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- Committer: Teddy Hogeborn
- Date: 2014-02-16 12:54:34 UTC
- mfrom: (655 trunk)
- mto: This revision was merged to the branch mainline in revision 656.
- Revision ID: teddy@recompile.se-20140216125434-zll46tlbgvvl5wda
Merge from trunk.
- files added:
- DBUS-API
- debian/source
- network-hooks.d
- files modified:
- .bzrignore
added
removed
mandos
11
11
# "AvahiService" class, and some lines in "main".
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#
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# Everything else is
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# Copyright © 2008,2009 Teddy Hogeborn
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# Copyright © 2008,2009 Björn Påhlsson
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# Copyright © 2008-2014 Teddy Hogeborn
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# Copyright © 2008-2014 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@fukt.bsnet.se>.
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# Contact the authors at <mandos@recompile.se>.
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#
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from __future__ import division, with_statement, absolute_import
34
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 optparse
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import argparse
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import datetime
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import errno
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import gnutls.crypto
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import logging
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import logging.handlers
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import pwd
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from contextlib import closing
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import contextlib
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import struct
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import fcntl
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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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import dbus
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import dbus.service
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from dbus.mainloop.glib import DBusGMainLoop
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import ctypes
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import ctypes.util
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import xml.dom.minidom
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import inspect
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try:
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SO_BINDTODEVICE = socket.SO_BINDTODEVICE
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except ImportError:
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SO_BINDTODEVICE = None
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90
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version = "1.0.8"
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logger = logging.Logger(u'mandos')
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syslogger = (logging.handlers.SysLogHandler
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(facility = logging.handlers.SysLogHandler.LOG_DAEMON,
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address = "/dev/log"))
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syslogger.setFormatter(logging.Formatter
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(u'Mandos [%(process)d]: %(levelname)s:'
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u' %(message)s'))
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logger.addHandler(syslogger)
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console = logging.StreamHandler()
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console.setFormatter(logging.Formatter(u'%(name)s [%(process)d]:'
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u' %(levelname)s:'
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u' %(message)s'))
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logger.addHandler(console)
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version = "1.6.3"
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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:
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if_nametoindex = (ctypes.cdll.LoadLibrary
99
(ctypes.util.find_library("c"))
100
.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(str("16s16x"),
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interface))
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interface_index = struct.unpack(str("I"),
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ifreq[16:20])[0]
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return interface_index
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def initlogger(debug, level=logging.WARNING):
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"""init logger and add loglevel"""
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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 = str("/dev/log")))
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syslogger.setFormatter(logging.Formatter
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('Mandos [%(process)d]: %(levelname)s:'
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' %(message)s'))
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logger.addHandler(syslogger)
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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"""
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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):
152
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
164
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))
168
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):
175
# Passphrase can not be empty and can not contain newlines or
176
# NUL bytes. So we prefix it and hex encode it.
177
encoded = b"mandos" + binascii.hexlify(password)
178
if len(encoded) > 2048:
179
# GnuPG can't handle long passwords, so encode differently
180
encoded = (b"mandos" + password.replace(b"\\", b"\\\\")
181
.replace(b"\n", b"\\n")
182
.replace(b"\0", b"\\x00"))
183
return encoded
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def encrypt(self, data, password):
186
passphrase = self.password_encode(password)
187
with tempfile.NamedTemporaryFile(dir=self.tempdir
188
) as passfile:
189
passfile.write(passphrase)
190
passfile.flush()
191
proc = subprocess.Popen(['gpg', '--symmetric',
192
'--passphrase-file',
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passfile.name]
194
+ 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)
199
if proc.returncode != 0:
200
raise PGPError(err)
201
return ciphertext
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def decrypt(self, data, password):
204
passphrase = self.password_encode(password)
205
with tempfile.NamedTemporaryFile(dir = self.tempdir
206
) as passfile:
207
passfile.write(passphrase)
208
passfile.flush()
209
proc = subprocess.Popen(['gpg', '--decrypt',
210
'--passphrase-file',
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passfile.name]
212
+ 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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decrypted_plaintext, err = proc.communicate(input
217
= data)
218
if proc.returncode != 0:
219
raise PGPError(err)
220
return decrypted_plaintext
221
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class AvahiError(Exception):
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224
def __init__(self, value, *args, **kwargs):
114
240
Attributes:
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241
interface: integer; avahi.IF_UNSPEC or an interface index.
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242
Used to optionally bind to the specified interface.
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name: string; Example: u'Mandos'
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type: string; Example: u'_mandos._tcp'.
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See <http://www.dns-sd.org/ServiceTypes.html>
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name: string; Example: 'Mandos'
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type: string; Example: '_mandos._tcp'.
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See <https://www.iana.org/assignments/service-names-port-numbers>
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port: integer; what port to announce
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TXT: list of strings; TXT record for the service
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domain: string; Domain to publish on, default to .local if empty.
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server: D-Bus Server
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bus: dbus.SystemBus()
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"""
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def __init__(self, interface = avahi.IF_UNSPEC, name = None,
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servicetype = None, port = None, TXT = None,
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domain = u"", host = u"", max_renames = 32768,
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domain = "", host = "", max_renames = 32768,
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protocol = avahi.PROTO_UNSPEC, bus = None):
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self.interface = interface
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self.name = name
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self.group = None # our entry group
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self.server = None
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self.bus = bus
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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:
151
logger.critical(u"No suitable Zeroconf service name found"
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u" after %i retries, exiting.",
280
logger.critical("No suitable Zeroconf service name found"
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" after %i retries, exiting.",
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self.rename_count)
154
raise AvahiServiceError(u"Too many renames")
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self.name = self.server.GetAlternativeServiceName(self.name)
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logger.info(u"Changing Zeroconf service name to %r ...",
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unicode(self.name))
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syslogger.setFormatter(logging.Formatter
159
(u'Mandos (%s) [%%(process)d]:'
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u' %%(levelname)s: %%(message)s'
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% self.name))
283
raise AvahiServiceError("Too many renames")
284
self.name = unicode(self.server
285
.GetAlternativeServiceName(self.name))
286
logger.info("Changing Zeroconf service name to %r ...",
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self.name)
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self.remove()
163
self.add()
289
try:
290
self.add()
291
except dbus.exceptions.DBusException as error:
292
logger.critical("D-Bus Exception", exc_info=error)
293
self.cleanup()
294
os._exit(1)
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self.rename_count += 1
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def remove(self):
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"""Derived from the Avahi example code"""
299
if self.entry_group_state_changed_match is not None:
300
self.entry_group_state_changed_match.remove()
301
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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"""Derived from the Avahi example code"""
307
self.remove()
171
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if self.group is None:
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self.group = dbus.Interface(
173
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self.bus.get_object(avahi.DBUS_NAME,
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311
self.server.EntryGroupNew()),
175
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avahi.DBUS_INTERFACE_ENTRY_GROUP)
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self.group.connect_to_signal('StateChanged',
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self.entry_group_state_changed)
178
logger.debug(u"Adding Zeroconf service '%s' of type '%s' ...",
313
self.entry_group_state_changed_match = (
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self.group.connect_to_signal(
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'StateChanged', self.entry_group_state_changed))
316
logger.debug("Adding Zeroconf service '%s' of type '%s' ...",
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317
self.name, self.type)
180
318
self.group.AddService(
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self.interface,
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dbus.UInt16(self.port),
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avahi.string_array_to_txt_array(self.TXT))
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self.group.Commit()
327
189
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def entry_group_state_changed(self, state, error):
190
329
"""Derived from the Avahi example code"""
191
logger.debug(u"Avahi state change: %i", state)
330
logger.debug("Avahi entry group state change: %i", state)
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331
193
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if state == avahi.ENTRY_GROUP_ESTABLISHED:
194
logger.debug(u"Zeroconf service established.")
333
logger.debug("Zeroconf service established.")
195
334
elif state == avahi.ENTRY_GROUP_COLLISION:
196
logger.warning(u"Zeroconf service name collision.")
335
logger.info("Zeroconf service name collision.")
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336
self.rename()
198
337
elif state == avahi.ENTRY_GROUP_FAILURE:
199
logger.critical(u"Avahi: Error in group state changed %s",
338
logger.critical("Avahi: Error in group state changed %s",
200
339
unicode(error))
201
raise AvahiGroupError(u"State changed: %s"
202
% unicode(error))
340
raise AvahiGroupError("State changed: {0!s}"
341
.format(error))
342
203
343
def cleanup(self):
204
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"""Derived from the Avahi example code"""
205
345
if self.group is not None:
206
self.group.Free()
346
try:
347
self.group.Free()
348
except (dbus.exceptions.UnknownMethodException,
349
dbus.exceptions.DBusException):
350
pass
207
351
self.group = None
208
def server_state_changed(self, state):
352
self.remove()
353
354
def server_state_changed(self, state, error=None):
209
355
"""Derived from the Avahi example code"""
210
if state == avahi.SERVER_COLLISION:
211
logger.error(u"Zeroconf server name collision")
212
self.remove()
356
logger.debug("Avahi server state change: %i", state)
357
bad_states = { avahi.SERVER_INVALID:
358
"Zeroconf server invalid",
359
avahi.SERVER_REGISTERING: None,
360
avahi.SERVER_COLLISION:
361
"Zeroconf server name collision",
362
avahi.SERVER_FAILURE:
363
"Zeroconf server failure" }
364
if state in bad_states:
365
if bad_states[state] is not None:
366
if error is None:
367
logger.error(bad_states[state])
368
else:
369
logger.error(bad_states[state] + ": %r", error)
370
self.cleanup()
213
371
elif state == avahi.SERVER_RUNNING:
214
372
self.add()
373
else:
374
if error is None:
375
logger.debug("Unknown state: %r", state)
376
else:
377
logger.debug("Unknown state: %r: %r", state, error)
378
215
379
def activate(self):
216
380
"""Derived from the Avahi example code"""
217
381
if self.server is None:
218
382
self.server = dbus.Interface(
219
383
self.bus.get_object(avahi.DBUS_NAME,
220
avahi.DBUS_PATH_SERVER),
384
avahi.DBUS_PATH_SERVER,
385
follow_name_owner_changes=True),
221
386
avahi.DBUS_INTERFACE_SERVER)
222
self.server.connect_to_signal(u"StateChanged",
387
self.server.connect_to_signal("StateChanged",
223
388
self.server_state_changed)
224
389
self.server_state_changed(self.server.GetState())
225
390
226
391
392
class AvahiServiceToSyslog(AvahiService):
393
def rename(self):
394
"""Add the new name to the syslog messages"""
395
ret = AvahiService.rename(self)
396
syslogger.setFormatter(logging.Formatter
397
('Mandos ({0}) [%(process)d]:'
398
' %(levelname)s: %(message)s'
399
.format(self.name)))
400
return ret
401
402
403
def timedelta_to_milliseconds(td):
404
"Convert a datetime.timedelta() to milliseconds"
405
return ((td.days * 24 * 60 * 60 * 1000)
406
+ (td.seconds * 1000)
407
+ (td.microseconds // 1000))
408
409
227
410
class Client(object):
228
411
"""A representation of a client host served by this server.
229
412
230
413
Attributes:
231
name: string; from the config file, used in log messages and
232
D-Bus identifiers
233
fingerprint: string (40 or 32 hexadecimal digits); used to
234
uniquely identify the client
235
secret: bytestring; sent verbatim (over TLS) to client
236
host: string; available for use by the checker command
237
created: datetime.datetime(); (UTC) object creation
238
last_enabled: datetime.datetime(); (UTC)
239
enabled: bool()
240
last_checked_ok: datetime.datetime(); (UTC) or None
241
timeout: datetime.timedelta(); How long from last_checked_ok
242
until this client is invalid
243
interval: datetime.timedelta(); How often to start a new checker
244
disable_hook: If set, called by disable() as disable_hook(self)
414
approved: bool(); 'None' if not yet approved/disapproved
415
approval_delay: datetime.timedelta(); Time to wait for approval
416
approval_duration: datetime.timedelta(); Duration of one approval
245
417
checker: subprocess.Popen(); a running checker process used
246
418
to see if the client lives.
247
419
'None' if no process is running.
248
checker_initiator_tag: a gobject event source tag, or None
249
disable_initiator_tag: - '' -
250
checker_callback_tag: - '' -
251
checker_command: string; External command which is run to check if
252
client lives. %() expansions are done at
420
checker_callback_tag: a gobject event source tag, or None
421
checker_command: string; External command which is run to check
422
if client lives. %() expansions are done at
253
423
runtime with vars(self) as dict, so that for
254
424
instance %(name)s can be used in the command.
425
checker_initiator_tag: a gobject event source tag, or None
426
created: datetime.datetime(); (UTC) object creation
427
client_structure: Object describing what attributes a client has
428
and is used for storing the client at exit
255
429
current_checker_command: string; current running checker_command
430
disable_initiator_tag: a gobject event source tag, or None
431
enabled: bool()
432
fingerprint: string (40 or 32 hexadecimal digits); used to
433
uniquely identify the client
434
host: string; available for use by the checker command
435
interval: datetime.timedelta(); How often to start a new checker
436
last_approval_request: datetime.datetime(); (UTC) or None
437
last_checked_ok: datetime.datetime(); (UTC) or None
438
last_checker_status: integer between 0 and 255 reflecting exit
439
status of last checker. -1 reflects crashed
440
checker, -2 means no checker completed yet.
441
last_enabled: datetime.datetime(); (UTC) or None
442
name: string; from the config file, used in log messages and
443
D-Bus identifiers
444
secret: bytestring; sent verbatim (over TLS) to client
445
timeout: datetime.timedelta(); How long from last_checked_ok
446
until this client is disabled
447
extended_timeout: extra long timeout when secret has been sent
448
runtime_expansions: Allowed attributes for runtime expansion.
449
expires: datetime.datetime(); time (UTC) when a client will be
450
disabled, or None
451
server_settings: The server_settings dict from main()
256
452
"""
257
453
258
@staticmethod
259
def _datetime_to_milliseconds(dt):
260
"Convert a datetime.datetime() to milliseconds"
261
return ((dt.days * 24 * 60 * 60 * 1000)
262
+ (dt.seconds * 1000)
263
+ (dt.microseconds // 1000))
454
runtime_expansions = ("approval_delay", "approval_duration",
455
"created", "enabled", "expires",
456
"fingerprint", "host", "interval",
457
"last_approval_request", "last_checked_ok",
458
"last_enabled", "name", "timeout")
459
client_defaults = { "timeout": "PT5M",
460
"extended_timeout": "PT15M",
461
"interval": "PT2M",
462
"checker": "fping -q -- %%(host)s",
463
"host": "",
464
"approval_delay": "PT0S",
465
"approval_duration": "PT1S",
466
"approved_by_default": "True",
467
"enabled": "True",
468
}
264
469
265
470
def timeout_milliseconds(self):
266
471
"Return the 'timeout' attribute in milliseconds"
267
return self._datetime_to_milliseconds(self.timeout)
472
return timedelta_to_milliseconds(self.timeout)
473
474
def extended_timeout_milliseconds(self):
475
"Return the 'extended_timeout' attribute in milliseconds"
476
return timedelta_to_milliseconds(self.extended_timeout)
268
477
269
478
def interval_milliseconds(self):
270
479
"Return the 'interval' attribute in milliseconds"
271
return self._datetime_to_milliseconds(self.interval)
272
273
def __init__(self, name = None, disable_hook=None, config=None):
274
"""Note: the 'checker' key in 'config' sets the
275
'checker_command' attribute and *not* the 'checker'
276
attribute."""
480
return timedelta_to_milliseconds(self.interval)
481
482
def approval_delay_milliseconds(self):
483
return timedelta_to_milliseconds(self.approval_delay)
484
485
@staticmethod
486
def config_parser(config):
487
"""Construct a new dict of client settings of this form:
488
{ client_name: {setting_name: value, ...}, ...}
489
with exceptions for any special settings as defined above.
490
NOTE: Must be a pure function. Must return the same result
491
value given the same arguments.
492
"""
493
settings = {}
494
for client_name in config.sections():
495
section = dict(config.items(client_name))
496
client = settings[client_name] = {}
497
498
client["host"] = section["host"]
499
# Reformat values from string types to Python types
500
client["approved_by_default"] = config.getboolean(
501
client_name, "approved_by_default")
502
client["enabled"] = config.getboolean(client_name,
503
"enabled")
504
505
client["fingerprint"] = (section["fingerprint"].upper()
506
.replace(" ", ""))
507
if "secret" in section:
508
client["secret"] = section["secret"].decode("base64")
509
elif "secfile" in section:
510
with open(os.path.expanduser(os.path.expandvars
511
(section["secfile"])),
512
"rb") as secfile:
513
client["secret"] = secfile.read()
514
else:
515
raise TypeError("No secret or secfile for section {0}"
516
.format(section))
517
client["timeout"] = string_to_delta(section["timeout"])
518
client["extended_timeout"] = string_to_delta(
519
section["extended_timeout"])
520
client["interval"] = string_to_delta(section["interval"])
521
client["approval_delay"] = string_to_delta(
522
section["approval_delay"])
523
client["approval_duration"] = string_to_delta(
524
section["approval_duration"])
525
client["checker_command"] = section["checker"]
526
client["last_approval_request"] = None
527
client["last_checked_ok"] = None
528
client["last_checker_status"] = -2
529
530
return settings
531
532
def __init__(self, settings, name = None, server_settings=None):
277
533
self.name = name
278
if config is None:
279
config = {}
280
logger.debug(u"Creating client %r", self.name)
534
if server_settings is None:
535
server_settings = {}
536
self.server_settings = server_settings
537
# adding all client settings
538
for setting, value in settings.iteritems():
539
setattr(self, setting, value)
540
541
if self.enabled:
542
if not hasattr(self, "last_enabled"):
543
self.last_enabled = datetime.datetime.utcnow()
544
if not hasattr(self, "expires"):
545
self.expires = (datetime.datetime.utcnow()
546
+ self.timeout)
547
else:
548
self.last_enabled = None
549
self.expires = None
550
551
logger.debug("Creating client %r", self.name)
281
552
# Uppercase and remove spaces from fingerprint for later
282
553
# comparison purposes with return value from the fingerprint()
283
554
# function
284
self.fingerprint = (config[u"fingerprint"].upper()
285
.replace(u" ", u""))
286
logger.debug(u" Fingerprint: %s", self.fingerprint)
287
if u"secret" in config:
288
self.secret = config[u"secret"].decode(u"base64")
289
elif u"secfile" in config:
290
with closing(open(os.path.expanduser
291
(os.path.expandvars
292
(config[u"secfile"])))) as secfile:
293
self.secret = secfile.read()
294
else:
295
raise TypeError(u"No secret or secfile for client %s"
296
% self.name)
297
self.host = config.get(u"host", u"")
298
self.created = datetime.datetime.utcnow()
299
self.enabled = False
300
self.last_enabled = None
301
self.last_checked_ok = None
302
self.timeout = string_to_delta(config[u"timeout"])
303
self.interval = string_to_delta(config[u"interval"])
304
self.disable_hook = disable_hook
555
logger.debug(" Fingerprint: %s", self.fingerprint)
556
self.created = settings.get("created",
557
datetime.datetime.utcnow())
558
559
# attributes specific for this server instance
305
560
self.checker = None
306
561
self.checker_initiator_tag = None
307
562
self.disable_initiator_tag = None
308
563
self.checker_callback_tag = None
309
self.checker_command = config[u"checker"]
310
564
self.current_checker_command = None
311
self.last_connect = None
565
self.approved = None
566
self.approvals_pending = 0
567
self.changedstate = (multiprocessing_manager
568
.Condition(multiprocessing_manager
569
.Lock()))
570
self.client_structure = [attr for attr in
571
self.__dict__.iterkeys()
572
if not attr.startswith("_")]
573
self.client_structure.append("client_structure")
574
575
for name, t in inspect.getmembers(type(self),
576
lambda obj:
577
isinstance(obj,
578
property)):
579
if not name.startswith("_"):
580
self.client_structure.append(name)
581
582
# Send notice to process children that client state has changed
583
def send_changedstate(self):
584
with self.changedstate:
585
self.changedstate.notify_all()
312
586
313
587
def enable(self):
314
588
"""Start this client's checker and timeout hooks"""
589
if getattr(self, "enabled", False):
590
# Already enabled
591
return
592
self.expires = datetime.datetime.utcnow() + self.timeout
593
self.enabled = True
315
594
self.last_enabled = datetime.datetime.utcnow()
595
self.init_checker()
596
self.send_changedstate()
597
598
def disable(self, quiet=True):
599
"""Disable this client."""
600
if not getattr(self, "enabled", False):
601
return False
602
if not quiet:
603
logger.info("Disabling client %s", self.name)
604
if getattr(self, "disable_initiator_tag", None) is not None:
605
gobject.source_remove(self.disable_initiator_tag)
606
self.disable_initiator_tag = None
607
self.expires = None
608
if getattr(self, "checker_initiator_tag", None) is not None:
609
gobject.source_remove(self.checker_initiator_tag)
610
self.checker_initiator_tag = None
611
self.stop_checker()
612
self.enabled = False
613
if not quiet:
614
self.send_changedstate()
615
# Do not run this again if called by a gobject.timeout_add
616
return False
617
618
def __del__(self):
619
self.disable()
620
621
def init_checker(self):
316
622
# Schedule a new checker to be started an 'interval' from now,
317
623
# and every interval from then on.
624
if self.checker_initiator_tag is not None:
625
gobject.source_remove(self.checker_initiator_tag)
318
626
self.checker_initiator_tag = (gobject.timeout_add
319
627
(self.interval_milliseconds(),
320
628
self.start_checker))
321
# Also start a new checker *right now*.
322
self.start_checker()
323
629
# Schedule a disable() when 'timeout' has passed
630
if self.disable_initiator_tag is not None:
631
gobject.source_remove(self.disable_initiator_tag)
324
632
self.disable_initiator_tag = (gobject.timeout_add
325
633
(self.timeout_milliseconds(),
326
634
self.disable))
327
self.enabled = True
328
329
def disable(self):
330
"""Disable this client."""
331
if not getattr(self, "enabled", False):
332
return False
333
logger.info(u"Disabling client %s", self.name)
334
if getattr(self, u"disable_initiator_tag", False):
335
gobject.source_remove(self.disable_initiator_tag)
336
self.disable_initiator_tag = None
337
if getattr(self, u"checker_initiator_tag", False):
338
gobject.source_remove(self.checker_initiator_tag)
339
self.checker_initiator_tag = None
340
self.stop_checker()
341
if self.disable_hook:
342
self.disable_hook(self)
343
self.enabled = False
344
# Do not run this again if called by a gobject.timeout_add
345
return False
346
347
def __del__(self):
348
self.disable_hook = None
349
self.disable()
635
# Also start a new checker *right now*.
636
self.start_checker()
350
637
351
638
def checker_callback(self, pid, condition, command):
352
639
"""The checker has completed, so take appropriate actions."""
353
640
self.checker_callback_tag = None
354
641
self.checker = None
355
642
if os.WIFEXITED(condition):
356
exitstatus = os.WEXITSTATUS(condition)
357
if exitstatus == 0:
358
logger.info(u"Checker for %(name)s succeeded",
643
self.last_checker_status = os.WEXITSTATUS(condition)
644
if self.last_checker_status == 0:
645
logger.info("Checker for %(name)s succeeded",
359
646
vars(self))
360
647
self.checked_ok()
361
648
else:
362
logger.info(u"Checker for %(name)s failed",
649
logger.info("Checker for %(name)s failed",
363
650
vars(self))
364
651
else:
365
logger.warning(u"Checker for %(name)s crashed?",
652
self.last_checker_status = -1
653
logger.warning("Checker for %(name)s crashed?",
366
654
vars(self))
367
655
368
656
def checked_ok(self):
369
"""Bump up the timeout for this client.
370
371
This should only be called when the client has been seen,
372
alive and well.
373
"""
657
"""Assert that the client has been seen, alive and well."""
374
658
self.last_checked_ok = datetime.datetime.utcnow()
375
gobject.source_remove(self.disable_initiator_tag)
376
self.disable_initiator_tag = (gobject.timeout_add
377
(self.timeout_milliseconds(),
378
self.disable))
659
self.last_checker_status = 0
660
self.bump_timeout()
661
662
def bump_timeout(self, timeout=None):
663
"""Bump up the timeout for this client."""
664
if timeout is None:
665
timeout = self.timeout
666
if self.disable_initiator_tag is not None:
667
gobject.source_remove(self.disable_initiator_tag)
668
self.disable_initiator_tag = None
669
if getattr(self, "enabled", False):
670
self.disable_initiator_tag = (gobject.timeout_add
671
(timedelta_to_milliseconds
672
(timeout), self.disable))
673
self.expires = datetime.datetime.utcnow() + timeout
674
675
def need_approval(self):
676
self.last_approval_request = datetime.datetime.utcnow()
379
677
380
678
def start_checker(self):
381
679
"""Start a new checker subprocess if one is not running.
383
681
If a checker already exists, leave it running and do
384
682
nothing."""
385
683
# The reason for not killing a running checker is that if we
386
# did that, then if a checker (for some reason) started
387
# running slowly and taking more than 'interval' time, the
388
# client would inevitably timeout, since no checker would get
389
# a chance to run to completion. If we instead leave running
684
# did that, and if a checker (for some reason) started running
685
# slowly and taking more than 'interval' time, then the client
686
# would inevitably timeout, since no checker would get a
687
# chance to run to completion. If we instead leave running
390
688
# checkers alone, the checker would have to take more time
391
# than 'timeout' for the client to be declared invalid, which
392
# is as it should be.
689
# than 'timeout' for the client to be disabled, which is as it
690
# should be.
393
691
394
692
# If a checker exists, make sure it is not a zombie
395
if self.checker is not None:
693
try:
396
694
pid, status = os.waitpid(self.checker.pid, os.WNOHANG)
695
except AttributeError:
696
pass
697
except OSError as error:
698
if error.errno != errno.ECHILD:
699
raise
700
else:
397
701
if pid:
398
logger.warning(u"Checker was a zombie")
702
logger.warning("Checker was a zombie")
399
703
gobject.source_remove(self.checker_callback_tag)
400
704
self.checker_callback(pid, status,
401
705
self.current_checker_command)
402
706
# Start a new checker if needed
403
707
if self.checker is None:
708
# Escape attributes for the shell
709
escaped_attrs = dict(
710
(attr, re.escape(unicode(getattr(self, attr))))
711
for attr in
712
self.runtime_expansions)
404
713
try:
405
# In case checker_command has exactly one % operator
406
command = self.checker_command % self.host
407
except TypeError:
408
# Escape attributes for the shell
409
escaped_attrs = dict((key,
410
re.escape(unicode(str(val),
411
errors=
412
u'replace')))
413
for key, val in
414
vars(self).iteritems())
415
try:
416
command = self.checker_command % escaped_attrs
417
except TypeError, error:
418
logger.error(u'Could not format string "%s":'
419
u' %s', self.checker_command, error)
420
return True # Try again later
714
command = self.checker_command % escaped_attrs
715
except TypeError as error:
716
logger.error('Could not format string "%s"',
717
self.checker_command, exc_info=error)
718
return True # Try again later
421
719
self.current_checker_command = command
422
720
try:
423
logger.info(u"Starting checker %r for %s",
721
logger.info("Starting checker %r for %s",
424
722
command, self.name)
425
723
# We don't need to redirect stdout and stderr, since
426
724
# in normal mode, that is already done by daemon(),
427
725
# and in debug mode we don't want to. (Stdin is
428
726
# always replaced by /dev/null.)
727
# The exception is when not debugging but nevertheless
728
# running in the foreground; use the previously
729
# created wnull.
730
popen_args = {}
731
if (not self.server_settings["debug"]
732
and self.server_settings["foreground"]):
733
popen_args.update({"stdout": wnull,
734
"stderr": wnull })
429
735
self.checker = subprocess.Popen(command,
430
736
close_fds=True,
431
shell=True, cwd=u"/")
432
self.checker_callback_tag = (gobject.child_watch_add
433
(self.checker.pid,
434
self.checker_callback,
435
data=command))
436
# The checker may have completed before the gobject
437
# watch was added. Check for this.
737
shell=True, cwd="/",
738
**popen_args)
739
except OSError as error:
740
logger.error("Failed to start subprocess",
741
exc_info=error)
742
return True
743
self.checker_callback_tag = (gobject.child_watch_add
744
(self.checker.pid,
745
self.checker_callback,
746
data=command))
747
# The checker may have completed before the gobject
748
# watch was added. Check for this.
749
try:
438
750
pid, status = os.waitpid(self.checker.pid, os.WNOHANG)
439
if pid:
440
gobject.source_remove(self.checker_callback_tag)
441
self.checker_callback(pid, status, command)
442
except OSError, error:
443
logger.error(u"Failed to start subprocess: %s",
444
error)
751
except OSError as error:
752
if error.errno == errno.ECHILD:
753
# This should never happen
754
logger.error("Child process vanished",
755
exc_info=error)
756
return True
757
raise
758
if pid:
759
gobject.source_remove(self.checker_callback_tag)
760
self.checker_callback(pid, status, command)
445
761
# Re-run this periodically if run by gobject.timeout_add
446
762
return True
447
763
450
766
if self.checker_callback_tag:
451
767
gobject.source_remove(self.checker_callback_tag)
452
768
self.checker_callback_tag = None
453
if getattr(self, u"checker", None) is None:
769
if getattr(self, "checker", None) is None:
454
770
return
455
logger.debug(u"Stopping checker for %(name)s", vars(self))
771
logger.debug("Stopping checker for %(name)s", vars(self))
456
772
try:
457
os.kill(self.checker.pid, signal.SIGTERM)
458
#os.sleep(0.5)
773
self.checker.terminate()
774
#time.sleep(0.5)
459
775
#if self.checker.poll() is None:
460
# os.kill(self.checker.pid, signal.SIGKILL)
461
except OSError, error:
776
# self.checker.kill()
777
except OSError as error:
462
778
if error.errno != errno.ESRCH: # No such process
463
779
raise
464
780
self.checker = None
465
466
def still_valid(self):
467
"""Has the timeout not yet passed for this client?"""
468
if not getattr(self, u"enabled", False):
469
return False
470
now = datetime.datetime.utcnow()
471
if self.last_checked_ok is None:
472
return now < (self.created + self.timeout)
473
else:
474
return now < (self.last_checked_ok + self.timeout)
475
476
477
class ClientDBus(Client, dbus.service.Object):
781
782
783
def dbus_service_property(dbus_interface, signature="v",
784
access="readwrite", byte_arrays=False):
785
"""Decorators for marking methods of a DBusObjectWithProperties to
786
become properties on the D-Bus.
787
788
The decorated method will be called with no arguments by "Get"
789
and with one argument by "Set".
790
791
The parameters, where they are supported, are the same as
792
dbus.service.method, except there is only "signature", since the
793
type from Get() and the type sent to Set() is the same.
794
"""
795
# Encoding deeply encoded byte arrays is not supported yet by the
796
# "Set" method, so we fail early here:
797
if byte_arrays and signature != "ay":
798
raise ValueError("Byte arrays not supported for non-'ay'"
799
" signature {0!r}".format(signature))
800
def decorator(func):
801
func._dbus_is_property = True
802
func._dbus_interface = dbus_interface
803
func._dbus_signature = signature
804
func._dbus_access = access
805
func._dbus_name = func.__name__
806
if func._dbus_name.endswith("_dbus_property"):
807
func._dbus_name = func._dbus_name[:-14]
808
func._dbus_get_args_options = {'byte_arrays': byte_arrays }
809
return func
810
return decorator
811
812
813
def dbus_interface_annotations(dbus_interface):
814
"""Decorator for marking functions returning interface annotations
815
816
Usage:
817
818
@dbus_interface_annotations("org.example.Interface")
819
def _foo(self): # Function name does not matter
820
return {"org.freedesktop.DBus.Deprecated": "true",
821
"org.freedesktop.DBus.Property.EmitsChangedSignal":
822
"false"}
823
"""
824
def decorator(func):
825
func._dbus_is_interface = True
826
func._dbus_interface = dbus_interface
827
func._dbus_name = dbus_interface
828
return func
829
return decorator
830
831
832
def dbus_annotations(annotations):
833
"""Decorator to annotate D-Bus methods, signals or properties
834
Usage:
835
836
@dbus_service_property("org.example.Interface", signature="b",
837
access="r")
838
@dbus_annotations({{"org.freedesktop.DBus.Deprecated": "true",
839
"org.freedesktop.DBus.Property."
840
"EmitsChangedSignal": "false"})
841
def Property_dbus_property(self):
842
return dbus.Boolean(False)
843
"""
844
def decorator(func):
845
func._dbus_annotations = annotations
846
return func
847
return decorator
848
849
850
class DBusPropertyException(dbus.exceptions.DBusException):
851
"""A base class for D-Bus property-related exceptions
852
"""
853
def __unicode__(self):
854
return unicode(str(self))
855
856
857
class DBusPropertyAccessException(DBusPropertyException):
858
"""A property's access permissions disallows an operation.
859
"""
860
pass
861
862
863
class DBusPropertyNotFound(DBusPropertyException):
864
"""An attempt was made to access a non-existing property.
865
"""
866
pass
867
868
869
class DBusObjectWithProperties(dbus.service.Object):
870
"""A D-Bus object with properties.
871
872
Classes inheriting from this can use the dbus_service_property
873
decorator to expose methods as D-Bus properties. It exposes the
874
standard Get(), Set(), and GetAll() methods on the D-Bus.
875
"""
876
877
@staticmethod
878
def _is_dbus_thing(thing):
879
"""Returns a function testing if an attribute is a D-Bus thing
880
881
If called like _is_dbus_thing("method") it returns a function
882
suitable for use as predicate to inspect.getmembers().
883
"""
884
return lambda obj: getattr(obj, "_dbus_is_{0}".format(thing),
885
False)
886
887
def _get_all_dbus_things(self, thing):
888
"""Returns a generator of (name, attribute) pairs
889
"""
890
return ((getattr(athing.__get__(self), "_dbus_name",
891
name),
892
athing.__get__(self))
893
for cls in self.__class__.__mro__
894
for name, athing in
895
inspect.getmembers(cls,
896
self._is_dbus_thing(thing)))
897
898
def _get_dbus_property(self, interface_name, property_name):
899
"""Returns a bound method if one exists which is a D-Bus
900
property with the specified name and interface.
901
"""
902
for cls in self.__class__.__mro__:
903
for name, value in (inspect.getmembers
904
(cls,
905
self._is_dbus_thing("property"))):
906
if (value._dbus_name == property_name
907
and value._dbus_interface == interface_name):
908
return value.__get__(self)
909
910
# No such property
911
raise DBusPropertyNotFound(self.dbus_object_path + ":"
912
+ interface_name + "."
913
+ property_name)
914
915
@dbus.service.method(dbus.PROPERTIES_IFACE, in_signature="ss",
916
out_signature="v")
917
def Get(self, interface_name, property_name):
918
"""Standard D-Bus property Get() method, see D-Bus standard.
919
"""
920
prop = self._get_dbus_property(interface_name, property_name)
921
if prop._dbus_access == "write":
922
raise DBusPropertyAccessException(property_name)
923
value = prop()
924
if not hasattr(value, "variant_level"):
925
return value
926
return type(value)(value, variant_level=value.variant_level+1)
927
928
@dbus.service.method(dbus.PROPERTIES_IFACE, in_signature="ssv")
929
def Set(self, interface_name, property_name, value):
930
"""Standard D-Bus property Set() method, see D-Bus standard.
931
"""
932
prop = self._get_dbus_property(interface_name, property_name)
933
if prop._dbus_access == "read":
934
raise DBusPropertyAccessException(property_name)
935
if prop._dbus_get_args_options["byte_arrays"]:
936
# The byte_arrays option is not supported yet on
937
# signatures other than "ay".
938
if prop._dbus_signature != "ay":
939
raise ValueError("Byte arrays not supported for non-"
940
"'ay' signature {0!r}"
941
.format(prop._dbus_signature))
942
value = dbus.ByteArray(b''.join(chr(byte)
943
for byte in value))
944
prop(value)
945
946
@dbus.service.method(dbus.PROPERTIES_IFACE, in_signature="s",
947
out_signature="a{sv}")
948
def GetAll(self, interface_name):
949
"""Standard D-Bus property GetAll() method, see D-Bus
950
standard.
951
952
Note: Will not include properties with access="write".
953
"""
954
properties = {}
955
for name, prop in self._get_all_dbus_things("property"):
956
if (interface_name
957
and interface_name != prop._dbus_interface):
958
# Interface non-empty but did not match
959
continue
960
# Ignore write-only properties
961
if prop._dbus_access == "write":
962
continue
963
value = prop()
964
if not hasattr(value, "variant_level"):
965
properties[name] = value
966
continue
967
properties[name] = type(value)(value, variant_level=
968
value.variant_level+1)
969
return dbus.Dictionary(properties, signature="sv")
970
971
@dbus.service.method(dbus.INTROSPECTABLE_IFACE,
972
out_signature="s",
973
path_keyword='object_path',
974
connection_keyword='connection')
975
def Introspect(self, object_path, connection):
976
"""Overloading of standard D-Bus method.
977
978
Inserts property tags and interface annotation tags.
979
"""
980
xmlstring = dbus.service.Object.Introspect(self, object_path,
981
connection)
982
try:
983
document = xml.dom.minidom.parseString(xmlstring)
984
def make_tag(document, name, prop):
985
e = document.createElement("property")
986
e.setAttribute("name", name)
987
e.setAttribute("type", prop._dbus_signature)
988
e.setAttribute("access", prop._dbus_access)
989
return e
990
for if_tag in document.getElementsByTagName("interface"):
991
# Add property tags
992
for tag in (make_tag(document, name, prop)
993
for name, prop
994
in self._get_all_dbus_things("property")
995
if prop._dbus_interface
996
== if_tag.getAttribute("name")):
997
if_tag.appendChild(tag)
998
# Add annotation tags
999
for typ in ("method", "signal", "property"):
1000
for tag in if_tag.getElementsByTagName(typ):
1001
annots = dict()
1002
for name, prop in (self.
1003
_get_all_dbus_things(typ)):
1004
if (name == tag.getAttribute("name")
1005
and prop._dbus_interface
1006
== if_tag.getAttribute("name")):
1007
annots.update(getattr
1008
(prop,
1009
"_dbus_annotations",
1010
{}))
1011
for name, value in annots.iteritems():
1012
ann_tag = document.createElement(
1013
"annotation")
1014
ann_tag.setAttribute("name", name)
1015
ann_tag.setAttribute("value", value)
1016
tag.appendChild(ann_tag)
1017
# Add interface annotation tags
1018
for annotation, value in dict(
1019
itertools.chain.from_iterable(
1020
annotations().iteritems()
1021
for name, annotations in
1022
self._get_all_dbus_things("interface")
1023
if name == if_tag.getAttribute("name")
1024
)).iteritems():
1025
ann_tag = document.createElement("annotation")
1026
ann_tag.setAttribute("name", annotation)
1027
ann_tag.setAttribute("value", value)
1028
if_tag.appendChild(ann_tag)
1029
# Add the names to the return values for the
1030
# "org.freedesktop.DBus.Properties" methods
1031
if (if_tag.getAttribute("name")
1032
== "org.freedesktop.DBus.Properties"):
1033
for cn in if_tag.getElementsByTagName("method"):
1034
if cn.getAttribute("name") == "Get":
1035
for arg in cn.getElementsByTagName("arg"):
1036
if (arg.getAttribute("direction")
1037
== "out"):
1038
arg.setAttribute("name", "value")
1039
elif cn.getAttribute("name") == "GetAll":
1040
for arg in cn.getElementsByTagName("arg"):
1041
if (arg.getAttribute("direction")
1042
== "out"):
1043
arg.setAttribute("name", "props")
1044
xmlstring = document.toxml("utf-8")
1045
document.unlink()
1046
except (AttributeError, xml.dom.DOMException,
1047
xml.parsers.expat.ExpatError) as error:
1048
logger.error("Failed to override Introspection method",
1049
exc_info=error)
1050
return xmlstring
1051
1052
1053
def datetime_to_dbus(dt, variant_level=0):
1054
"""Convert a UTC datetime.datetime() to a D-Bus type."""
1055
if dt is None:
1056
return dbus.String("", variant_level = variant_level)
1057
return dbus.String(dt.isoformat(),
1058
variant_level=variant_level)
1059
1060
1061
def alternate_dbus_interfaces(alt_interface_names, deprecate=True):
1062
"""A class decorator; applied to a subclass of
1063
dbus.service.Object, it will add alternate D-Bus attributes with
1064
interface names according to the "alt_interface_names" mapping.
1065
Usage:
1066
1067
@alternate_dbus_interfaces({"org.example.Interface":
1068
"net.example.AlternateInterface"})
1069
class SampleDBusObject(dbus.service.Object):
1070
@dbus.service.method("org.example.Interface")
1071
def SampleDBusMethod():
1072
pass
1073
1074
The above "SampleDBusMethod" on "SampleDBusObject" will be
1075
reachable via two interfaces: "org.example.Interface" and
1076
"net.example.AlternateInterface", the latter of which will have
1077
its D-Bus annotation "org.freedesktop.DBus.Deprecated" set to
1078
"true", unless "deprecate" is passed with a False value.
1079
1080
This works for methods and signals, and also for D-Bus properties
1081
(from DBusObjectWithProperties) and interfaces (from the
1082
dbus_interface_annotations decorator).
1083
"""
1084
def wrapper(cls):
1085
for orig_interface_name, alt_interface_name in (
1086
alt_interface_names.iteritems()):
1087
attr = {}
1088
interface_names = set()
1089
# Go though all attributes of the class
1090
for attrname, attribute in inspect.getmembers(cls):
1091
# Ignore non-D-Bus attributes, and D-Bus attributes
1092
# with the wrong interface name
1093
if (not hasattr(attribute, "_dbus_interface")
1094
or not attribute._dbus_interface
1095
.startswith(orig_interface_name)):
1096
continue
1097
# Create an alternate D-Bus interface name based on
1098
# the current name
1099
alt_interface = (attribute._dbus_interface
1100
.replace(orig_interface_name,
1101
alt_interface_name))
1102
interface_names.add(alt_interface)
1103
# Is this a D-Bus signal?
1104
if getattr(attribute, "_dbus_is_signal", False):
1105
# Extract the original non-method undecorated
1106
# function by black magic
1107
nonmethod_func = (dict(
1108
zip(attribute.func_code.co_freevars,
1109
attribute.__closure__))["func"]
1110
.cell_contents)
1111
# Create a new, but exactly alike, function
1112
# object, and decorate it to be a new D-Bus signal
1113
# with the alternate D-Bus interface name
1114
new_function = (dbus.service.signal
1115
(alt_interface,
1116
attribute._dbus_signature)
1117
(types.FunctionType(
1118
nonmethod_func.func_code,
1119
nonmethod_func.func_globals,
1120
nonmethod_func.func_name,
1121
nonmethod_func.func_defaults,
1122
nonmethod_func.func_closure)))
1123
# Copy annotations, if any
1124
try:
1125
new_function._dbus_annotations = (
1126
dict(attribute._dbus_annotations))
1127
except AttributeError:
1128
pass
1129
# Define a creator of a function to call both the
1130
# original and alternate functions, so both the
1131
# original and alternate signals gets sent when
1132
# the function is called
1133
def fixscope(func1, func2):
1134
"""This function is a scope container to pass
1135
func1 and func2 to the "call_both" function
1136
outside of its arguments"""
1137
def call_both(*args, **kwargs):
1138
"""This function will emit two D-Bus
1139
signals by calling func1 and func2"""
1140
func1(*args, **kwargs)
1141
func2(*args, **kwargs)
1142
return call_both
1143
# Create the "call_both" function and add it to
1144
# the class
1145
attr[attrname] = fixscope(attribute, new_function)
1146
# Is this a D-Bus method?
1147
elif getattr(attribute, "_dbus_is_method", False):
1148
# Create a new, but exactly alike, function
1149
# object. Decorate it to be a new D-Bus method
1150
# with the alternate D-Bus interface name. Add it
1151
# to the class.
1152
attr[attrname] = (dbus.service.method
1153
(alt_interface,
1154
attribute._dbus_in_signature,
1155
attribute._dbus_out_signature)
1156
(types.FunctionType
1157
(attribute.func_code,
1158
attribute.func_globals,
1159
attribute.func_name,
1160
attribute.func_defaults,
1161
attribute.func_closure)))
1162
# Copy annotations, if any
1163
try:
1164
attr[attrname]._dbus_annotations = (
1165
dict(attribute._dbus_annotations))
1166
except AttributeError:
1167
pass
1168
# Is this a D-Bus property?
1169
elif getattr(attribute, "_dbus_is_property", False):
1170
# Create a new, but exactly alike, function
1171
# object, and decorate it to be a new D-Bus
1172
# property with the alternate D-Bus interface
1173
# name. Add it to the class.
1174
attr[attrname] = (dbus_service_property
1175
(alt_interface,
1176
attribute._dbus_signature,
1177
attribute._dbus_access,
1178
attribute
1179
._dbus_get_args_options
1180
["byte_arrays"])
1181
(types.FunctionType
1182
(attribute.func_code,
1183
attribute.func_globals,
1184
attribute.func_name,
1185
attribute.func_defaults,
1186
attribute.func_closure)))
1187
# Copy annotations, if any
1188
try:
1189
attr[attrname]._dbus_annotations = (
1190
dict(attribute._dbus_annotations))
1191
except AttributeError:
1192
pass
1193
# Is this a D-Bus interface?
1194
elif getattr(attribute, "_dbus_is_interface", False):
1195
# Create a new, but exactly alike, function
1196
# object. Decorate it to be a new D-Bus interface
1197
# with the alternate D-Bus interface name. Add it
1198
# to the class.
1199
attr[attrname] = (dbus_interface_annotations
1200
(alt_interface)
1201
(types.FunctionType
1202
(attribute.func_code,
1203
attribute.func_globals,
1204
attribute.func_name,
1205
attribute.func_defaults,
1206
attribute.func_closure)))
1207
if deprecate:
1208
# Deprecate all alternate interfaces
1209
iname="_AlternateDBusNames_interface_annotation{0}"
1210
for interface_name in interface_names:
1211
@dbus_interface_annotations(interface_name)
1212
def func(self):
1213
return { "org.freedesktop.DBus.Deprecated":
1214
"true" }
1215
# Find an unused name
1216
for aname in (iname.format(i)
1217
for i in itertools.count()):
1218
if aname not in attr:
1219
attr[aname] = func
1220
break
1221
if interface_names:
1222
# Replace the class with a new subclass of it with
1223
# methods, signals, etc. as created above.
1224
cls = type(b"{0}Alternate".format(cls.__name__),
1225
(cls,), attr)
1226
return cls
1227
return wrapper
1228
1229
1230
@alternate_dbus_interfaces({"se.recompile.Mandos":
1231
"se.bsnet.fukt.Mandos"})
1232
class ClientDBus(Client, DBusObjectWithProperties):
478
1233
"""A Client class using D-Bus
479
1234
480
1235
Attributes:
481
1236
dbus_object_path: dbus.ObjectPath
482
1237
bus: dbus.SystemBus()
483
1238
"""
1239
1240
runtime_expansions = (Client.runtime_expansions
1241
+ ("dbus_object_path",))
1242
484
1243
# dbus.service.Object doesn't use super(), so we can't either.
485
1244
486
1245
def __init__(self, bus = None, *args, **kwargs):
488
1247
Client.__init__(self, *args, **kwargs)
489
1248
# Only now, when this client is initialized, can it show up on
490
1249
# the D-Bus
1250
client_object_name = unicode(self.name).translate(
1251
{ord("."): ord("_"),
1252
ord("-"): ord("_")})
491
1253
self.dbus_object_path = (dbus.ObjectPath
492
(u"/clients/"
493
+ self.name.replace(u".", u"_")))
494
dbus.service.Object.__init__(self, self.bus,
495
self.dbus_object_path)
496
497
@staticmethod
498
def _datetime_to_dbus(dt, variant_level=0):
499
"""Convert a UTC datetime.datetime() to a D-Bus type."""
500
return dbus.String(dt.isoformat(),
501
variant_level=variant_level)
502
503
def enable(self):
504
oldstate = getattr(self, u"enabled", False)
505
r = Client.enable(self)
506
if oldstate != self.enabled:
507
# Emit D-Bus signals
508
self.PropertyChanged(dbus.String(u"enabled"),
509
dbus.Boolean(True, variant_level=1))
510
self.PropertyChanged(
511
dbus.String(u"last_enabled"),
512
self._datetime_to_dbus(self.last_enabled,
513
variant_level=1))
514
return r
515
516
def disable(self, signal = True):
517
oldstate = getattr(self, u"enabled", False)
518
r = Client.disable(self)
519
if signal and oldstate != self.enabled:
520
# Emit D-Bus signal
521
self.PropertyChanged(dbus.String(u"enabled"),
522
dbus.Boolean(False, variant_level=1))
523
return r
1254
("/clients/" + client_object_name))
1255
DBusObjectWithProperties.__init__(self, self.bus,
1256
self.dbus_object_path)
1257
1258
def notifychangeproperty(transform_func,
1259
dbus_name, type_func=lambda x: x,
1260
variant_level=1):
1261
""" Modify a variable so that it's a property which announces
1262
its changes to DBus.
1263
1264
transform_fun: Function that takes a value and a variant_level
1265
and transforms it to a D-Bus type.
1266
dbus_name: D-Bus name of the variable
1267
type_func: Function that transform the value before sending it
1268
to the D-Bus. Default: no transform
1269
variant_level: D-Bus variant level. Default: 1
1270
"""
1271
attrname = "_{0}".format(dbus_name)
1272
def setter(self, value):
1273
if hasattr(self, "dbus_object_path"):
1274
if (not hasattr(self, attrname) or
1275
type_func(getattr(self, attrname, None))
1276
!= type_func(value)):
1277
dbus_value = transform_func(type_func(value),
1278
variant_level
1279
=variant_level)
1280
self.PropertyChanged(dbus.String(dbus_name),
1281
dbus_value)
1282
setattr(self, attrname, value)
1283
1284
return property(lambda self: getattr(self, attrname), setter)
1285
1286
expires = notifychangeproperty(datetime_to_dbus, "Expires")
1287
approvals_pending = notifychangeproperty(dbus.Boolean,
1288
"ApprovalPending",
1289
type_func = bool)
1290
enabled = notifychangeproperty(dbus.Boolean, "Enabled")
1291
last_enabled = notifychangeproperty(datetime_to_dbus,
1292
"LastEnabled")
1293
checker = notifychangeproperty(dbus.Boolean, "CheckerRunning",
1294
type_func = lambda checker:
1295
checker is not None)
1296
last_checked_ok = notifychangeproperty(datetime_to_dbus,
1297
"LastCheckedOK")
1298
last_checker_status = notifychangeproperty(dbus.Int16,
1299
"LastCheckerStatus")
1300
last_approval_request = notifychangeproperty(
1301
datetime_to_dbus, "LastApprovalRequest")
1302
approved_by_default = notifychangeproperty(dbus.Boolean,
1303
"ApprovedByDefault")
1304
approval_delay = notifychangeproperty(dbus.UInt64,
1305
"ApprovalDelay",
1306
type_func =
1307
timedelta_to_milliseconds)
1308
approval_duration = notifychangeproperty(
1309
dbus.UInt64, "ApprovalDuration",
1310
type_func = timedelta_to_milliseconds)
1311
host = notifychangeproperty(dbus.String, "Host")
1312
timeout = notifychangeproperty(dbus.UInt64, "Timeout",
1313
type_func =
1314
timedelta_to_milliseconds)
1315
extended_timeout = notifychangeproperty(
1316
dbus.UInt64, "ExtendedTimeout",
1317
type_func = timedelta_to_milliseconds)
1318
interval = notifychangeproperty(dbus.UInt64,
1319
"Interval",
1320
type_func =
1321
timedelta_to_milliseconds)
1322
checker_command = notifychangeproperty(dbus.String, "Checker")
1323
1324
del notifychangeproperty
524
1325
525
1326
def __del__(self, *args, **kwargs):
526
1327
try:
527
1328
self.remove_from_connection()
528
1329
except LookupError:
529
1330
pass
530
if hasattr(dbus.service.Object, u"__del__"):
531
dbus.service.Object.__del__(self, *args, **kwargs)
1331
if hasattr(DBusObjectWithProperties, "__del__"):
1332
DBusObjectWithProperties.__del__(self, *args, **kwargs)
532
1333
Client.__del__(self, *args, **kwargs)
533
1334
534
1335
def checker_callback(self, pid, condition, command,
535
1336
*args, **kwargs):
536
1337
self.checker_callback_tag = None
537
1338
self.checker = None
538
# Emit D-Bus signal
539
self.PropertyChanged(dbus.String(u"checker_running"),
540
dbus.Boolean(False, variant_level=1))
541
1339
if os.WIFEXITED(condition):
542
1340
exitstatus = os.WEXITSTATUS(condition)
543
1341
# Emit D-Bus signal
553
1351
return Client.checker_callback(self, pid, condition, command,
554
1352
*args, **kwargs)
555
1353
556
def checked_ok(self, *args, **kwargs):
557
r = Client.checked_ok(self, *args, **kwargs)
558
# Emit D-Bus signal
559
self.PropertyChanged(
560
dbus.String(u"last_checked_ok"),
561
(self._datetime_to_dbus(self.last_checked_ok,
562
variant_level=1)))
563
return r
564
565
1354
def start_checker(self, *args, **kwargs):
566
1355
old_checker = self.checker
567
1356
if self.checker is not None:
574
1363
and old_checker_pid != self.checker.pid):
575
1364
# Emit D-Bus signal
576
1365
self.CheckerStarted(self.current_checker_command)
577
self.PropertyChanged(
578
dbus.String(u"checker_running"),
579
dbus.Boolean(True, variant_level=1))
580
return r
581
582
def stop_checker(self, *args, **kwargs):
583
old_checker = getattr(self, u"checker", None)
584
r = Client.stop_checker(self, *args, **kwargs)
585
if (old_checker is not None
586
and getattr(self, u"checker", None) is None):
587
self.PropertyChanged(dbus.String(u"checker_running"),
588
dbus.Boolean(False, variant_level=1))
589
return r
590
591
## D-Bus methods & signals
592
_interface = u"se.bsnet.fukt.Mandos.Client"
593
594
# CheckedOK - method
595
@dbus.service.method(_interface)
596
def CheckedOK(self):
597
return self.checked_ok()
1366
return r
1367
1368
def _reset_approved(self):
1369
self.approved = None
1370
return False
1371
1372
def approve(self, value=True):
1373
self.approved = value
1374
gobject.timeout_add(timedelta_to_milliseconds
1375
(self.approval_duration),
1376
self._reset_approved)
1377
self.send_changedstate()
1378
1379
## D-Bus methods, signals & properties
1380
_interface = "se.recompile.Mandos.Client"
1381
1382
## Interfaces
1383
1384
@dbus_interface_annotations(_interface)
1385
def _foo(self):
1386
return { "org.freedesktop.DBus.Property.EmitsChangedSignal":
1387
"false"}
1388
1389
## Signals
598
1390
599
1391
# CheckerCompleted - signal
600
@dbus.service.signal(_interface, signature=u"nxs")
1392
@dbus.service.signal(_interface, signature="nxs")
601
1393
def CheckerCompleted(self, exitcode, waitstatus, command):
602
1394
"D-Bus signal"
603
1395
pass
604
1396
605
1397
# CheckerStarted - signal
606
@dbus.service.signal(_interface, signature=u"s")
1398
@dbus.service.signal(_interface, signature="s")
607
1399
def CheckerStarted(self, command):
608
1400
"D-Bus signal"
609
1401
pass
610
1402
611
# GetAllProperties - method
612
@dbus.service.method(_interface, out_signature=u"a{sv}")
613
def GetAllProperties(self):
614
"D-Bus method"
615
return dbus.Dictionary({
616
dbus.String(u"name"):
617
dbus.String(self.name, variant_level=1),
618
dbus.String(u"fingerprint"):
619
dbus.String(self.fingerprint, variant_level=1),
620
dbus.String(u"host"):
621
dbus.String(self.host, variant_level=1),
622
dbus.String(u"created"):
623
self._datetime_to_dbus(self.created,
624
variant_level=1),
625
dbus.String(u"last_enabled"):
626
(self._datetime_to_dbus(self.last_enabled,
627
variant_level=1)
628
if self.last_enabled is not None
629
else dbus.Boolean(False, variant_level=1)),
630
dbus.String(u"enabled"):
631
dbus.Boolean(self.enabled, variant_level=1),
632
dbus.String(u"last_checked_ok"):
633
(self._datetime_to_dbus(self.last_checked_ok,
634
variant_level=1)
635
if self.last_checked_ok is not None
636
else dbus.Boolean (False, variant_level=1)),
637
dbus.String(u"timeout"):
638
dbus.UInt64(self.timeout_milliseconds(),
639
variant_level=1),
640
dbus.String(u"interval"):
641
dbus.UInt64(self.interval_milliseconds(),
642
variant_level=1),
643
dbus.String(u"checker"):
644
dbus.String(self.checker_command,
645
variant_level=1),
646
dbus.String(u"checker_running"):
647
dbus.Boolean(self.checker is not None,
648
variant_level=1),
649
dbus.String(u"object_path"):
650
dbus.ObjectPath(self.dbus_object_path,
651
variant_level=1)
652
}, signature=u"sv")
653
654
# IsStillValid - method
655
@dbus.service.method(_interface, out_signature=u"b")
656
def IsStillValid(self):
657
return self.still_valid()
658
659
1403
# PropertyChanged - signal
660
@dbus.service.signal(_interface, signature=u"sv")
1404
@dbus.service.signal(_interface, signature="sv")
661
1405
def PropertyChanged(self, property, value):
662
1406
"D-Bus signal"
663
1407
pass
664
1408
665
# ReceivedSecret - signal
1409
# GotSecret - signal
666
1410
@dbus.service.signal(_interface)
667
def ReceivedSecret(self):
668
"D-Bus signal"
1411
def GotSecret(self):
1412
"""D-Bus signal
1413
Is sent after a successful transfer of secret from the Mandos
1414
server to mandos-client
1415
"""
669
1416
pass
670
1417
671
1418
# Rejected - signal
672
@dbus.service.signal(_interface)
673
def Rejected(self):
1419
@dbus.service.signal(_interface, signature="s")
1420
def Rejected(self, reason):
674
1421
"D-Bus signal"
675
1422
pass
676
1423
677
# SetChecker - method
678
@dbus.service.method(_interface, in_signature=u"s")
679
def SetChecker(self, checker):
680
"D-Bus setter method"
681
self.checker_command = checker
682
# Emit D-Bus signal
683
self.PropertyChanged(dbus.String(u"checker"),
684
dbus.String(self.checker_command,
685
variant_level=1))
686
687
# SetHost - method
688
@dbus.service.method(_interface, in_signature=u"s")
689
def SetHost(self, host):
690
"D-Bus setter method"
691
self.host = host
692
# Emit D-Bus signal
693
self.PropertyChanged(dbus.String(u"host"),
694
dbus.String(self.host, variant_level=1))
695
696
# SetInterval - method
697
@dbus.service.method(_interface, in_signature=u"t")
698
def SetInterval(self, milliseconds):
699
self.interval = datetime.timedelta(0, 0, 0, milliseconds)
700
# Emit D-Bus signal
701
self.PropertyChanged(dbus.String(u"interval"),
702
(dbus.UInt64(self.interval_milliseconds(),
703
variant_level=1)))
704
705
# SetSecret - method
706
@dbus.service.method(_interface, in_signature=u"ay",
707
byte_arrays=True)
708
def SetSecret(self, secret):
709
"D-Bus setter method"
710
self.secret = str(secret)
711
712
# SetTimeout - method
713
@dbus.service.method(_interface, in_signature=u"t")
714
def SetTimeout(self, milliseconds):
715
self.timeout = datetime.timedelta(0, 0, 0, milliseconds)
716
# Emit D-Bus signal
717
self.PropertyChanged(dbus.String(u"timeout"),
718
(dbus.UInt64(self.timeout_milliseconds(),
719
variant_level=1)))
1424
# NeedApproval - signal
1425
@dbus.service.signal(_interface, signature="tb")
1426
def NeedApproval(self, timeout, default):
1427
"D-Bus signal"
1428
return self.need_approval()
1429
1430
## Methods
1431
1432
# Approve - method
1433
@dbus.service.method(_interface, in_signature="b")
1434
def Approve(self, value):
1435
self.approve(value)
1436
1437
# CheckedOK - method
1438
@dbus.service.method(_interface)
1439
def CheckedOK(self):
1440
self.checked_ok()
720
1441
721
1442
# Enable - method
722
1443
@dbus.service.method(_interface)
741
1462
def StopChecker(self):
742
1463
self.stop_checker()
743
1464
1465
## Properties
1466
1467
# ApprovalPending - property
1468
@dbus_service_property(_interface, signature="b", access="read")
1469
def ApprovalPending_dbus_property(self):
1470
return dbus.Boolean(bool(self.approvals_pending))
1471
1472
# ApprovedByDefault - property
1473
@dbus_service_property(_interface, signature="b",
1474
access="readwrite")
1475
def ApprovedByDefault_dbus_property(self, value=None):
1476
if value is None: # get
1477
return dbus.Boolean(self.approved_by_default)
1478
self.approved_by_default = bool(value)
1479
1480
# ApprovalDelay - property
1481
@dbus_service_property(_interface, signature="t",
1482
access="readwrite")
1483
def ApprovalDelay_dbus_property(self, value=None):
1484
if value is None: # get
1485
return dbus.UInt64(self.approval_delay_milliseconds())
1486
self.approval_delay = datetime.timedelta(0, 0, 0, value)
1487
1488
# ApprovalDuration - property
1489
@dbus_service_property(_interface, signature="t",
1490
access="readwrite")
1491
def ApprovalDuration_dbus_property(self, value=None):
1492
if value is None: # get
1493
return dbus.UInt64(timedelta_to_milliseconds(
1494
self.approval_duration))
1495
self.approval_duration = datetime.timedelta(0, 0, 0, value)
1496
1497
# Name - property
1498
@dbus_service_property(_interface, signature="s", access="read")
1499
def Name_dbus_property(self):
1500
return dbus.String(self.name)
1501
1502
# Fingerprint - property
1503
@dbus_service_property(_interface, signature="s", access="read")
1504
def Fingerprint_dbus_property(self):
1505
return dbus.String(self.fingerprint)
1506
1507
# Host - property
1508
@dbus_service_property(_interface, signature="s",
1509
access="readwrite")
1510
def Host_dbus_property(self, value=None):
1511
if value is None: # get
1512
return dbus.String(self.host)
1513
self.host = unicode(value)
1514
1515
# Created - property
1516
@dbus_service_property(_interface, signature="s", access="read")
1517
def Created_dbus_property(self):
1518
return datetime_to_dbus(self.created)
1519
1520
# LastEnabled - property
1521
@dbus_service_property(_interface, signature="s", access="read")
1522
def LastEnabled_dbus_property(self):
1523
return datetime_to_dbus(self.last_enabled)
1524
1525
# Enabled - property
1526
@dbus_service_property(_interface, signature="b",
1527
access="readwrite")
1528
def Enabled_dbus_property(self, value=None):
1529
if value is None: # get
1530
return dbus.Boolean(self.enabled)
1531
if value:
1532
self.enable()
1533
else:
1534
self.disable()
1535
1536
# LastCheckedOK - property
1537
@dbus_service_property(_interface, signature="s",
1538
access="readwrite")
1539
def LastCheckedOK_dbus_property(self, value=None):
1540
if value is not None:
1541
self.checked_ok()
1542
return
1543
return datetime_to_dbus(self.last_checked_ok)
1544
1545
# LastCheckerStatus - property
1546
@dbus_service_property(_interface, signature="n",
1547
access="read")
1548
def LastCheckerStatus_dbus_property(self):
1549
return dbus.Int16(self.last_checker_status)
1550
1551
# Expires - property
1552
@dbus_service_property(_interface, signature="s", access="read")
1553
def Expires_dbus_property(self):
1554
return datetime_to_dbus(self.expires)
1555
1556
# LastApprovalRequest - property
1557
@dbus_service_property(_interface, signature="s", access="read")
1558
def LastApprovalRequest_dbus_property(self):
1559
return datetime_to_dbus(self.last_approval_request)
1560
1561
# Timeout - property
1562
@dbus_service_property(_interface, signature="t",
1563
access="readwrite")
1564
def Timeout_dbus_property(self, value=None):
1565
if value is None: # get
1566
return dbus.UInt64(self.timeout_milliseconds())
1567
old_timeout = self.timeout
1568
self.timeout = datetime.timedelta(0, 0, 0, value)
1569
# Reschedule disabling
1570
if self.enabled:
1571
now = datetime.datetime.utcnow()
1572
self.expires += self.timeout - old_timeout
1573
if self.expires <= now:
1574
# The timeout has passed
1575
self.disable()
1576
else:
1577
if (getattr(self, "disable_initiator_tag", None)
1578
is None):
1579
return
1580
gobject.source_remove(self.disable_initiator_tag)
1581
self.disable_initiator_tag = (
1582
gobject.timeout_add(
1583
timedelta_to_milliseconds(self.expires - now),
1584
self.disable))
1585
1586
# ExtendedTimeout - property
1587
@dbus_service_property(_interface, signature="t",
1588
access="readwrite")
1589
def ExtendedTimeout_dbus_property(self, value=None):
1590
if value is None: # get
1591
return dbus.UInt64(self.extended_timeout_milliseconds())
1592
self.extended_timeout = datetime.timedelta(0, 0, 0, value)
1593
1594
# Interval - property
1595
@dbus_service_property(_interface, signature="t",
1596
access="readwrite")
1597
def Interval_dbus_property(self, value=None):
1598
if value is None: # get
1599
return dbus.UInt64(self.interval_milliseconds())
1600
self.interval = datetime.timedelta(0, 0, 0, value)
1601
if getattr(self, "checker_initiator_tag", None) is None:
1602
return
1603
if self.enabled:
1604
# Reschedule checker run
1605
gobject.source_remove(self.checker_initiator_tag)
1606
self.checker_initiator_tag = (gobject.timeout_add
1607
(value, self.start_checker))
1608
self.start_checker() # Start one now, too
1609
1610
# Checker - property
1611
@dbus_service_property(_interface, signature="s",
1612
access="readwrite")
1613
def Checker_dbus_property(self, value=None):
1614
if value is None: # get
1615
return dbus.String(self.checker_command)
1616
self.checker_command = unicode(value)
1617
1618
# CheckerRunning - property
1619
@dbus_service_property(_interface, signature="b",
1620
access="readwrite")
1621
def CheckerRunning_dbus_property(self, value=None):
1622
if value is None: # get
1623
return dbus.Boolean(self.checker is not None)
1624
if value:
1625
self.start_checker()
1626
else:
1627
self.stop_checker()
1628
1629
# ObjectPath - property
1630
@dbus_service_property(_interface, signature="o", access="read")
1631
def ObjectPath_dbus_property(self):
1632
return self.dbus_object_path # is already a dbus.ObjectPath
1633
1634
# Secret = property
1635
@dbus_service_property(_interface, signature="ay",
1636
access="write", byte_arrays=True)
1637
def Secret_dbus_property(self, value):
1638
self.secret = str(value)
1639
744
1640
del _interface
745
1641
746
1642
1643
class ProxyClient(object):
1644
def __init__(self, child_pipe, fpr, address):
1645
self._pipe = child_pipe
1646
self._pipe.send(('init', fpr, address))
1647
if not self._pipe.recv():
1648
raise KeyError()
1649
1650
def __getattribute__(self, name):
1651
if name == '_pipe':
1652
return super(ProxyClient, self).__getattribute__(name)
1653
self._pipe.send(('getattr', name))
1654
data = self._pipe.recv()
1655
if data[0] == 'data':
1656
return data[1]
1657
if data[0] == 'function':
1658
def func(*args, **kwargs):
1659
self._pipe.send(('funcall', name, args, kwargs))
1660
return self._pipe.recv()[1]
1661
return func
1662
1663
def __setattr__(self, name, value):
1664
if name == '_pipe':
1665
return super(ProxyClient, self).__setattr__(name, value)
1666
self._pipe.send(('setattr', name, value))
1667
1668
747
1669
class ClientHandler(socketserver.BaseRequestHandler, object):
748
1670
"""A class to handle client connections.
749
1671
751
1673
Note: This will run in its own forked process."""
752
1674
753
1675
def handle(self):
754
logger.info(u"TCP connection from: %s",
755
unicode(self.client_address))
756
logger.debug(u"IPC Pipe FD: %d", self.server.pipe[1])
757
# Open IPC pipe to parent process
758
with closing(os.fdopen(self.server.pipe[1], u"w", 1)) as ipc:
1676
with contextlib.closing(self.server.child_pipe) as child_pipe:
1677
logger.info("TCP connection from: %s",
1678
unicode(self.client_address))
1679
logger.debug("Pipe FD: %d",
1680
self.server.child_pipe.fileno())
1681
759
1682
session = (gnutls.connection
760
1683
.ClientSession(self.request,
761
1684
gnutls.connection
762
1685
.X509Credentials()))
763
1686
764
line = self.request.makefile().readline()
765
logger.debug(u"Protocol version: %r", line)
766
try:
767
if int(line.strip().split()[0]) > 1:
768
raise RuntimeError
769
except (ValueError, IndexError, RuntimeError), error:
770
logger.error(u"Unknown protocol version: %s", error)
771
return
772
773
1687
# Note: gnutls.connection.X509Credentials is really a
774
1688
# generic GnuTLS certificate credentials object so long as
775
1689
# no X.509 keys are added to it. Therefore, we can use it
776
1690
# here despite using OpenPGP certificates.
777
1691
778
#priority = u':'.join((u"NONE", u"+VERS-TLS1.1",
779
# u"+AES-256-CBC", u"+SHA1",
780
# u"+COMP-NULL", u"+CTYPE-OPENPGP",
781
# u"+DHE-DSS"))
1692
#priority = ':'.join(("NONE", "+VERS-TLS1.1",
1693
# "+AES-256-CBC", "+SHA1",
1694
# "+COMP-NULL", "+CTYPE-OPENPGP",
1695
# "+DHE-DSS"))
782
1696
# Use a fallback default, since this MUST be set.
783
1697
priority = self.server.gnutls_priority
784
1698
if priority is None:
785
priority = u"NORMAL"
1699
priority = "NORMAL"
786
1700
(gnutls.library.functions
787
1701
.gnutls_priority_set_direct(session._c_object,
788
1702
priority, None))
789
1703
1704
# Start communication using the Mandos protocol
1705
# Get protocol number
1706
line = self.request.makefile().readline()
1707
logger.debug("Protocol version: %r", line)
1708
try:
1709
if int(line.strip().split()[0]) > 1:
1710
raise RuntimeError(line)
1711
except (ValueError, IndexError, RuntimeError) as error:
1712
logger.error("Unknown protocol version: %s", error)
1713
return
1714
1715
# Start GnuTLS connection
790
1716
try:
791
1717
session.handshake()
792
except gnutls.errors.GNUTLSError, error:
793
logger.warning(u"Handshake failed: %s", error)
1718
except gnutls.errors.GNUTLSError as error:
1719
logger.warning("Handshake failed: %s", error)
794
1720
# Do not run session.bye() here: the session is not
795
1721
# established. Just abandon the request.
796
1722
return
797
logger.debug(u"Handshake succeeded")
1723
logger.debug("Handshake succeeded")
1724
1725
approval_required = False
798
1726
try:
799
fpr = self.fingerprint(self.peer_certificate(session))
800
except (TypeError, gnutls.errors.GNUTLSError), error:
801
logger.warning(u"Bad certificate: %s", error)
802
session.bye()
803
return
804
logger.debug(u"Fingerprint: %s", fpr)
1727
try:
1728
fpr = self.fingerprint(self.peer_certificate
1729
(session))
1730
except (TypeError,
1731
gnutls.errors.GNUTLSError) as error:
1732
logger.warning("Bad certificate: %s", error)
1733
return
1734
logger.debug("Fingerprint: %s", fpr)
1735
1736
try:
1737
client = ProxyClient(child_pipe, fpr,
1738
self.client_address)
1739
except KeyError:
1740
return
1741
1742
if client.approval_delay:
1743
delay = client.approval_delay
1744
client.approvals_pending += 1
1745
approval_required = True
1746
1747
while True:
1748
if not client.enabled:
1749
logger.info("Client %s is disabled",
1750
client.name)
1751
if self.server.use_dbus:
1752
# Emit D-Bus signal
1753
client.Rejected("Disabled")
1754
return
1755
1756
if client.approved or not client.approval_delay:
1757
#We are approved or approval is disabled
1758
break
1759
elif client.approved is None:
1760
logger.info("Client %s needs approval",
1761
client.name)
1762
if self.server.use_dbus:
1763
# Emit D-Bus signal
1764
client.NeedApproval(
1765
client.approval_delay_milliseconds(),
1766
client.approved_by_default)
1767
else:
1768
logger.warning("Client %s was not approved",
1769
client.name)
1770
if self.server.use_dbus:
1771
# Emit D-Bus signal
1772
client.Rejected("Denied")
1773
return
1774
1775
#wait until timeout or approved
1776
time = datetime.datetime.now()
1777
client.changedstate.acquire()
1778
client.changedstate.wait(
1779
float(timedelta_to_milliseconds(delay)
1780
/ 1000))
1781
client.changedstate.release()
1782
time2 = datetime.datetime.now()
1783
if (time2 - time) >= delay:
1784
if not client.approved_by_default:
1785
logger.warning("Client %s timed out while"
1786
" waiting for approval",
1787
client.name)
1788
if self.server.use_dbus:
1789
# Emit D-Bus signal
1790
client.Rejected("Approval timed out")
1791
return
1792
else:
1793
break
1794
else:
1795
delay -= time2 - time
1796
1797
sent_size = 0
1798
while sent_size < len(client.secret):
1799
try:
1800
sent = session.send(client.secret[sent_size:])
1801
except gnutls.errors.GNUTLSError as error:
1802
logger.warning("gnutls send failed",
1803
exc_info=error)
1804
return
1805
logger.debug("Sent: %d, remaining: %d",
1806
sent, len(client.secret)
1807
- (sent_size + sent))
1808
sent_size += sent
1809
1810
logger.info("Sending secret to %s", client.name)
1811
# bump the timeout using extended_timeout
1812
client.bump_timeout(client.extended_timeout)
1813
if self.server.use_dbus:
1814
# Emit D-Bus signal
1815
client.GotSecret()
805
1816
806
for c in self.server.clients:
807
if c.fingerprint == fpr:
808
client = c
809
break
810
else:
811
ipc.write(u"NOTFOUND %s\n" % fpr)
812
session.bye()
813
return
814
# Have to check if client.still_valid(), since it is
815
# possible that the client timed out while establishing
816
# the GnuTLS session.
817
if not client.still_valid():
818
ipc.write(u"INVALID %s\n" % client.name)
819
session.bye()
820
return
821
ipc.write(u"SENDING %s\n" % client.name)
822
sent_size = 0
823
while sent_size < len(client.secret):
824
sent = session.send(client.secret[sent_size:])
825
logger.debug(u"Sent: %d, remaining: %d",
826
sent, len(client.secret)
827
- (sent_size + sent))
828
sent_size += sent
829
session.bye()
1817
finally:
1818
if approval_required:
1819
client.approvals_pending -= 1
1820
try:
1821
session.bye()
1822
except gnutls.errors.GNUTLSError as error:
1823
logger.warning("GnuTLS bye failed",
1824
exc_info=error)
830
1825
831
1826
@staticmethod
832
1827
def peer_certificate(session):
842
1837
.gnutls_certificate_get_peers
843
1838
(session._c_object, ctypes.byref(list_size)))
844
1839
if not bool(cert_list) and list_size.value != 0:
845
raise gnutls.errors.GNUTLSError(u"error getting peer"
846
u" certificate")
1840
raise gnutls.errors.GNUTLSError("error getting peer"
1841
" certificate")
847
1842
if list_size.value == 0:
848
1843
return None
849
1844
cert = cert_list[0]
875
1870
if crtverify.value != 0:
876
1871
gnutls.library.functions.gnutls_openpgp_crt_deinit(crt)
877
1872
raise (gnutls.errors.CertificateSecurityError
878
(u"Verify failed"))
1873
("Verify failed"))
879
1874
# New buffer for the fingerprint
880
1875
buf = ctypes.create_string_buffer(20)
881
1876
buf_len = ctypes.c_size_t()
888
1883
# Convert the buffer to a Python bytestring
889
1884
fpr = ctypes.string_at(buf, buf_len.value)
890
1885
# Convert the bytestring to hexadecimal notation
891
hex_fpr = u''.join(u"%02X" % ord(char) for char in fpr)
1886
hex_fpr = binascii.hexlify(fpr).upper()
892
1887
return hex_fpr
893
1888
894
1889
895
class ForkingMixInWithPipe(socketserver.ForkingMixIn, object):
896
"""Like socketserver.ForkingMixIn, but also pass a pipe."""
1890
class MultiprocessingMixIn(object):
1891
"""Like socketserver.ThreadingMixIn, but with multiprocessing"""
1892
def sub_process_main(self, request, address):
1893
try:
1894
self.finish_request(request, address)
1895
except Exception:
1896
self.handle_error(request, address)
1897
self.close_request(request)
1898
1899
def process_request(self, request, address):
1900
"""Start a new process to process the request."""
1901
proc = multiprocessing.Process(target = self.sub_process_main,
1902
args = (request, address))
1903
proc.start()
1904
return proc
1905
1906
1907
class MultiprocessingMixInWithPipe(MultiprocessingMixIn, object):
1908
""" adds a pipe to the MixIn """
897
1909
def process_request(self, request, client_address):
898
1910
"""Overrides and wraps the original process_request().
899
1911
900
This function creates a new pipe in self.pipe
1912
This function creates a new pipe in self.pipe
901
1913
"""
902
self.pipe = os.pipe()
903
super(ForkingMixInWithPipe,
904
self).process_request(request, client_address)
905
os.close(self.pipe[1]) # close write end
906
self.add_pipe(self.pipe[0])
907
def add_pipe(self, pipe):
1914
parent_pipe, self.child_pipe = multiprocessing.Pipe()
1915
1916
proc = MultiprocessingMixIn.process_request(self, request,
1917
client_address)
1918
self.child_pipe.close()
1919
self.add_pipe(parent_pipe, proc)
1920
1921
def add_pipe(self, parent_pipe, proc):
908
1922
"""Dummy function; override as necessary"""
909
os.close(pipe)
910
911
912
class IPv6_TCPServer(ForkingMixInWithPipe,
1923
raise NotImplementedError()
1924
1925
1926
class IPv6_TCPServer(MultiprocessingMixInWithPipe,
913
1927
socketserver.TCPServer, object):
914
1928
"""IPv6-capable TCP server. Accepts 'None' as address and/or port
915
1929
919
1933
use_ipv6: Boolean; to use IPv6 or not
920
1934
"""
921
1935
def __init__(self, server_address, RequestHandlerClass,
922
interface=None, use_ipv6=True):
1936
interface=None, use_ipv6=True, socketfd=None):
1937
"""If socketfd is set, use that file descriptor instead of
1938
creating a new one with socket.socket().
1939
"""
923
1940
self.interface = interface
924
1941
if use_ipv6:
925
1942
self.address_family = socket.AF_INET6
1943
if socketfd is not None:
1944
# Save the file descriptor
1945
self.socketfd = socketfd
1946
# Save the original socket.socket() function
1947
self.socket_socket = socket.socket
1948
# To implement --socket, we monkey patch socket.socket.
1949
#
1950
# (When socketserver.TCPServer is a new-style class, we
1951
# could make self.socket into a property instead of monkey
1952
# patching socket.socket.)
1953
#
1954
# Create a one-time-only replacement for socket.socket()
1955
@functools.wraps(socket.socket)
1956
def socket_wrapper(*args, **kwargs):
1957
# Restore original function so subsequent calls are
1958
# not affected.
1959
socket.socket = self.socket_socket
1960
del self.socket_socket
1961
# This time only, return a new socket object from the
1962
# saved file descriptor.
1963
return socket.fromfd(self.socketfd, *args, **kwargs)
1964
# Replace socket.socket() function with wrapper
1965
socket.socket = socket_wrapper
1966
# The socketserver.TCPServer.__init__ will call
1967
# socket.socket(), which might be our replacement,
1968
# socket_wrapper(), if socketfd was set.
926
1969
socketserver.TCPServer.__init__(self, server_address,
927
1970
RequestHandlerClass)
1971
928
1972
def server_bind(self):
929
1973
"""This overrides the normal server_bind() function
930
1974
to bind to an interface if one was specified, and also NOT to
931
1975
bind to an address or port if they were not specified."""
932
1976
if self.interface is not None:
933
1977
if SO_BINDTODEVICE is None:
934
logger.error(u"SO_BINDTODEVICE does not exist;"
935
u" cannot bind to interface %s",
1978
logger.error("SO_BINDTODEVICE does not exist;"
1979
" cannot bind to interface %s",
936
1980
self.interface)
937
1981
else:
938
1982
try:
939
1983
self.socket.setsockopt(socket.SOL_SOCKET,
940
1984
SO_BINDTODEVICE,
941
str(self.interface
942
+ u'\0'))
943
except socket.error, error:
944
if error[0] == errno.EPERM:
945
logger.error(u"No permission to"
946
u" bind to interface %s",
947
self.interface)
948
elif error[0] == errno.ENOPROTOOPT:
949
logger.error(u"SO_BINDTODEVICE not available;"
950
u" cannot bind to interface %s",
951
self.interface)
1985
str(self.interface + '\0'))
1986
except socket.error as error:
1987
if error.errno == errno.EPERM:
1988
logger.error("No permission to bind to"
1989
" interface %s", self.interface)
1990
elif error.errno == errno.ENOPROTOOPT:
1991
logger.error("SO_BINDTODEVICE not available;"
1992
" cannot bind to interface %s",
1993
self.interface)
1994
elif error.errno == errno.ENODEV:
1995
logger.error("Interface %s does not exist,"
1996
" cannot bind", self.interface)
952
1997
else:
953
1998
raise
954
1999
# Only bind(2) the socket if we really need to.
955
2000
if self.server_address[0] or self.server_address[1]:
956
2001
if not self.server_address[0]:
957
2002
if self.address_family == socket.AF_INET6:
958
any_address = u"::" # in6addr_any
2003
any_address = "::" # in6addr_any
959
2004
else:
960
any_address = socket.INADDR_ANY
2005
any_address = "0.0.0.0" # INADDR_ANY
961
2006
self.server_address = (any_address,
962
2007
self.server_address[1])
963
2008
elif not self.server_address[1]:
979
2024
clients: set of Client objects
980
2025
gnutls_priority GnuTLS priority string
981
2026
use_dbus: Boolean; to emit D-Bus signals or not
982
clients: set of Client objects
983
gnutls_priority GnuTLS priority string
984
use_dbus: Boolean; to emit D-Bus signals or not
985
2027
986
2028
Assumes a gobject.MainLoop event loop.
987
2029
"""
988
2030
def __init__(self, server_address, RequestHandlerClass,
989
2031
interface=None, use_ipv6=True, clients=None,
990
gnutls_priority=None, use_dbus=True):
2032
gnutls_priority=None, use_dbus=True, socketfd=None):
991
2033
self.enabled = False
992
2034
self.clients = clients
2035
if self.clients is None:
2036
self.clients = {}
993
2037
self.use_dbus = use_dbus
994
2038
self.gnutls_priority = gnutls_priority
995
2039
IPv6_TCPServer.__init__(self, server_address,
996
2040
RequestHandlerClass,
997
2041
interface = interface,
998
use_ipv6 = use_ipv6)
2042
use_ipv6 = use_ipv6,
2043
socketfd = socketfd)
999
2044
def server_activate(self):
1000
2045
if self.enabled:
1001
2046
return socketserver.TCPServer.server_activate(self)
2047
1002
2048
def enable(self):
1003
2049
self.enabled = True
1004
def add_pipe(self, pipe):
2050
2051
def add_pipe(self, parent_pipe, proc):
1005
2052
# Call "handle_ipc" for both data and EOF events
1006
gobject.io_add_watch(pipe, gobject.IO_IN | gobject.IO_HUP,
1007
self.handle_ipc)
1008
def handle_ipc(self, source, condition, file_objects={}):
1009
condition_names = {
1010
gobject.IO_IN: u"IN", # There is data to read.
1011
gobject.IO_OUT: u"OUT", # Data can be written (without
1012
# blocking).
1013
gobject.IO_PRI: u"PRI", # There is urgent data to read.
1014
gobject.IO_ERR: u"ERR", # Error condition.
1015
gobject.IO_HUP: u"HUP" # Hung up (the connection has been
1016
# broken, usually for pipes and
1017
# sockets).
1018
}
1019
conditions_string = ' | '.join(name
1020
for cond, name in
1021
condition_names.iteritems()
1022
if cond & condition)
1023
logger.debug(u"Handling IPC: FD = %d, condition = %s", source,
1024
conditions_string)
1025
1026
# Turn the pipe file descriptor into a Python file object
1027
if source not in file_objects:
1028
file_objects[source] = os.fdopen(source, u"r", 1)
1029
1030
# Read a line from the file object
1031
cmdline = file_objects[source].readline()
1032
if not cmdline: # Empty line means end of file
1033
# close the IPC pipe
1034
file_objects[source].close()
1035
del file_objects[source]
1036
1037
# Stop calling this function
1038
return False
1039
1040
logger.debug(u"IPC command: %r", cmdline)
1041
1042
# Parse and act on command
1043
cmd, args = cmdline.rstrip(u"\r\n").split(None, 1)
1044
1045
if cmd == u"NOTFOUND":
1046
logger.warning(u"Client not found for fingerprint: %s",
1047
args)
1048
if self.use_dbus:
1049
# Emit D-Bus signal
1050
mandos_dbus_service.ClientNotFound(args)
1051
elif cmd == u"INVALID":
1052
for client in self.clients:
1053
if client.name == args:
1054
logger.warning(u"Client %s is invalid", args)
1055
if self.use_dbus:
1056
# Emit D-Bus signal
1057
client.Rejected()
1058
break
1059
else:
1060
logger.error(u"Unknown client %s is invalid", args)
1061
elif cmd == u"SENDING":
1062
for client in self.clients:
1063
if client.name == args:
1064
logger.info(u"Sending secret to %s", client.name)
1065
client.checked_ok()
1066
if self.use_dbus:
1067
# Emit D-Bus signal
1068
client.ReceivedSecret()
1069
break
1070
else:
1071
logger.error(u"Sending secret to unknown client %s",
1072
args)
2053
gobject.io_add_watch(parent_pipe.fileno(),
2054
gobject.IO_IN | gobject.IO_HUP,
2055
functools.partial(self.handle_ipc,
2056
parent_pipe =
2057
parent_pipe,
2058
proc = proc))
2059
2060
def handle_ipc(self, source, condition, parent_pipe=None,
2061
proc = None, client_object=None):
2062
# error, or the other end of multiprocessing.Pipe has closed
2063
if condition & (gobject.IO_ERR | gobject.IO_HUP):
2064
# Wait for other process to exit
2065
proc.join()
2066
return False
2067
2068
# Read a request from the child
2069
request = parent_pipe.recv()
2070
command = request[0]
2071
2072
if command == 'init':
2073
fpr = request[1]
2074
address = request[2]
2075
2076
for c in self.clients.itervalues():
2077
if c.fingerprint == fpr:
2078
client = c
2079
break
2080
else:
2081
logger.info("Client not found for fingerprint: %s, ad"
2082
"dress: %s", fpr, address)
2083
if self.use_dbus:
2084
# Emit D-Bus signal
2085
mandos_dbus_service.ClientNotFound(fpr,
2086
address[0])
2087
parent_pipe.send(False)
2088
return False
2089
2090
gobject.io_add_watch(parent_pipe.fileno(),
2091
gobject.IO_IN | gobject.IO_HUP,
2092
functools.partial(self.handle_ipc,
2093
parent_pipe =
2094
parent_pipe,
2095
proc = proc,
2096
client_object =
2097
client))
2098
parent_pipe.send(True)
2099
# remove the old hook in favor of the new above hook on
2100
# same fileno
2101
return False
2102
if command == 'funcall':
2103
funcname = request[1]
2104
args = request[2]
2105
kwargs = request[3]
2106
2107
parent_pipe.send(('data', getattr(client_object,
2108
funcname)(*args,
2109
**kwargs)))
2110
2111
if command == 'getattr':
2112
attrname = request[1]
2113
if callable(client_object.__getattribute__(attrname)):
2114
parent_pipe.send(('function',))
2115
else:
2116
parent_pipe.send(('data', client_object
2117
.__getattribute__(attrname)))
2118
2119
if command == 'setattr':
2120
attrname = request[1]
2121
value = request[2]
2122
setattr(client_object, attrname, value)
2123
2124
return True
2125
2126
2127
def rfc3339_duration_to_delta(duration):
2128
"""Parse an RFC 3339 "duration" and return a datetime.timedelta
2129
2130
>>> rfc3339_duration_to_delta("P7D")
2131
datetime.timedelta(7)
2132
>>> rfc3339_duration_to_delta("PT60S")
2133
datetime.timedelta(0, 60)
2134
>>> rfc3339_duration_to_delta("PT60M")
2135
datetime.timedelta(0, 3600)
2136
>>> rfc3339_duration_to_delta("PT24H")
2137
datetime.timedelta(1)
2138
>>> rfc3339_duration_to_delta("P1W")
2139
datetime.timedelta(7)
2140
>>> rfc3339_duration_to_delta("PT5M30S")
2141
datetime.timedelta(0, 330)
2142
>>> rfc3339_duration_to_delta("P1DT3M20S")
2143
datetime.timedelta(1, 200)
2144
"""
2145
2146
# Parsing an RFC 3339 duration with regular expressions is not
2147
# possible - there would have to be multiple places for the same
2148
# values, like seconds. The current code, while more esoteric, is
2149
# cleaner without depending on a parsing library. If Python had a
2150
# built-in library for parsing we would use it, but we'd like to
2151
# avoid excessive use of external libraries.
2152
2153
# New type for defining tokens, syntax, and semantics all-in-one
2154
Token = collections.namedtuple("Token",
2155
("regexp", # To match token; if
2156
# "value" is not None,
2157
# must have a "group"
2158
# containing digits
2159
"value", # datetime.timedelta or
2160
# None
2161
"followers")) # Tokens valid after
2162
# this token
2163
# RFC 3339 "duration" tokens, syntax, and semantics; taken from
2164
# the "duration" ABNF definition in RFC 3339, Appendix A.
2165
token_end = Token(re.compile(r"$"), None, frozenset())
2166
token_second = Token(re.compile(r"(\d+)S"),
2167
datetime.timedelta(seconds=1),
2168
frozenset((token_end,)))
2169
token_minute = Token(re.compile(r"(\d+)M"),
2170
datetime.timedelta(minutes=1),
2171
frozenset((token_second, token_end)))
2172
token_hour = Token(re.compile(r"(\d+)H"),
2173
datetime.timedelta(hours=1),
2174
frozenset((token_minute, token_end)))
2175
token_time = Token(re.compile(r"T"),
2176
None,
2177
frozenset((token_hour, token_minute,
2178
token_second)))
2179
token_day = Token(re.compile(r"(\d+)D"),
2180
datetime.timedelta(days=1),
2181
frozenset((token_time, token_end)))
2182
token_month = Token(re.compile(r"(\d+)M"),
2183
datetime.timedelta(weeks=4),
2184
frozenset((token_day, token_end)))
2185
token_year = Token(re.compile(r"(\d+)Y"),
2186
datetime.timedelta(weeks=52),
2187
frozenset((token_month, token_end)))
2188
token_week = Token(re.compile(r"(\d+)W"),
2189
datetime.timedelta(weeks=1),
2190
frozenset((token_end,)))
2191
token_duration = Token(re.compile(r"P"), None,
2192
frozenset((token_year, token_month,
2193
token_day, token_time,
2194
token_week))),
2195
# Define starting values
2196
value = datetime.timedelta() # Value so far
2197
found_token = None
2198
followers = frozenset(token_duration,) # Following valid tokens
2199
s = duration # String left to parse
2200
# Loop until end token is found
2201
while found_token is not token_end:
2202
# Search for any currently valid tokens
2203
for token in followers:
2204
match = token.regexp.match(s)
2205
if match is not None:
2206
# Token found
2207
if token.value is not None:
2208
# Value found, parse digits
2209
factor = int(match.group(1), 10)
2210
# Add to value so far
2211
value += factor * token.value
2212
# Strip token from string
2213
s = token.regexp.sub("", s, 1)
2214
# Go to found token
2215
found_token = token
2216
# Set valid next tokens
2217
followers = found_token.followers
2218
break
1073
2219
else:
1074
logger.error(u"Unknown IPC command: %r", cmdline)
1075
1076
# Keep calling this function
1077
return True
2220
# No currently valid tokens were found
2221
raise ValueError("Invalid RFC 3339 duration")
2222
# End token found
2223
return value
1078
2224
1079
2225
1080
2226
def string_to_delta(interval):
1081
2227
"""Parse a string and return a datetime.timedelta
1082
2228
1083
>>> string_to_delta(u'7d')
2229
>>> string_to_delta('7d')
1084
2230
datetime.timedelta(7)
1085
>>> string_to_delta(u'60s')
2231
>>> string_to_delta('60s')
1086
2232
datetime.timedelta(0, 60)
1087
>>> string_to_delta(u'60m')
2233
>>> string_to_delta('60m')
1088
2234
datetime.timedelta(0, 3600)
1089
>>> string_to_delta(u'24h')
2235
>>> string_to_delta('24h')
1090
2236
datetime.timedelta(1)
1091
>>> string_to_delta(u'1w')
2237
>>> string_to_delta('1w')
1092
2238
datetime.timedelta(7)
1093
>>> string_to_delta(u'5m 30s')
2239
>>> string_to_delta('5m 30s')
1094
2240
datetime.timedelta(0, 330)
1095
2241
"""
2242
2243
try:
2244
return rfc3339_duration_to_delta(interval)
2245
except ValueError:
2246
pass
2247
1096
2248
timevalue = datetime.timedelta(0)
1097
2249
for s in interval.split():
1098
2250
try:
1099
2251
suffix = unicode(s[-1])
1100
2252
value = int(s[:-1])
1101
if suffix == u"d":
2253
if suffix == "d":
1102
2254
delta = datetime.timedelta(value)
1103
elif suffix == u"s":
2255
elif suffix == "s":
1104
2256
delta = datetime.timedelta(0, value)
1105
elif suffix == u"m":
2257
elif suffix == "m":
1106
2258
delta = datetime.timedelta(0, 0, 0, 0, value)
1107
elif suffix == u"h":
2259
elif suffix == "h":
1108
2260
delta = datetime.timedelta(0, 0, 0, 0, 0, value)
1109
elif suffix == u"w":
2261
elif suffix == "w":
1110
2262
delta = datetime.timedelta(0, 0, 0, 0, 0, 0, value)
1111
2263
else:
1112
raise ValueError
1113
except (ValueError, IndexError):
1114
raise ValueError
2264
raise ValueError("Unknown suffix {0!r}"
2265
.format(suffix))
2266
except IndexError as e:
2267
raise ValueError(*(e.args))
1115
2268
timevalue += delta
1116
2269
return timevalue
1117
2270
1118
2271
1119
def if_nametoindex(interface):
1120
"""Call the C function if_nametoindex(), or equivalent
1121
1122
Note: This function cannot accept a unicode string."""
1123
global if_nametoindex
1124
try:
1125
if_nametoindex = (ctypes.cdll.LoadLibrary
1126
(ctypes.util.find_library(u"c"))
1127
.if_nametoindex)
1128
except (OSError, AttributeError):
1129
logger.warning(u"Doing if_nametoindex the hard way")
1130
def if_nametoindex(interface):
1131
"Get an interface index the hard way, i.e. using fcntl()"
1132
SIOCGIFINDEX = 0x8933 # From /usr/include/linux/sockios.h
1133
with closing(socket.socket()) as s:
1134
ifreq = fcntl.ioctl(s, SIOCGIFINDEX,
1135
struct.pack(str(u"16s16x"),
1136
interface))
1137
interface_index = struct.unpack(str(u"I"),
1138
ifreq[16:20])[0]
1139
return interface_index
1140
return if_nametoindex(interface)
1141
1142
1143
2272
def daemon(nochdir = False, noclose = False):
1144
2273
"""See daemon(3). Standard BSD Unix function.
1145
2274
1148
2277
sys.exit()
1149
2278
os.setsid()
1150
2279
if not nochdir:
1151
os.chdir(u"/")
2280
os.chdir("/")
1152
2281
if os.fork():
1153
2282
sys.exit()
1154
2283
if not noclose:
1155
2284
# Close all standard open file descriptors
1156
null = os.open(os.path.devnull, os.O_NOCTTY | os.O_RDWR)
2285
null = os.open(os.devnull, os.O_NOCTTY | os.O_RDWR)
1157
2286
if not stat.S_ISCHR(os.fstat(null).st_mode):
1158
2287
raise OSError(errno.ENODEV,
1159
u"/dev/null not a character device")
2288
"{0} not a character device"
2289
.format(os.devnull))
1160
2290
os.dup2(null, sys.stdin.fileno())
1161
2291
os.dup2(null, sys.stdout.fileno())
1162
2292
os.dup2(null, sys.stderr.fileno())
1166
2296
1167
2297
def main():
1168
2298
1169
######################################################################
2299
##################################################################
1170
2300
# Parsing of options, both command line and config file
1171
2301
1172
parser = optparse.OptionParser(version = "%%prog %s" % version)
1173
parser.add_option("-i", u"--interface", type=u"string",
1174
metavar="IF", help=u"Bind to interface IF")
1175
parser.add_option("-a", u"--address", type=u"string",
1176
help=u"Address to listen for requests on")
1177
parser.add_option("-p", u"--port", type=u"int",
1178
help=u"Port number to receive requests on")
1179
parser.add_option("--check", action=u"store_true",
1180
help=u"Run self-test")
1181
parser.add_option("--debug", action=u"store_true",
1182
help=u"Debug mode; run in foreground and log to"
1183
u" terminal")
1184
parser.add_option("--priority", type=u"string", help=u"GnuTLS"
1185
u" priority string (see GnuTLS documentation)")
1186
parser.add_option("--servicename", type=u"string",
1187
metavar=u"NAME", help=u"Zeroconf service name")
1188
parser.add_option("--configdir", type=u"string",
1189
default=u"/etc/mandos", metavar=u"DIR",
1190
help=u"Directory to search for configuration"
1191
u" files")
1192
parser.add_option("--no-dbus", action=u"store_false",
1193
dest=u"use_dbus", help=u"Do not provide D-Bus"
1194
u" system bus interface")
1195
parser.add_option("--no-ipv6", action=u"store_false",
1196
dest=u"use_ipv6", help=u"Do not use IPv6")
1197
options = parser.parse_args()[0]
2302
parser = argparse.ArgumentParser()
2303
parser.add_argument("-v", "--version", action="version",
2304
version = "%(prog)s {0}".format(version),
2305
help="show version number and exit")
2306
parser.add_argument("-i", "--interface", metavar="IF",
2307
help="Bind to interface IF")
2308
parser.add_argument("-a", "--address",
2309
help="Address to listen for requests on")
2310
parser.add_argument("-p", "--port", type=int,
2311
help="Port number to receive requests on")
2312
parser.add_argument("--check", action="store_true",
2313
help="Run self-test")
2314
parser.add_argument("--debug", action="store_true",
2315
help="Debug mode; run in foreground and log"
2316
" to terminal", default=None)
2317
parser.add_argument("--debuglevel", metavar="LEVEL",
2318
help="Debug level for stdout output")
2319
parser.add_argument("--priority", help="GnuTLS"
2320
" priority string (see GnuTLS documentation)")
2321
parser.add_argument("--servicename",
2322
metavar="NAME", help="Zeroconf service name")
2323
parser.add_argument("--configdir",
2324
default="/etc/mandos", metavar="DIR",
2325
help="Directory to search for configuration"
2326
" files")
2327
parser.add_argument("--no-dbus", action="store_false",
2328
dest="use_dbus", help="Do not provide D-Bus"
2329
" system bus interface", default=None)
2330
parser.add_argument("--no-ipv6", action="store_false",
2331
dest="use_ipv6", help="Do not use IPv6",
2332
default=None)
2333
parser.add_argument("--no-restore", action="store_false",
2334
dest="restore", help="Do not restore stored"
2335
" state", default=None)
2336
parser.add_argument("--socket", type=int,
2337
help="Specify a file descriptor to a network"
2338
" socket to use instead of creating one")
2339
parser.add_argument("--statedir", metavar="DIR",
2340
help="Directory to save/restore state in")
2341
parser.add_argument("--foreground", action="store_true",
2342
help="Run in foreground", default=None)
2343
2344
options = parser.parse_args()
1198
2345
1199
2346
if options.check:
1200
2347
import doctest
1201
doctest.testmod()
1202
sys.exit()
2348
fail_count, test_count = doctest.testmod()
2349
sys.exit(os.EX_OK if fail_count == 0 else 1)
1203
2350
1204
2351
# Default values for config file for server-global settings
1205
server_defaults = { u"interface": u"",
1206
u"address": u"",
1207
u"port": u"",
1208
u"debug": u"False",
1209
u"priority":
1210
u"SECURE256:!CTYPE-X.509:+CTYPE-OPENPGP",
1211
u"servicename": u"Mandos",
1212
u"use_dbus": u"True",
1213
u"use_ipv6": u"True",
2352
server_defaults = { "interface": "",
2353
"address": "",
2354
"port": "",
2355
"debug": "False",
2356
"priority":
2357
"SECURE256:!CTYPE-X.509:+CTYPE-OPENPGP:+SIGN-RSA-SHA224:+SIGN-RSA-RMD160",
2358
"servicename": "Mandos",
2359
"use_dbus": "True",
2360
"use_ipv6": "True",
2361
"debuglevel": "",
2362
"restore": "True",
2363
"socket": "",
2364
"statedir": "/var/lib/mandos",
2365
"foreground": "False",
1214
2366
}
1215
2367
1216
2368
# Parse config file for server-global settings
1217
2369
server_config = configparser.SafeConfigParser(server_defaults)
1218
2370
del server_defaults
1219
2371
server_config.read(os.path.join(options.configdir,
1220
u"mandos.conf"))
2372
"mandos.conf"))
1221
2373
# Convert the SafeConfigParser object to a dict
1222
2374
server_settings = server_config.defaults()
1223
2375
# Use the appropriate methods on the non-string config options
1224
for option in (u"debug", u"use_dbus", u"use_ipv6"):
1225
server_settings[option] = server_config.getboolean(u"DEFAULT",
2376
for option in ("debug", "use_dbus", "use_ipv6", "foreground"):
2377
server_settings[option] = server_config.getboolean("DEFAULT",
1226
2378
option)
1227
2379
if server_settings["port"]:
1228
server_settings["port"] = server_config.getint(u"DEFAULT",
1229
u"port")
2380
server_settings["port"] = server_config.getint("DEFAULT",
2381
"port")
2382
if server_settings["socket"]:
2383
server_settings["socket"] = server_config.getint("DEFAULT",
2384
"socket")
2385
# Later, stdin will, and stdout and stderr might, be dup'ed
2386
# over with an opened os.devnull. But we don't want this to
2387
# happen with a supplied network socket.
2388
if 0 <= server_settings["socket"] <= 2:
2389
server_settings["socket"] = os.dup(server_settings
2390
["socket"])
1230
2391
del server_config
1231
2392
1232
2393
# Override the settings from the config file with command line
1233
2394
# options, if set.
1234
for option in (u"interface", u"address", u"port", u"debug",
1235
u"priority", u"servicename", u"configdir",
1236
u"use_dbus", u"use_ipv6"):
2395
for option in ("interface", "address", "port", "debug",
2396
"priority", "servicename", "configdir",
2397
"use_dbus", "use_ipv6", "debuglevel", "restore",
2398
"statedir", "socket", "foreground"):
1237
2399
value = getattr(options, option)
1238
2400
if value is not None:
1239
2401
server_settings[option] = value
1242
2404
for option in server_settings.keys():
1243
2405
if type(server_settings[option]) is str:
1244
2406
server_settings[option] = unicode(server_settings[option])
2407
# Force all boolean options to be boolean
2408
for option in ("debug", "use_dbus", "use_ipv6", "restore",
2409
"foreground"):
2410
server_settings[option] = bool(server_settings[option])
2411
# Debug implies foreground
2412
if server_settings["debug"]:
2413
server_settings["foreground"] = True
1245
2414
# Now we have our good server settings in "server_settings"
1246
2415
1247
2416
##################################################################
1248
2417
1249
2418
# For convenience
1250
debug = server_settings[u"debug"]
1251
use_dbus = server_settings[u"use_dbus"]
1252
use_ipv6 = server_settings[u"use_ipv6"]
1253
1254
if not debug:
1255
syslogger.setLevel(logging.WARNING)
1256
console.setLevel(logging.WARNING)
1257
1258
if server_settings[u"servicename"] != u"Mandos":
2419
debug = server_settings["debug"]
2420
debuglevel = server_settings["debuglevel"]
2421
use_dbus = server_settings["use_dbus"]
2422
use_ipv6 = server_settings["use_ipv6"]
2423
stored_state_path = os.path.join(server_settings["statedir"],
2424
stored_state_file)
2425
foreground = server_settings["foreground"]
2426
2427
if debug:
2428
initlogger(debug, logging.DEBUG)
2429
else:
2430
if not debuglevel:
2431
initlogger(debug)
2432
else:
2433
level = getattr(logging, debuglevel.upper())
2434
initlogger(debug, level)
2435
2436
if server_settings["servicename"] != "Mandos":
1259
2437
syslogger.setFormatter(logging.Formatter
1260
(u'Mandos (%s) [%%(process)d]:'
1261
u' %%(levelname)s: %%(message)s'
1262
% server_settings[u"servicename"]))
2438
('Mandos ({0}) [%(process)d]:'
2439
' %(levelname)s: %(message)s'
2440
.format(server_settings
2441
["servicename"])))
1263
2442
1264
2443
# Parse config file with clients
1265
client_defaults = { u"timeout": u"1h",
1266
u"interval": u"5m",
1267
u"checker": u"fping -q -- %%(host)s",
1268
u"host": u"",
1269
}
1270
client_config = configparser.SafeConfigParser(client_defaults)
1271
client_config.read(os.path.join(server_settings[u"configdir"],
1272
u"clients.conf"))
2444
client_config = configparser.SafeConfigParser(Client
2445
.client_defaults)
2446
client_config.read(os.path.join(server_settings["configdir"],
2447
"clients.conf"))
1273
2448
1274
2449
global mandos_dbus_service
1275
2450
mandos_dbus_service = None
1276
2451
1277
clients = set()
1278
tcp_server = MandosServer((server_settings[u"address"],
1279
server_settings[u"port"]),
2452
tcp_server = MandosServer((server_settings["address"],
2453
server_settings["port"]),
1280
2454
ClientHandler,
1281
interface=server_settings[u"interface"],
2455
interface=(server_settings["interface"]
2456
or None),
1282
2457
use_ipv6=use_ipv6,
1283
clients=clients,
1284
2458
gnutls_priority=
1285
server_settings[u"priority"],
1286
use_dbus=use_dbus)
1287
pidfilename = u"/var/run/mandos.pid"
1288
try:
1289
pidfile = open(pidfilename, u"w")
1290
except IOError:
1291
logger.error(u"Could not open file %r", pidfilename)
2459
server_settings["priority"],
2460
use_dbus=use_dbus,
2461
socketfd=(server_settings["socket"]
2462
or None))
2463
if not foreground:
2464
pidfilename = "/run/mandos.pid"
2465
if not os.path.isdir("/run/."):
2466
pidfilename = "/var/run/mandos.pid"
2467
pidfile = None
2468
try:
2469
pidfile = open(pidfilename, "w")
2470
except IOError as e:
2471
logger.error("Could not open file %r", pidfilename,
2472
exc_info=e)
1292
2473
1293
try:
1294
uid = pwd.getpwnam(u"_mandos").pw_uid
1295
gid = pwd.getpwnam(u"_mandos").pw_gid
1296
except KeyError:
2474
for name in ("_mandos", "mandos", "nobody"):
1297
2475
try:
1298
uid = pwd.getpwnam(u"mandos").pw_uid
1299
gid = pwd.getpwnam(u"mandos").pw_gid
2476
uid = pwd.getpwnam(name).pw_uid
2477
gid = pwd.getpwnam(name).pw_gid
2478
break
1300
2479
except KeyError:
1301
try:
1302
uid = pwd.getpwnam(u"nobody").pw_uid
1303
gid = pwd.getpwnam(u"nobody").pw_gid
1304
except KeyError:
1305
uid = 65534
1306
gid = 65534
2480
continue
2481
else:
2482
uid = 65534
2483
gid = 65534
1307
2484
try:
1308
2485
os.setgid(gid)
1309
2486
os.setuid(uid)
1310
except OSError, error:
1311
if error[0] != errno.EPERM:
1312
raise error
2487
except OSError as error:
2488
if error.errno != errno.EPERM:
2489
raise
1313
2490
1314
# Enable all possible GnuTLS debugging
1315
2491
if debug:
2492
# Enable all possible GnuTLS debugging
2493
1316
2494
# "Use a log level over 10 to enable all debugging options."
1317
2495
# - GnuTLS manual
1318
2496
gnutls.library.functions.gnutls_global_set_log_level(11)
1319
2497
1320
2498
@gnutls.library.types.gnutls_log_func
1321
2499
def debug_gnutls(level, string):
1322
logger.debug(u"GnuTLS: %s", string[:-1])
2500
logger.debug("GnuTLS: %s", string[:-1])
1323
2501
1324
2502
(gnutls.library.functions
1325
2503
.gnutls_global_set_log_function(debug_gnutls))
2504
2505
# Redirect stdin so all checkers get /dev/null
2506
null = os.open(os.devnull, os.O_NOCTTY | os.O_RDWR)
2507
os.dup2(null, sys.stdin.fileno())
2508
if null > 2:
2509
os.close(null)
2510
2511
# Need to fork before connecting to D-Bus
2512
if not foreground:
2513
# Close all input and output, do double fork, etc.
2514
daemon()
2515
2516
# multiprocessing will use threads, so before we use gobject we
2517
# need to inform gobject that threads will be used.
2518
gobject.threads_init()
1326
2519
1327
2520
global main_loop
1328
2521
# From the Avahi example code
1329
DBusGMainLoop(set_as_default=True )
2522
DBusGMainLoop(set_as_default=True)
1330
2523
main_loop = gobject.MainLoop()
1331
2524
bus = dbus.SystemBus()
1332
2525
# End of Avahi example code
1333
2526
if use_dbus:
1334
bus_name = dbus.service.BusName(u"se.bsnet.fukt.Mandos", bus)
2527
try:
2528
bus_name = dbus.service.BusName("se.recompile.Mandos",
2529
bus, do_not_queue=True)
2530
old_bus_name = (dbus.service.BusName
2531
("se.bsnet.fukt.Mandos", bus,
2532
do_not_queue=True))
2533
except dbus.exceptions.NameExistsException as e:
2534
logger.error("Disabling D-Bus:", exc_info=e)
2535
use_dbus = False
2536
server_settings["use_dbus"] = False
2537
tcp_server.use_dbus = False
1335
2538
protocol = avahi.PROTO_INET6 if use_ipv6 else avahi.PROTO_INET
1336
service = AvahiService(name = server_settings[u"servicename"],
1337
servicetype = u"_mandos._tcp",
1338
protocol = protocol, bus = bus)
2539
service = AvahiServiceToSyslog(name =
2540
server_settings["servicename"],
2541
servicetype = "_mandos._tcp",
2542
protocol = protocol, bus = bus)
1339
2543
if server_settings["interface"]:
1340
2544
service.interface = (if_nametoindex
1341
(str(server_settings[u"interface"])))
2545
(str(server_settings["interface"])))
2546
2547
global multiprocessing_manager
2548
multiprocessing_manager = multiprocessing.Manager()
1342
2549
1343
2550
client_class = Client
1344
2551
if use_dbus:
1345
2552
client_class = functools.partial(ClientDBus, bus = bus)
1346
clients.update(set(
1347
client_class(name = section,
1348
config= dict(client_config.items(section)))
1349
for section in client_config.sections()))
1350
if not clients:
1351
logger.warning(u"No clients defined")
1352
1353
if debug:
1354
# Redirect stdin so all checkers get /dev/null
1355
null = os.open(os.path.devnull, os.O_NOCTTY | os.O_RDWR)
1356
os.dup2(null, sys.stdin.fileno())
1357
if null > 2:
1358
os.close(null)
1359
else:
1360
# No console logging
1361
logger.removeHandler(console)
1362
# Close all input and output, do double fork, etc.
1363
daemon()
1364
1365
try:
1366
with closing(pidfile):
1367
pid = os.getpid()
1368
pidfile.write(str(pid) + "\n")
2553
2554
client_settings = Client.config_parser(client_config)
2555
old_client_settings = {}
2556
clients_data = {}
2557
2558
# This is used to redirect stdout and stderr for checker processes
2559
global wnull
2560
wnull = open(os.devnull, "w") # A writable /dev/null
2561
# Only used if server is running in foreground but not in debug
2562
# mode
2563
if debug or not foreground:
2564
wnull.close()
2565
2566
# Get client data and settings from last running state.
2567
if server_settings["restore"]:
2568
try:
2569
with open(stored_state_path, "rb") as stored_state:
2570
clients_data, old_client_settings = (pickle.load
2571
(stored_state))
2572
os.remove(stored_state_path)
2573
except IOError as e:
2574
if e.errno == errno.ENOENT:
2575
logger.warning("Could not load persistent state: {0}"
2576
.format(os.strerror(e.errno)))
2577
else:
2578
logger.critical("Could not load persistent state:",
2579
exc_info=e)
2580
raise
2581
except EOFError as e:
2582
logger.warning("Could not load persistent state: "
2583
"EOFError:", exc_info=e)
2584
2585
with PGPEngine() as pgp:
2586
for client_name, client in clients_data.iteritems():
2587
# Skip removed clients
2588
if client_name not in client_settings:
2589
continue
2590
2591
# Decide which value to use after restoring saved state.
2592
# We have three different values: Old config file,
2593
# new config file, and saved state.
2594
# New config value takes precedence if it differs from old
2595
# config value, otherwise use saved state.
2596
for name, value in client_settings[client_name].items():
2597
try:
2598
# For each value in new config, check if it
2599
# differs from the old config value (Except for
2600
# the "secret" attribute)
2601
if (name != "secret" and
2602
value != old_client_settings[client_name]
2603
[name]):
2604
client[name] = value
2605
except KeyError:
2606
pass
2607
2608
# Clients who has passed its expire date can still be
2609
# enabled if its last checker was successful. Clients
2610
# whose checker succeeded before we stored its state is
2611
# assumed to have successfully run all checkers during
2612
# downtime.
2613
if client["enabled"]:
2614
if datetime.datetime.utcnow() >= client["expires"]:
2615
if not client["last_checked_ok"]:
2616
logger.warning(
2617
"disabling client {0} - Client never "
2618
"performed a successful checker"
2619
.format(client_name))
2620
client["enabled"] = False
2621
elif client["last_checker_status"] != 0:
2622
logger.warning(
2623
"disabling client {0} - Client "
2624
"last checker failed with error code {1}"
2625
.format(client_name,
2626
client["last_checker_status"]))
2627
client["enabled"] = False
2628
else:
2629
client["expires"] = (datetime.datetime
2630
.utcnow()
2631
+ client["timeout"])
2632
logger.debug("Last checker succeeded,"
2633
" keeping {0} enabled"
2634
.format(client_name))
2635
try:
2636
client["secret"] = (
2637
pgp.decrypt(client["encrypted_secret"],
2638
client_settings[client_name]
2639
["secret"]))
2640
except PGPError:
2641
# If decryption fails, we use secret from new settings
2642
logger.debug("Failed to decrypt {0} old secret"
2643
.format(client_name))
2644
client["secret"] = (
2645
client_settings[client_name]["secret"])
2646
2647
# Add/remove clients based on new changes made to config
2648
for client_name in (set(old_client_settings)
2649
- set(client_settings)):
2650
del clients_data[client_name]
2651
for client_name in (set(client_settings)
2652
- set(old_client_settings)):
2653
clients_data[client_name] = client_settings[client_name]
2654
2655
# Create all client objects
2656
for client_name, client in clients_data.iteritems():
2657
tcp_server.clients[client_name] = client_class(
2658
name = client_name, settings = client,
2659
server_settings = server_settings)
2660
2661
if not tcp_server.clients:
2662
logger.warning("No clients defined")
2663
2664
if not foreground:
2665
if pidfile is not None:
2666
try:
2667
with pidfile:
2668
pid = os.getpid()
2669
pidfile.write(str(pid) + "\n".encode("utf-8"))
2670
except IOError:
2671
logger.error("Could not write to file %r with PID %d",
2672
pidfilename, pid)
1369
2673
del pidfile
1370
except IOError:
1371
logger.error(u"Could not write to file %r with PID %d",
1372
pidfilename, pid)
1373
except NameError:
1374
# "pidfile" was never created
1375
pass
1376
del pidfilename
1377
1378
def cleanup():
1379
"Cleanup function; run on exit"
1380
service.cleanup()
1381
1382
while clients:
1383
client = clients.pop()
1384
client.disable_hook = None
1385
client.disable()
1386
1387
atexit.register(cleanup)
1388
1389
if not debug:
1390
signal.signal(signal.SIGINT, signal.SIG_IGN)
2674
del pidfilename
2675
1391
2676
signal.signal(signal.SIGHUP, lambda signum, frame: sys.exit())
1392
2677
signal.signal(signal.SIGTERM, lambda signum, frame: sys.exit())
1393
2678
1394
2679
if use_dbus:
1395
class MandosDBusService(dbus.service.Object):
2680
@alternate_dbus_interfaces({"se.recompile.Mandos":
2681
"se.bsnet.fukt.Mandos"})
2682
class MandosDBusService(DBusObjectWithProperties):
1396
2683
"""A D-Bus proxy object"""
1397
2684
def __init__(self):
1398
dbus.service.Object.__init__(self, bus, u"/")
1399
_interface = u"se.bsnet.fukt.Mandos"
1400
1401
@dbus.service.signal(_interface, signature=u"oa{sv}")
1402
def ClientAdded(self, objpath, properties):
1403
"D-Bus signal"
1404
pass
1405
1406
@dbus.service.signal(_interface, signature=u"s")
1407
def ClientNotFound(self, fingerprint):
1408
"D-Bus signal"
1409
pass
1410
1411
@dbus.service.signal(_interface, signature=u"os")
2685
dbus.service.Object.__init__(self, bus, "/")
2686
_interface = "se.recompile.Mandos"
2687
2688
@dbus_interface_annotations(_interface)
2689
def _foo(self):
2690
return { "org.freedesktop.DBus.Property"
2691
".EmitsChangedSignal":
2692
"false"}
2693
2694
@dbus.service.signal(_interface, signature="o")
2695
def ClientAdded(self, objpath):
2696
"D-Bus signal"
2697
pass
2698
2699
@dbus.service.signal(_interface, signature="ss")
2700
def ClientNotFound(self, fingerprint, address):
2701
"D-Bus signal"
2702
pass
2703
2704
@dbus.service.signal(_interface, signature="os")
1412
2705
def ClientRemoved(self, objpath, name):
1413
2706
"D-Bus signal"
1414
2707
pass
1415
2708
1416
@dbus.service.method(_interface, out_signature=u"ao")
2709
@dbus.service.method(_interface, out_signature="ao")
1417
2710
def GetAllClients(self):
1418
2711
"D-Bus method"
1419
return dbus.Array(c.dbus_object_path for c in clients)
2712
return dbus.Array(c.dbus_object_path
2713
for c in
2714
tcp_server.clients.itervalues())
1420
2715
1421
2716
@dbus.service.method(_interface,
1422
out_signature=u"a{oa{sv}}")
2717
out_signature="a{oa{sv}}")
1423
2718
def GetAllClientsWithProperties(self):
1424
2719
"D-Bus method"
1425
2720
return dbus.Dictionary(
1426
((c.dbus_object_path, c.GetAllProperties())
1427
for c in clients),
1428
signature=u"oa{sv}")
2721
((c.dbus_object_path, c.GetAll(""))
2722
for c in tcp_server.clients.itervalues()),
2723
signature="oa{sv}")
1429
2724
1430
@dbus.service.method(_interface, in_signature=u"o")
2725
@dbus.service.method(_interface, in_signature="o")
1431
2726
def RemoveClient(self, object_path):
1432
2727
"D-Bus method"
1433
for c in clients:
2728
for c in tcp_server.clients.itervalues():
1434
2729
if c.dbus_object_path == object_path:
1435
clients.remove(c)
2730
del tcp_server.clients[c.name]
1436
2731
c.remove_from_connection()
1437
2732
# Don't signal anything except ClientRemoved
1438
c.disable(signal=False)
2733
c.disable(quiet=True)
1439
2734
# Emit D-Bus signal
1440
2735
self.ClientRemoved(object_path, c.name)
1441
2736
return
1442
raise KeyError
2737
raise KeyError(object_path)
1443
2738
1444
2739
del _interface
1445
2740
1446
2741
mandos_dbus_service = MandosDBusService()
1447
2742
1448
for client in clients:
2743
def cleanup():
2744
"Cleanup function; run on exit"
2745
service.cleanup()
2746
2747
multiprocessing.active_children()
2748
wnull.close()
2749
if not (tcp_server.clients or client_settings):
2750
return
2751
2752
# Store client before exiting. Secrets are encrypted with key
2753
# based on what config file has. If config file is
2754
# removed/edited, old secret will thus be unrecovable.
2755
clients = {}
2756
with PGPEngine() as pgp:
2757
for client in tcp_server.clients.itervalues():
2758
key = client_settings[client.name]["secret"]
2759
client.encrypted_secret = pgp.encrypt(client.secret,
2760
key)
2761
client_dict = {}
2762
2763
# A list of attributes that can not be pickled
2764
# + secret.
2765
exclude = set(("bus", "changedstate", "secret",
2766
"checker", "server_settings"))
2767
for name, typ in (inspect.getmembers
2768
(dbus.service.Object)):
2769
exclude.add(name)
2770
2771
client_dict["encrypted_secret"] = (client
2772
.encrypted_secret)
2773
for attr in client.client_structure:
2774
if attr not in exclude:
2775
client_dict[attr] = getattr(client, attr)
2776
2777
clients[client.name] = client_dict
2778
del client_settings[client.name]["secret"]
2779
2780
try:
2781
with (tempfile.NamedTemporaryFile
2782
(mode='wb', suffix=".pickle", prefix='clients-',
2783
dir=os.path.dirname(stored_state_path),
2784
delete=False)) as stored_state:
2785
pickle.dump((clients, client_settings), stored_state)
2786
tempname=stored_state.name
2787
os.rename(tempname, stored_state_path)
2788
except (IOError, OSError) as e:
2789
if not debug:
2790
try:
2791
os.remove(tempname)
2792
except NameError:
2793
pass
2794
if e.errno in (errno.ENOENT, errno.EACCES, errno.EEXIST):
2795
logger.warning("Could not save persistent state: {0}"
2796
.format(os.strerror(e.errno)))
2797
else:
2798
logger.warning("Could not save persistent state:",
2799
exc_info=e)
2800
raise
2801
2802
# Delete all clients, and settings from config
2803
while tcp_server.clients:
2804
name, client = tcp_server.clients.popitem()
2805
if use_dbus:
2806
client.remove_from_connection()
2807
# Don't signal anything except ClientRemoved
2808
client.disable(quiet=True)
2809
if use_dbus:
2810
# Emit D-Bus signal
2811
mandos_dbus_service.ClientRemoved(client
2812
.dbus_object_path,
2813
client.name)
2814
client_settings.clear()
2815
2816
atexit.register(cleanup)
2817
2818
for client in tcp_server.clients.itervalues():
1449
2819
if use_dbus:
1450
2820
# Emit D-Bus signal
1451
mandos_dbus_service.ClientAdded(client.dbus_object_path,
1452
client.GetAllProperties())
1453
client.enable()
2821
mandos_dbus_service.ClientAdded(client.dbus_object_path)
2822
# Need to initiate checking of clients
2823
if client.enabled:
2824
client.init_checker()
1454
2825
1455
2826
tcp_server.enable()
1456
2827
tcp_server.server_activate()
1458
2829
# Find out what port we got
1459
2830
service.port = tcp_server.socket.getsockname()[1]
1460
2831
if use_ipv6:
1461
logger.info(u"Now listening on address %r, port %d,"
1462
" flowinfo %d, scope_id %d"
1463
% tcp_server.socket.getsockname())
2832
logger.info("Now listening on address %r, port %d,"
2833
" flowinfo %d, scope_id %d",
2834
*tcp_server.socket.getsockname())
1464
2835
else: # IPv4
1465
logger.info(u"Now listening on address %r, port %d"
1466
% tcp_server.socket.getsockname())
2836
logger.info("Now listening on address %r, port %d",
2837
*tcp_server.socket.getsockname())
1467
2838
1468
2839
#service.interface = tcp_server.socket.getsockname()[3]
1469
2840
1471
2842
# From the Avahi example code
1472
2843
try:
1473
2844
service.activate()
1474
except dbus.exceptions.DBusException, error:
1475
logger.critical(u"DBusException: %s", error)
2845
except dbus.exceptions.DBusException as error:
2846
logger.critical("D-Bus Exception", exc_info=error)
2847
cleanup()
1476
2848
sys.exit(1)
1477
2849
# End of Avahi example code
1478
2850
1481
2853
(tcp_server.handle_request
1482
2854
(*args[2:], **kwargs) or True))
1483
2855
1484
logger.debug(u"Starting main loop")
2856
logger.debug("Starting main loop")
1485
2857
main_loop.run()
1486
except AvahiError, error:
1487
logger.critical(u"AvahiError: %s", error)
2858
except AvahiError as error:
2859
logger.critical("Avahi Error", exc_info=error)
2860
cleanup()
1488
2861
sys.exit(1)
1489
2862
except KeyboardInterrupt:
1490
2863
if debug:
1491
print >> sys.stderr
1492
logger.debug(u"Server received KeyboardInterrupt")
1493
logger.debug(u"Server exiting")
2864
print("", file=sys.stderr)
2865
logger.debug("Server received KeyboardInterrupt")
2866
logger.debug("Server exiting")
2867
# Must run before the D-Bus bus name gets deregistered
2868
cleanup()
1494
2869
1495
2870
if __name__ == '__main__':
1496
2871
main()
Loggerhead is a web-based interface for Breezy
Version: 2.0.2.dev0