foreground", action="store_true",
2315
help="Run in foreground", default=None)
2316
parser.add_argument("--no-zeroconf", action="store_false",
2317
dest="zeroconf", help="Do not use Zeroconf",
2318
default=None)
2319
1732
dest="use_ipv6", help="Do not use IPv6")
2320
1733
options = parser.parse_args()
2321
1734
2322
1735
if options.check:
2323
1736
import doctest
2324
fail_count, test_count = doctest.testmod()
2325
sys.exit(os.EX_OK if fail_count == 0 else 1)
1737
doctest.testmod()
1738
sys.exit()
2326
1739
2327
1740
# Default values for config file for server-global settings
2328
1741
server_defaults = { "interface": "",
2330
1743
"port": "",
2331
1744
"debug": "False",
2332
1745
"priority":
2333
"SECURE256:!CTYPE-X.509:+CTYPE-OPENPGP:+SIGN-RSA-SHA224:+SIGN-RSA-RMD160",
1746
"SECURE256:!CTYPE-X.509:+CTYPE-OPENPGP",
2334
1747
"servicename": "Mandos",
2335
1748
"use_dbus": "True",
2336
1749
"use_ipv6": "True",
2337
1750
"debuglevel": "",
2338
"restore": "True",
2339
"socket": "",
2340
"statedir": "/var/lib/mandos",
2341
"foreground": "False",
2342
"zeroconf": "True",
2343
1751
}
2344
1752
2345
1753
# Parse config file for server-global settings
2350
1758
# Convert the SafeConfigParser object to a dict
2351
1759
server_settings = server_config.defaults()
2352
1760
# Use the appropriate methods on the non-string config options
2353
for option in ("debug", "use_dbus", "use_ipv6", "foreground"):
1761
for option in ("debug", "use_dbus", "use_ipv6"):
2354
1762
server_settings[option] = server_config.getboolean("DEFAULT",
2355
1763
option)
2356
1764
if server_settings["port"]:
2357
1765
server_settings["port"] = server_config.getint("DEFAULT",
2358
1766
"port")
2359
if server_settings["socket"]:
2360
server_settings["socket"] = server_config.getint("DEFAULT",
2361
"socket")
2362
# Later, stdin will, and stdout and stderr might, be dup'ed
2363
# over with an opened os.devnull. But we don't want this to
2364
# happen with a supplied network socket.
2365
if 0 <= server_settings["socket"] <= 2:
2366
server_settings["socket"] = os.dup(server_settings
2367
["socket"])
2368
1767
del server_config
2369
1768
2370
1769
# Override the settings from the config file with command line
2371
1770
# options, if set.
2372
1771
for option in ("interface", "address", "port", "debug",
2373
1772
"priority", "servicename", "configdir",
2374
"use_dbus", "use_ipv6", "debuglevel", "restore",
2375
"statedir", "socket", "foreground", "zeroconf"):
1773
"use_dbus", "use_ipv6", "debuglevel"):
2376
1774
value = getattr(options, option)
2377
1775
if value is not None:
2378
1776
server_settings[option] = value
2379
1777
del options
2380
1778
# Force all strings to be unicode
2381
1779
for option in server_settings.keys():
2382
if isinstance(server_settings[option], bytes):
2383
server_settings[option] = (server_settings[option]
2384
.decode("utf-8"))
2385
# Force all boolean options to be boolean
2386
for option in ("debug", "use_dbus", "use_ipv6", "restore",
2387
"foreground", "zeroconf"):
2388
server_settings[option] = bool(server_settings[option])
2389
# Debug implies foreground
2390
if server_settings["debug"]:
2391
server_settings["foreground"] = True
1780
if type(server_settings[option]) is str:
1781
server_settings[option] = unicode(server_settings[option])
2392
1782
# Now we have our good server settings in "server_settings"
2393
1783
2394
1784
##################################################################
2395
1785
2396
if (not server_settings["zeroconf"] and
2397
not (server_settings["port"]
2398
or server_settings["socket"] != "")):
2399
parser.error("Needs port or socket to work without"
2400
" Zeroconf")
2401
2402
1786
# For convenience
2403
1787
debug = server_settings["debug"]
2404
1788
debuglevel = server_settings["debuglevel"]
2405
1789
use_dbus = server_settings["use_dbus"]
2406
1790
use_ipv6 = server_settings["use_ipv6"]
2407
stored_state_path = os.path.join(server_settings["statedir"],
2408
stored_state_file)
2409
foreground = server_settings["foreground"]
2410
zeroconf = server_settings["zeroconf"]
2411
2412
if debug:
2413
initlogger(debug, logging.DEBUG)
2414
else:
2415
if not debuglevel:
2416
initlogger(debug)
2417
else:
2418
level = getattr(logging, debuglevel.upper())
2419
initlogger(debug, level)
2420
1791
2421
1792
if server_settings["servicename"] != "Mandos":
2422
1793
syslogger.setFormatter(logging.Formatter
2423
('Mandos ({}) [%(process)d]:'
2424
' %(levelname)s: %(message)s'
2425
.format(server_settings
2426
["servicename"])))
1794
('Mandos (%s) [%%(process)d]:'
1795
' %%(levelname)s: %%(message)s'
1796
% server_settings["servicename"]))
2427
1797
2428
1798
# Parse config file with clients
2429
client_config = configparser.SafeConfigParser(Client
2430
.client_defaults)
1799
client_defaults = { "timeout": "1h",
1800
"interval": "5m",
1801
"checker": "fping -q -- %%(host)s",
1802
"host": "",
1803
"approval_delay": "0s",
1804
"approval_duration": "1s",
1805
}
1806
client_config = configparser.SafeConfigParser(client_defaults)
2431
1807
client_config.read(os.path.join(server_settings["configdir"],
2432
1808
"clients.conf"))
2433
1809
2434
1810
global mandos_dbus_service
2435
1811
mandos_dbus_service = None
2436
1812
2437
socketfd = None
2438
if server_settings["socket"] != "":
2439
socketfd = server_settings["socket"]
2440
1813
tcp_server = MandosServer((server_settings["address"],
2441
1814
server_settings["port"]),
2442
1815
ClientHandler,
2445
1818
use_ipv6=use_ipv6,
2446
1819
gnutls_priority=
2447
1820
server_settings["priority"],
2448
use_dbus=use_dbus,
2449
socketfd=socketfd)
2450
if not foreground:
2451
pidfilename = "/run/mandos.pid"
2452
if not os.path.isdir("/run/."):
2453
pidfilename = "/var/run/mandos.pid"
2454
pidfile = None
1821
use_dbus=use_dbus)
1822
if not debug:
1823
pidfilename = "/var/run/mandos.pid"
2455
1824
try:
2456
1825
pidfile = open(pidfilename, "w")
2457
except IOError as e:
2458
logger.error("Could not open file %r", pidfilename,
2459
exc_info=e)
1826
except IOError:
1827
logger.error("Could not open file %r", pidfilename)
2460
1828
2461
for name in ("_mandos", "mandos", "nobody"):
1829
try:
1830
uid = pwd.getpwnam("_mandos").pw_uid
1831
gid = pwd.getpwnam("_mandos").pw_gid
1832
except KeyError:
2462
1833
try:
2463
uid = pwd.getpwnam(name).pw_uid
2464
gid = pwd.getpwnam(name).pw_gid
2465
break
1834
uid = pwd.getpwnam("mandos").pw_uid
1835
gid = pwd.getpwnam("mandos").pw_gid
2466
1836
except KeyError:
2467
continue
2468
else:
2469
uid = 65534
2470
gid = 65534
1837
try:
1838
uid = pwd.getpwnam("nobody").pw_uid
1839
gid = pwd.getpwnam("nobody").pw_gid
1840
except KeyError:
1841
uid = 65534
1842
gid = 65534
2471
1843
try:
2472
1844
os.setgid(gid)
2473
1845
os.setuid(uid)
2474
1846
except OSError as error:
2475
if error.errno != errno.EPERM:
2476
raise
1847
if error[0] != errno.EPERM:
1848
raise error
2477
1849
1850
if not debug and not debuglevel:
1851
syslogger.setLevel(logging.WARNING)
1852
console.setLevel(logging.WARNING)
1853
if debuglevel:
1854
level = getattr(logging, debuglevel.upper())
1855
syslogger.setLevel(level)
1856
console.setLevel(level)
1857
2478
1858
if debug:
2479
1859
# Enable all possible GnuTLS debugging
2480
1860
2490
1870
.gnutls_global_set_log_function(debug_gnutls))
2491
1871
2492
1872
# Redirect stdin so all checkers get /dev/null
2493
null = os.open(os.devnull, os.O_NOCTTY | os.O_RDWR)
1873
null = os.open(os.path.devnull, os.O_NOCTTY | os.O_RDWR)
2494
1874
os.dup2(null, sys.stdin.fileno())
2495
1875
if null > 2:
2496
1876
os.close(null)
1877
else:
1878
# No console logging
1879
logger.removeHandler(console)
2497
1880
2498
1881
# Need to fork before connecting to D-Bus
2499
if not foreground:
1882
if not debug:
2500
1883
# Close all input and output, do double fork, etc.
2501
1884
daemon()
2502
1885
2503
# multiprocessing will use threads, so before we use gobject we
2504
# need to inform gobject that threads will be used.
2505
gobject.threads_init()
2506
2507
1886
global main_loop
2508
1887
# From the Avahi example code
2509
DBusGMainLoop(set_as_default=True)
1888
DBusGMainLoop(set_as_default=True )
2510
1889
main_loop = gobject.MainLoop()
2511
1890
bus = dbus.SystemBus()
2512
1891
# End of Avahi example code
2513
1892
if use_dbus:
2514
1893
try:
2515
bus_name = dbus.service.BusName("se.recompile.Mandos",
1894
bus_name = dbus.service.BusName("se.bsnet.fukt.Mandos",
2516
1895
bus, do_not_queue=True)
2517
old_bus_name = (dbus.service.BusName
2518
("se.bsnet.fukt.Mandos", bus,
2519
do_not_queue=True))
2520
1896
except dbus.exceptions.NameExistsException as e:
2521
logger.error("Disabling D-Bus:", exc_info=e)
1897
logger.error(unicode(e) + ", disabling D-Bus")
2522
1898
use_dbus = False
2523
1899
server_settings["use_dbus"] = False
2524
1900
tcp_server.use_dbus = False
2525
if zeroconf:
2526
protocol = avahi.PROTO_INET6 if use_ipv6 else avahi.PROTO_INET
2527
service = AvahiServiceToSyslog(name =
2528
server_settings["servicename"],
2529
servicetype = "_mandos._tcp",
2530
protocol = protocol, bus = bus)
2531
if server_settings["interface"]:
2532
service.interface = (if_nametoindex
2533
(server_settings["interface"]
2534
.encode("utf-8")))
1901
protocol = avahi.PROTO_INET6 if use_ipv6 else avahi.PROTO_INET
1902
service = AvahiService(name = server_settings["servicename"],
1903
servicetype = "_mandos._tcp",
1904
protocol = protocol, bus = bus)
1905
if server_settings["interface"]:
1906
service.interface = (if_nametoindex
1907
(str(server_settings["interface"])))
2535
1908
2536
1909
global multiprocessing_manager
2537
1910
multiprocessing_manager = multiprocessing.Manager()
2539
1912
client_class = Client
2540
1913
if use_dbus:
2541
1914
client_class = functools.partial(ClientDBus, bus = bus)
2542
2543
client_settings = Client.config_parser(client_config)
2544
old_client_settings = {}
2545
clients_data = {}
2546
2547
# This is used to redirect stdout and stderr for checker processes
2548
global wnull
2549
wnull = open(os.devnull, "w") # A writable /dev/null
2550
# Only used if server is running in foreground but not in debug
2551
# mode
2552
if debug or not foreground:
2553
wnull.close()
2554
2555
# Get client data and settings from last running state.
2556
if server_settings["restore"]:
2557
try:
2558
with open(stored_state_path, "rb") as stored_state:
2559
clients_data, old_client_settings = (pickle.load
2560
(stored_state))
2561
os.remove(stored_state_path)
2562
except IOError as e:
2563
if e.errno == errno.ENOENT:
2564
logger.warning("Could not load persistent state: {}"
2565
.format(os.strerror(e.errno)))
2566
else:
2567
logger.critical("Could not load persistent state:",
2568
exc_info=e)
2569
raise
2570
except EOFError as e:
2571
logger.warning("Could not load persistent state: "
2572
"EOFError:", exc_info=e)
2573
2574
with PGPEngine() as pgp:
2575
for client_name, client in clients_data.items():
2576
# Skip removed clients
2577
if client_name not in client_settings:
2578
continue
2579
2580
# Decide which value to use after restoring saved state.
2581
# We have three different values: Old config file,
2582
# new config file, and saved state.
2583
# New config value takes precedence if it differs from old
2584
# config value, otherwise use saved state.
2585
for name, value in client_settings[client_name].items():
2586
try:
2587
# For each value in new config, check if it
2588
# differs from the old config value (Except for
2589
# the "secret" attribute)
2590
if (name != "secret" and
2591
value != old_client_settings[client_name]
2592
[name]):
2593
client[name] = value
2594
except KeyError:
2595
pass
2596
2597
# Clients who has passed its expire date can still be
2598
# enabled if its last checker was successful. Clients
2599
# whose checker succeeded before we stored its state is
2600
# assumed to have successfully run all checkers during
2601
# downtime.
2602
if client["enabled"]:
2603
if datetime.datetime.utcnow() >= client["expires"]:
2604
if not client["last_checked_ok"]:
2605
logger.warning(
2606
"disabling client {} - Client never "
2607
"performed a successful checker"
2608
.format(client_name))
2609
client["enabled"] = False
2610
elif client["last_checker_status"] != 0:
2611
logger.warning(
2612
"disabling client {} - Client last"
2613
" checker failed with error code {}"
2614
.format(client_name,
2615
client["last_checker_status"]))
2616
client["enabled"] = False
2617
else:
2618
client["expires"] = (datetime.datetime
2619
.utcnow()
2620
+ client["timeout"])
2621
logger.debug("Last checker succeeded,"
2622
" keeping {} enabled"
2623
.format(client_name))
1915
def client_config_items(config, section):
1916
special_settings = {
1917
"approved_by_default":
1918
lambda: config.getboolean(section,
1919
"approved_by_default"),
1920
}
1921
for name, value in config.items(section):
2624
1922
try:
2625
client["secret"] = (
2626
pgp.decrypt(client["encrypted_secret"],
2627
client_settings[client_name]
2628
["secret"]))
2629
except PGPError:
2630
# If decryption fails, we use secret from new settings
2631
logger.debug("Failed to decrypt {} old secret"
2632
.format(client_name))
2633
client["secret"] = (
2634
client_settings[client_name]["secret"])
2635
2636
# Add/remove clients based on new changes made to config
2637
for client_name in (set(old_client_settings)
2638
- set(client_settings)):
2639
del clients_data[client_name]
2640
for client_name in (set(client_settings)
2641
- set(old_client_settings)):
2642
clients_data[client_name] = client_settings[client_name]
2643
2644
# Create all client objects
2645
for client_name, client in clients_data.items():
2646
tcp_server.clients[client_name] = client_class(
2647
name = client_name, settings = client,
2648
server_settings = server_settings)
2649
1923
yield (name, special_settings[name]())
1924
except KeyError:
1925
yield (name, value)
1926
1927
tcp_server.clients.update(set(
1928
client_class(name = section,
1929
config= dict(client_config_items(
1930
client_config, section)))
1931
for section in client_config.sections()))
2650
1932
if not tcp_server.clients:
2651
1933
logger.warning("No clients defined")
2652
2653
if not foreground:
2654
if pidfile is not None:
2655
try:
2656
with pidfile:
2657
pid = os.getpid()
2658
pidfile.write("{}\n".format(pid).encode("utf-8"))
2659
except IOError:
2660
logger.error("Could not write to file %r with PID %d",
2661
pidfilename, pid)
2662
del pidfile
1934
1935
if not debug:
1936
try:
1937
with pidfile:
1938
pid = os.getpid()
1939
pidfile.write(str(pid) + "\n".encode("utf-8"))
1940
del pidfile
1941
except IOError:
1942
logger.error("Could not write to file %r with PID %d",
1943
pidfilename, pid)
1944
except NameError:
1945
# "pidfile" was never created
1946
pass
2663
1947
del pidfilename
2664
1948
1949
signal.signal(signal.SIGINT, signal.SIG_IGN)
1950
2665
1951
signal.signal(signal.SIGHUP, lambda signum, frame: sys.exit())
2666
1952
signal.signal(signal.SIGTERM, lambda signum, frame: sys.exit())
2667
1953
2668
1954
if use_dbus:
2669
@alternate_dbus_interfaces({"se.recompile.Mandos":
2670
"se.bsnet.fukt.Mandos"})
2671
class MandosDBusService(DBusObjectWithProperties):
1955
class MandosDBusService(dbus.service.Object):
2672
1956
"""A D-Bus proxy object"""
2673
1957
def __init__(self):
2674
1958
dbus.service.Object.__init__(self, bus, "/")
2675
_interface = "se.recompile.Mandos"
2676
2677
@dbus_interface_annotations(_interface)
2678
def _foo(self):
2679
return { "org.freedesktop.DBus.Property"
2680
".EmitsChangedSignal":
2681
"false"}
1959
_interface = "se.bsnet.fukt.Mandos"
2682
1960
2683
1961
@dbus.service.signal(_interface, signature="o")
2684
1962
def ClientAdded(self, objpath):
2699
1977
def GetAllClients(self):
2700
1978
"D-Bus method"
2701
1979
return dbus.Array(c.dbus_object_path
2702
for c in
2703
tcp_server.clients.itervalues())
1980
for c in tcp_server.clients)
2704
1981
2705
1982
@dbus.service.method(_interface,
2706
1983
out_signature="a{oa{sv}}")
2708
1985
"D-Bus method"
2709
1986
return dbus.Dictionary(
2710
1987
((c.dbus_object_path, c.GetAll(""))
2711
for c in tcp_server.clients.itervalues()),
1988
for c in tcp_server.clients),
2712
1989
signature="oa{sv}")
2713
1990
2714
1991
@dbus.service.method(_interface, in_signature="o")
2715
1992
def RemoveClient(self, object_path):
2716
1993
"D-Bus method"
2717
for c in tcp_server.clients.itervalues():
1994
for c in tcp_server.clients:
2718
1995
if c.dbus_object_path == object_path:
2719
del tcp_server.clients[c.name]
1996
tcp_server.clients.remove(c)
2720
1997
c.remove_from_connection()
2721
1998
# Don't signal anything except ClientRemoved
2722
1999
c.disable(quiet=True)
2731
2008
2732
2009
def cleanup():
2733
2010
"Cleanup function; run on exit"
2734
if zeroconf:
2735
service.cleanup()
2736
2737
multiprocessing.active_children()
2738
wnull.close()
2739
if not (tcp_server.clients or client_settings):
2740
return
2741
2742
# Store client before exiting. Secrets are encrypted with key
2743
# based on what config file has. If config file is
2744
# removed/edited, old secret will thus be unrecovable.
2745
clients = {}
2746
with PGPEngine() as pgp:
2747
for client in tcp_server.clients.itervalues():
2748
key = client_settings[client.name]["secret"]
2749
client.encrypted_secret = pgp.encrypt(client.secret,
2750
key)
2751
client_dict = {}
2752
2753
# A list of attributes that can not be pickled
2754
# + secret.
2755
exclude = { "bus", "changedstate", "secret",
2756
"checker", "server_settings" }
2757
for name, typ in (inspect.getmembers
2758
(dbus.service.Object)):
2759
exclude.add(name)
2760
2761
client_dict["encrypted_secret"] = (client
2762
.encrypted_secret)
2763
for attr in client.client_structure:
2764
if attr not in exclude:
2765
client_dict[attr] = getattr(client, attr)
2766
2767
clients[client.name] = client_dict
2768
del client_settings[client.name]["secret"]
2769
2770
try:
2771
with (tempfile.NamedTemporaryFile
2772
(mode='wb', suffix=".pickle", prefix='clients-',
2773
dir=os.path.dirname(stored_state_path),
2774
delete=False)) as stored_state:
2775
pickle.dump((clients, client_settings), stored_state)
2776
tempname=stored_state.name
2777
os.rename(tempname, stored_state_path)
2778
except (IOError, OSError) as e:
2779
if not debug:
2780
try:
2781
os.remove(tempname)
2782
except NameError:
2783
pass
2784
if e.errno in (errno.ENOENT, errno.EACCES, errno.EEXIST):
2785
logger.warning("Could not save persistent state: {}"
2786
.format(os.strerror(e.errno)))
2787
else:
2788
logger.warning("Could not save persistent state:",
2789
exc_info=e)
2790
raise
2791
2792
# Delete all clients, and settings from config
2011
service.cleanup()
2012
2793
2013
while tcp_server.clients:
2794
name, client = tcp_server.clients.popitem()
2014
client = tcp_server.clients.pop()
2795
2015
if use_dbus:
2796
2016
client.remove_from_connection()
2017
client.disable_hook = None
2797
2018
# Don't signal anything except ClientRemoved
2798
2019
client.disable(quiet=True)
2799
2020
if use_dbus:
2800
2021
# Emit D-Bus signal
2801
mandos_dbus_service.ClientRemoved(client
2802
.dbus_object_path,
2022
mandos_dbus_service.ClientRemoved(client.dbus_object_path,
2803
2023
client.name)
2804
client_settings.clear()
2805
2024
2806
2025
atexit.register(cleanup)
2807
2026
2808
for client in tcp_server.clients.itervalues():
2027
for client in tcp_server.clients:
2809
2028
if use_dbus:
2810
2029
# Emit D-Bus signal
2811
2030
mandos_dbus_service.ClientAdded(client.dbus_object_path)
2812
# Need to initiate checking of clients
2813
if client.enabled:
2814
client.init_checker()
2031
client.enable()
2815
2032
2816
2033
tcp_server.enable()
2817
2034
tcp_server.server_activate()
2818
2035
2819
2036
# Find out what port we got
2820
if zeroconf:
2821
service.port = tcp_server.socket.getsockname()[1]
2037
service.port = tcp_server.socket.getsockname()[1]
2822
2038
if use_ipv6:
2823
2039
logger.info("Now listening on address %r, port %d,"
2824
" flowinfo %d, scope_id %d",
2825
*tcp_server.socket.getsockname())
2040
" flowinfo %d, scope_id %d"
2041
% tcp_server.socket.getsockname())
2826
2042
else: # IPv4
2827
logger.info("Now listening on address %r, port %d",
2828
*tcp_server.socket.getsockname())
2043
logger.info("Now listening on address %r, port %d"
2044
% tcp_server.socket.getsockname())
2829
2045
2830
2046
#service.interface = tcp_server.socket.getsockname()[3]
2831
2047
2832
2048
try:
2833
if zeroconf:
2834
# From the Avahi example code
2835
try:
2836
service.activate()
2837
except dbus.exceptions.DBusException as error:
2838
logger.critical("D-Bus Exception", exc_info=error)
2839
cleanup()
2840
sys.exit(1)
2841
# End of Avahi example code
2049
# From the Avahi example code
2050
try:
2051
service.activate()
2052
except dbus.exceptions.DBusException as error:
2053
logger.critical("DBusException: %s", error)
2054
cleanup()
2055
sys.exit(1)
2056
# End of Avahi example code
2842
2057
2843
2058
gobject.io_add_watch(tcp_server.fileno(), gobject.IO_IN,
2844
2059
lambda *args, **kwargs:
2848
2063
logger.debug("Starting main loop")
2849
2064
main_loop.run()
2850
2065
except AvahiError as error:
2851
logger.critical("Avahi Error", exc_info=error)
2066
logger.critical("AvahiError: %s", error)
2852
2067
cleanup()
2853
2068
sys.exit(1)
2854
2069
except KeyboardInterrupt:
Loggerhead is a web-based interface for Breezy
Version: 2.0.2.dev0