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- Committer: Teddy Hogeborn
- Date: 2015-03-10 18:03:38 UTC
- Revision ID: teddy@recompile.se-20150310180338-pcxw6r2qmw9k6br9
Add ":!RSA" to GnuTLS priority string, to disallow non-DHE kx.
If Mandos was somehow made to use a non-ephemeral Diffie-Hellman key
exchange algorithm in the TLS handshake, any saved network traffic
could then be decrypted later if the Mandos client key was obtained.
By default, Mandos uses ephemeral DH key exchanges which does not have
this problem, but a non-ephemeral key exchange algorithm was still
enabled by default. The simplest solution is to simply turn that off,
which ensures that Mandos will always use ephemeral DH key exchanges.
There is a "PFS" priority string specifier, but we can't use it because:
1. Security-wise, it is a mix between "NORMAL" and "SECURE128" - it
enables a lot more algorithms than "SECURE256".
2. It is only available since GnuTLS 3.2.4.
Thanks to Andreas Fischer <af@bantuX.org> for reporting this issue.
If Mandos was somehow made to use a non-ephemeral Diffie-Hellman key
exchange algorithm in the TLS handshake, any saved network traffic
could then be decrypted later if the Mandos client key was obtained.
By default, Mandos uses ephemeral DH key exchanges which does not have
this problem, but a non-ephemeral key exchange algorithm was still
enabled by default. The simplest solution is to simply turn that off,
which ensures that Mandos will always use ephemeral DH key exchanges.
There is a "PFS" priority string specifier, but we can't use it because:
1. Security-wise, it is a mix between "NORMAL" and "SECURE128" - it
enables a lot more algorithms than "SECURE256".
2. It is only available since GnuTLS 3.2.4.
Thanks to Andreas Fischer <af@bantuX.org> for reporting this issue.
- files added:
- debian/mandos-client.examples
- debian/upstream
- network-hooks.d
- files modified:
- .bzrignore
added
removed
mandos
1
#!/usr/bin/python
1
#!/usr/bin/python2.7
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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 © 2008-2011 Teddy Hogeborn
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# Copyright © 2008-2011 Björn Påhlsson
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# Copyright © 2008-2014 Teddy Hogeborn
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# Copyright © 2008-2014 Björn Påhlsson
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#
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# This program is free software: you can redistribute it and/or modify
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# it under the terms of the GNU General Public License as published by
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# along with this program. If not, see
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# <http://www.gnu.org/licenses/>.
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#
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# Contact the authors at <mandos@fukt.bsnet.se>.
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# Contact the authors at <mandos@recompile.se>.
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#
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from __future__ import (division, 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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import dbus
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import dbus.service
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except ImportError:
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SO_BINDTODEVICE = None
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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:'
94
' %(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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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)
104
except (OSError, AttributeError):
105
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:'
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' %(message)s'))
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logger.addHandler(syslogger)
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if debug:
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console = logging.StreamHandler()
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console.setFormatter(logging.Formatter('%(asctime)s %(name)s'
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' [%(process)d]:'
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' %(levelname)s:'
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' %(message)s'))
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logger.addHandler(console)
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logger.setLevel(level)
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class PGPError(Exception):
139
"""Exception if encryption/decryption fails"""
140
pass
141
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class PGPEngine(object):
144
"""A simple class for OpenPGP symmetric encryption & decryption"""
145
def __init__(self):
146
self.tempdir = tempfile.mkdtemp(prefix="mandos-")
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self.gnupgargs = ['--batch',
148
'--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):
154
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
182
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,
199
stderr = subprocess.PIPE)
200
ciphertext, err = proc.communicate(input = data)
201
if proc.returncode != 0:
202
raise PGPError(err)
203
return ciphertext
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def decrypt(self, data, password):
206
passphrase = self.password_encode(password)
207
with tempfile.NamedTemporaryFile(dir = self.tempdir
208
) as passfile:
209
passfile.write(passphrase)
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passfile.flush()
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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:
221
raise PGPError(err)
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return decrypted_plaintext
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class AvahiError(Exception):
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def __init__(self, value, *args, **kwargs):
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self.value = value
106
super(AvahiError, self).__init__(value, *args, **kwargs)
107
def __unicode__(self):
108
return unicode(repr(self.value))
228
return super(AvahiError, self).__init__(value, *args,
229
**kwargs)
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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 <http://www.dns-sd.org/ServiceTypes.html>
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See <https://www.iana.org/assignments/service-names-port-numbers>
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port: integer; what port to announce
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TXT: list of strings; TXT record for the service
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domain: string; Domain to publish on, default to .local if empty.
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server: D-Bus Server
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bus: dbus.SystemBus()
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"""
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137
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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
155
def rename(self):
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def rename(self, remove=True):
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"""Derived from the Avahi example code"""
157
280
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)
161
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raise AvahiServiceError("Too many renames")
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self.name = unicode(self.server.GetAlternativeServiceName(self.name))
285
self.name = str(self.server
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.GetAlternativeServiceName(self.name))
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self.rename_count += 1
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logger.info("Changing Zeroconf service name to %r ...",
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self.name)
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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()
290
if remove:
291
self.remove()
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292
try:
171
293
self.add()
172
294
except dbus.exceptions.DBusException as error:
173
logger.critical("DBusException: %s", error)
174
self.cleanup()
175
os._exit(1)
176
self.rename_count += 1
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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def remove(self):
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"""Derived from the Avahi example code"""
179
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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()
311
184
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def add(self):
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"""Derived from the Avahi example code"""
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self.remove()
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avahi.DBUS_INTERFACE_ENTRY_GROUP)
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self.entry_group_state_changed_match = (
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self.group.connect_to_signal(
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'StateChanged', self .entry_group_state_changed))
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'StateChanged', self.entry_group_state_changed))
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logger.debug("Adding Zeroconf service '%s' of type '%s' ...",
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self.name, self.type)
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self.group.AddService(
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dbus.UInt16(self.port),
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avahi.string_array_to_txt_array(self.TXT))
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self.group.Commit()
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def entry_group_state_changed(self, state, error):
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"""Derived from the Avahi example code"""
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logger.debug("Avahi entry group state change: %i", state)
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343
self.rename()
215
344
elif state == avahi.ENTRY_GROUP_FAILURE:
216
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logger.critical("Avahi: Error in group state changed %s",
217
unicode(error))
218
raise AvahiGroupError("State changed: %s"
219
% unicode(error))
346
str(error))
347
raise AvahiGroupError("State changed: {!s}"
348
.format(error))
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220
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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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353
try:
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self.group.Free()
225
355
except (dbus.exceptions.UnknownMethodException,
226
dbus.exceptions.DBusException) as e:
356
dbus.exceptions.DBusException):
227
357
pass
228
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self.group = None
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self.remove()
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def server_state_changed(self, state, error=None):
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"""Derived from the Avahi example code"""
232
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logger.debug("Avahi server state change: %i", state)
251
382
logger.debug("Unknown state: %r", state)
252
383
else:
253
384
logger.debug("Unknown state: %r: %r", state, error)
385
254
386
def activate(self):
255
387
"""Derived from the Avahi example code"""
256
388
if self.server is None:
264
396
self.server_state_changed(self.server.GetState())
265
397
266
398
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
267
410
class Client(object):
268
411
"""A representation of a client host served by this server.
269
412
270
413
Attributes:
271
_approved: bool(); 'None' if not yet approved/disapproved
414
approved: bool(); 'None' if not yet approved/disapproved
272
415
approval_delay: datetime.timedelta(); Time to wait for approval
273
416
approval_duration: datetime.timedelta(); Duration of one approval
274
417
checker: subprocess.Popen(); a running checker process used
281
424
instance %(name)s can be used in the command.
282
425
checker_initiator_tag: a gobject event source tag, or None
283
426
created: datetime.datetime(); (UTC) object creation
427
client_structure: Object describing what attributes a client has
428
and is used for storing the client at exit
284
429
current_checker_command: string; current running checker_command
285
disable_hook: If set, called by disable() as disable_hook(self)
286
430
disable_initiator_tag: a gobject event source tag, or None
287
431
enabled: bool()
288
432
fingerprint: string (40 or 32 hexadecimal digits); used to
291
435
interval: datetime.timedelta(); How often to start a new checker
292
436
last_approval_request: datetime.datetime(); (UTC) or None
293
437
last_checked_ok: datetime.datetime(); (UTC) or None
294
last_enabled: datetime.datetime(); (UTC)
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
295
442
name: string; from the config file, used in log messages and
296
443
D-Bus identifiers
297
444
secret: bytestring; sent verbatim (over TLS) to client
298
445
timeout: datetime.timedelta(); How long from last_checked_ok
299
446
until this client is disabled
447
extended_timeout: extra long timeout when secret has been sent
300
448
runtime_expansions: Allowed attributes for runtime expansion.
449
expires: datetime.datetime(); time (UTC) when a client will be
450
disabled, or None
451
server_settings: The server_settings dict from main()
301
452
"""
302
453
303
454
runtime_expansions = ("approval_delay", "approval_duration",
304
"created", "enabled", "fingerprint",
305
"host", "interval", "last_checked_ok",
455
"created", "enabled", "expires",
456
"fingerprint", "host", "interval",
457
"last_approval_request", "last_checked_ok",
306
458
"last_enabled", "name", "timeout")
459
client_defaults = { "timeout": "PT5M",
460
"extended_timeout": "PT15M",
461
"interval": "PT2M",
462
"checker": "fping -q -- %%(host)s",
463
"host": "",
464
"approval_delay": "PT0S",
465
"approval_duration": "PT1S",
466
"approved_by_default": "True",
467
"enabled": "True",
468
}
307
469
308
470
@staticmethod
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."""
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):
330
521
self.name = name
331
if config is None:
332
config = {}
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
333
539
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(" ", ""))
339
540
logger.debug(" Fingerprint: %s", self.fingerprint)
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
541
self.created = settings.get("created",
542
datetime.datetime.utcnow())
543
544
# attributes specific for this server instance
359
545
self.checker = None
360
546
self.checker_initiator_tag = None
361
547
self.disable_initiator_tag = None
362
548
self.checker_callback_tag = None
363
self.checker_command = config["checker"]
364
549
self.current_checker_command = None
365
self.last_connect = None
366
self._approved = None
367
self.approved_by_default = config.get("approved_by_default",
368
True)
550
self.approved = None
369
551
self.approvals_pending = 0
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())
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)
375
566
567
# Send notice to process children that client state has changed
376
568
def send_changedstate(self):
377
self.changedstate.acquire()
378
self.changedstate.notify_all()
379
self.changedstate.release()
380
569
with self.changedstate:
570
self.changedstate.notify_all()
571
381
572
def enable(self):
382
573
"""Start this client's checker and timeout hooks"""
383
574
if getattr(self, "enabled", False):
384
575
# Already enabled
385
576
return
386
self.send_changedstate()
577
self.expires = datetime.datetime.utcnow() + self.timeout
578
self.enabled = True
387
579
self.last_enabled = datetime.datetime.utcnow()
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()
580
self.init_checker()
581
self.send_changedstate()
400
582
401
583
def disable(self, quiet=True):
402
584
"""Disable this client."""
403
585
if not getattr(self, "enabled", False):
404
586
return False
405
587
if not quiet:
406
self.send_changedstate()
407
if not quiet:
408
588
logger.info("Disabling client %s", self.name)
409
if getattr(self, "disable_initiator_tag", False):
589
if getattr(self, "disable_initiator_tag", None) is not None:
410
590
gobject.source_remove(self.disable_initiator_tag)
411
591
self.disable_initiator_tag = None
412
if getattr(self, "checker_initiator_tag", False):
592
self.expires = None
593
if getattr(self, "checker_initiator_tag", None) is not None:
413
594
gobject.source_remove(self.checker_initiator_tag)
414
595
self.checker_initiator_tag = None
415
596
self.stop_checker()
416
if self.disable_hook:
417
self.disable_hook(self)
418
597
self.enabled = False
598
if not quiet:
599
self.send_changedstate()
419
600
# Do not run this again if called by a gobject.timeout_add
420
601
return False
421
602
422
603
def __del__(self):
423
self.disable_hook = None
424
604
self.disable()
425
605
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
426
625
def checker_callback(self, pid, condition, command):
427
626
"""The checker has completed, so take appropriate actions."""
428
627
self.checker_callback_tag = None
429
628
self.checker = None
430
629
if os.WIFEXITED(condition):
431
exitstatus = os.WEXITSTATUS(condition)
432
if exitstatus == 0:
630
self.last_checker_status = os.WEXITSTATUS(condition)
631
if self.last_checker_status == 0:
433
632
logger.info("Checker for %(name)s succeeded",
434
633
vars(self))
435
634
self.checked_ok()
437
636
logger.info("Checker for %(name)s failed",
438
637
vars(self))
439
638
else:
639
self.last_checker_status = -1
440
640
logger.warning("Checker for %(name)s crashed?",
441
641
vars(self))
442
642
443
643
def checked_ok(self):
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
"""
644
"""Assert that the client has been seen, alive and well."""
449
645
self.last_checked_ok = datetime.datetime.utcnow()
450
gobject.source_remove(self.disable_initiator_tag)
451
self.disable_initiator_tag = (gobject.timeout_add
452
(self.timeout_milliseconds(),
453
self.disable))
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
454
661
455
662
def need_approval(self):
456
663
self.last_approval_request = datetime.datetime.utcnow()
461
668
If a checker already exists, leave it running and do
462
669
nothing."""
463
670
# The reason for not killing a running checker is that if we
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
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
468
675
# checkers alone, the checker would have to take more time
469
676
# than 'timeout' for the client to be disabled, which is as it
470
677
# should be.
472
679
# If a checker exists, make sure it is not a zombie
473
680
try:
474
681
pid, status = os.waitpid(self.checker.pid, os.WNOHANG)
475
except (AttributeError, OSError) as error:
476
if (isinstance(error, OSError)
477
and error.errno != errno.ECHILD):
478
raise error
682
except AttributeError:
683
pass
684
except OSError as error:
685
if error.errno != errno.ECHILD:
686
raise
479
687
else:
480
688
if pid:
481
689
logger.warning("Checker was a zombie")
484
692
self.current_checker_command)
485
693
# Start a new checker if needed
486
694
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 }
487
699
try:
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
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
506
705
self.current_checker_command = command
507
706
try:
508
707
logger.info("Starting checker %r for %s",
511
710
# in normal mode, that is already done by daemon(),
512
711
# and in debug mode we don't want to. (Stdin is
513
712
# 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 })
514
721
self.checker = subprocess.Popen(command,
515
722
close_fds=True,
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.
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:
523
736
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)
527
737
except OSError as error:
528
logger.error("Failed to start subprocess: %s",
529
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)
530
747
# Re-run this periodically if run by gobject.timeout_add
531
748
return True
532
749
539
756
return
540
757
logger.debug("Stopping checker for %(name)s", vars(self))
541
758
try:
542
os.kill(self.checker.pid, signal.SIGTERM)
759
self.checker.terminate()
543
760
#time.sleep(0.5)
544
761
#if self.checker.poll() is None:
545
# os.kill(self.checker.pid, signal.SIGKILL)
762
# self.checker.kill()
546
763
except OSError as error:
547
764
if error.errno != errno.ESRCH: # No such process
548
765
raise
549
766
self.checker = None
550
767
768
551
769
def dbus_service_property(dbus_interface, signature="v",
552
770
access="readwrite", byte_arrays=False):
553
771
"""Decorators for marking methods of a DBusObjectWithProperties to
564
782
# "Set" method, so we fail early here:
565
783
if byte_arrays and signature != "ay":
566
784
raise ValueError("Byte arrays not supported for non-'ay'"
567
" signature %r" % signature)
785
" signature {!r}".format(signature))
568
786
def decorator(func):
569
787
func._dbus_is_property = True
570
788
func._dbus_interface = dbus_interface
578
796
return decorator
579
797
580
798
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
581
836
class DBusPropertyException(dbus.exceptions.DBusException):
582
837
"""A base class for D-Bus property-related exceptions
583
838
"""
584
def __unicode__(self):
585
return unicode(str(self))
586
839
pass
587
840
588
841
class DBusPropertyAccessException(DBusPropertyException):
589
842
"""A property's access permissions disallows an operation.
599
852
600
853
class DBusObjectWithProperties(dbus.service.Object):
601
854
"""A D-Bus object with properties.
602
855
603
856
Classes inheriting from this can use the dbus_service_property
604
857
decorator to expose methods as D-Bus properties. It exposes the
605
858
standard Get(), Set(), and GetAll() methods on the D-Bus.
606
859
"""
607
860
608
861
@staticmethod
609
def _is_dbus_property(obj):
610
return getattr(obj, "_dbus_is_property", False)
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)
611
870
612
def _get_all_dbus_properties(self):
871
def _get_all_dbus_things(self, thing):
613
872
"""Returns a generator of (name, attribute) pairs
614
873
"""
615
return ((prop._dbus_name, prop)
616
for name, prop in
617
inspect.getmembers(self, self._is_dbus_property))
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)))
618
881
619
882
def _get_dbus_property(self, interface_name, property_name):
620
883
"""Returns a bound method if one exists which is a D-Bus
621
884
property with the specified name and interface.
622
885
"""
623
for name in (property_name,
624
property_name + "_dbus_property"):
625
prop = getattr(self, name, None)
626
if (prop is None
627
or not self._is_dbus_property(prop)
628
or prop._dbus_name != property_name
629
or (interface_name and prop._dbus_interface
630
and interface_name != prop._dbus_interface)):
631
continue
632
return prop
886
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
633
894
# No such property
634
895
raise DBusPropertyNotFound(self.dbus_object_path + ":"
635
896
+ interface_name + "."
659
920
# The byte_arrays option is not supported yet on
660
921
# signatures other than "ay".
661
922
if prop._dbus_signature != "ay":
662
raise ValueError
663
value = dbus.ByteArray(''.join(unichr(byte)
664
for byte in value))
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))
665
928
prop(value)
666
929
667
930
@dbus.service.method(dbus.PROPERTIES_IFACE, in_signature="s",
669
932
def GetAll(self, interface_name):
670
933
"""Standard D-Bus property GetAll() method, see D-Bus
671
934
standard.
672
935
673
936
Note: Will not include properties with access="write".
674
937
"""
675
all = {}
676
for name, prop in self._get_all_dbus_properties():
938
properties = {}
939
for name, prop in self._get_all_dbus_things("property"):
677
940
if (interface_name
678
941
and interface_name != prop._dbus_interface):
679
942
# Interface non-empty but did not match
683
946
continue
684
947
value = prop()
685
948
if not hasattr(value, "variant_level"):
686
all[name] = value
949
properties[name] = value
687
950
continue
688
all[name] = type(value)(value, variant_level=
689
value.variant_level+1)
690
return dbus.Dictionary(all, signature="sv")
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
691
962
692
963
@dbus.service.method(dbus.INTROSPECTABLE_IFACE,
693
964
out_signature="s",
694
965
path_keyword='object_path',
695
966
connection_keyword='connection')
696
967
def Introspect(self, object_path, connection):
697
"""Standard D-Bus method, overloaded to insert property tags.
968
"""Overloading of standard D-Bus method.
969
970
Inserts property tags and interface annotation tags.
698
971
"""
699
972
xmlstring = dbus.service.Object.Introspect(self, object_path,
700
973
connection)
707
980
e.setAttribute("access", prop._dbus_access)
708
981
return e
709
982
for if_tag in document.getElementsByTagName("interface"):
983
# Add property tags
710
984
for tag in (make_tag(document, name, prop)
711
985
for name, prop
712
in self._get_all_dbus_properties()
986
in self._get_all_dbus_things("property")
713
987
if prop._dbus_interface
714
988
== if_tag.getAttribute("name")):
715
989
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)
716
1021
# Add the names to the return values for the
717
1022
# "org.freedesktop.DBus.Properties" methods
718
1023
if (if_tag.getAttribute("name")
733
1038
except (AttributeError, xml.dom.DOMException,
734
1039
xml.parsers.expat.ExpatError) as error:
735
1040
logger.error("Failed to override Introspection method",
736
error)
1041
exc_info=error)
737
1042
return xmlstring
738
1043
739
1044
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"})
740
1224
class ClientDBus(Client, DBusObjectWithProperties):
741
1225
"""A Client class using D-Bus
742
1226
748
1232
runtime_expansions = (Client.runtime_expansions
749
1233
+ ("dbus_object_path",))
750
1234
1235
_interface = "se.recompile.Mandos.Client"
1236
751
1237
# dbus.service.Object doesn't use super(), so we can't either.
752
1238
753
1239
def __init__(self, bus = None, *args, **kwargs):
754
self._approvals_pending = 0
755
1240
self.bus = bus
756
1241
Client.__init__(self, *args, **kwargs)
757
1242
# Only now, when this client is initialized, can it show up on
758
1243
# the D-Bus
759
client_object_name = unicode(self.name).translate(
1244
client_object_name = str(self.name).translate(
760
1245
{ord("."): ord("_"),
761
1246
ord("-"): ord("_")})
762
1247
self.dbus_object_path = (dbus.ObjectPath
763
1248
("/clients/" + client_object_name))
764
1249
DBusObjectWithProperties.__init__(self, self.bus,
765
1250
self.dbus_object_path)
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
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
810
1334
811
1335
def __del__(self, *args, **kwargs):
812
1336
try:
821
1345
*args, **kwargs):
822
1346
self.checker_callback_tag = None
823
1347
self.checker = None
824
# Emit D-Bus signal
825
self.PropertyChanged(dbus.String("CheckerRunning"),
826
dbus.Boolean(False, variant_level=1))
827
1348
if os.WIFEXITED(condition):
828
1349
exitstatus = os.WEXITSTATUS(condition)
829
1350
# Emit D-Bus signal
839
1360
return Client.checker_callback(self, pid, condition, command,
840
1361
*args, **kwargs)
841
1362
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
859
1363
def start_checker(self, *args, **kwargs):
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
1364
old_checker_pid = getattr(self.checker, "pid", None)
865
1365
r = Client.start_checker(self, *args, **kwargs)
866
1366
# Only if new checker process was started
867
1367
if (self.checker is not None
868
1368
and old_checker_pid != self.checker.pid):
869
1369
# Emit D-Bus signal
870
1370
self.CheckerStarted(self.current_checker_command)
871
self.PropertyChanged(
872
dbus.String("CheckerRunning"),
873
dbus.Boolean(True, variant_level=1))
874
1371
return r
875
1372
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
885
1373
def _reset_approved(self):
886
self._approved = None
1374
self.approved = None
887
1375
return False
888
1376
889
1377
def approve(self, value=True):
1378
self.approved = value
1379
gobject.timeout_add(int(self.approval_duration.total_seconds()
1380
* 1000), self._reset_approved)
890
1381
self.send_changedstate()
891
self._approved = value
892
gobject.timeout_add(self._timedelta_to_milliseconds
893
(self.approval_duration),
894
self._reset_approved)
895
896
1382
897
1383
## D-Bus methods, signals & properties
898
_interface = "se.bsnet.fukt.Mandos.Client"
1384
1385
## Interfaces
899
1386
900
1387
## Signals
901
1388
912
1399
pass
913
1400
914
1401
# PropertyChanged - signal
1402
@dbus_annotations({"org.freedesktop.DBus.Deprecated": "true"})
915
1403
@dbus.service.signal(_interface, signature="sv")
916
1404
def PropertyChanged(self, property, value):
917
1405
"D-Bus signal"
987
1475
if value is None: # get
988
1476
return dbus.Boolean(self.approved_by_default)
989
1477
self.approved_by_default = bool(value)
990
# Emit D-Bus signal
991
self.PropertyChanged(dbus.String("ApprovedByDefault"),
992
dbus.Boolean(value, variant_level=1))
993
1478
994
1479
# ApprovalDelay - property
995
1480
@dbus_service_property(_interface, signature="t",
996
1481
access="readwrite")
997
1482
def ApprovalDelay_dbus_property(self, value=None):
998
1483
if value is None: # get
999
return dbus.UInt64(self.approval_delay_milliseconds())
1484
return dbus.UInt64(self.approval_delay.total_seconds()
1485
* 1000)
1000
1486
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))
1004
1487
1005
1488
# ApprovalDuration - property
1006
1489
@dbus_service_property(_interface, signature="t",
1007
1490
access="readwrite")
1008
1491
def ApprovalDuration_dbus_property(self, value=None):
1009
1492
if value is None: # get
1010
return dbus.UInt64(self._timedelta_to_milliseconds(
1011
self.approval_duration))
1493
return dbus.UInt64(self.approval_duration.total_seconds()
1494
* 1000)
1012
1495
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))
1016
1496
1017
1497
# Name - property
1018
1498
@dbus_service_property(_interface, signature="s", access="read")
1030
1510
def Host_dbus_property(self, value=None):
1031
1511
if value is None: # get
1032
1512
return dbus.String(self.host)
1033
self.host = value
1034
# Emit D-Bus signal
1035
self.PropertyChanged(dbus.String("Host"),
1036
dbus.String(value, variant_level=1))
1513
self.host = str(value)
1037
1514
1038
1515
# Created - property
1039
1516
@dbus_service_property(_interface, signature="s", access="read")
1040
1517
def Created_dbus_property(self):
1041
return dbus.String(self._datetime_to_dbus(self.created))
1518
return datetime_to_dbus(self.created)
1042
1519
1043
1520
# LastEnabled - property
1044
1521
@dbus_service_property(_interface, signature="s", access="read")
1045
1522
def LastEnabled_dbus_property(self):
1046
if self.last_enabled is None:
1047
return dbus.String("")
1048
return dbus.String(self._datetime_to_dbus(self.last_enabled))
1523
return datetime_to_dbus(self.last_enabled)
1049
1524
1050
1525
# Enabled - property
1051
1526
@dbus_service_property(_interface, signature="b",
1065
1540
if value is not None:
1066
1541
self.checked_ok()
1067
1542
return
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))
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)
1072
1555
1073
1556
# LastApprovalRequest - property
1074
1557
@dbus_service_property(_interface, signature="s", access="read")
1075
1558
def LastApprovalRequest_dbus_property(self):
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))
1559
return datetime_to_dbus(self.last_approval_request)
1081
1560
1082
1561
# Timeout - property
1083
1562
@dbus_service_property(_interface, signature="t",
1084
1563
access="readwrite")
1085
1564
def Timeout_dbus_property(self, value=None):
1086
1565
if value is None: # get
1087
return dbus.UInt64(self.timeout_milliseconds())
1566
return dbus.UInt64(self.timeout.total_seconds() * 1000)
1567
old_timeout = self.timeout
1088
1568
self.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))
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)
1109
1594
1110
1595
# Interval - property
1111
1596
@dbus_service_property(_interface, signature="t",
1112
1597
access="readwrite")
1113
1598
def Interval_dbus_property(self, value=None):
1114
1599
if value is None: # get
1115
return dbus.UInt64(self.interval_milliseconds())
1600
return dbus.UInt64(self.interval.total_seconds() * 1000)
1116
1601
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))
1120
1602
if getattr(self, "checker_initiator_tag", None) is None:
1121
1603
return
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
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
1128
1611
# Checker - property
1129
1612
@dbus_service_property(_interface, signature="s",
1130
1613
access="readwrite")
1131
1614
def Checker_dbus_property(self, value=None):
1132
1615
if value is None: # get
1133
1616
return dbus.String(self.checker_command)
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))
1617
self.checker_command = str(value)
1139
1618
1140
1619
# CheckerRunning - property
1141
1620
@dbus_service_property(_interface, signature="b",
1157
1636
@dbus_service_property(_interface, signature="ay",
1158
1637
access="write", byte_arrays=True)
1159
1638
def Secret_dbus_property(self, value):
1160
self.secret = str(value)
1639
self.secret = bytes(value)
1161
1640
1162
1641
del _interface
1163
1642
1168
1647
self._pipe.send(('init', fpr, address))
1169
1648
if not self._pipe.recv():
1170
1649
raise KeyError()
1171
1650
1172
1651
def __getattribute__(self, name):
1173
if(name == '_pipe'):
1652
if name == '_pipe':
1174
1653
return super(ProxyClient, self).__getattribute__(name)
1175
1654
self._pipe.send(('getattr', name))
1176
1655
data = self._pipe.recv()
1181
1660
self._pipe.send(('funcall', name, args, kwargs))
1182
1661
return self._pipe.recv()[1]
1183
1662
return func
1184
1663
1185
1664
def __setattr__(self, name, value):
1186
if(name == '_pipe'):
1665
if name == '_pipe':
1187
1666
return super(ProxyClient, self).__setattr__(name, value)
1188
1667
self._pipe.send(('setattr', name, value))
1189
1668
1197
1676
def handle(self):
1198
1677
with contextlib.closing(self.server.child_pipe) as child_pipe:
1199
1678
logger.info("TCP connection from: %s",
1200
unicode(self.client_address))
1679
str(self.client_address))
1201
1680
logger.debug("Pipe FD: %d",
1202
1681
self.server.child_pipe.fileno())
1203
1682
1204
1683
session = (gnutls.connection
1205
1684
.ClientSession(self.request,
1206
1685
gnutls.connection
1207
1686
.X509Credentials()))
1208
1687
1209
1688
# Note: gnutls.connection.X509Credentials is really a
1210
1689
# generic GnuTLS certificate credentials object so long as
1211
1690
# no X.509 keys are added to it. Therefore, we can use it
1212
1691
# here despite using OpenPGP certificates.
1213
1692
1214
1693
#priority = ':'.join(("NONE", "+VERS-TLS1.1",
1215
1694
# "+AES-256-CBC", "+SHA1",
1216
1695
# "+COMP-NULL", "+CTYPE-OPENPGP",
1222
1701
(gnutls.library.functions
1223
1702
.gnutls_priority_set_direct(session._c_object,
1224
1703
priority, None))
1225
1704
1226
1705
# Start communication using the Mandos protocol
1227
1706
# Get protocol number
1228
1707
line = self.request.makefile().readline()
1229
1708
logger.debug("Protocol version: %r", line)
1230
1709
try:
1231
1710
if int(line.strip().split()[0]) > 1:
1232
raise RuntimeError
1711
raise RuntimeError(line)
1233
1712
except (ValueError, IndexError, RuntimeError) as error:
1234
1713
logger.error("Unknown protocol version: %s", error)
1235
1714
return
1236
1715
1237
1716
# Start GnuTLS connection
1238
1717
try:
1239
1718
session.handshake()
1243
1722
# established. Just abandon the request.
1244
1723
return
1245
1724
logger.debug("Handshake succeeded")
1246
1725
1247
1726
approval_required = False
1248
1727
try:
1249
1728
try:
1254
1733
logger.warning("Bad certificate: %s", error)
1255
1734
return
1256
1735
logger.debug("Fingerprint: %s", fpr)
1257
1736
1258
1737
try:
1259
1738
client = ProxyClient(child_pipe, fpr,
1260
1739
self.client_address)
1272
1751
client.name)
1273
1752
if self.server.use_dbus:
1274
1753
# Emit D-Bus signal
1275
client.Rejected("Disabled")
1754
client.Rejected("Disabled")
1276
1755
return
1277
1756
1278
if client._approved or not client.approval_delay:
1757
if client.approved or not client.approval_delay:
1279
1758
#We are approved or approval is disabled
1280
1759
break
1281
elif client._approved is None:
1760
elif client.approved is None:
1282
1761
logger.info("Client %s needs approval",
1283
1762
client.name)
1284
1763
if self.server.use_dbus:
1285
1764
# Emit D-Bus signal
1286
1765
client.NeedApproval(
1287
client.approval_delay_milliseconds(),
1288
client.approved_by_default)
1766
client.approval_delay.total_seconds()
1767
* 1000, client.approved_by_default)
1289
1768
else:
1290
1769
logger.warning("Client %s was not approved",
1291
1770
client.name)
1295
1774
return
1296
1775
1297
1776
#wait until timeout or approved
1298
#x = float(client._timedelta_to_milliseconds(delay))
1299
1777
time = datetime.datetime.now()
1300
1778
client.changedstate.acquire()
1301
client.changedstate.wait(float(client._timedelta_to_milliseconds(delay) / 1000))
1779
client.changedstate.wait(delay.total_seconds())
1302
1780
client.changedstate.release()
1303
1781
time2 = datetime.datetime.now()
1304
1782
if (time2 - time) >= delay:
1320
1798
try:
1321
1799
sent = session.send(client.secret[sent_size:])
1322
1800
except gnutls.errors.GNUTLSError as error:
1323
logger.warning("gnutls send failed")
1801
logger.warning("gnutls send failed",
1802
exc_info=error)
1324
1803
return
1325
1804
logger.debug("Sent: %d, remaining: %d",
1326
1805
sent, len(client.secret)
1327
1806
- (sent_size + sent))
1328
1807
sent_size += sent
1329
1808
1330
1809
logger.info("Sending secret to %s", client.name)
1331
# bump the timeout as if seen
1332
client.checked_ok()
1810
# bump the timeout using extended_timeout
1811
client.bump_timeout(client.extended_timeout)
1333
1812
if self.server.use_dbus:
1334
1813
# Emit D-Bus signal
1335
1814
client.GotSecret()
1340
1819
try:
1341
1820
session.bye()
1342
1821
except gnutls.errors.GNUTLSError as error:
1343
logger.warning("GnuTLS bye failed")
1822
logger.warning("GnuTLS bye failed",
1823
exc_info=error)
1344
1824
1345
1825
@staticmethod
1346
1826
def peer_certificate(session):
1402
1882
# Convert the buffer to a Python bytestring
1403
1883
fpr = ctypes.string_at(buf, buf_len.value)
1404
1884
# Convert the bytestring to hexadecimal notation
1405
hex_fpr = ''.join("%02X" % ord(char) for char in fpr)
1885
hex_fpr = binascii.hexlify(fpr).upper()
1406
1886
return hex_fpr
1407
1887
1408
1888
1411
1891
def sub_process_main(self, request, address):
1412
1892
try:
1413
1893
self.finish_request(request, address)
1414
except:
1894
except Exception:
1415
1895
self.handle_error(request, address)
1416
1896
self.close_request(request)
1417
1897
1418
1898
def process_request(self, request, address):
1419
1899
"""Start a new process to process the request."""
1420
multiprocessing.Process(target = self.sub_process_main,
1421
args = (request, address)).start()
1900
proc = multiprocessing.Process(target = self.sub_process_main,
1901
args = (request, address))
1902
proc.start()
1903
return proc
1904
1422
1905
1423
1906
class MultiprocessingMixInWithPipe(MultiprocessingMixIn, object):
1424
1907
""" adds a pipe to the MixIn """
1428
1911
This function creates a new pipe in self.pipe
1429
1912
"""
1430
1913
parent_pipe, self.child_pipe = multiprocessing.Pipe()
1431
1432
super(MultiprocessingMixInWithPipe,
1433
self).process_request(request, client_address)
1914
1915
proc = MultiprocessingMixIn.process_request(self, request,
1916
client_address)
1434
1917
self.child_pipe.close()
1435
self.add_pipe(parent_pipe)
1436
1437
def add_pipe(self, parent_pipe):
1918
self.add_pipe(parent_pipe, proc)
1919
1920
def add_pipe(self, parent_pipe, proc):
1438
1921
"""Dummy function; override as necessary"""
1439
raise NotImplementedError
1922
raise NotImplementedError()
1923
1440
1924
1441
1925
class IPv6_TCPServer(MultiprocessingMixInWithPipe,
1442
1926
socketserver.TCPServer, object):
1448
1932
use_ipv6: Boolean; to use IPv6 or not
1449
1933
"""
1450
1934
def __init__(self, server_address, RequestHandlerClass,
1451
interface=None, use_ipv6=True):
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
"""
1452
1939
self.interface = interface
1453
1940
if use_ipv6:
1454
1941
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.
1455
1968
socketserver.TCPServer.__init__(self, server_address,
1456
1969
RequestHandlerClass)
1970
1457
1971
def server_bind(self):
1458
1972
"""This overrides the normal server_bind() function
1459
1973
to bind to an interface if one was specified, and also NOT to
1467
1981
try:
1468
1982
self.socket.setsockopt(socket.SOL_SOCKET,
1469
1983
SO_BINDTODEVICE,
1470
str(self.interface
1471
+ '\0'))
1984
(self.interface + "\0")
1985
.encode("utf-8"))
1472
1986
except socket.error as error:
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:
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:
1478
1991
logger.error("SO_BINDTODEVICE not available;"
1479
1992
" cannot bind to interface %s",
1480
1993
self.interface)
1994
elif error.errno == errno.ENODEV:
1995
logger.error("Interface %s does not exist,"
1996
" cannot bind", self.interface)
1481
1997
else:
1482
1998
raise
1483
1999
# Only bind(2) the socket if we really need to.
1486
2002
if self.address_family == socket.AF_INET6:
1487
2003
any_address = "::" # in6addr_any
1488
2004
else:
1489
any_address = socket.INADDR_ANY
2005
any_address = "0.0.0.0" # INADDR_ANY
1490
2006
self.server_address = (any_address,
1491
2007
self.server_address[1])
1492
2008
elif not self.server_address[1]:
1513
2029
"""
1514
2030
def __init__(self, server_address, RequestHandlerClass,
1515
2031
interface=None, use_ipv6=True, clients=None,
1516
gnutls_priority=None, use_dbus=True):
2032
gnutls_priority=None, use_dbus=True, socketfd=None):
1517
2033
self.enabled = False
1518
2034
self.clients = clients
1519
2035
if self.clients is None:
1520
self.clients = set()
2036
self.clients = {}
1521
2037
self.use_dbus = use_dbus
1522
2038
self.gnutls_priority = gnutls_priority
1523
2039
IPv6_TCPServer.__init__(self, server_address,
1524
2040
RequestHandlerClass,
1525
2041
interface = interface,
1526
use_ipv6 = use_ipv6)
2042
use_ipv6 = use_ipv6,
2043
socketfd = socketfd)
1527
2044
def server_activate(self):
1528
2045
if self.enabled:
1529
2046
return socketserver.TCPServer.server_activate(self)
2047
1530
2048
def enable(self):
1531
2049
self.enabled = True
1532
def add_pipe(self, parent_pipe):
2050
2051
def add_pipe(self, parent_pipe, proc):
1533
2052
# Call "handle_ipc" for both data and EOF events
1534
2053
gobject.io_add_watch(parent_pipe.fileno(),
1535
2054
gobject.IO_IN | gobject.IO_HUP,
1536
2055
functools.partial(self.handle_ipc,
1537
parent_pipe = parent_pipe))
1538
2056
parent_pipe =
2057
parent_pipe,
2058
proc = proc))
2059
1539
2060
def handle_ipc(self, source, condition, parent_pipe=None,
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):
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()
1557
2066
return False
1558
2067
1559
2068
# Read a request from the child
1564
2073
fpr = request[1]
1565
2074
address = request[2]
1566
2075
1567
for c in self.clients:
2076
for c in self.clients.itervalues():
1568
2077
if c.fingerprint == fpr:
1569
2078
client = c
1570
2079
break
1573
2082
"dress: %s", fpr, address)
1574
2083
if self.use_dbus:
1575
2084
# Emit D-Bus signal
1576
mandos_dbus_service.ClientNotFound(fpr, address[0])
2085
mandos_dbus_service.ClientNotFound(fpr,
2086
address[0])
1577
2087
parent_pipe.send(False)
1578
2088
return False
1579
2089
1580
2090
gobject.io_add_watch(parent_pipe.fileno(),
1581
2091
gobject.IO_IN | gobject.IO_HUP,
1582
2092
functools.partial(self.handle_ipc,
1583
parent_pipe = parent_pipe,
1584
client_object = client))
2093
parent_pipe =
2094
parent_pipe,
2095
proc = proc,
2096
client_object =
2097
client))
1585
2098
parent_pipe.send(True)
1586
# remove the old hook in favor of the new above hook on same fileno
2099
# remove the old hook in favor of the new above hook on
2100
# same fileno
1587
2101
return False
1588
2102
if command == 'funcall':
1589
2103
funcname = request[1]
1590
2104
args = request[2]
1591
2105
kwargs = request[3]
1592
2106
1593
parent_pipe.send(('data', getattr(client_object, funcname)(*args, **kwargs)))
1594
2107
parent_pipe.send(('data', getattr(client_object,
2108
funcname)(*args,
2109
**kwargs)))
2110
1595
2111
if command == 'getattr':
1596
2112
attrname = request[1]
1597
2113
if callable(client_object.__getattribute__(attrname)):
1598
2114
parent_pipe.send(('function',))
1599
2115
else:
1600
parent_pipe.send(('data', client_object.__getattribute__(attrname)))
2116
parent_pipe.send(('data', client_object
2117
.__getattribute__(attrname)))
1601
2118
1602
2119
if command == 'setattr':
1603
2120
attrname = request[1]
1604
2121
value = request[2]
1605
2122
setattr(client_object, attrname, value)
1606
2123
1607
2124
return True
1608
2125
1609
2126
2127
def rfc3339_duration_to_delta(duration):
2128
"""Parse an RFC 3339 "duration" and return a datetime.timedelta
2129
2130
>>> rfc3339_duration_to_delta("P7D")
2131
datetime.timedelta(7)
2132
>>> rfc3339_duration_to_delta("PT60S")
2133
datetime.timedelta(0, 60)
2134
>>> rfc3339_duration_to_delta("PT60M")
2135
datetime.timedelta(0, 3600)
2136
>>> rfc3339_duration_to_delta("PT24H")
2137
datetime.timedelta(1)
2138
>>> rfc3339_duration_to_delta("P1W")
2139
datetime.timedelta(7)
2140
>>> rfc3339_duration_to_delta("PT5M30S")
2141
datetime.timedelta(0, 330)
2142
>>> rfc3339_duration_to_delta("P1DT3M20S")
2143
datetime.timedelta(1, 200)
2144
"""
2145
2146
# Parsing an RFC 3339 duration with regular expressions is not
2147
# possible - there would have to be multiple places for the same
2148
# values, like seconds. The current code, while more esoteric, is
2149
# cleaner without depending on a parsing library. If Python had a
2150
# built-in library for parsing we would use it, but we'd like to
2151
# avoid excessive use of external libraries.
2152
2153
# New type for defining tokens, syntax, and semantics all-in-one
2154
Token = collections.namedtuple("Token",
2155
("regexp", # To match token; if
2156
# "value" is not None,
2157
# must have a "group"
2158
# containing digits
2159
"value", # datetime.timedelta or
2160
# None
2161
"followers")) # Tokens valid after
2162
# this token
2163
# RFC 3339 "duration" tokens, syntax, and semantics; taken from
2164
# the "duration" ABNF definition in RFC 3339, Appendix A.
2165
token_end = Token(re.compile(r"$"), None, frozenset())
2166
token_second = Token(re.compile(r"(\d+)S"),
2167
datetime.timedelta(seconds=1),
2168
frozenset((token_end,)))
2169
token_minute = Token(re.compile(r"(\d+)M"),
2170
datetime.timedelta(minutes=1),
2171
frozenset((token_second, token_end)))
2172
token_hour = Token(re.compile(r"(\d+)H"),
2173
datetime.timedelta(hours=1),
2174
frozenset((token_minute, token_end)))
2175
token_time = Token(re.compile(r"T"),
2176
None,
2177
frozenset((token_hour, token_minute,
2178
token_second)))
2179
token_day = Token(re.compile(r"(\d+)D"),
2180
datetime.timedelta(days=1),
2181
frozenset((token_time, token_end)))
2182
token_month = Token(re.compile(r"(\d+)M"),
2183
datetime.timedelta(weeks=4),
2184
frozenset((token_day, token_end)))
2185
token_year = Token(re.compile(r"(\d+)Y"),
2186
datetime.timedelta(weeks=52),
2187
frozenset((token_month, token_end)))
2188
token_week = Token(re.compile(r"(\d+)W"),
2189
datetime.timedelta(weeks=1),
2190
frozenset((token_end,)))
2191
token_duration = Token(re.compile(r"P"), None,
2192
frozenset((token_year, token_month,
2193
token_day, token_time,
2194
token_week)))
2195
# Define starting values
2196
value = datetime.timedelta() # Value so far
2197
found_token = None
2198
followers = frozenset((token_duration,)) # Following valid tokens
2199
s = duration # String left to parse
2200
# Loop until end token is found
2201
while found_token is not token_end:
2202
# Search for any currently valid tokens
2203
for token in followers:
2204
match = token.regexp.match(s)
2205
if match is not None:
2206
# Token found
2207
if token.value is not None:
2208
# Value found, parse digits
2209
factor = int(match.group(1), 10)
2210
# Add to value so far
2211
value += factor * token.value
2212
# Strip token from string
2213
s = token.regexp.sub("", s, 1)
2214
# Go to found token
2215
found_token = token
2216
# Set valid next tokens
2217
followers = found_token.followers
2218
break
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
1610
2226
def string_to_delta(interval):
1611
2227
"""Parse a string and return a datetime.timedelta
1612
2228
1623
2239
>>> string_to_delta('5m 30s')
1624
2240
datetime.timedelta(0, 330)
1625
2241
"""
2242
2243
try:
2244
return rfc3339_duration_to_delta(interval)
2245
except ValueError:
2246
pass
2247
1626
2248
timevalue = datetime.timedelta(0)
1627
2249
for s in interval.split():
1628
2250
try:
1629
suffix = unicode(s[-1])
2251
suffix = s[-1]
1630
2252
value = int(s[:-1])
1631
2253
if suffix == "d":
1632
2254
delta = datetime.timedelta(value)
1639
2261
elif suffix == "w":
1640
2262
delta = datetime.timedelta(0, 0, 0, 0, 0, 0, value)
1641
2263
else:
1642
raise ValueError("Unknown suffix %r" % suffix)
1643
except (ValueError, IndexError) as e:
2264
raise ValueError("Unknown suffix {!r}"
2265
.format(suffix))
2266
except IndexError as e:
1644
2267
raise ValueError(*(e.args))
1645
2268
timevalue += delta
1646
2269
return timevalue
1647
2270
1648
2271
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
1673
2272
def daemon(nochdir = False, noclose = False):
1674
2273
"""See daemon(3). Standard BSD Unix function.
1675
2274
1683
2282
sys.exit()
1684
2283
if not noclose:
1685
2284
# Close all standard open file descriptors
1686
null = os.open(os.path.devnull, os.O_NOCTTY | os.O_RDWR)
2285
null = os.open(os.devnull, os.O_NOCTTY | os.O_RDWR)
1687
2286
if not stat.S_ISCHR(os.fstat(null).st_mode):
1688
raise OSError(errno.ENODEV,
1689
"%s not a character device"
1690
% os.path.devnull)
2287
raise OSError(errno.ENODEV, "{} not a character device"
2288
.format(os.devnull))
1691
2289
os.dup2(null, sys.stdin.fileno())
1692
2290
os.dup2(null, sys.stdout.fileno())
1693
2291
os.dup2(null, sys.stderr.fileno())
1702
2300
1703
2301
parser = argparse.ArgumentParser()
1704
2302
parser.add_argument("-v", "--version", action="version",
1705
version = "%%(prog)s %s" % version,
2303
version = "%(prog)s {}".format(version),
1706
2304
help="show version number and exit")
1707
2305
parser.add_argument("-i", "--interface", metavar="IF",
1708
2306
help="Bind to interface IF")
1714
2312
help="Run self-test")
1715
2313
parser.add_argument("--debug", action="store_true",
1716
2314
help="Debug mode; run in foreground and log"
1717
" to terminal")
2315
" to terminal", default=None)
1718
2316
parser.add_argument("--debuglevel", metavar="LEVEL",
1719
2317
help="Debug level for stdout output")
1720
2318
parser.add_argument("--priority", help="GnuTLS"
1727
2325
" files")
1728
2326
parser.add_argument("--no-dbus", action="store_false",
1729
2327
dest="use_dbus", help="Do not provide D-Bus"
1730
" system bus interface")
2328
" system bus interface", default=None)
1731
2329
parser.add_argument("--no-ipv6", action="store_false",
1732
dest="use_ipv6", help="Do not use IPv6")
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
1733
2346
options = parser.parse_args()
1734
2347
1735
2348
if options.check:
1736
2349
import doctest
1737
doctest.testmod()
1738
sys.exit()
2350
fail_count, test_count = doctest.testmod()
2351
sys.exit(os.EX_OK if fail_count == 0 else 1)
1739
2352
1740
2353
# Default values for config file for server-global settings
1741
2354
server_defaults = { "interface": "",
1743
2356
"port": "",
1744
2357
"debug": "False",
1745
2358
"priority":
1746
"SECURE256:!CTYPE-X.509:+CTYPE-OPENPGP",
2359
"SECURE256:!CTYPE-X.509:+CTYPE-OPENPGP:!RSA"
2360
":+SIGN-RSA-SHA224:+SIGN-RSA-RMD160",
1747
2361
"servicename": "Mandos",
1748
2362
"use_dbus": "True",
1749
2363
"use_ipv6": "True",
1750
2364
"debuglevel": "",
2365
"restore": "True",
2366
"socket": "",
2367
"statedir": "/var/lib/mandos",
2368
"foreground": "False",
2369
"zeroconf": "True",
1751
2370
}
1752
2371
1753
2372
# Parse config file for server-global settings
1758
2377
# Convert the SafeConfigParser object to a dict
1759
2378
server_settings = server_config.defaults()
1760
2379
# Use the appropriate methods on the non-string config options
1761
for option in ("debug", "use_dbus", "use_ipv6"):
2380
for option in ("debug", "use_dbus", "use_ipv6", "foreground"):
1762
2381
server_settings[option] = server_config.getboolean("DEFAULT",
1763
2382
option)
1764
2383
if server_settings["port"]:
1765
2384
server_settings["port"] = server_config.getint("DEFAULT",
1766
2385
"port")
2386
if server_settings["socket"]:
2387
server_settings["socket"] = server_config.getint("DEFAULT",
2388
"socket")
2389
# Later, stdin will, and stdout and stderr might, be dup'ed
2390
# over with an opened os.devnull. But we don't want this to
2391
# happen with a supplied network socket.
2392
if 0 <= server_settings["socket"] <= 2:
2393
server_settings["socket"] = os.dup(server_settings
2394
["socket"])
1767
2395
del server_config
1768
2396
1769
2397
# Override the settings from the config file with command line
1770
2398
# options, if set.
1771
2399
for option in ("interface", "address", "port", "debug",
1772
2400
"priority", "servicename", "configdir",
1773
"use_dbus", "use_ipv6", "debuglevel"):
2401
"use_dbus", "use_ipv6", "debuglevel", "restore",
2402
"statedir", "socket", "foreground", "zeroconf"):
1774
2403
value = getattr(options, option)
1775
2404
if value is not None:
1776
2405
server_settings[option] = value
1777
2406
del options
1778
2407
# Force all strings to be unicode
1779
2408
for option in server_settings.keys():
1780
if type(server_settings[option]) is str:
1781
server_settings[option] = unicode(server_settings[option])
2409
if isinstance(server_settings[option], bytes):
2410
server_settings[option] = (server_settings[option]
2411
.decode("utf-8"))
2412
# Force all boolean options to be boolean
2413
for option in ("debug", "use_dbus", "use_ipv6", "restore",
2414
"foreground", "zeroconf"):
2415
server_settings[option] = bool(server_settings[option])
2416
# Debug implies foreground
2417
if server_settings["debug"]:
2418
server_settings["foreground"] = True
1782
2419
# Now we have our good server settings in "server_settings"
1783
2420
1784
2421
##################################################################
1785
2422
2423
if (not server_settings["zeroconf"] and
2424
not (server_settings["port"]
2425
or server_settings["socket"] != "")):
2426
parser.error("Needs port or socket to work without"
2427
" Zeroconf")
2428
1786
2429
# For convenience
1787
2430
debug = server_settings["debug"]
1788
2431
debuglevel = server_settings["debuglevel"]
1789
2432
use_dbus = server_settings["use_dbus"]
1790
2433
use_ipv6 = server_settings["use_ipv6"]
1791
2434
stored_state_path = os.path.join(server_settings["statedir"],
2435
stored_state_file)
2436
foreground = server_settings["foreground"]
2437
zeroconf = server_settings["zeroconf"]
2438
2439
if debug:
2440
initlogger(debug, logging.DEBUG)
2441
else:
2442
if not debuglevel:
2443
initlogger(debug)
2444
else:
2445
level = getattr(logging, debuglevel.upper())
2446
initlogger(debug, level)
2447
1792
2448
if server_settings["servicename"] != "Mandos":
1793
2449
syslogger.setFormatter(logging.Formatter
1794
('Mandos (%s) [%%(process)d]:'
1795
' %%(levelname)s: %%(message)s'
1796
% server_settings["servicename"]))
2450
('Mandos ({}) [%(process)d]:'
2451
' %(levelname)s: %(message)s'
2452
.format(server_settings
2453
["servicename"])))
1797
2454
1798
2455
# Parse config file with clients
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)
2456
client_config = configparser.SafeConfigParser(Client
2457
.client_defaults)
1807
2458
client_config.read(os.path.join(server_settings["configdir"],
1808
2459
"clients.conf"))
1809
2460
1810
2461
global mandos_dbus_service
1811
2462
mandos_dbus_service = None
1812
2463
2464
socketfd = None
2465
if server_settings["socket"] != "":
2466
socketfd = server_settings["socket"]
1813
2467
tcp_server = MandosServer((server_settings["address"],
1814
2468
server_settings["port"]),
1815
2469
ClientHandler,
1818
2472
use_ipv6=use_ipv6,
1819
2473
gnutls_priority=
1820
2474
server_settings["priority"],
1821
use_dbus=use_dbus)
1822
if not debug:
1823
pidfilename = "/var/run/mandos.pid"
2475
use_dbus=use_dbus,
2476
socketfd=socketfd)
2477
if not foreground:
2478
pidfilename = "/run/mandos.pid"
2479
if not os.path.isdir("/run/."):
2480
pidfilename = "/var/run/mandos.pid"
2481
pidfile = None
1824
2482
try:
1825
2483
pidfile = open(pidfilename, "w")
1826
except IOError:
1827
logger.error("Could not open file %r", pidfilename)
2484
except IOError as e:
2485
logger.error("Could not open file %r", pidfilename,
2486
exc_info=e)
1828
2487
1829
try:
1830
uid = pwd.getpwnam("_mandos").pw_uid
1831
gid = pwd.getpwnam("_mandos").pw_gid
1832
except KeyError:
2488
for name in ("_mandos", "mandos", "nobody"):
1833
2489
try:
1834
uid = pwd.getpwnam("mandos").pw_uid
1835
gid = pwd.getpwnam("mandos").pw_gid
2490
uid = pwd.getpwnam(name).pw_uid
2491
gid = pwd.getpwnam(name).pw_gid
2492
break
1836
2493
except KeyError:
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
2494
continue
2495
else:
2496
uid = 65534
2497
gid = 65534
1843
2498
try:
1844
2499
os.setgid(gid)
1845
2500
os.setuid(uid)
1846
2501
except OSError as error:
1847
if error[0] != errno.EPERM:
1848
raise error
2502
if error.errno != errno.EPERM:
2503
raise
1849
2504
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
1858
2505
if debug:
1859
2506
# Enable all possible GnuTLS debugging
1860
2507
1870
2517
.gnutls_global_set_log_function(debug_gnutls))
1871
2518
1872
2519
# Redirect stdin so all checkers get /dev/null
1873
null = os.open(os.path.devnull, os.O_NOCTTY | os.O_RDWR)
2520
null = os.open(os.devnull, os.O_NOCTTY | os.O_RDWR)
1874
2521
os.dup2(null, sys.stdin.fileno())
1875
2522
if null > 2:
1876
2523
os.close(null)
1877
else:
1878
# No console logging
1879
logger.removeHandler(console)
1880
2524
1881
2525
# Need to fork before connecting to D-Bus
1882
if not debug:
2526
if not foreground:
1883
2527
# Close all input and output, do double fork, etc.
1884
2528
daemon()
1885
2529
2530
# multiprocessing will use threads, so before we use gobject we
2531
# need to inform gobject that threads will be used.
2532
gobject.threads_init()
2533
1886
2534
global main_loop
1887
2535
# From the Avahi example code
1888
DBusGMainLoop(set_as_default=True )
2536
DBusGMainLoop(set_as_default=True)
1889
2537
main_loop = gobject.MainLoop()
1890
2538
bus = dbus.SystemBus()
1891
2539
# End of Avahi example code
1892
2540
if use_dbus:
1893
2541
try:
1894
bus_name = dbus.service.BusName("se.bsnet.fukt.Mandos",
2542
bus_name = dbus.service.BusName("se.recompile.Mandos",
1895
2543
bus, do_not_queue=True)
2544
old_bus_name = (dbus.service.BusName
2545
("se.bsnet.fukt.Mandos", bus,
2546
do_not_queue=True))
1896
2547
except dbus.exceptions.NameExistsException as e:
1897
logger.error(unicode(e) + ", disabling D-Bus")
2548
logger.error("Disabling D-Bus:", exc_info=e)
1898
2549
use_dbus = False
1899
2550
server_settings["use_dbus"] = False
1900
2551
tcp_server.use_dbus = False
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"])))
2552
if zeroconf:
2553
protocol = avahi.PROTO_INET6 if use_ipv6 else avahi.PROTO_INET
2554
service = AvahiServiceToSyslog(name =
2555
server_settings["servicename"],
2556
servicetype = "_mandos._tcp",
2557
protocol = protocol, bus = bus)
2558
if server_settings["interface"]:
2559
service.interface = (if_nametoindex
2560
(server_settings["interface"]
2561
.encode("utf-8")))
1908
2562
1909
2563
global multiprocessing_manager
1910
2564
multiprocessing_manager = multiprocessing.Manager()
1912
2566
client_class = Client
1913
2567
if use_dbus:
1914
2568
client_class = functools.partial(ClientDBus, bus = bus)
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):
2569
2570
client_settings = Client.config_parser(client_config)
2571
old_client_settings = {}
2572
clients_data = {}
2573
2574
# This is used to redirect stdout and stderr for checker processes
2575
global wnull
2576
wnull = open(os.devnull, "w") # A writable /dev/null
2577
# Only used if server is running in foreground but not in debug
2578
# mode
2579
if debug or not foreground:
2580
wnull.close()
2581
2582
# Get client data and settings from last running state.
2583
if server_settings["restore"]:
2584
try:
2585
with open(stored_state_path, "rb") as stored_state:
2586
clients_data, old_client_settings = (pickle.load
2587
(stored_state))
2588
os.remove(stored_state_path)
2589
except IOError as e:
2590
if e.errno == errno.ENOENT:
2591
logger.warning("Could not load persistent state: {}"
2592
.format(os.strerror(e.errno)))
2593
else:
2594
logger.critical("Could not load persistent state:",
2595
exc_info=e)
2596
raise
2597
except EOFError as e:
2598
logger.warning("Could not load persistent state: "
2599
"EOFError:", exc_info=e)
2600
2601
with PGPEngine() as pgp:
2602
for client_name, client in clients_data.items():
2603
# Skip removed clients
2604
if client_name not in client_settings:
2605
continue
2606
2607
# Decide which value to use after restoring saved state.
2608
# We have three different values: Old config file,
2609
# new config file, and saved state.
2610
# New config value takes precedence if it differs from old
2611
# config value, otherwise use saved state.
2612
for name, value in client_settings[client_name].items():
2613
try:
2614
# For each value in new config, check if it
2615
# differs from the old config value (Except for
2616
# the "secret" attribute)
2617
if (name != "secret" and
2618
value != old_client_settings[client_name]
2619
[name]):
2620
client[name] = value
2621
except KeyError:
2622
pass
2623
2624
# Clients who has passed its expire date can still be
2625
# enabled if its last checker was successful. Clients
2626
# whose checker succeeded before we stored its state is
2627
# assumed to have successfully run all checkers during
2628
# downtime.
2629
if client["enabled"]:
2630
if datetime.datetime.utcnow() >= client["expires"]:
2631
if not client["last_checked_ok"]:
2632
logger.warning(
2633
"disabling client {} - Client never "
2634
"performed a successful checker"
2635
.format(client_name))
2636
client["enabled"] = False
2637
elif client["last_checker_status"] != 0:
2638
logger.warning(
2639
"disabling client {} - Client last"
2640
" checker failed with error code {}"
2641
.format(client_name,
2642
client["last_checker_status"]))
2643
client["enabled"] = False
2644
else:
2645
client["expires"] = (datetime.datetime
2646
.utcnow()
2647
+ client["timeout"])
2648
logger.debug("Last checker succeeded,"
2649
" keeping {} enabled"
2650
.format(client_name))
1922
2651
try:
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()))
2652
client["secret"] = (
2653
pgp.decrypt(client["encrypted_secret"],
2654
client_settings[client_name]
2655
["secret"]))
2656
except PGPError:
2657
# If decryption fails, we use secret from new settings
2658
logger.debug("Failed to decrypt {} old secret"
2659
.format(client_name))
2660
client["secret"] = (
2661
client_settings[client_name]["secret"])
2662
2663
# Add/remove clients based on new changes made to config
2664
for client_name in (set(old_client_settings)
2665
- set(client_settings)):
2666
del clients_data[client_name]
2667
for client_name in (set(client_settings)
2668
- set(old_client_settings)):
2669
clients_data[client_name] = client_settings[client_name]
2670
2671
# Create all client objects
2672
for client_name, client in clients_data.items():
2673
tcp_server.clients[client_name] = client_class(
2674
name = client_name, settings = client,
2675
server_settings = server_settings)
2676
1932
2677
if not tcp_server.clients:
1933
2678
logger.warning("No clients defined")
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
2679
2680
if not foreground:
2681
if pidfile is not None:
2682
try:
2683
with pidfile:
2684
pid = os.getpid()
2685
pidfile.write("{}\n".format(pid).encode("utf-8"))
2686
except IOError:
2687
logger.error("Could not write to file %r with PID %d",
2688
pidfilename, pid)
2689
del pidfile
1947
2690
del pidfilename
1948
1949
signal.signal(signal.SIGINT, signal.SIG_IGN)
1950
2691
1951
2692
signal.signal(signal.SIGHUP, lambda signum, frame: sys.exit())
1952
2693
signal.signal(signal.SIGTERM, lambda signum, frame: sys.exit())
1953
2694
1954
2695
if use_dbus:
1955
class MandosDBusService(dbus.service.Object):
2696
@alternate_dbus_interfaces({"se.recompile.Mandos":
2697
"se.bsnet.fukt.Mandos"})
2698
class MandosDBusService(DBusObjectWithProperties):
1956
2699
"""A D-Bus proxy object"""
1957
2700
def __init__(self):
1958
2701
dbus.service.Object.__init__(self, bus, "/")
1959
_interface = "se.bsnet.fukt.Mandos"
2702
_interface = "se.recompile.Mandos"
2703
2704
@dbus_interface_annotations(_interface)
2705
def _foo(self):
2706
return { "org.freedesktop.DBus.Property"
2707
".EmitsChangedSignal":
2708
"false"}
1960
2709
1961
2710
@dbus.service.signal(_interface, signature="o")
1962
2711
def ClientAdded(self, objpath):
1977
2726
def GetAllClients(self):
1978
2727
"D-Bus method"
1979
2728
return dbus.Array(c.dbus_object_path
1980
for c in tcp_server.clients)
2729
for c in
2730
tcp_server.clients.itervalues())
1981
2731
1982
2732
@dbus.service.method(_interface,
1983
2733
out_signature="a{oa{sv}}")
1984
2734
def GetAllClientsWithProperties(self):
1985
2735
"D-Bus method"
1986
2736
return dbus.Dictionary(
1987
((c.dbus_object_path, c.GetAll(""))
1988
for c in tcp_server.clients),
2737
{ c.dbus_object_path: c.GetAll("")
2738
for c in tcp_server.clients.itervalues() },
1989
2739
signature="oa{sv}")
1990
2740
1991
2741
@dbus.service.method(_interface, in_signature="o")
1992
2742
def RemoveClient(self, object_path):
1993
2743
"D-Bus method"
1994
for c in tcp_server.clients:
2744
for c in tcp_server.clients.itervalues():
1995
2745
if c.dbus_object_path == object_path:
1996
tcp_server.clients.remove(c)
2746
del tcp_server.clients[c.name]
1997
2747
c.remove_from_connection()
1998
2748
# Don't signal anything except ClientRemoved
1999
2749
c.disable(quiet=True)
2008
2758
2009
2759
def cleanup():
2010
2760
"Cleanup function; run on exit"
2011
service.cleanup()
2012
2761
if zeroconf:
2762
service.cleanup()
2763
2764
multiprocessing.active_children()
2765
wnull.close()
2766
if not (tcp_server.clients or client_settings):
2767
return
2768
2769
# Store client before exiting. Secrets are encrypted with key
2770
# based on what config file has. If config file is
2771
# removed/edited, old secret will thus be unrecovable.
2772
clients = {}
2773
with PGPEngine() as pgp:
2774
for client in tcp_server.clients.itervalues():
2775
key = client_settings[client.name]["secret"]
2776
client.encrypted_secret = pgp.encrypt(client.secret,
2777
key)
2778
client_dict = {}
2779
2780
# A list of attributes that can not be pickled
2781
# + secret.
2782
exclude = { "bus", "changedstate", "secret",
2783
"checker", "server_settings" }
2784
for name, typ in (inspect.getmembers
2785
(dbus.service.Object)):
2786
exclude.add(name)
2787
2788
client_dict["encrypted_secret"] = (client
2789
.encrypted_secret)
2790
for attr in client.client_structure:
2791
if attr not in exclude:
2792
client_dict[attr] = getattr(client, attr)
2793
2794
clients[client.name] = client_dict
2795
del client_settings[client.name]["secret"]
2796
2797
try:
2798
with (tempfile.NamedTemporaryFile
2799
(mode='wb', suffix=".pickle", prefix='clients-',
2800
dir=os.path.dirname(stored_state_path),
2801
delete=False)) as stored_state:
2802
pickle.dump((clients, client_settings), stored_state)
2803
tempname=stored_state.name
2804
os.rename(tempname, stored_state_path)
2805
except (IOError, OSError) as e:
2806
if not debug:
2807
try:
2808
os.remove(tempname)
2809
except NameError:
2810
pass
2811
if e.errno in (errno.ENOENT, errno.EACCES, errno.EEXIST):
2812
logger.warning("Could not save persistent state: {}"
2813
.format(os.strerror(e.errno)))
2814
else:
2815
logger.warning("Could not save persistent state:",
2816
exc_info=e)
2817
raise
2818
2819
# Delete all clients, and settings from config
2013
2820
while tcp_server.clients:
2014
client = tcp_server.clients.pop()
2821
name, client = tcp_server.clients.popitem()
2015
2822
if use_dbus:
2016
2823
client.remove_from_connection()
2017
client.disable_hook = None
2018
2824
# Don't signal anything except ClientRemoved
2019
2825
client.disable(quiet=True)
2020
2826
if use_dbus:
2021
2827
# Emit D-Bus signal
2022
mandos_dbus_service.ClientRemoved(client.dbus_object_path,
2828
mandos_dbus_service.ClientRemoved(client
2829
.dbus_object_path,
2023
2830
client.name)
2831
client_settings.clear()
2024
2832
2025
2833
atexit.register(cleanup)
2026
2834
2027
for client in tcp_server.clients:
2835
for client in tcp_server.clients.itervalues():
2028
2836
if use_dbus:
2029
2837
# Emit D-Bus signal
2030
2838
mandos_dbus_service.ClientAdded(client.dbus_object_path)
2031
client.enable()
2839
# Need to initiate checking of clients
2840
if client.enabled:
2841
client.init_checker()
2032
2842
2033
2843
tcp_server.enable()
2034
2844
tcp_server.server_activate()
2035
2845
2036
2846
# Find out what port we got
2037
service.port = tcp_server.socket.getsockname()[1]
2847
if zeroconf:
2848
service.port = tcp_server.socket.getsockname()[1]
2038
2849
if use_ipv6:
2039
2850
logger.info("Now listening on address %r, port %d,"
2040
" flowinfo %d, scope_id %d"
2041
% tcp_server.socket.getsockname())
2851
" flowinfo %d, scope_id %d",
2852
*tcp_server.socket.getsockname())
2042
2853
else: # IPv4
2043
logger.info("Now listening on address %r, port %d"
2044
% tcp_server.socket.getsockname())
2854
logger.info("Now listening on address %r, port %d",
2855
*tcp_server.socket.getsockname())
2045
2856
2046
2857
#service.interface = tcp_server.socket.getsockname()[3]
2047
2858
2048
2859
try:
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
2860
if zeroconf:
2861
# From the Avahi example code
2862
try:
2863
service.activate()
2864
except dbus.exceptions.DBusException as error:
2865
logger.critical("D-Bus Exception", exc_info=error)
2866
cleanup()
2867
sys.exit(1)
2868
# End of Avahi example code
2057
2869
2058
2870
gobject.io_add_watch(tcp_server.fileno(), gobject.IO_IN,
2059
2871
lambda *args, **kwargs:
2063
2875
logger.debug("Starting main loop")
2064
2876
main_loop.run()
2065
2877
except AvahiError as error:
2066
logger.critical("AvahiError: %s", error)
2878
logger.critical("Avahi Error", exc_info=error)
2067
2879
cleanup()
2068
2880
sys.exit(1)
2069
2881
except KeyboardInterrupt:
Loggerhead is a web-based interface for Breezy
Version: 2.0.2.dev0