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- Committer: Teddy Hogeborn
- Date: 2011-08-08 21:12:37 UTC
- Revision ID: teddy@fukt.bsnet.se-20110808211237-jejsz5brjytrjot8
* Makefile (DOCS): Added "intro.8mandos".
(intro.8mandos, intro.8mandos.xhtml): New.
* README: Replaced text with link, reference and short summary.
* intro.xml: New.
* mandos-clients.conf.xml (SEE ALSO): Added "intro(8mandos)".
* mandos-ctl.xml (SEE ALSO): - '' -
* mandos-keygen.xml (SEE ALSO): - '' -
* mandos-monitor.xml (SEE ALSO): - '' -
* mandos.conf.xml (SEE ALSO): - '' -
* mandos.xml (SEE ALSO): - '' -
* plugin-runner.xml (SEE ALSO): - '' -
* plugins.d/askpass-fifo.xml (SEE ALSO): - '' -
* plugins.d/mandos-client.xml (SEE ALSO): - '' -
* plugins.d/password-prompt.xml (SEE ALSO): - '' -
* plugins.d/plymouth.xml (SEE ALSO): - '' -
* plugins.d/splashy.xml (SEE ALSO): - '' -
* plugins.d/usplash.xml (SEE ALSO): - '' -
(intro.8mandos, intro.8mandos.xhtml): New.
* README: Replaced text with link, reference and short summary.
* intro.xml: New.
* mandos-clients.conf.xml (SEE ALSO): Added "intro(8mandos)".
* mandos-ctl.xml (SEE ALSO): - '' -
* mandos-keygen.xml (SEE ALSO): - '' -
* mandos-monitor.xml (SEE ALSO): - '' -
* mandos.conf.xml (SEE ALSO): - '' -
* mandos.xml (SEE ALSO): - '' -
* plugin-runner.xml (SEE ALSO): - '' -
* plugins.d/askpass-fifo.xml (SEE ALSO): - '' -
* plugins.d/mandos-client.xml (SEE ALSO): - '' -
* plugins.d/password-prompt.xml (SEE ALSO): - '' -
* plugins.d/plymouth.xml (SEE ALSO): - '' -
* plugins.d/splashy.xml (SEE ALSO): - '' -
* plugins.d/usplash.xml (SEE ALSO): - '' -
- files removed:
- debian/mandos-client.examples
- debian/upstream
- network-hooks.d
- files modified:
- .bzrignore
added
removed
mandos
1
#!/usr/bin/python2.7
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#!/usr/bin/python
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# -*- mode: python; coding: utf-8 -*-
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#
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# Mandos server - give out binary blobs to connecting clients.
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# "AvahiService" class, and some lines in "main".
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#
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# Everything else is
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# Copyright © 2008-2014 Teddy Hogeborn
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# Copyright © 2008-2014 Björn Påhlsson
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# Copyright © 2008-2011 Teddy Hogeborn
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# Copyright © 2008-2011 Björn Påhlsson
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#
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# This program is free software: you can redistribute it and/or modify
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# it under the terms of the GNU General Public License as published by
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# along with this program. If not, see
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# <http://www.gnu.org/licenses/>.
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#
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# Contact the authors at <mandos@recompile.se>.
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# Contact the authors at <mandos@fukt.bsnet.se>.
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#
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from __future__ import (division, absolute_import, print_function,
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unicode_literals)
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from future_builtins import *
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import SocketServer as socketserver
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import socket
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import argparse
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import functools
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import cPickle as pickle
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import multiprocessing
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import types
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import binascii
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import tempfile
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import itertools
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import collections
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65
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import dbus
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import dbus.service
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except ImportError:
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SO_BINDTODEVICE = None
90
83
91
if sys.version_info.major == 2:
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str = unicode
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version = "1.6.9"
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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
102
(ctypes.util.find_library("c"))
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.if_nametoindex)
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except (OSError, AttributeError):
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def if_nametoindex(interface):
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"Get an interface index the hard way, i.e. using fcntl()"
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SIOCGIFINDEX = 0x8933 # From /usr/include/linux/sockios.h
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with contextlib.closing(socket.socket()) as s:
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ifreq = fcntl.ioctl(s, SIOCGIFINDEX,
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struct.pack(b"16s16x", interface))
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interface_index = struct.unpack("I", ifreq[16:20])[0]
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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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global syslogger
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syslogger = (logging.handlers.SysLogHandler
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(facility =
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logging.handlers.SysLogHandler.LOG_DAEMON,
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address = "/dev/log"))
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syslogger.setFormatter(logging.Formatter
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('Mandos [%(process)d]: %(levelname)s:'
125
' %(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):
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return self
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def __exit__(self, exc_type, exc_value, traceback):
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self._cleanup()
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return False
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def __del__(self):
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self._cleanup()
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def _cleanup(self):
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if self.tempdir is not None:
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# Delete contents of tempdir
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for root, dirs, files in os.walk(self.tempdir,
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topdown = False):
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for filename in files:
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os.remove(os.path.join(root, filename))
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for dirname in dirs:
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os.rmdir(os.path.join(root, dirname))
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# Remove tempdir
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os.rmdir(self.tempdir)
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self.tempdir = None
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def password_encode(self, password):
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# Passphrase can not be empty and can not contain newlines or
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# NUL bytes. So we prefix it and hex encode it.
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encoded = b"mandos" + binascii.hexlify(password)
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if len(encoded) > 2048:
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# GnuPG can't handle long passwords, so encode differently
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encoded = (b"mandos" + password.replace(b"\\", b"\\\\")
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.replace(b"\n", b"\\n")
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.replace(b"\0", b"\\x00"))
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return encoded
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def encrypt(self, data, password):
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passphrase = self.password_encode(password)
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with tempfile.NamedTemporaryFile(dir=self.tempdir
190
) as passfile:
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passfile.write(passphrase)
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passfile.flush()
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proc = subprocess.Popen(['gpg', '--symmetric',
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'--passphrase-file',
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passfile.name]
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+ 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)
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if proc.returncode != 0:
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raise PGPError(err)
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return ciphertext
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def decrypt(self, data, password):
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passphrase = self.password_encode(password)
207
with tempfile.NamedTemporaryFile(dir = self.tempdir
208
) as passfile:
209
passfile.write(passphrase)
210
passfile.flush()
211
proc = subprocess.Popen(['gpg', '--decrypt',
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'--passphrase-file',
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passfile.name]
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+ self.gnupgargs,
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stdin = subprocess.PIPE,
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stdout = subprocess.PIPE,
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stderr = subprocess.PIPE)
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decrypted_plaintext, err = proc.communicate(input
219
= data)
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if proc.returncode != 0:
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raise PGPError(err)
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return decrypted_plaintext
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version = "1.3.1"
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#logger = logging.getLogger('mandos')
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logger = logging.Logger('mandos')
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syslogger = (logging.handlers.SysLogHandler
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(facility = 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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console = logging.StreamHandler()
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console.setFormatter(logging.Formatter('%(name)s [%(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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class AvahiError(Exception):
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def __init__(self, value, *args, **kwargs):
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self.value = value
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return super(AvahiError, self).__init__(value, *args,
229
**kwargs)
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super(AvahiError, self).__init__(value, *args, **kwargs)
107
def __unicode__(self):
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return unicode(repr(self.value))
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class AvahiServiceError(AvahiError):
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pass
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Used to optionally bind to the specified interface.
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name: string; Example: 'Mandos'
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type: string; Example: '_mandos._tcp'.
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See <https://www.iana.org/assignments/service-names-port-numbers>
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See <http://www.dns-sd.org/ServiceTypes.html>
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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 = "", host = "", max_renames = 32768,
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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, remove=True):
155
def rename(self):
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"""Derived from the Avahi example code"""
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if self.rename_count >= self.max_renames:
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logger.critical("No suitable Zeroconf service name found"
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" after %i retries, exiting.",
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self.rename_count)
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raise AvahiServiceError("Too many renames")
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self.name = str(self.server
286
.GetAlternativeServiceName(self.name))
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self.rename_count += 1
162
self.name = unicode(self.server.GetAlternativeServiceName(self.name))
288
163
logger.info("Changing Zeroconf service name to %r ...",
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self.name)
290
if remove:
291
self.remove()
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syslogger.setFormatter(logging.Formatter
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('Mandos (%s) [%%(process)d]:'
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' %%(levelname)s: %%(message)s'
168
% self.name))
169
self.remove()
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try:
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self.add()
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except dbus.exceptions.DBusException as error:
295
if (error.get_dbus_name()
296
== "org.freedesktop.Avahi.CollisionError"):
297
logger.info("Local Zeroconf service name collision.")
298
return self.rename(remove=False)
299
else:
300
logger.critical("D-Bus Exception", exc_info=error)
301
self.cleanup()
302
os._exit(1)
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173
logger.critical("DBusException: %s", error)
174
self.cleanup()
175
os._exit(1)
176
self.rename_count += 1
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177
def remove(self):
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"""Derived from the Avahi example code"""
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179
if self.entry_group_state_changed_match is not None:
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self.entry_group_state_changed_match = None
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if self.group is not None:
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self.group.Reset()
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def add(self):
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"""Derived from the Avahi example code"""
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self.remove()
319
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avahi.DBUS_INTERFACE_ENTRY_GROUP)
320
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self.entry_group_state_changed_match = (
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self.group.connect_to_signal(
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'StateChanged', self.entry_group_state_changed))
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'StateChanged', self .entry_group_state_changed))
323
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logger.debug("Adding Zeroconf service '%s' of type '%s' ...",
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self.name, self.type)
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self.group.AddService(
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dbus.UInt16(self.port),
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avahi.string_array_to_txt_array(self.TXT))
333
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self.group.Commit()
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def entry_group_state_changed(self, state, error):
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207
"""Derived from the Avahi example code"""
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208
logger.debug("Avahi entry group state change: %i", state)
343
214
self.rename()
344
215
elif state == avahi.ENTRY_GROUP_FAILURE:
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216
logger.critical("Avahi: Error in group state changed %s",
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str(error))
347
raise AvahiGroupError("State changed: {!s}"
348
.format(error))
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unicode(error))
218
raise AvahiGroupError("State changed: %s"
219
% unicode(error))
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def cleanup(self):
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"""Derived from the Avahi example code"""
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if self.group is not None:
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try:
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self.group.Free()
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except (dbus.exceptions.UnknownMethodException,
356
dbus.exceptions.DBusException):
226
dbus.exceptions.DBusException) as e:
357
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pass
358
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self.group = None
359
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self.remove()
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def server_state_changed(self, state, error=None):
362
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"""Derived from the Avahi example code"""
363
232
logger.debug("Avahi server state change: %i", state)
382
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logger.debug("Unknown state: %r", state)
383
252
else:
384
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logger.debug("Unknown state: %r: %r", state, error)
385
386
254
def activate(self):
387
255
"""Derived from the Avahi example code"""
388
256
if self.server is None:
396
264
self.server_state_changed(self.server.GetState())
397
265
398
266
399
class AvahiServiceToSyslog(AvahiService):
400
def rename(self, *args, **kwargs):
401
"""Add the new name to the syslog messages"""
402
ret = AvahiService.rename(self, *args, **kwargs)
403
syslogger.setFormatter(logging.Formatter
404
('Mandos ({}) [%(process)d]:'
405
' %(levelname)s: %(message)s'
406
.format(self.name)))
407
return ret
408
409
410
267
class Client(object):
411
268
"""A representation of a client host served by this server.
412
269
413
270
Attributes:
414
approved: bool(); 'None' if not yet approved/disapproved
271
_approved: bool(); 'None' if not yet approved/disapproved
415
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approval_delay: datetime.timedelta(); Time to wait for approval
416
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approval_duration: datetime.timedelta(); Duration of one approval
417
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checker: subprocess.Popen(); a running checker process used
424
281
instance %(name)s can be used in the command.
425
282
checker_initiator_tag: a gobject event source tag, or None
426
283
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
429
284
current_checker_command: string; current running checker_command
285
disable_hook: If set, called by disable() as disable_hook(self)
430
286
disable_initiator_tag: a gobject event source tag, or None
431
287
enabled: bool()
432
288
fingerprint: string (40 or 32 hexadecimal digits); used to
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291
interval: datetime.timedelta(); How often to start a new checker
436
292
last_approval_request: datetime.datetime(); (UTC) or None
437
293
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
294
last_enabled: datetime.datetime(); (UTC)
442
295
name: string; from the config file, used in log messages and
443
296
D-Bus identifiers
444
297
secret: bytestring; sent verbatim (over TLS) to client
445
298
timeout: datetime.timedelta(); How long from last_checked_ok
446
299
until this client is disabled
447
extended_timeout: extra long timeout when secret has been sent
448
300
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()
452
301
"""
453
302
454
303
runtime_expansions = ("approval_delay", "approval_duration",
455
"created", "enabled", "expires",
456
"fingerprint", "host", "interval",
457
"last_approval_request", "last_checked_ok",
304
"created", "enabled", "fingerprint",
305
"host", "interval", "last_checked_ok",
458
306
"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
}
469
307
470
308
@staticmethod
471
def config_parser(config):
472
"""Construct a new dict of client settings of this form:
473
{ client_name: {setting_name: value, ...}, ...}
474
with exceptions for any special settings as defined above.
475
NOTE: Must be a pure function. Must return the same result
476
value given the same arguments.
477
"""
478
settings = {}
479
for client_name in config.sections():
480
section = dict(config.items(client_name))
481
client = settings[client_name] = {}
482
483
client["host"] = section["host"]
484
# Reformat values from string types to Python types
485
client["approved_by_default"] = config.getboolean(
486
client_name, "approved_by_default")
487
client["enabled"] = config.getboolean(client_name,
488
"enabled")
489
490
# Uppercase and remove spaces from fingerprint for later
491
# comparison purposes with return value from the
492
# fingerprint() function
493
client["fingerprint"] = (section["fingerprint"].upper()
494
.replace(" ", ""))
495
if "secret" in section:
496
client["secret"] = section["secret"].decode("base64")
497
elif "secfile" in section:
498
with open(os.path.expanduser(os.path.expandvars
499
(section["secfile"])),
500
"rb") as secfile:
501
client["secret"] = secfile.read()
502
else:
503
raise TypeError("No secret or secfile for section {}"
504
.format(section))
505
client["timeout"] = string_to_delta(section["timeout"])
506
client["extended_timeout"] = string_to_delta(
507
section["extended_timeout"])
508
client["interval"] = string_to_delta(section["interval"])
509
client["approval_delay"] = string_to_delta(
510
section["approval_delay"])
511
client["approval_duration"] = string_to_delta(
512
section["approval_duration"])
513
client["checker_command"] = section["checker"]
514
client["last_approval_request"] = None
515
client["last_checked_ok"] = None
516
client["last_checker_status"] = -2
517
518
return settings
519
520
def __init__(self, settings, name = None, server_settings=None):
309
def _timedelta_to_milliseconds(td):
310
"Convert a datetime.timedelta() to milliseconds"
311
return ((td.days * 24 * 60 * 60 * 1000)
312
+ (td.seconds * 1000)
313
+ (td.microseconds // 1000))
314
315
def timeout_milliseconds(self):
316
"Return the 'timeout' attribute in milliseconds"
317
return self._timedelta_to_milliseconds(self.timeout)
318
319
def interval_milliseconds(self):
320
"Return the 'interval' attribute in milliseconds"
321
return self._timedelta_to_milliseconds(self.interval)
322
323
def approval_delay_milliseconds(self):
324
return self._timedelta_to_milliseconds(self.approval_delay)
325
326
def __init__(self, name = None, disable_hook=None, config=None):
327
"""Note: the 'checker' key in 'config' sets the
328
'checker_command' attribute and *not* the 'checker'
329
attribute."""
521
330
self.name = name
522
if server_settings is None:
523
server_settings = {}
524
self.server_settings = server_settings
525
# adding all client settings
526
for setting, value in settings.items():
527
setattr(self, setting, value)
528
529
if self.enabled:
530
if not hasattr(self, "last_enabled"):
531
self.last_enabled = datetime.datetime.utcnow()
532
if not hasattr(self, "expires"):
533
self.expires = (datetime.datetime.utcnow()
534
+ self.timeout)
535
else:
536
self.last_enabled = None
537
self.expires = None
538
331
if config is None:
332
config = {}
539
333
logger.debug("Creating client %r", self.name)
334
# Uppercase and remove spaces from fingerprint for later
335
# comparison purposes with return value from the fingerprint()
336
# function
337
self.fingerprint = (config["fingerprint"].upper()
338
.replace(" ", ""))
540
339
logger.debug(" Fingerprint: %s", self.fingerprint)
541
self.created = settings.get("created",
542
datetime.datetime.utcnow())
543
544
# attributes specific for this server instance
340
if "secret" in config:
341
self.secret = config["secret"].decode("base64")
342
elif "secfile" in config:
343
with open(os.path.expanduser(os.path.expandvars
344
(config["secfile"])),
345
"rb") as secfile:
346
self.secret = secfile.read()
347
else:
348
raise TypeError("No secret or secfile for client %s"
349
% self.name)
350
self.host = config.get("host", "")
351
self.created = datetime.datetime.utcnow()
352
self.enabled = False
353
self.last_approval_request = None
354
self.last_enabled = None
355
self.last_checked_ok = None
356
self.timeout = string_to_delta(config["timeout"])
357
self.interval = string_to_delta(config["interval"])
358
self.disable_hook = disable_hook
545
359
self.checker = None
546
360
self.checker_initiator_tag = None
547
361
self.disable_initiator_tag = None
548
362
self.checker_callback_tag = None
363
self.checker_command = config["checker"]
549
364
self.current_checker_command = None
550
self.approved = None
365
self.last_connect = None
366
self._approved = None
367
self.approved_by_default = config.get("approved_by_default",
368
True)
551
369
self.approvals_pending = 0
552
self.changedstate = (multiprocessing_manager
553
.Condition(multiprocessing_manager
554
.Lock()))
555
self.client_structure = [attr for attr in
556
self.__dict__.iterkeys()
557
if not attr.startswith("_")]
558
self.client_structure.append("client_structure")
559
560
for name, t in inspect.getmembers(type(self),
561
lambda obj:
562
isinstance(obj,
563
property)):
564
if not name.startswith("_"):
565
self.client_structure.append(name)
370
self.approval_delay = string_to_delta(
371
config["approval_delay"])
372
self.approval_duration = string_to_delta(
373
config["approval_duration"])
374
self.changedstate = multiprocessing_manager.Condition(multiprocessing_manager.Lock())
566
375
567
# Send notice to process children that client state has changed
568
376
def send_changedstate(self):
569
with self.changedstate:
570
self.changedstate.notify_all()
571
377
self.changedstate.acquire()
378
self.changedstate.notify_all()
379
self.changedstate.release()
380
572
381
def enable(self):
573
382
"""Start this client's checker and timeout hooks"""
574
383
if getattr(self, "enabled", False):
575
384
# Already enabled
576
385
return
577
self.expires = datetime.datetime.utcnow() + self.timeout
578
self.enabled = True
386
self.send_changedstate()
579
387
self.last_enabled = datetime.datetime.utcnow()
580
self.init_checker()
581
self.send_changedstate()
388
# Schedule a new checker to be started an 'interval' from now,
389
# and every interval from then on.
390
self.checker_initiator_tag = (gobject.timeout_add
391
(self.interval_milliseconds(),
392
self.start_checker))
393
# Schedule a disable() when 'timeout' has passed
394
self.disable_initiator_tag = (gobject.timeout_add
395
(self.timeout_milliseconds(),
396
self.disable))
397
self.enabled = True
398
# Also start a new checker *right now*.
399
self.start_checker()
582
400
583
401
def disable(self, quiet=True):
584
402
"""Disable this client."""
585
403
if not getattr(self, "enabled", False):
586
404
return False
587
405
if not quiet:
406
self.send_changedstate()
407
if not quiet:
588
408
logger.info("Disabling client %s", self.name)
589
if getattr(self, "disable_initiator_tag", None) is not None:
409
if getattr(self, "disable_initiator_tag", False):
590
410
gobject.source_remove(self.disable_initiator_tag)
591
411
self.disable_initiator_tag = None
592
self.expires = None
593
if getattr(self, "checker_initiator_tag", None) is not None:
412
if getattr(self, "checker_initiator_tag", False):
594
413
gobject.source_remove(self.checker_initiator_tag)
595
414
self.checker_initiator_tag = None
596
415
self.stop_checker()
416
if self.disable_hook:
417
self.disable_hook(self)
597
418
self.enabled = False
598
if not quiet:
599
self.send_changedstate()
600
419
# Do not run this again if called by a gobject.timeout_add
601
420
return False
602
421
603
422
def __del__(self):
423
self.disable_hook = None
604
424
self.disable()
605
425
606
def init_checker(self):
607
# Schedule a new checker to be started an 'interval' from now,
608
# and every interval from then on.
609
if self.checker_initiator_tag is not None:
610
gobject.source_remove(self.checker_initiator_tag)
611
self.checker_initiator_tag = (gobject.timeout_add
612
(int(self.interval
613
.total_seconds() * 1000),
614
self.start_checker))
615
# Schedule a disable() when 'timeout' has passed
616
if self.disable_initiator_tag is not None:
617
gobject.source_remove(self.disable_initiator_tag)
618
self.disable_initiator_tag = (gobject.timeout_add
619
(int(self.timeout
620
.total_seconds() * 1000),
621
self.disable))
622
# Also start a new checker *right now*.
623
self.start_checker()
624
625
426
def checker_callback(self, pid, condition, command):
626
427
"""The checker has completed, so take appropriate actions."""
627
428
self.checker_callback_tag = None
628
429
self.checker = None
629
430
if os.WIFEXITED(condition):
630
self.last_checker_status = os.WEXITSTATUS(condition)
631
if self.last_checker_status == 0:
431
exitstatus = os.WEXITSTATUS(condition)
432
if exitstatus == 0:
632
433
logger.info("Checker for %(name)s succeeded",
633
434
vars(self))
634
435
self.checked_ok()
636
437
logger.info("Checker for %(name)s failed",
637
438
vars(self))
638
439
else:
639
self.last_checker_status = -1
640
440
logger.warning("Checker for %(name)s crashed?",
641
441
vars(self))
642
442
643
443
def checked_ok(self):
644
"""Assert that the client has been seen, alive and well."""
444
"""Bump up the timeout for this client.
445
446
This should only be called when the client has been seen,
447
alive and well.
448
"""
645
449
self.last_checked_ok = datetime.datetime.utcnow()
646
self.last_checker_status = 0
647
self.bump_timeout()
648
649
def bump_timeout(self, timeout=None):
650
"""Bump up the timeout for this client."""
651
if timeout is None:
652
timeout = self.timeout
653
if self.disable_initiator_tag is not None:
654
gobject.source_remove(self.disable_initiator_tag)
655
self.disable_initiator_tag = None
656
if getattr(self, "enabled", False):
657
self.disable_initiator_tag = (gobject.timeout_add
658
(int(timeout.total_seconds()
659
* 1000), self.disable))
660
self.expires = datetime.datetime.utcnow() + timeout
450
gobject.source_remove(self.disable_initiator_tag)
451
self.disable_initiator_tag = (gobject.timeout_add
452
(self.timeout_milliseconds(),
453
self.disable))
661
454
662
455
def need_approval(self):
663
456
self.last_approval_request = datetime.datetime.utcnow()
668
461
If a checker already exists, leave it running and do
669
462
nothing."""
670
463
# The reason for not killing a running checker is that if we
671
# did that, and if a checker (for some reason) started running
672
# slowly and taking more than 'interval' time, then the client
673
# would inevitably timeout, since no checker would get a
674
# chance to run to completion. If we instead leave running
464
# did that, then if a checker (for some reason) started
465
# running slowly and taking more than 'interval' time, the
466
# client would inevitably timeout, since no checker would get
467
# a chance to run to completion. If we instead leave running
675
468
# checkers alone, the checker would have to take more time
676
469
# than 'timeout' for the client to be disabled, which is as it
677
470
# should be.
679
472
# If a checker exists, make sure it is not a zombie
680
473
try:
681
474
pid, status = os.waitpid(self.checker.pid, os.WNOHANG)
682
except AttributeError:
683
pass
684
except OSError as error:
685
if error.errno != errno.ECHILD:
686
raise
475
except (AttributeError, OSError) as error:
476
if (isinstance(error, OSError)
477
and error.errno != errno.ECHILD):
478
raise error
687
479
else:
688
480
if pid:
689
481
logger.warning("Checker was a zombie")
692
484
self.current_checker_command)
693
485
# Start a new checker if needed
694
486
if self.checker is None:
695
# Escape attributes for the shell
696
escaped_attrs = { attr:
697
re.escape(str(getattr(self, attr)))
698
for attr in self.runtime_expansions }
699
487
try:
700
command = self.checker_command % escaped_attrs
701
except TypeError as error:
702
logger.error('Could not format string "%s"',
703
self.checker_command, exc_info=error)
704
return True # Try again later
488
# In case checker_command has exactly one % operator
489
command = self.checker_command % self.host
490
except TypeError:
491
# Escape attributes for the shell
492
escaped_attrs = dict(
493
(attr,
494
re.escape(unicode(str(getattr(self, attr, "")),
495
errors=
496
'replace')))
497
for attr in
498
self.runtime_expansions)
499
500
try:
501
command = self.checker_command % escaped_attrs
502
except TypeError as error:
503
logger.error('Could not format string "%s":'
504
' %s', self.checker_command, error)
505
return True # Try again later
705
506
self.current_checker_command = command
706
507
try:
707
508
logger.info("Starting checker %r for %s",
710
511
# in normal mode, that is already done by daemon(),
711
512
# and in debug mode we don't want to. (Stdin is
712
513
# always replaced by /dev/null.)
713
# The exception is when not debugging but nevertheless
714
# running in the foreground; use the previously
715
# created wnull.
716
popen_args = {}
717
if (not self.server_settings["debug"]
718
and self.server_settings["foreground"]):
719
popen_args.update({"stdout": wnull,
720
"stderr": wnull })
721
514
self.checker = subprocess.Popen(command,
722
515
close_fds=True,
723
shell=True, cwd="/",
724
**popen_args)
725
except OSError as error:
726
logger.error("Failed to start subprocess",
727
exc_info=error)
728
return True
729
self.checker_callback_tag = (gobject.child_watch_add
730
(self.checker.pid,
731
self.checker_callback,
732
data=command))
733
# The checker may have completed before the gobject
734
# watch was added. Check for this.
735
try:
516
shell=True, cwd="/")
517
self.checker_callback_tag = (gobject.child_watch_add
518
(self.checker.pid,
519
self.checker_callback,
520
data=command))
521
# The checker may have completed before the gobject
522
# watch was added. Check for this.
736
523
pid, status = os.waitpid(self.checker.pid, os.WNOHANG)
524
if pid:
525
gobject.source_remove(self.checker_callback_tag)
526
self.checker_callback(pid, status, command)
737
527
except OSError as error:
738
if error.errno == errno.ECHILD:
739
# This should never happen
740
logger.error("Child process vanished",
741
exc_info=error)
742
return True
743
raise
744
if pid:
745
gobject.source_remove(self.checker_callback_tag)
746
self.checker_callback(pid, status, command)
528
logger.error("Failed to start subprocess: %s",
529
error)
747
530
# Re-run this periodically if run by gobject.timeout_add
748
531
return True
749
532
756
539
return
757
540
logger.debug("Stopping checker for %(name)s", vars(self))
758
541
try:
759
self.checker.terminate()
542
os.kill(self.checker.pid, signal.SIGTERM)
760
543
#time.sleep(0.5)
761
544
#if self.checker.poll() is None:
762
# self.checker.kill()
545
# os.kill(self.checker.pid, signal.SIGKILL)
763
546
except OSError as error:
764
547
if error.errno != errno.ESRCH: # No such process
765
548
raise
766
549
self.checker = None
767
550
768
769
551
def dbus_service_property(dbus_interface, signature="v",
770
552
access="readwrite", byte_arrays=False):
771
553
"""Decorators for marking methods of a DBusObjectWithProperties to
782
564
# "Set" method, so we fail early here:
783
565
if byte_arrays and signature != "ay":
784
566
raise ValueError("Byte arrays not supported for non-'ay'"
785
" signature {!r}".format(signature))
567
" signature %r" % signature)
786
568
def decorator(func):
787
569
func._dbus_is_property = True
788
570
func._dbus_interface = dbus_interface
796
578
return decorator
797
579
798
580
799
def dbus_interface_annotations(dbus_interface):
800
"""Decorator for marking functions returning interface annotations
801
802
Usage:
803
804
@dbus_interface_annotations("org.example.Interface")
805
def _foo(self): # Function name does not matter
806
return {"org.freedesktop.DBus.Deprecated": "true",
807
"org.freedesktop.DBus.Property.EmitsChangedSignal":
808
"false"}
809
"""
810
def decorator(func):
811
func._dbus_is_interface = True
812
func._dbus_interface = dbus_interface
813
func._dbus_name = dbus_interface
814
return func
815
return decorator
816
817
818
def dbus_annotations(annotations):
819
"""Decorator to annotate D-Bus methods, signals or properties
820
Usage:
821
822
@dbus_annotations({"org.freedesktop.DBus.Deprecated": "true",
823
"org.freedesktop.DBus.Property."
824
"EmitsChangedSignal": "false"})
825
@dbus_service_property("org.example.Interface", signature="b",
826
access="r")
827
def Property_dbus_property(self):
828
return dbus.Boolean(False)
829
"""
830
def decorator(func):
831
func._dbus_annotations = annotations
832
return func
833
return decorator
834
835
836
581
class DBusPropertyException(dbus.exceptions.DBusException):
837
582
"""A base class for D-Bus property-related exceptions
838
583
"""
839
pass
584
def __unicode__(self):
585
return unicode(str(self))
586
840
587
841
588
class DBusPropertyAccessException(DBusPropertyException):
842
589
"""A property's access permissions disallows an operation.
852
599
853
600
class DBusObjectWithProperties(dbus.service.Object):
854
601
"""A D-Bus object with properties.
855
602
856
603
Classes inheriting from this can use the dbus_service_property
857
604
decorator to expose methods as D-Bus properties. It exposes the
858
605
standard Get(), Set(), and GetAll() methods on the D-Bus.
859
606
"""
860
607
861
608
@staticmethod
862
def _is_dbus_thing(thing):
863
"""Returns a function testing if an attribute is a D-Bus thing
864
865
If called like _is_dbus_thing("method") it returns a function
866
suitable for use as predicate to inspect.getmembers().
867
"""
868
return lambda obj: getattr(obj, "_dbus_is_{}".format(thing),
869
False)
609
def _is_dbus_property(obj):
610
return getattr(obj, "_dbus_is_property", False)
870
611
871
def _get_all_dbus_things(self, thing):
612
def _get_all_dbus_properties(self):
872
613
"""Returns a generator of (name, attribute) pairs
873
614
"""
874
return ((getattr(athing.__get__(self), "_dbus_name",
875
name),
876
athing.__get__(self))
877
for cls in self.__class__.__mro__
878
for name, athing in
879
inspect.getmembers(cls,
880
self._is_dbus_thing(thing)))
615
return ((prop._dbus_name, prop)
616
for name, prop in
617
inspect.getmembers(self, self._is_dbus_property))
881
618
882
619
def _get_dbus_property(self, interface_name, property_name):
883
620
"""Returns a bound method if one exists which is a D-Bus
884
621
property with the specified name and interface.
885
622
"""
886
for cls in self.__class__.__mro__:
887
for name, value in (inspect.getmembers
888
(cls,
889
self._is_dbus_thing("property"))):
890
if (value._dbus_name == property_name
891
and value._dbus_interface == interface_name):
892
return value.__get__(self)
893
623
for name in (property_name,
624
property_name + "_dbus_property"):
625
prop = getattr(self, name, None)
626
if (prop is None
627
or not self._is_dbus_property(prop)
628
or prop._dbus_name != property_name
629
or (interface_name and prop._dbus_interface
630
and interface_name != prop._dbus_interface)):
631
continue
632
return prop
894
633
# No such property
895
634
raise DBusPropertyNotFound(self.dbus_object_path + ":"
896
635
+ interface_name + "."
920
659
# The byte_arrays option is not supported yet on
921
660
# signatures other than "ay".
922
661
if prop._dbus_signature != "ay":
923
raise ValueError("Byte arrays not supported for non-"
924
"'ay' signature {!r}"
925
.format(prop._dbus_signature))
926
value = dbus.ByteArray(b''.join(chr(byte)
927
for byte in value))
662
raise ValueError
663
value = dbus.ByteArray(''.join(unichr(byte)
664
for byte in value))
928
665
prop(value)
929
666
930
667
@dbus.service.method(dbus.PROPERTIES_IFACE, in_signature="s",
932
669
def GetAll(self, interface_name):
933
670
"""Standard D-Bus property GetAll() method, see D-Bus
934
671
standard.
935
672
936
673
Note: Will not include properties with access="write".
937
674
"""
938
properties = {}
939
for name, prop in self._get_all_dbus_things("property"):
675
all = {}
676
for name, prop in self._get_all_dbus_properties():
940
677
if (interface_name
941
678
and interface_name != prop._dbus_interface):
942
679
# Interface non-empty but did not match
946
683
continue
947
684
value = prop()
948
685
if not hasattr(value, "variant_level"):
949
properties[name] = value
686
all[name] = value
950
687
continue
951
properties[name] = type(value)(value, variant_level=
952
value.variant_level+1)
953
return dbus.Dictionary(properties, signature="sv")
954
955
@dbus.service.signal(dbus.PROPERTIES_IFACE, signature="sa{sv}as")
956
def PropertiesChanged(self, interface_name, changed_properties,
957
invalidated_properties):
958
"""Standard D-Bus PropertiesChanged() signal, see D-Bus
959
standard.
960
"""
961
pass
688
all[name] = type(value)(value, variant_level=
689
value.variant_level+1)
690
return dbus.Dictionary(all, signature="sv")
962
691
963
692
@dbus.service.method(dbus.INTROSPECTABLE_IFACE,
964
693
out_signature="s",
965
694
path_keyword='object_path',
966
695
connection_keyword='connection')
967
696
def Introspect(self, object_path, connection):
968
"""Overloading of standard D-Bus method.
969
970
Inserts property tags and interface annotation tags.
697
"""Standard D-Bus method, overloaded to insert property tags.
971
698
"""
972
699
xmlstring = dbus.service.Object.Introspect(self, object_path,
973
700
connection)
980
707
e.setAttribute("access", prop._dbus_access)
981
708
return e
982
709
for if_tag in document.getElementsByTagName("interface"):
983
# Add property tags
984
710
for tag in (make_tag(document, name, prop)
985
711
for name, prop
986
in self._get_all_dbus_things("property")
712
in self._get_all_dbus_properties()
987
713
if prop._dbus_interface
988
714
== if_tag.getAttribute("name")):
989
715
if_tag.appendChild(tag)
990
# Add annotation tags
991
for typ in ("method", "signal", "property"):
992
for tag in if_tag.getElementsByTagName(typ):
993
annots = dict()
994
for name, prop in (self.
995
_get_all_dbus_things(typ)):
996
if (name == tag.getAttribute("name")
997
and prop._dbus_interface
998
== if_tag.getAttribute("name")):
999
annots.update(getattr
1000
(prop,
1001
"_dbus_annotations",
1002
{}))
1003
for name, value in annots.items():
1004
ann_tag = document.createElement(
1005
"annotation")
1006
ann_tag.setAttribute("name", name)
1007
ann_tag.setAttribute("value", value)
1008
tag.appendChild(ann_tag)
1009
# Add interface annotation tags
1010
for annotation, value in dict(
1011
itertools.chain.from_iterable(
1012
annotations().items()
1013
for name, annotations in
1014
self._get_all_dbus_things("interface")
1015
if name == if_tag.getAttribute("name")
1016
)).items():
1017
ann_tag = document.createElement("annotation")
1018
ann_tag.setAttribute("name", annotation)
1019
ann_tag.setAttribute("value", value)
1020
if_tag.appendChild(ann_tag)
1021
716
# Add the names to the return values for the
1022
717
# "org.freedesktop.DBus.Properties" methods
1023
718
if (if_tag.getAttribute("name")
1038
733
except (AttributeError, xml.dom.DOMException,
1039
734
xml.parsers.expat.ExpatError) as error:
1040
735
logger.error("Failed to override Introspection method",
1041
exc_info=error)
736
error)
1042
737
return xmlstring
1043
738
1044
739
1045
def datetime_to_dbus(dt, variant_level=0):
1046
"""Convert a UTC datetime.datetime() to a D-Bus type."""
1047
if dt is None:
1048
return dbus.String("", variant_level = variant_level)
1049
return dbus.String(dt.isoformat(),
1050
variant_level=variant_level)
1051
1052
1053
def alternate_dbus_interfaces(alt_interface_names, deprecate=True):
1054
"""A class decorator; applied to a subclass of
1055
dbus.service.Object, it will add alternate D-Bus attributes with
1056
interface names according to the "alt_interface_names" mapping.
1057
Usage:
1058
1059
@alternate_dbus_interfaces({"org.example.Interface":
1060
"net.example.AlternateInterface"})
1061
class SampleDBusObject(dbus.service.Object):
1062
@dbus.service.method("org.example.Interface")
1063
def SampleDBusMethod():
1064
pass
1065
1066
The above "SampleDBusMethod" on "SampleDBusObject" will be
1067
reachable via two interfaces: "org.example.Interface" and
1068
"net.example.AlternateInterface", the latter of which will have
1069
its D-Bus annotation "org.freedesktop.DBus.Deprecated" set to
1070
"true", unless "deprecate" is passed with a False value.
1071
1072
This works for methods and signals, and also for D-Bus properties
1073
(from DBusObjectWithProperties) and interfaces (from the
1074
dbus_interface_annotations decorator).
1075
"""
1076
def wrapper(cls):
1077
for orig_interface_name, alt_interface_name in (
1078
alt_interface_names.items()):
1079
attr = {}
1080
interface_names = set()
1081
# Go though all attributes of the class
1082
for attrname, attribute in inspect.getmembers(cls):
1083
# Ignore non-D-Bus attributes, and D-Bus attributes
1084
# with the wrong interface name
1085
if (not hasattr(attribute, "_dbus_interface")
1086
or not attribute._dbus_interface
1087
.startswith(orig_interface_name)):
1088
continue
1089
# Create an alternate D-Bus interface name based on
1090
# the current name
1091
alt_interface = (attribute._dbus_interface
1092
.replace(orig_interface_name,
1093
alt_interface_name))
1094
interface_names.add(alt_interface)
1095
# Is this a D-Bus signal?
1096
if getattr(attribute, "_dbus_is_signal", False):
1097
# Extract the original non-method undecorated
1098
# function by black magic
1099
nonmethod_func = (dict(
1100
zip(attribute.func_code.co_freevars,
1101
attribute.__closure__))["func"]
1102
.cell_contents)
1103
# Create a new, but exactly alike, function
1104
# object, and decorate it to be a new D-Bus signal
1105
# with the alternate D-Bus interface name
1106
new_function = (dbus.service.signal
1107
(alt_interface,
1108
attribute._dbus_signature)
1109
(types.FunctionType(
1110
nonmethod_func.func_code,
1111
nonmethod_func.func_globals,
1112
nonmethod_func.func_name,
1113
nonmethod_func.func_defaults,
1114
nonmethod_func.func_closure)))
1115
# Copy annotations, if any
1116
try:
1117
new_function._dbus_annotations = (
1118
dict(attribute._dbus_annotations))
1119
except AttributeError:
1120
pass
1121
# Define a creator of a function to call both the
1122
# original and alternate functions, so both the
1123
# original and alternate signals gets sent when
1124
# the function is called
1125
def fixscope(func1, func2):
1126
"""This function is a scope container to pass
1127
func1 and func2 to the "call_both" function
1128
outside of its arguments"""
1129
def call_both(*args, **kwargs):
1130
"""This function will emit two D-Bus
1131
signals by calling func1 and func2"""
1132
func1(*args, **kwargs)
1133
func2(*args, **kwargs)
1134
return call_both
1135
# Create the "call_both" function and add it to
1136
# the class
1137
attr[attrname] = fixscope(attribute, new_function)
1138
# Is this a D-Bus method?
1139
elif getattr(attribute, "_dbus_is_method", False):
1140
# Create a new, but exactly alike, function
1141
# object. Decorate it to be a new D-Bus method
1142
# with the alternate D-Bus interface name. Add it
1143
# to the class.
1144
attr[attrname] = (dbus.service.method
1145
(alt_interface,
1146
attribute._dbus_in_signature,
1147
attribute._dbus_out_signature)
1148
(types.FunctionType
1149
(attribute.func_code,
1150
attribute.func_globals,
1151
attribute.func_name,
1152
attribute.func_defaults,
1153
attribute.func_closure)))
1154
# Copy annotations, if any
1155
try:
1156
attr[attrname]._dbus_annotations = (
1157
dict(attribute._dbus_annotations))
1158
except AttributeError:
1159
pass
1160
# Is this a D-Bus property?
1161
elif getattr(attribute, "_dbus_is_property", False):
1162
# Create a new, but exactly alike, function
1163
# object, and decorate it to be a new D-Bus
1164
# property with the alternate D-Bus interface
1165
# name. Add it to the class.
1166
attr[attrname] = (dbus_service_property
1167
(alt_interface,
1168
attribute._dbus_signature,
1169
attribute._dbus_access,
1170
attribute
1171
._dbus_get_args_options
1172
["byte_arrays"])
1173
(types.FunctionType
1174
(attribute.func_code,
1175
attribute.func_globals,
1176
attribute.func_name,
1177
attribute.func_defaults,
1178
attribute.func_closure)))
1179
# Copy annotations, if any
1180
try:
1181
attr[attrname]._dbus_annotations = (
1182
dict(attribute._dbus_annotations))
1183
except AttributeError:
1184
pass
1185
# Is this a D-Bus interface?
1186
elif getattr(attribute, "_dbus_is_interface", False):
1187
# Create a new, but exactly alike, function
1188
# object. Decorate it to be a new D-Bus interface
1189
# with the alternate D-Bus interface name. Add it
1190
# to the class.
1191
attr[attrname] = (dbus_interface_annotations
1192
(alt_interface)
1193
(types.FunctionType
1194
(attribute.func_code,
1195
attribute.func_globals,
1196
attribute.func_name,
1197
attribute.func_defaults,
1198
attribute.func_closure)))
1199
if deprecate:
1200
# Deprecate all alternate interfaces
1201
iname="_AlternateDBusNames_interface_annotation{}"
1202
for interface_name in interface_names:
1203
@dbus_interface_annotations(interface_name)
1204
def func(self):
1205
return { "org.freedesktop.DBus.Deprecated":
1206
"true" }
1207
# Find an unused name
1208
for aname in (iname.format(i)
1209
for i in itertools.count()):
1210
if aname not in attr:
1211
attr[aname] = func
1212
break
1213
if interface_names:
1214
# Replace the class with a new subclass of it with
1215
# methods, signals, etc. as created above.
1216
cls = type(b"{}Alternate".format(cls.__name__),
1217
(cls,), attr)
1218
return cls
1219
return wrapper
1220
1221
1222
@alternate_dbus_interfaces({"se.recompile.Mandos":
1223
"se.bsnet.fukt.Mandos"})
1224
740
class ClientDBus(Client, DBusObjectWithProperties):
1225
741
"""A Client class using D-Bus
1226
742
1232
748
runtime_expansions = (Client.runtime_expansions
1233
749
+ ("dbus_object_path",))
1234
750
1235
_interface = "se.recompile.Mandos.Client"
1236
1237
751
# dbus.service.Object doesn't use super(), so we can't either.
1238
752
1239
753
def __init__(self, bus = None, *args, **kwargs):
754
self._approvals_pending = 0
1240
755
self.bus = bus
1241
756
Client.__init__(self, *args, **kwargs)
1242
757
# Only now, when this client is initialized, can it show up on
1243
758
# the D-Bus
1244
client_object_name = str(self.name).translate(
759
client_object_name = unicode(self.name).translate(
1245
760
{ord("."): ord("_"),
1246
761
ord("-"): ord("_")})
1247
762
self.dbus_object_path = (dbus.ObjectPath
1248
763
("/clients/" + client_object_name))
1249
764
DBusObjectWithProperties.__init__(self, self.bus,
1250
765
self.dbus_object_path)
1251
1252
def notifychangeproperty(transform_func,
1253
dbus_name, type_func=lambda x: x,
1254
variant_level=1, invalidate_only=False,
1255
_interface=_interface):
1256
""" Modify a variable so that it's a property which announces
1257
its changes to DBus.
1258
1259
transform_fun: Function that takes a value and a variant_level
1260
and transforms it to a D-Bus type.
1261
dbus_name: D-Bus name of the variable
1262
type_func: Function that transform the value before sending it
1263
to the D-Bus. Default: no transform
1264
variant_level: D-Bus variant level. Default: 1
1265
"""
1266
attrname = "_{}".format(dbus_name)
1267
def setter(self, value):
1268
if hasattr(self, "dbus_object_path"):
1269
if (not hasattr(self, attrname) or
1270
type_func(getattr(self, attrname, None))
1271
!= type_func(value)):
1272
if invalidate_only:
1273
self.PropertiesChanged(_interface,
1274
dbus.Dictionary(),
1275
dbus.Array
1276
((dbus_name,)))
1277
else:
1278
dbus_value = transform_func(type_func(value),
1279
variant_level
1280
=variant_level)
1281
self.PropertyChanged(dbus.String(dbus_name),
1282
dbus_value)
1283
self.PropertiesChanged(_interface,
1284
dbus.Dictionary({
1285
dbus.String(dbus_name):
1286
dbus_value }), dbus.Array())
1287
setattr(self, attrname, value)
1288
1289
return property(lambda self: getattr(self, attrname), setter)
1290
1291
expires = notifychangeproperty(datetime_to_dbus, "Expires")
1292
approvals_pending = notifychangeproperty(dbus.Boolean,
1293
"ApprovalPending",
1294
type_func = bool)
1295
enabled = notifychangeproperty(dbus.Boolean, "Enabled")
1296
last_enabled = notifychangeproperty(datetime_to_dbus,
1297
"LastEnabled")
1298
checker = notifychangeproperty(dbus.Boolean, "CheckerRunning",
1299
type_func = lambda checker:
1300
checker is not None)
1301
last_checked_ok = notifychangeproperty(datetime_to_dbus,
1302
"LastCheckedOK")
1303
last_checker_status = notifychangeproperty(dbus.Int16,
1304
"LastCheckerStatus")
1305
last_approval_request = notifychangeproperty(
1306
datetime_to_dbus, "LastApprovalRequest")
1307
approved_by_default = notifychangeproperty(dbus.Boolean,
1308
"ApprovedByDefault")
1309
approval_delay = notifychangeproperty(dbus.UInt64,
1310
"ApprovalDelay",
1311
type_func =
1312
lambda td: td.total_seconds()
1313
* 1000)
1314
approval_duration = notifychangeproperty(
1315
dbus.UInt64, "ApprovalDuration",
1316
type_func = lambda td: td.total_seconds() * 1000)
1317
host = notifychangeproperty(dbus.String, "Host")
1318
timeout = notifychangeproperty(dbus.UInt64, "Timeout",
1319
type_func = lambda td:
1320
td.total_seconds() * 1000)
1321
extended_timeout = notifychangeproperty(
1322
dbus.UInt64, "ExtendedTimeout",
1323
type_func = lambda td: td.total_seconds() * 1000)
1324
interval = notifychangeproperty(dbus.UInt64,
1325
"Interval",
1326
type_func =
1327
lambda td: td.total_seconds()
1328
* 1000)
1329
checker_command = notifychangeproperty(dbus.String, "Checker")
1330
secret = notifychangeproperty(dbus.ByteArray, "Secret",
1331
invalidate_only=True)
1332
1333
del notifychangeproperty
766
767
def _get_approvals_pending(self):
768
return self._approvals_pending
769
def _set_approvals_pending(self, value):
770
old_value = self._approvals_pending
771
self._approvals_pending = value
772
bval = bool(value)
773
if (hasattr(self, "dbus_object_path")
774
and bval is not bool(old_value)):
775
dbus_bool = dbus.Boolean(bval, variant_level=1)
776
self.PropertyChanged(dbus.String("ApprovalPending"),
777
dbus_bool)
778
779
approvals_pending = property(_get_approvals_pending,
780
_set_approvals_pending)
781
del _get_approvals_pending, _set_approvals_pending
782
783
@staticmethod
784
def _datetime_to_dbus(dt, variant_level=0):
785
"""Convert a UTC datetime.datetime() to a D-Bus type."""
786
return dbus.String(dt.isoformat(),
787
variant_level=variant_level)
788
789
def enable(self):
790
oldstate = getattr(self, "enabled", False)
791
r = Client.enable(self)
792
if oldstate != self.enabled:
793
# Emit D-Bus signals
794
self.PropertyChanged(dbus.String("Enabled"),
795
dbus.Boolean(True, variant_level=1))
796
self.PropertyChanged(
797
dbus.String("LastEnabled"),
798
self._datetime_to_dbus(self.last_enabled,
799
variant_level=1))
800
return r
801
802
def disable(self, quiet = False):
803
oldstate = getattr(self, "enabled", False)
804
r = Client.disable(self, quiet=quiet)
805
if not quiet and oldstate != self.enabled:
806
# Emit D-Bus signal
807
self.PropertyChanged(dbus.String("Enabled"),
808
dbus.Boolean(False, variant_level=1))
809
return r
1334
810
1335
811
def __del__(self, *args, **kwargs):
1336
812
try:
1345
821
*args, **kwargs):
1346
822
self.checker_callback_tag = None
1347
823
self.checker = None
824
# Emit D-Bus signal
825
self.PropertyChanged(dbus.String("CheckerRunning"),
826
dbus.Boolean(False, variant_level=1))
1348
827
if os.WIFEXITED(condition):
1349
828
exitstatus = os.WEXITSTATUS(condition)
1350
829
# Emit D-Bus signal
1360
839
return Client.checker_callback(self, pid, condition, command,
1361
840
*args, **kwargs)
1362
841
842
def checked_ok(self, *args, **kwargs):
843
Client.checked_ok(self, *args, **kwargs)
844
# Emit D-Bus signal
845
self.PropertyChanged(
846
dbus.String("LastCheckedOK"),
847
(self._datetime_to_dbus(self.last_checked_ok,
848
variant_level=1)))
849
850
def need_approval(self, *args, **kwargs):
851
r = Client.need_approval(self, *args, **kwargs)
852
# Emit D-Bus signal
853
self.PropertyChanged(
854
dbus.String("LastApprovalRequest"),
855
(self._datetime_to_dbus(self.last_approval_request,
856
variant_level=1)))
857
return r
858
1363
859
def start_checker(self, *args, **kwargs):
1364
old_checker_pid = getattr(self.checker, "pid", None)
860
old_checker = self.checker
861
if self.checker is not None:
862
old_checker_pid = self.checker.pid
863
else:
864
old_checker_pid = None
1365
865
r = Client.start_checker(self, *args, **kwargs)
1366
866
# Only if new checker process was started
1367
867
if (self.checker is not None
1368
868
and old_checker_pid != self.checker.pid):
1369
869
# Emit D-Bus signal
1370
870
self.CheckerStarted(self.current_checker_command)
871
self.PropertyChanged(
872
dbus.String("CheckerRunning"),
873
dbus.Boolean(True, variant_level=1))
1371
874
return r
1372
875
876
def stop_checker(self, *args, **kwargs):
877
old_checker = getattr(self, "checker", None)
878
r = Client.stop_checker(self, *args, **kwargs)
879
if (old_checker is not None
880
and getattr(self, "checker", None) is None):
881
self.PropertyChanged(dbus.String("CheckerRunning"),
882
dbus.Boolean(False, variant_level=1))
883
return r
884
1373
885
def _reset_approved(self):
1374
self.approved = None
886
self._approved = None
1375
887
return False
1376
888
1377
889
def approve(self, value=True):
1378
self.approved = value
1379
gobject.timeout_add(int(self.approval_duration.total_seconds()
1380
* 1000), self._reset_approved)
1381
890
self.send_changedstate()
891
self._approved = value
892
gobject.timeout_add(self._timedelta_to_milliseconds
893
(self.approval_duration),
894
self._reset_approved)
895
1382
896
1383
897
## D-Bus methods, signals & properties
1384
1385
## Interfaces
898
_interface = "se.bsnet.fukt.Mandos.Client"
1386
899
1387
900
## Signals
1388
901
1399
912
pass
1400
913
1401
914
# PropertyChanged - signal
1402
@dbus_annotations({"org.freedesktop.DBus.Deprecated": "true"})
1403
915
@dbus.service.signal(_interface, signature="sv")
1404
916
def PropertyChanged(self, property, value):
1405
917
"D-Bus signal"
1475
987
if value is None: # get
1476
988
return dbus.Boolean(self.approved_by_default)
1477
989
self.approved_by_default = bool(value)
990
# Emit D-Bus signal
991
self.PropertyChanged(dbus.String("ApprovedByDefault"),
992
dbus.Boolean(value, variant_level=1))
1478
993
1479
994
# ApprovalDelay - property
1480
995
@dbus_service_property(_interface, signature="t",
1481
996
access="readwrite")
1482
997
def ApprovalDelay_dbus_property(self, value=None):
1483
998
if value is None: # get
1484
return dbus.UInt64(self.approval_delay.total_seconds()
1485
* 1000)
999
return dbus.UInt64(self.approval_delay_milliseconds())
1486
1000
self.approval_delay = datetime.timedelta(0, 0, 0, value)
1001
# Emit D-Bus signal
1002
self.PropertyChanged(dbus.String("ApprovalDelay"),
1003
dbus.UInt64(value, variant_level=1))
1487
1004
1488
1005
# ApprovalDuration - property
1489
1006
@dbus_service_property(_interface, signature="t",
1490
1007
access="readwrite")
1491
1008
def ApprovalDuration_dbus_property(self, value=None):
1492
1009
if value is None: # get
1493
return dbus.UInt64(self.approval_duration.total_seconds()
1494
* 1000)
1010
return dbus.UInt64(self._timedelta_to_milliseconds(
1011
self.approval_duration))
1495
1012
self.approval_duration = datetime.timedelta(0, 0, 0, value)
1013
# Emit D-Bus signal
1014
self.PropertyChanged(dbus.String("ApprovalDuration"),
1015
dbus.UInt64(value, variant_level=1))
1496
1016
1497
1017
# Name - property
1498
1018
@dbus_service_property(_interface, signature="s", access="read")
1510
1030
def Host_dbus_property(self, value=None):
1511
1031
if value is None: # get
1512
1032
return dbus.String(self.host)
1513
self.host = str(value)
1033
self.host = value
1034
# Emit D-Bus signal
1035
self.PropertyChanged(dbus.String("Host"),
1036
dbus.String(value, variant_level=1))
1514
1037
1515
1038
# Created - property
1516
1039
@dbus_service_property(_interface, signature="s", access="read")
1517
1040
def Created_dbus_property(self):
1518
return datetime_to_dbus(self.created)
1041
return dbus.String(self._datetime_to_dbus(self.created))
1519
1042
1520
1043
# LastEnabled - property
1521
1044
@dbus_service_property(_interface, signature="s", access="read")
1522
1045
def LastEnabled_dbus_property(self):
1523
return datetime_to_dbus(self.last_enabled)
1046
if self.last_enabled is None:
1047
return dbus.String("")
1048
return dbus.String(self._datetime_to_dbus(self.last_enabled))
1524
1049
1525
1050
# Enabled - property
1526
1051
@dbus_service_property(_interface, signature="b",
1540
1065
if value is not None:
1541
1066
self.checked_ok()
1542
1067
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)
1068
if self.last_checked_ok is None:
1069
return dbus.String("")
1070
return dbus.String(self._datetime_to_dbus(self
1071
.last_checked_ok))
1555
1072
1556
1073
# LastApprovalRequest - property
1557
1074
@dbus_service_property(_interface, signature="s", access="read")
1558
1075
def LastApprovalRequest_dbus_property(self):
1559
return datetime_to_dbus(self.last_approval_request)
1076
if self.last_approval_request is None:
1077
return dbus.String("")
1078
return dbus.String(self.
1079
_datetime_to_dbus(self
1080
.last_approval_request))
1560
1081
1561
1082
# Timeout - property
1562
1083
@dbus_service_property(_interface, signature="t",
1563
1084
access="readwrite")
1564
1085
def Timeout_dbus_property(self, value=None):
1565
1086
if value is None: # get
1566
return dbus.UInt64(self.timeout.total_seconds() * 1000)
1567
old_timeout = self.timeout
1087
return dbus.UInt64(self.timeout_milliseconds())
1568
1088
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
int((self.expires - now).total_seconds()
1584
* 1000), 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.total_seconds()
1592
* 1000)
1593
self.extended_timeout = datetime.timedelta(0, 0, 0, value)
1089
# Emit D-Bus signal
1090
self.PropertyChanged(dbus.String("Timeout"),
1091
dbus.UInt64(value, variant_level=1))
1092
if getattr(self, "disable_initiator_tag", None) is None:
1093
return
1094
# Reschedule timeout
1095
gobject.source_remove(self.disable_initiator_tag)
1096
self.disable_initiator_tag = None
1097
time_to_die = (self.
1098
_timedelta_to_milliseconds((self
1099
.last_checked_ok
1100
+ self.timeout)
1101
- datetime.datetime
1102
.utcnow()))
1103
if time_to_die <= 0:
1104
# The timeout has passed
1105
self.disable()
1106
else:
1107
self.disable_initiator_tag = (gobject.timeout_add
1108
(time_to_die, self.disable))
1594
1109
1595
1110
# Interval - property
1596
1111
@dbus_service_property(_interface, signature="t",
1597
1112
access="readwrite")
1598
1113
def Interval_dbus_property(self, value=None):
1599
1114
if value is None: # get
1600
return dbus.UInt64(self.interval.total_seconds() * 1000)
1115
return dbus.UInt64(self.interval_milliseconds())
1601
1116
self.interval = datetime.timedelta(0, 0, 0, value)
1117
# Emit D-Bus signal
1118
self.PropertyChanged(dbus.String("Interval"),
1119
dbus.UInt64(value, variant_level=1))
1602
1120
if getattr(self, "checker_initiator_tag", None) is None:
1603
1121
return
1604
if self.enabled:
1605
# Reschedule checker run
1606
gobject.source_remove(self.checker_initiator_tag)
1607
self.checker_initiator_tag = (gobject.timeout_add
1608
(value, self.start_checker))
1609
self.start_checker() # Start one now, too
1610
1122
# Reschedule checker run
1123
gobject.source_remove(self.checker_initiator_tag)
1124
self.checker_initiator_tag = (gobject.timeout_add
1125
(value, self.start_checker))
1126
self.start_checker() # Start one now, too
1127
1611
1128
# Checker - property
1612
1129
@dbus_service_property(_interface, signature="s",
1613
1130
access="readwrite")
1614
1131
def Checker_dbus_property(self, value=None):
1615
1132
if value is None: # get
1616
1133
return dbus.String(self.checker_command)
1617
self.checker_command = str(value)
1134
self.checker_command = value
1135
# Emit D-Bus signal
1136
self.PropertyChanged(dbus.String("Checker"),
1137
dbus.String(self.checker_command,
1138
variant_level=1))
1618
1139
1619
1140
# CheckerRunning - property
1620
1141
@dbus_service_property(_interface, signature="b",
1636
1157
@dbus_service_property(_interface, signature="ay",
1637
1158
access="write", byte_arrays=True)
1638
1159
def Secret_dbus_property(self, value):
1639
self.secret = bytes(value)
1160
self.secret = str(value)
1640
1161
1641
1162
del _interface
1642
1163
1647
1168
self._pipe.send(('init', fpr, address))
1648
1169
if not self._pipe.recv():
1649
1170
raise KeyError()
1650
1171
1651
1172
def __getattribute__(self, name):
1652
if name == '_pipe':
1173
if(name == '_pipe'):
1653
1174
return super(ProxyClient, self).__getattribute__(name)
1654
1175
self._pipe.send(('getattr', name))
1655
1176
data = self._pipe.recv()
1660
1181
self._pipe.send(('funcall', name, args, kwargs))
1661
1182
return self._pipe.recv()[1]
1662
1183
return func
1663
1184
1664
1185
def __setattr__(self, name, value):
1665
if name == '_pipe':
1186
if(name == '_pipe'):
1666
1187
return super(ProxyClient, self).__setattr__(name, value)
1667
1188
self._pipe.send(('setattr', name, value))
1668
1189
1676
1197
def handle(self):
1677
1198
with contextlib.closing(self.server.child_pipe) as child_pipe:
1678
1199
logger.info("TCP connection from: %s",
1679
str(self.client_address))
1200
unicode(self.client_address))
1680
1201
logger.debug("Pipe FD: %d",
1681
1202
self.server.child_pipe.fileno())
1682
1203
1683
1204
session = (gnutls.connection
1684
1205
.ClientSession(self.request,
1685
1206
gnutls.connection
1686
1207
.X509Credentials()))
1687
1208
1688
1209
# Note: gnutls.connection.X509Credentials is really a
1689
1210
# generic GnuTLS certificate credentials object so long as
1690
1211
# no X.509 keys are added to it. Therefore, we can use it
1691
1212
# here despite using OpenPGP certificates.
1692
1213
1693
1214
#priority = ':'.join(("NONE", "+VERS-TLS1.1",
1694
1215
# "+AES-256-CBC", "+SHA1",
1695
1216
# "+COMP-NULL", "+CTYPE-OPENPGP",
1701
1222
(gnutls.library.functions
1702
1223
.gnutls_priority_set_direct(session._c_object,
1703
1224
priority, None))
1704
1225
1705
1226
# Start communication using the Mandos protocol
1706
1227
# Get protocol number
1707
1228
line = self.request.makefile().readline()
1708
1229
logger.debug("Protocol version: %r", line)
1709
1230
try:
1710
1231
if int(line.strip().split()[0]) > 1:
1711
raise RuntimeError(line)
1232
raise RuntimeError
1712
1233
except (ValueError, IndexError, RuntimeError) as error:
1713
1234
logger.error("Unknown protocol version: %s", error)
1714
1235
return
1715
1236
1716
1237
# Start GnuTLS connection
1717
1238
try:
1718
1239
session.handshake()
1722
1243
# established. Just abandon the request.
1723
1244
return
1724
1245
logger.debug("Handshake succeeded")
1725
1246
1726
1247
approval_required = False
1727
1248
try:
1728
1249
try:
1733
1254
logger.warning("Bad certificate: %s", error)
1734
1255
return
1735
1256
logger.debug("Fingerprint: %s", fpr)
1736
1257
1737
1258
try:
1738
1259
client = ProxyClient(child_pipe, fpr,
1739
1260
self.client_address)
1751
1272
client.name)
1752
1273
if self.server.use_dbus:
1753
1274
# Emit D-Bus signal
1754
client.Rejected("Disabled")
1275
client.Rejected("Disabled")
1755
1276
return
1756
1277
1757
if client.approved or not client.approval_delay:
1278
if client._approved or not client.approval_delay:
1758
1279
#We are approved or approval is disabled
1759
1280
break
1760
elif client.approved is None:
1281
elif client._approved is None:
1761
1282
logger.info("Client %s needs approval",
1762
1283
client.name)
1763
1284
if self.server.use_dbus:
1764
1285
# Emit D-Bus signal
1765
1286
client.NeedApproval(
1766
client.approval_delay.total_seconds()
1767
* 1000, client.approved_by_default)
1287
client.approval_delay_milliseconds(),
1288
client.approved_by_default)
1768
1289
else:
1769
1290
logger.warning("Client %s was not approved",
1770
1291
client.name)
1774
1295
return
1775
1296
1776
1297
#wait until timeout or approved
1298
#x = float(client._timedelta_to_milliseconds(delay))
1777
1299
time = datetime.datetime.now()
1778
1300
client.changedstate.acquire()
1779
client.changedstate.wait(delay.total_seconds())
1301
client.changedstate.wait(float(client._timedelta_to_milliseconds(delay) / 1000))
1780
1302
client.changedstate.release()
1781
1303
time2 = datetime.datetime.now()
1782
1304
if (time2 - time) >= delay:
1798
1320
try:
1799
1321
sent = session.send(client.secret[sent_size:])
1800
1322
except gnutls.errors.GNUTLSError as error:
1801
logger.warning("gnutls send failed",
1802
exc_info=error)
1323
logger.warning("gnutls send failed")
1803
1324
return
1804
1325
logger.debug("Sent: %d, remaining: %d",
1805
1326
sent, len(client.secret)
1806
1327
- (sent_size + sent))
1807
1328
sent_size += sent
1808
1329
1809
1330
logger.info("Sending secret to %s", client.name)
1810
# bump the timeout using extended_timeout
1811
client.bump_timeout(client.extended_timeout)
1331
# bump the timeout as if seen
1332
client.checked_ok()
1812
1333
if self.server.use_dbus:
1813
1334
# Emit D-Bus signal
1814
1335
client.GotSecret()
1819
1340
try:
1820
1341
session.bye()
1821
1342
except gnutls.errors.GNUTLSError as error:
1822
logger.warning("GnuTLS bye failed",
1823
exc_info=error)
1343
logger.warning("GnuTLS bye failed")
1824
1344
1825
1345
@staticmethod
1826
1346
def peer_certificate(session):
1882
1402
# Convert the buffer to a Python bytestring
1883
1403
fpr = ctypes.string_at(buf, buf_len.value)
1884
1404
# Convert the bytestring to hexadecimal notation
1885
hex_fpr = binascii.hexlify(fpr).upper()
1405
hex_fpr = ''.join("%02X" % ord(char) for char in fpr)
1886
1406
return hex_fpr
1887
1407
1888
1408
1891
1411
def sub_process_main(self, request, address):
1892
1412
try:
1893
1413
self.finish_request(request, address)
1894
except Exception:
1414
except:
1895
1415
self.handle_error(request, address)
1896
1416
self.close_request(request)
1897
1417
1898
1418
def process_request(self, request, address):
1899
1419
"""Start a new process to process the request."""
1900
proc = multiprocessing.Process(target = self.sub_process_main,
1901
args = (request, address))
1902
proc.start()
1903
return proc
1904
1420
multiprocessing.Process(target = self.sub_process_main,
1421
args = (request, address)).start()
1905
1422
1906
1423
class MultiprocessingMixInWithPipe(MultiprocessingMixIn, object):
1907
1424
""" adds a pipe to the MixIn """
1911
1428
This function creates a new pipe in self.pipe
1912
1429
"""
1913
1430
parent_pipe, self.child_pipe = multiprocessing.Pipe()
1914
1915
proc = MultiprocessingMixIn.process_request(self, request,
1916
client_address)
1431
1432
super(MultiprocessingMixInWithPipe,
1433
self).process_request(request, client_address)
1917
1434
self.child_pipe.close()
1918
self.add_pipe(parent_pipe, proc)
1919
1920
def add_pipe(self, parent_pipe, proc):
1435
self.add_pipe(parent_pipe)
1436
1437
def add_pipe(self, parent_pipe):
1921
1438
"""Dummy function; override as necessary"""
1922
raise NotImplementedError()
1923
1439
raise NotImplementedError
1924
1440
1925
1441
class IPv6_TCPServer(MultiprocessingMixInWithPipe,
1926
1442
socketserver.TCPServer, object):
1932
1448
use_ipv6: Boolean; to use IPv6 or not
1933
1449
"""
1934
1450
def __init__(self, server_address, RequestHandlerClass,
1935
interface=None, use_ipv6=True, socketfd=None):
1936
"""If socketfd is set, use that file descriptor instead of
1937
creating a new one with socket.socket().
1938
"""
1451
interface=None, use_ipv6=True):
1939
1452
self.interface = interface
1940
1453
if use_ipv6:
1941
1454
self.address_family = socket.AF_INET6
1942
if socketfd is not None:
1943
# Save the file descriptor
1944
self.socketfd = socketfd
1945
# Save the original socket.socket() function
1946
self.socket_socket = socket.socket
1947
# To implement --socket, we monkey patch socket.socket.
1948
#
1949
# (When socketserver.TCPServer is a new-style class, we
1950
# could make self.socket into a property instead of monkey
1951
# patching socket.socket.)
1952
#
1953
# Create a one-time-only replacement for socket.socket()
1954
@functools.wraps(socket.socket)
1955
def socket_wrapper(*args, **kwargs):
1956
# Restore original function so subsequent calls are
1957
# not affected.
1958
socket.socket = self.socket_socket
1959
del self.socket_socket
1960
# This time only, return a new socket object from the
1961
# saved file descriptor.
1962
return socket.fromfd(self.socketfd, *args, **kwargs)
1963
# Replace socket.socket() function with wrapper
1964
socket.socket = socket_wrapper
1965
# The socketserver.TCPServer.__init__ will call
1966
# socket.socket(), which might be our replacement,
1967
# socket_wrapper(), if socketfd was set.
1968
1455
socketserver.TCPServer.__init__(self, server_address,
1969
1456
RequestHandlerClass)
1970
1971
1457
def server_bind(self):
1972
1458
"""This overrides the normal server_bind() function
1973
1459
to bind to an interface if one was specified, and also NOT to
1981
1467
try:
1982
1468
self.socket.setsockopt(socket.SOL_SOCKET,
1983
1469
SO_BINDTODEVICE,
1984
(self.interface + "\0")
1985
.encode("utf-8"))
1470
str(self.interface
1471
+ '\0'))
1986
1472
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:
1473
if error[0] == errno.EPERM:
1474
logger.error("No permission to"
1475
" bind to interface %s",
1476
self.interface)
1477
elif error[0] == errno.ENOPROTOOPT:
1991
1478
logger.error("SO_BINDTODEVICE not available;"
1992
1479
" cannot bind to interface %s",
1993
1480
self.interface)
1994
elif error.errno == errno.ENODEV:
1995
logger.error("Interface %s does not exist,"
1996
" cannot bind", self.interface)
1997
1481
else:
1998
1482
raise
1999
1483
# Only bind(2) the socket if we really need to.
2002
1486
if self.address_family == socket.AF_INET6:
2003
1487
any_address = "::" # in6addr_any
2004
1488
else:
2005
any_address = "0.0.0.0" # INADDR_ANY
1489
any_address = socket.INADDR_ANY
2006
1490
self.server_address = (any_address,
2007
1491
self.server_address[1])
2008
1492
elif not self.server_address[1]:
2029
1513
"""
2030
1514
def __init__(self, server_address, RequestHandlerClass,
2031
1515
interface=None, use_ipv6=True, clients=None,
2032
gnutls_priority=None, use_dbus=True, socketfd=None):
1516
gnutls_priority=None, use_dbus=True):
2033
1517
self.enabled = False
2034
1518
self.clients = clients
2035
1519
if self.clients is None:
2036
self.clients = {}
1520
self.clients = set()
2037
1521
self.use_dbus = use_dbus
2038
1522
self.gnutls_priority = gnutls_priority
2039
1523
IPv6_TCPServer.__init__(self, server_address,
2040
1524
RequestHandlerClass,
2041
1525
interface = interface,
2042
use_ipv6 = use_ipv6,
2043
socketfd = socketfd)
1526
use_ipv6 = use_ipv6)
2044
1527
def server_activate(self):
2045
1528
if self.enabled:
2046
1529
return socketserver.TCPServer.server_activate(self)
2047
2048
1530
def enable(self):
2049
1531
self.enabled = True
2050
2051
def add_pipe(self, parent_pipe, proc):
1532
def add_pipe(self, parent_pipe):
2052
1533
# Call "handle_ipc" for both data and EOF events
2053
1534
gobject.io_add_watch(parent_pipe.fileno(),
2054
1535
gobject.IO_IN | gobject.IO_HUP,
2055
1536
functools.partial(self.handle_ipc,
2056
parent_pipe =
2057
parent_pipe,
2058
proc = proc))
2059
1537
parent_pipe = parent_pipe))
1538
2060
1539
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()
1540
client_object=None):
1541
condition_names = {
1542
gobject.IO_IN: "IN", # There is data to read.
1543
gobject.IO_OUT: "OUT", # Data can be written (without
1544
# blocking).
1545
gobject.IO_PRI: "PRI", # There is urgent data to read.
1546
gobject.IO_ERR: "ERR", # Error condition.
1547
gobject.IO_HUP: "HUP" # Hung up (the connection has been
1548
# broken, usually for pipes and
1549
# sockets).
1550
}
1551
conditions_string = ' | '.join(name
1552
for cond, name in
1553
condition_names.iteritems()
1554
if cond & condition)
1555
# error or the other end of multiprocessing.Pipe has closed
1556
if condition & (gobject.IO_ERR | condition & gobject.IO_HUP):
2066
1557
return False
2067
1558
2068
1559
# Read a request from the child
2073
1564
fpr = request[1]
2074
1565
address = request[2]
2075
1566
2076
for c in self.clients.itervalues():
1567
for c in self.clients:
2077
1568
if c.fingerprint == fpr:
2078
1569
client = c
2079
1570
break
2082
1573
"dress: %s", fpr, address)
2083
1574
if self.use_dbus:
2084
1575
# Emit D-Bus signal
2085
mandos_dbus_service.ClientNotFound(fpr,
2086
address[0])
1576
mandos_dbus_service.ClientNotFound(fpr, address[0])
2087
1577
parent_pipe.send(False)
2088
1578
return False
2089
1579
2090
1580
gobject.io_add_watch(parent_pipe.fileno(),
2091
1581
gobject.IO_IN | gobject.IO_HUP,
2092
1582
functools.partial(self.handle_ipc,
2093
parent_pipe =
2094
parent_pipe,
2095
proc = proc,
2096
client_object =
2097
client))
1583
parent_pipe = parent_pipe,
1584
client_object = client))
2098
1585
parent_pipe.send(True)
2099
# remove the old hook in favor of the new above hook on
2100
# same fileno
1586
# remove the old hook in favor of the new above hook on same fileno
2101
1587
return False
2102
1588
if command == 'funcall':
2103
1589
funcname = request[1]
2104
1590
args = request[2]
2105
1591
kwargs = request[3]
2106
1592
2107
parent_pipe.send(('data', getattr(client_object,
2108
funcname)(*args,
2109
**kwargs)))
2110
1593
parent_pipe.send(('data', getattr(client_object, funcname)(*args, **kwargs)))
1594
2111
1595
if command == 'getattr':
2112
1596
attrname = request[1]
2113
1597
if callable(client_object.__getattribute__(attrname)):
2114
1598
parent_pipe.send(('function',))
2115
1599
else:
2116
parent_pipe.send(('data', client_object
2117
.__getattribute__(attrname)))
1600
parent_pipe.send(('data', client_object.__getattribute__(attrname)))
2118
1601
2119
1602
if command == 'setattr':
2120
1603
attrname = request[1]
2121
1604
value = request[2]
2122
1605
setattr(client_object, attrname, value)
2123
1606
2124
1607
return True
2125
1608
2126
1609
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
2219
else:
2220
# No currently valid tokens were found
2221
raise ValueError("Invalid RFC 3339 duration")
2222
# End token found
2223
return value
2224
2225
2226
1610
def string_to_delta(interval):
2227
1611
"""Parse a string and return a datetime.timedelta
2228
1612
2239
1623
>>> string_to_delta('5m 30s')
2240
1624
datetime.timedelta(0, 330)
2241
1625
"""
2242
2243
try:
2244
return rfc3339_duration_to_delta(interval)
2245
except ValueError:
2246
pass
2247
2248
1626
timevalue = datetime.timedelta(0)
2249
1627
for s in interval.split():
2250
1628
try:
2251
suffix = s[-1]
1629
suffix = unicode(s[-1])
2252
1630
value = int(s[:-1])
2253
1631
if suffix == "d":
2254
1632
delta = datetime.timedelta(value)
2261
1639
elif suffix == "w":
2262
1640
delta = datetime.timedelta(0, 0, 0, 0, 0, 0, value)
2263
1641
else:
2264
raise ValueError("Unknown suffix {!r}"
2265
.format(suffix))
2266
except IndexError as e:
1642
raise ValueError("Unknown suffix %r" % suffix)
1643
except (ValueError, IndexError) as e:
2267
1644
raise ValueError(*(e.args))
2268
1645
timevalue += delta
2269
1646
return timevalue
2270
1647
2271
1648
1649
def if_nametoindex(interface):
1650
"""Call the C function if_nametoindex(), or equivalent
1651
1652
Note: This function cannot accept a unicode string."""
1653
global if_nametoindex
1654
try:
1655
if_nametoindex = (ctypes.cdll.LoadLibrary
1656
(ctypes.util.find_library("c"))
1657
.if_nametoindex)
1658
except (OSError, AttributeError):
1659
logger.warning("Doing if_nametoindex the hard way")
1660
def if_nametoindex(interface):
1661
"Get an interface index the hard way, i.e. using fcntl()"
1662
SIOCGIFINDEX = 0x8933 # From /usr/include/linux/sockios.h
1663
with contextlib.closing(socket.socket()) as s:
1664
ifreq = fcntl.ioctl(s, SIOCGIFINDEX,
1665
struct.pack(str("16s16x"),
1666
interface))
1667
interface_index = struct.unpack(str("I"),
1668
ifreq[16:20])[0]
1669
return interface_index
1670
return if_nametoindex(interface)
1671
1672
2272
1673
def daemon(nochdir = False, noclose = False):
2273
1674
"""See daemon(3). Standard BSD Unix function.
2274
1675
2282
1683
sys.exit()
2283
1684
if not noclose:
2284
1685
# Close all standard open file descriptors
2285
null = os.open(os.devnull, os.O_NOCTTY | os.O_RDWR)
1686
null = os.open(os.path.devnull, os.O_NOCTTY | os.O_RDWR)
2286
1687
if not stat.S_ISCHR(os.fstat(null).st_mode):
2287
raise OSError(errno.ENODEV, "{} not a character device"
2288
.format(os.devnull))
1688
raise OSError(errno.ENODEV,
1689
"%s not a character device"
1690
% os.path.devnull)
2289
1691
os.dup2(null, sys.stdin.fileno())
2290
1692
os.dup2(null, sys.stdout.fileno())
2291
1693
os.dup2(null, sys.stderr.fileno())
2300
1702
2301
1703
parser = argparse.ArgumentParser()
2302
1704
parser.add_argument("-v", "--version", action="version",
2303
version = "%(prog)s {}".format(version),
1705
version = "%%(prog)s %s" % version,
2304
1706
help="show version number and exit")
2305
1707
parser.add_argument("-i", "--interface", metavar="IF",
2306
1708
help="Bind to interface IF")
2312
1714
help="Run self-test")
2313
1715
parser.add_argument("--debug", action="store_true",
2314
1716
help="Debug mode; run in foreground and log"
2315
" to terminal", default=None)
1717
" to terminal")
2316
1718
parser.add_argument("--debuglevel", metavar="LEVEL",
2317
1719
help="Debug level for stdout output")
2318
1720
parser.add_argument("--priority", help="GnuTLS"
2325
1727
" files")
2326
1728
parser.add_argument("--no-dbus", action="store_false",
2327
1729
dest="use_dbus", help="Do not provide D-Bus"
2328
" system bus interface", default=None)
1730
" system bus interface")
2329
1731
parser.add_argument("--no-ipv6", action="store_false",
2330
dest="use_ipv6", help="Do not use IPv6",
2331
default=None)
2332
parser.add_argument("--no-restore", action="store_false",
2333
dest="restore", help="Do not restore stored"
2334
" state", default=None)
2335
parser.add_argument("--socket", type=int,
2336
help="Specify a file descriptor to a network"
2337
" socket to use instead of creating one")
2338
parser.add_argument("--statedir", metavar="DIR",
2339
help="Directory to save/restore state in")
2340
parser.add_argument("--foreground", action="store_true",
2341
help="Run in foreground", default=None)
2342
parser.add_argument("--no-zeroconf", action="store_false",
2343
dest="zeroconf", help="Do not use Zeroconf",
2344
default=None)
2345
1732
dest="use_ipv6", help="Do not use IPv6")
2346
1733
options = parser.parse_args()
2347
1734
2348
1735
if options.check:
2349
1736
import doctest
2350
fail_count, test_count = doctest.testmod()
2351
sys.exit(os.EX_OK if fail_count == 0 else 1)
1737
doctest.testmod()
1738
sys.exit()
2352
1739
2353
1740
# Default values for config file for server-global settings
2354
1741
server_defaults = { "interface": "",
2356
1743
"port": "",
2357
1744
"debug": "False",
2358
1745
"priority":
2359
"SECURE256:!CTYPE-X.509:+CTYPE-OPENPGP:+SIGN-RSA-SHA224:+SIGN-RSA-RMD160",
1746
"SECURE256:!CTYPE-X.509:+CTYPE-OPENPGP",
2360
1747
"servicename": "Mandos",
2361
1748
"use_dbus": "True",
2362
1749
"use_ipv6": "True",
2363
1750
"debuglevel": "",
2364
"restore": "True",
2365
"socket": "",
2366
"statedir": "/var/lib/mandos",
2367
"foreground": "False",
2368
"zeroconf": "True",
2369
1751
}
2370
1752
2371
1753
# Parse config file for server-global settings
2376
1758
# Convert the SafeConfigParser object to a dict
2377
1759
server_settings = server_config.defaults()
2378
1760
# Use the appropriate methods on the non-string config options
2379
for option in ("debug", "use_dbus", "use_ipv6", "foreground"):
1761
for option in ("debug", "use_dbus", "use_ipv6"):
2380
1762
server_settings[option] = server_config.getboolean("DEFAULT",
2381
1763
option)
2382
1764
if server_settings["port"]:
2383
1765
server_settings["port"] = server_config.getint("DEFAULT",
2384
1766
"port")
2385
if server_settings["socket"]:
2386
server_settings["socket"] = server_config.getint("DEFAULT",
2387
"socket")
2388
# Later, stdin will, and stdout and stderr might, be dup'ed
2389
# over with an opened os.devnull. But we don't want this to
2390
# happen with a supplied network socket.
2391
if 0 <= server_settings["socket"] <= 2:
2392
server_settings["socket"] = os.dup(server_settings
2393
["socket"])
2394
1767
del server_config
2395
1768
2396
1769
# Override the settings from the config file with command line
2397
1770
# options, if set.
2398
1771
for option in ("interface", "address", "port", "debug",
2399
1772
"priority", "servicename", "configdir",
2400
"use_dbus", "use_ipv6", "debuglevel", "restore",
2401
"statedir", "socket", "foreground", "zeroconf"):
1773
"use_dbus", "use_ipv6", "debuglevel"):
2402
1774
value = getattr(options, option)
2403
1775
if value is not None:
2404
1776
server_settings[option] = value
2405
1777
del options
2406
1778
# Force all strings to be unicode
2407
1779
for option in server_settings.keys():
2408
if isinstance(server_settings[option], bytes):
2409
server_settings[option] = (server_settings[option]
2410
.decode("utf-8"))
2411
# Force all boolean options to be boolean
2412
for option in ("debug", "use_dbus", "use_ipv6", "restore",
2413
"foreground", "zeroconf"):
2414
server_settings[option] = bool(server_settings[option])
2415
# Debug implies foreground
2416
if server_settings["debug"]:
2417
server_settings["foreground"] = True
1780
if type(server_settings[option]) is str:
1781
server_settings[option] = unicode(server_settings[option])
2418
1782
# Now we have our good server settings in "server_settings"
2419
1783
2420
1784
##################################################################
2421
1785
2422
if (not server_settings["zeroconf"] and
2423
not (server_settings["port"]
2424
or server_settings["socket"] != "")):
2425
parser.error("Needs port or socket to work without"
2426
" Zeroconf")
2427
2428
1786
# For convenience
2429
1787
debug = server_settings["debug"]
2430
1788
debuglevel = server_settings["debuglevel"]
2431
1789
use_dbus = server_settings["use_dbus"]
2432
1790
use_ipv6 = server_settings["use_ipv6"]
2433
stored_state_path = os.path.join(server_settings["statedir"],
2434
stored_state_file)
2435
foreground = server_settings["foreground"]
2436
zeroconf = server_settings["zeroconf"]
2437
2438
if debug:
2439
initlogger(debug, logging.DEBUG)
2440
else:
2441
if not debuglevel:
2442
initlogger(debug)
2443
else:
2444
level = getattr(logging, debuglevel.upper())
2445
initlogger(debug, level)
2446
1791
2447
1792
if server_settings["servicename"] != "Mandos":
2448
1793
syslogger.setFormatter(logging.Formatter
2449
('Mandos ({}) [%(process)d]:'
2450
' %(levelname)s: %(message)s'
2451
.format(server_settings
2452
["servicename"])))
1794
('Mandos (%s) [%%(process)d]:'
1795
' %%(levelname)s: %%(message)s'
1796
% server_settings["servicename"]))
2453
1797
2454
1798
# Parse config file with clients
2455
client_config = configparser.SafeConfigParser(Client
2456
.client_defaults)
1799
client_defaults = { "timeout": "1h",
1800
"interval": "5m",
1801
"checker": "fping -q -- %%(host)s",
1802
"host": "",
1803
"approval_delay": "0s",
1804
"approval_duration": "1s",
1805
}
1806
client_config = configparser.SafeConfigParser(client_defaults)
2457
1807
client_config.read(os.path.join(server_settings["configdir"],
2458
1808
"clients.conf"))
2459
1809
2460
1810
global mandos_dbus_service
2461
1811
mandos_dbus_service = None
2462
1812
2463
socketfd = None
2464
if server_settings["socket"] != "":
2465
socketfd = server_settings["socket"]
2466
1813
tcp_server = MandosServer((server_settings["address"],
2467
1814
server_settings["port"]),
2468
1815
ClientHandler,
2471
1818
use_ipv6=use_ipv6,
2472
1819
gnutls_priority=
2473
1820
server_settings["priority"],
2474
use_dbus=use_dbus,
2475
socketfd=socketfd)
2476
if not foreground:
2477
pidfilename = "/run/mandos.pid"
2478
if not os.path.isdir("/run/."):
2479
pidfilename = "/var/run/mandos.pid"
2480
pidfile = None
1821
use_dbus=use_dbus)
1822
if not debug:
1823
pidfilename = "/var/run/mandos.pid"
2481
1824
try:
2482
1825
pidfile = open(pidfilename, "w")
2483
except IOError as e:
2484
logger.error("Could not open file %r", pidfilename,
2485
exc_info=e)
1826
except IOError:
1827
logger.error("Could not open file %r", pidfilename)
2486
1828
2487
for name in ("_mandos", "mandos", "nobody"):
1829
try:
1830
uid = pwd.getpwnam("_mandos").pw_uid
1831
gid = pwd.getpwnam("_mandos").pw_gid
1832
except KeyError:
2488
1833
try:
2489
uid = pwd.getpwnam(name).pw_uid
2490
gid = pwd.getpwnam(name).pw_gid
2491
break
1834
uid = pwd.getpwnam("mandos").pw_uid
1835
gid = pwd.getpwnam("mandos").pw_gid
2492
1836
except KeyError:
2493
continue
2494
else:
2495
uid = 65534
2496
gid = 65534
1837
try:
1838
uid = pwd.getpwnam("nobody").pw_uid
1839
gid = pwd.getpwnam("nobody").pw_gid
1840
except KeyError:
1841
uid = 65534
1842
gid = 65534
2497
1843
try:
2498
1844
os.setgid(gid)
2499
1845
os.setuid(uid)
2500
1846
except OSError as error:
2501
if error.errno != errno.EPERM:
2502
raise
1847
if error[0] != errno.EPERM:
1848
raise error
2503
1849
1850
if not debug and not debuglevel:
1851
syslogger.setLevel(logging.WARNING)
1852
console.setLevel(logging.WARNING)
1853
if debuglevel:
1854
level = getattr(logging, debuglevel.upper())
1855
syslogger.setLevel(level)
1856
console.setLevel(level)
1857
2504
1858
if debug:
2505
1859
# Enable all possible GnuTLS debugging
2506
1860
2516
1870
.gnutls_global_set_log_function(debug_gnutls))
2517
1871
2518
1872
# Redirect stdin so all checkers get /dev/null
2519
null = os.open(os.devnull, os.O_NOCTTY | os.O_RDWR)
1873
null = os.open(os.path.devnull, os.O_NOCTTY | os.O_RDWR)
2520
1874
os.dup2(null, sys.stdin.fileno())
2521
1875
if null > 2:
2522
1876
os.close(null)
1877
else:
1878
# No console logging
1879
logger.removeHandler(console)
2523
1880
2524
1881
# Need to fork before connecting to D-Bus
2525
if not foreground:
1882
if not debug:
2526
1883
# Close all input and output, do double fork, etc.
2527
1884
daemon()
2528
1885
2529
# multiprocessing will use threads, so before we use gobject we
2530
# need to inform gobject that threads will be used.
2531
gobject.threads_init()
2532
2533
1886
global main_loop
2534
1887
# From the Avahi example code
2535
DBusGMainLoop(set_as_default=True)
1888
DBusGMainLoop(set_as_default=True )
2536
1889
main_loop = gobject.MainLoop()
2537
1890
bus = dbus.SystemBus()
2538
1891
# End of Avahi example code
2539
1892
if use_dbus:
2540
1893
try:
2541
bus_name = dbus.service.BusName("se.recompile.Mandos",
1894
bus_name = dbus.service.BusName("se.bsnet.fukt.Mandos",
2542
1895
bus, do_not_queue=True)
2543
old_bus_name = (dbus.service.BusName
2544
("se.bsnet.fukt.Mandos", bus,
2545
do_not_queue=True))
2546
1896
except dbus.exceptions.NameExistsException as e:
2547
logger.error("Disabling D-Bus:", exc_info=e)
1897
logger.error(unicode(e) + ", disabling D-Bus")
2548
1898
use_dbus = False
2549
1899
server_settings["use_dbus"] = False
2550
1900
tcp_server.use_dbus = False
2551
if zeroconf:
2552
protocol = avahi.PROTO_INET6 if use_ipv6 else avahi.PROTO_INET
2553
service = AvahiServiceToSyslog(name =
2554
server_settings["servicename"],
2555
servicetype = "_mandos._tcp",
2556
protocol = protocol, bus = bus)
2557
if server_settings["interface"]:
2558
service.interface = (if_nametoindex
2559
(server_settings["interface"]
2560
.encode("utf-8")))
1901
protocol = avahi.PROTO_INET6 if use_ipv6 else avahi.PROTO_INET
1902
service = AvahiService(name = server_settings["servicename"],
1903
servicetype = "_mandos._tcp",
1904
protocol = protocol, bus = bus)
1905
if server_settings["interface"]:
1906
service.interface = (if_nametoindex
1907
(str(server_settings["interface"])))
2561
1908
2562
1909
global multiprocessing_manager
2563
1910
multiprocessing_manager = multiprocessing.Manager()
2565
1912
client_class = Client
2566
1913
if use_dbus:
2567
1914
client_class = functools.partial(ClientDBus, bus = bus)
2568
2569
client_settings = Client.config_parser(client_config)
2570
old_client_settings = {}
2571
clients_data = {}
2572
2573
# This is used to redirect stdout and stderr for checker processes
2574
global wnull
2575
wnull = open(os.devnull, "w") # A writable /dev/null
2576
# Only used if server is running in foreground but not in debug
2577
# mode
2578
if debug or not foreground:
2579
wnull.close()
2580
2581
# Get client data and settings from last running state.
2582
if server_settings["restore"]:
2583
try:
2584
with open(stored_state_path, "rb") as stored_state:
2585
clients_data, old_client_settings = (pickle.load
2586
(stored_state))
2587
os.remove(stored_state_path)
2588
except IOError as e:
2589
if e.errno == errno.ENOENT:
2590
logger.warning("Could not load persistent state: {}"
2591
.format(os.strerror(e.errno)))
2592
else:
2593
logger.critical("Could not load persistent state:",
2594
exc_info=e)
2595
raise
2596
except EOFError as e:
2597
logger.warning("Could not load persistent state: "
2598
"EOFError:", exc_info=e)
2599
2600
with PGPEngine() as pgp:
2601
for client_name, client in clients_data.items():
2602
# Skip removed clients
2603
if client_name not in client_settings:
2604
continue
2605
2606
# Decide which value to use after restoring saved state.
2607
# We have three different values: Old config file,
2608
# new config file, and saved state.
2609
# New config value takes precedence if it differs from old
2610
# config value, otherwise use saved state.
2611
for name, value in client_settings[client_name].items():
2612
try:
2613
# For each value in new config, check if it
2614
# differs from the old config value (Except for
2615
# the "secret" attribute)
2616
if (name != "secret" and
2617
value != old_client_settings[client_name]
2618
[name]):
2619
client[name] = value
2620
except KeyError:
2621
pass
2622
2623
# Clients who has passed its expire date can still be
2624
# enabled if its last checker was successful. Clients
2625
# whose checker succeeded before we stored its state is
2626
# assumed to have successfully run all checkers during
2627
# downtime.
2628
if client["enabled"]:
2629
if datetime.datetime.utcnow() >= client["expires"]:
2630
if not client["last_checked_ok"]:
2631
logger.warning(
2632
"disabling client {} - Client never "
2633
"performed a successful checker"
2634
.format(client_name))
2635
client["enabled"] = False
2636
elif client["last_checker_status"] != 0:
2637
logger.warning(
2638
"disabling client {} - Client last"
2639
" checker failed with error code {}"
2640
.format(client_name,
2641
client["last_checker_status"]))
2642
client["enabled"] = False
2643
else:
2644
client["expires"] = (datetime.datetime
2645
.utcnow()
2646
+ client["timeout"])
2647
logger.debug("Last checker succeeded,"
2648
" keeping {} enabled"
2649
.format(client_name))
1915
def client_config_items(config, section):
1916
special_settings = {
1917
"approved_by_default":
1918
lambda: config.getboolean(section,
1919
"approved_by_default"),
1920
}
1921
for name, value in config.items(section):
2650
1922
try:
2651
client["secret"] = (
2652
pgp.decrypt(client["encrypted_secret"],
2653
client_settings[client_name]
2654
["secret"]))
2655
except PGPError:
2656
# If decryption fails, we use secret from new settings
2657
logger.debug("Failed to decrypt {} old secret"
2658
.format(client_name))
2659
client["secret"] = (
2660
client_settings[client_name]["secret"])
2661
2662
# Add/remove clients based on new changes made to config
2663
for client_name in (set(old_client_settings)
2664
- set(client_settings)):
2665
del clients_data[client_name]
2666
for client_name in (set(client_settings)
2667
- set(old_client_settings)):
2668
clients_data[client_name] = client_settings[client_name]
2669
2670
# Create all client objects
2671
for client_name, client in clients_data.items():
2672
tcp_server.clients[client_name] = client_class(
2673
name = client_name, settings = client,
2674
server_settings = server_settings)
2675
1923
yield (name, special_settings[name]())
1924
except KeyError:
1925
yield (name, value)
1926
1927
tcp_server.clients.update(set(
1928
client_class(name = section,
1929
config= dict(client_config_items(
1930
client_config, section)))
1931
for section in client_config.sections()))
2676
1932
if not tcp_server.clients:
2677
1933
logger.warning("No clients defined")
2678
2679
if not foreground:
2680
if pidfile is not None:
2681
try:
2682
with pidfile:
2683
pid = os.getpid()
2684
pidfile.write("{}\n".format(pid).encode("utf-8"))
2685
except IOError:
2686
logger.error("Could not write to file %r with PID %d",
2687
pidfilename, pid)
2688
del pidfile
1934
1935
if not debug:
1936
try:
1937
with pidfile:
1938
pid = os.getpid()
1939
pidfile.write(str(pid) + "\n".encode("utf-8"))
1940
del pidfile
1941
except IOError:
1942
logger.error("Could not write to file %r with PID %d",
1943
pidfilename, pid)
1944
except NameError:
1945
# "pidfile" was never created
1946
pass
2689
1947
del pidfilename
2690
1948
1949
signal.signal(signal.SIGINT, signal.SIG_IGN)
1950
2691
1951
signal.signal(signal.SIGHUP, lambda signum, frame: sys.exit())
2692
1952
signal.signal(signal.SIGTERM, lambda signum, frame: sys.exit())
2693
1953
2694
1954
if use_dbus:
2695
@alternate_dbus_interfaces({"se.recompile.Mandos":
2696
"se.bsnet.fukt.Mandos"})
2697
class MandosDBusService(DBusObjectWithProperties):
1955
class MandosDBusService(dbus.service.Object):
2698
1956
"""A D-Bus proxy object"""
2699
1957
def __init__(self):
2700
1958
dbus.service.Object.__init__(self, bus, "/")
2701
_interface = "se.recompile.Mandos"
2702
2703
@dbus_interface_annotations(_interface)
2704
def _foo(self):
2705
return { "org.freedesktop.DBus.Property"
2706
".EmitsChangedSignal":
2707
"false"}
1959
_interface = "se.bsnet.fukt.Mandos"
2708
1960
2709
1961
@dbus.service.signal(_interface, signature="o")
2710
1962
def ClientAdded(self, objpath):
2725
1977
def GetAllClients(self):
2726
1978
"D-Bus method"
2727
1979
return dbus.Array(c.dbus_object_path
2728
for c in
2729
tcp_server.clients.itervalues())
1980
for c in tcp_server.clients)
2730
1981
2731
1982
@dbus.service.method(_interface,
2732
1983
out_signature="a{oa{sv}}")
2733
1984
def GetAllClientsWithProperties(self):
2734
1985
"D-Bus method"
2735
1986
return dbus.Dictionary(
2736
{ c.dbus_object_path: c.GetAll("")
2737
for c in tcp_server.clients.itervalues() },
1987
((c.dbus_object_path, c.GetAll(""))
1988
for c in tcp_server.clients),
2738
1989
signature="oa{sv}")
2739
1990
2740
1991
@dbus.service.method(_interface, in_signature="o")
2741
1992
def RemoveClient(self, object_path):
2742
1993
"D-Bus method"
2743
for c in tcp_server.clients.itervalues():
1994
for c in tcp_server.clients:
2744
1995
if c.dbus_object_path == object_path:
2745
del tcp_server.clients[c.name]
1996
tcp_server.clients.remove(c)
2746
1997
c.remove_from_connection()
2747
1998
# Don't signal anything except ClientRemoved
2748
1999
c.disable(quiet=True)
2757
2008
2758
2009
def cleanup():
2759
2010
"Cleanup function; run on exit"
2760
if zeroconf:
2761
service.cleanup()
2762
2763
multiprocessing.active_children()
2764
wnull.close()
2765
if not (tcp_server.clients or client_settings):
2766
return
2767
2768
# Store client before exiting. Secrets are encrypted with key
2769
# based on what config file has. If config file is
2770
# removed/edited, old secret will thus be unrecovable.
2771
clients = {}
2772
with PGPEngine() as pgp:
2773
for client in tcp_server.clients.itervalues():
2774
key = client_settings[client.name]["secret"]
2775
client.encrypted_secret = pgp.encrypt(client.secret,
2776
key)
2777
client_dict = {}
2778
2779
# A list of attributes that can not be pickled
2780
# + secret.
2781
exclude = { "bus", "changedstate", "secret",
2782
"checker", "server_settings" }
2783
for name, typ in (inspect.getmembers
2784
(dbus.service.Object)):
2785
exclude.add(name)
2786
2787
client_dict["encrypted_secret"] = (client
2788
.encrypted_secret)
2789
for attr in client.client_structure:
2790
if attr not in exclude:
2791
client_dict[attr] = getattr(client, attr)
2792
2793
clients[client.name] = client_dict
2794
del client_settings[client.name]["secret"]
2795
2796
try:
2797
with (tempfile.NamedTemporaryFile
2798
(mode='wb', suffix=".pickle", prefix='clients-',
2799
dir=os.path.dirname(stored_state_path),
2800
delete=False)) as stored_state:
2801
pickle.dump((clients, client_settings), stored_state)
2802
tempname=stored_state.name
2803
os.rename(tempname, stored_state_path)
2804
except (IOError, OSError) as e:
2805
if not debug:
2806
try:
2807
os.remove(tempname)
2808
except NameError:
2809
pass
2810
if e.errno in (errno.ENOENT, errno.EACCES, errno.EEXIST):
2811
logger.warning("Could not save persistent state: {}"
2812
.format(os.strerror(e.errno)))
2813
else:
2814
logger.warning("Could not save persistent state:",
2815
exc_info=e)
2816
raise
2817
2818
# Delete all clients, and settings from config
2011
service.cleanup()
2012
2819
2013
while tcp_server.clients:
2820
name, client = tcp_server.clients.popitem()
2014
client = tcp_server.clients.pop()
2821
2015
if use_dbus:
2822
2016
client.remove_from_connection()
2017
client.disable_hook = None
2823
2018
# Don't signal anything except ClientRemoved
2824
2019
client.disable(quiet=True)
2825
2020
if use_dbus:
2826
2021
# Emit D-Bus signal
2827
mandos_dbus_service.ClientRemoved(client
2828
.dbus_object_path,
2022
mandos_dbus_service.ClientRemoved(client.dbus_object_path,
2829
2023
client.name)
2830
client_settings.clear()
2831
2024
2832
2025
atexit.register(cleanup)
2833
2026
2834
for client in tcp_server.clients.itervalues():
2027
for client in tcp_server.clients:
2835
2028
if use_dbus:
2836
2029
# Emit D-Bus signal
2837
2030
mandos_dbus_service.ClientAdded(client.dbus_object_path)
2838
# Need to initiate checking of clients
2839
if client.enabled:
2840
client.init_checker()
2031
client.enable()
2841
2032
2842
2033
tcp_server.enable()
2843
2034
tcp_server.server_activate()
2844
2035
2845
2036
# Find out what port we got
2846
if zeroconf:
2847
service.port = tcp_server.socket.getsockname()[1]
2037
service.port = tcp_server.socket.getsockname()[1]
2848
2038
if use_ipv6:
2849
2039
logger.info("Now listening on address %r, port %d,"
2850
" flowinfo %d, scope_id %d",
2851
*tcp_server.socket.getsockname())
2040
" flowinfo %d, scope_id %d"
2041
% tcp_server.socket.getsockname())
2852
2042
else: # IPv4
2853
logger.info("Now listening on address %r, port %d",
2854
*tcp_server.socket.getsockname())
2043
logger.info("Now listening on address %r, port %d"
2044
% tcp_server.socket.getsockname())
2855
2045
2856
2046
#service.interface = tcp_server.socket.getsockname()[3]
2857
2047
2858
2048
try:
2859
if zeroconf:
2860
# From the Avahi example code
2861
try:
2862
service.activate()
2863
except dbus.exceptions.DBusException as error:
2864
logger.critical("D-Bus Exception", exc_info=error)
2865
cleanup()
2866
sys.exit(1)
2867
# End of Avahi example code
2049
# From the Avahi example code
2050
try:
2051
service.activate()
2052
except dbus.exceptions.DBusException as error:
2053
logger.critical("DBusException: %s", error)
2054
cleanup()
2055
sys.exit(1)
2056
# End of Avahi example code
2868
2057
2869
2058
gobject.io_add_watch(tcp_server.fileno(), gobject.IO_IN,
2870
2059
lambda *args, **kwargs:
2874
2063
logger.debug("Starting main loop")
2875
2064
main_loop.run()
2876
2065
except AvahiError as error:
2877
logger.critical("Avahi Error", exc_info=error)
2066
logger.critical("AvahiError: %s", error)
2878
2067
cleanup()
2879
2068
sys.exit(1)
2880
2069
except KeyboardInterrupt:
Loggerhead is a web-based interface for Breezy
Version: 2.0.2.dev0