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- Committer: Teddy Hogeborn
- Date: 2008-08-12 19:22:34 UTC
- Revision ID: teddy@fukt.bsnet.se-20080812192234-8bm17713ltih9ud1
* initramfs-tools-hook: New.
* initramfs-tools-hook-conf: New.
* initramfs-tools-hook-conf: New.
- files added:
- network-protocol.txt
- files removed:
- .bzr-builddeb
- debian
- debian/po
- files renamed:
- plugin-runner.c => mandos-client.c
- plugin-runner.xml => mandos-client.xml
- plugins.d/mandos-client.c => plugins.d/password-request.c
- plugins.d/mandos-client.xml => plugins.d/password-request.xml
- files modified:
- Makefile
added
removed
mandos
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# and some lines in "main".
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#
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# Everything else is
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# Copyright © 2008,2009 Teddy Hogeborn
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# Copyright © 2008,2009 Björn Påhlsson
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# Copyright © 2007-2008 Teddy Hogeborn & 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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# GNU General Public License for more details.
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#
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# You should have received a copy of the GNU General Public License
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# along with this program. If not, see
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# <http://www.gnu.org/licenses/>.
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# along with this program. If not, see <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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#
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from __future__ import division, with_statement, absolute_import
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from __future__ import division
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import SocketServer
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import socket
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import optparse
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import select
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from optparse import OptionParser
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import datetime
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import errno
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import gnutls.crypto
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import stat
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import logging
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import logging.handlers
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import pwd
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from contextlib import closing
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import dbus
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import dbus.service
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import gobject
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import avahi
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from dbus.mainloop.glib import DBusGMainLoop
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import ctypes
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import ctypes.util
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63
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version = "1.0.5"
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version = "1.0"
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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 = "/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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syslogger = logging.handlers.SysLogHandler\
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(facility = logging.handlers.SysLogHandler.LOG_DAEMON,
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address = "/dev/log")
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syslogger.setFormatter(logging.Formatter\
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('Mandos: %(levelname)s: %(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: %(message)s'))
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console.setFormatter(logging.Formatter('%(name)s: %(levelname)s:'
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' %(message)s'))
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logger.addHandler(console)
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class AvahiError(Exception):
86
def __init__(self, value, *args, **kwargs):
80
def __init__(self, value):
87
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self.value = value
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super(AvahiError, self).__init__(value, *args, **kwargs)
89
def __unicode__(self):
90
return unicode(repr(self.value))
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def __str__(self):
83
return repr(self.value)
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class AvahiServiceError(AvahiError):
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pass
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a sensible number of times
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"""
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def __init__(self, interface = avahi.IF_UNSPEC, name = None,
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servicetype = None, port = None, TXT = None,
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domain = "", host = "", max_renames = 32768):
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type = None, port = None, TXT = None, domain = "",
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host = "", max_renames = 32768):
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self.interface = interface
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self.name = name
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self.type = servicetype
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self.type = type
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self.port = port
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self.TXT = TXT if TXT is not None else []
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if TXT is None:
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self.TXT = []
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else:
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self.TXT = TXT
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self.domain = domain
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self.host = host
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self.rename_count = 0
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self.max_renames = max_renames
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def rename(self):
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"""Derived from the Avahi example code"""
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if self.rename_count >= self.max_renames:
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logger.critical(u"No suitable Zeroconf service name found"
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u" after %i retries, exiting.",
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self.rename_count)
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raise AvahiServiceError(u"Too many renames")
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self.name = server.GetAlternativeServiceName(self.name)
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logger.info(u"Changing Zeroconf service name to %r ...",
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str(self.name))
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syslogger.setFormatter(logging.Formatter
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logger.critical(u"No suitable service name found after %i"
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u" retries, exiting.", rename_count)
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raise AvahiServiceError("Too many renames")
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name = server.GetAlternativeServiceName(name)
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logger.error(u"Changing name to %r ...", name)
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syslogger.setFormatter(logging.Formatter\
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('Mandos (%s): %%(levelname)s:'
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' %%(message)s' % self.name))
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' %%(message)s' % name))
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self.remove()
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self.add()
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self.rename_count += 1
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"""Derived from the Avahi example code"""
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global group
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if group is None:
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group = dbus.Interface(bus.get_object
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(avahi.DBUS_NAME,
144
group = dbus.Interface\
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(bus.get_object(avahi.DBUS_NAME,
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server.EntryGroupNew()),
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avahi.DBUS_INTERFACE_ENTRY_GROUP)
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avahi.DBUS_INTERFACE_ENTRY_GROUP)
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group.connect_to_signal('StateChanged',
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entry_group_state_changed)
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logger.debug(u"Adding Zeroconf service '%s' of type '%s' ...",
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logger.debug(u"Adding service '%s' of type '%s' ...",
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service.name, service.type)
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group.AddService(
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self.interface, # interface
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# End of Avahi example code
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def _datetime_to_dbus(dt, variant_level=0):
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"""Convert a UTC datetime.datetime() to a D-Bus type."""
176
return dbus.String(dt.isoformat(), variant_level=variant_level)
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class Client(dbus.service.Object):
167
class Client(object):
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"""A representation of a client host served by this server.
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Attributes:
182
name: string; from the config file, used in log messages and
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D-Bus identifiers
170
name: string; from the config file, used in log messages
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fingerprint: string (40 or 32 hexadecimal digits); used to
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uniquely identify the client
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secret: bytestring; sent verbatim (over TLS) to client
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host: string; available for use by the checker command
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created: datetime.datetime(); (UTC) object creation
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last_enabled: datetime.datetime(); (UTC)
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enabled: bool()
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last_checked_ok: datetime.datetime(); (UTC) or None
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timeout: datetime.timedelta(); How long from last_checked_ok
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until this client is invalid
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interval: datetime.timedelta(); How often to start a new checker
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disable_hook: If set, called by disable() as disable_hook(self)
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checker: subprocess.Popen(); a running checker process used
197
to see if the client lives.
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'None' if no process is running.
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secret: bytestring; sent verbatim (over TLS) to client
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host: string; available for use by the checker command
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created: datetime.datetime(); object creation, not client host
176
last_checked_ok: datetime.datetime() or None if not yet checked OK
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timeout: datetime.timedelta(); How long from last_checked_ok
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until this client is invalid
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interval: datetime.timedelta(); How often to start a new checker
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stop_hook: If set, called by stop() as stop_hook(self)
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checker: subprocess.Popen(); a running checker process used
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to see if the client lives.
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'None' if no process is running.
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checker_initiator_tag: a gobject event source tag, or None
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disable_initiator_tag: - '' -
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stop_initiator_tag: - '' -
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checker_callback_tag: - '' -
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checker_command: string; External command which is run to check if
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client lives. %() expansions are done at
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runtime with vars(self) as dict, so that for
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instance %(name)s can be used in the command.
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use_dbus: bool(); Whether to provide D-Bus interface and signals
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dbus_object_path: dbus.ObjectPath ; only set if self.use_dbus
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Private attibutes:
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_timeout: Real variable for 'timeout'
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_interval: Real variable for 'interval'
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_timeout_milliseconds: Used when calling gobject.timeout_add()
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_interval_milliseconds: - '' -
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"""
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def timeout_milliseconds(self):
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"Return the 'timeout' attribute in milliseconds"
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return ((self.timeout.days * 24 * 60 * 60 * 1000)
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+ (self.timeout.seconds * 1000)
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+ (self.timeout.microseconds // 1000))
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def interval_milliseconds(self):
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"Return the 'interval' attribute in milliseconds"
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return ((self.interval.days * 24 * 60 * 60 * 1000)
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+ (self.interval.seconds * 1000)
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+ (self.interval.microseconds // 1000))
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def __init__(self, name = None, disable_hook=None, config=None,
222
use_dbus=True):
197
def _set_timeout(self, timeout):
198
"Setter function for 'timeout' attribute"
199
self._timeout = timeout
200
self._timeout_milliseconds = ((self.timeout.days
201
* 24 * 60 * 60 * 1000)
202
+ (self.timeout.seconds * 1000)
203
+ (self.timeout.microseconds
204
// 1000))
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timeout = property(lambda self: self._timeout,
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_set_timeout)
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del _set_timeout
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def _set_interval(self, interval):
209
"Setter function for 'interval' attribute"
210
self._interval = interval
211
self._interval_milliseconds = ((self.interval.days
212
* 24 * 60 * 60 * 1000)
213
+ (self.interval.seconds
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* 1000)
215
+ (self.interval.microseconds
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// 1000))
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interval = property(lambda self: self._interval,
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_set_interval)
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del _set_interval
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def __init__(self, name = None, stop_hook=None, config={}):
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"""Note: the 'checker' key in 'config' sets the
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'checker_command' attribute and *not* the 'checker'
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attribute."""
226
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self.name = name
227
if config is None:
228
config = {}
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logger.debug(u"Creating client %r", self.name)
230
self.use_dbus = False # During __init__
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# Uppercase and remove spaces from fingerprint for later
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# comparison purposes with return value from the fingerprint()
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# function
234
self.fingerprint = (config["fingerprint"].upper()
235
.replace(u" ", u""))
229
self.fingerprint = config["fingerprint"].upper()\
230
.replace(u" ", u"")
236
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logger.debug(u" Fingerprint: %s", self.fingerprint)
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if "secret" in config:
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self.secret = config["secret"].decode(u"base64")
239
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elif "secfile" in config:
240
with closing(open(os.path.expanduser
241
(os.path.expandvars
242
(config["secfile"])))) as secfile:
243
self.secret = secfile.read()
235
sf = open(config["secfile"])
236
self.secret = sf.read()
237
sf.close()
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else:
245
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raise TypeError(u"No secret or secfile for client %s"
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% self.name)
247
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self.host = config.get("host", "")
248
self.created = datetime.datetime.utcnow()
249
self.enabled = False
250
self.last_enabled = None
242
self.created = datetime.datetime.now()
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self.last_checked_ok = None
252
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self.timeout = string_to_delta(config["timeout"])
253
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self.interval = string_to_delta(config["interval"])
254
self.disable_hook = disable_hook
246
self.stop_hook = stop_hook
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self.checker = None
256
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self.checker_initiator_tag = None
257
self.disable_initiator_tag = None
249
self.stop_initiator_tag = None
258
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self.checker_callback_tag = None
259
self.checker_command = config["checker"]
260
self.last_connect = None
261
# Only now, when this client is initialized, can it show up on
262
# the D-Bus
263
self.use_dbus = use_dbus
264
if self.use_dbus:
265
self.dbus_object_path = (dbus.ObjectPath
266
("/clients/"
267
+ self.name.replace(".", "_")))
268
dbus.service.Object.__init__(self, bus,
269
self.dbus_object_path)
270
271
def enable(self):
251
self.check_command = config["checker"]
252
def start(self):
272
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"""Start this client's checker and timeout hooks"""
273
self.last_enabled = datetime.datetime.utcnow()
274
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# Schedule a new checker to be started an 'interval' from now,
275
255
# and every interval from then on.
276
self.checker_initiator_tag = (gobject.timeout_add
277
(self.interval_milliseconds(),
278
self.start_checker))
256
self.checker_initiator_tag = gobject.timeout_add\
257
(self._interval_milliseconds,
258
self.start_checker)
279
259
# Also start a new checker *right now*.
280
260
self.start_checker()
281
# Schedule a disable() when 'timeout' has passed
282
self.disable_initiator_tag = (gobject.timeout_add
283
(self.timeout_milliseconds(),
284
self.disable))
285
self.enabled = True
286
if self.use_dbus:
287
# Emit D-Bus signals
288
self.PropertyChanged(dbus.String(u"enabled"),
289
dbus.Boolean(True, variant_level=1))
290
self.PropertyChanged(dbus.String(u"last_enabled"),
291
(_datetime_to_dbus(self.last_enabled,
292
variant_level=1)))
293
294
def disable(self):
295
"""Disable this client."""
296
if not getattr(self, "enabled", False):
261
# Schedule a stop() when 'timeout' has passed
262
self.stop_initiator_tag = gobject.timeout_add\
263
(self._timeout_milliseconds,
264
self.stop)
265
def stop(self):
266
"""Stop this client.
267
The possibility that a client might be restarted is left open,
268
but not currently used."""
269
# If this client doesn't have a secret, it is already stopped.
270
if hasattr(self, "secret") and self.secret:
271
logger.info(u"Stopping client %s", self.name)
272
self.secret = None
273
else:
297
274
return False
298
logger.info(u"Disabling client %s", self.name)
299
if getattr(self, "disable_initiator_tag", False):
300
gobject.source_remove(self.disable_initiator_tag)
301
self.disable_initiator_tag = None
275
if getattr(self, "stop_initiator_tag", False):
276
gobject.source_remove(self.stop_initiator_tag)
277
self.stop_initiator_tag = None
302
278
if getattr(self, "checker_initiator_tag", False):
303
279
gobject.source_remove(self.checker_initiator_tag)
304
280
self.checker_initiator_tag = None
305
281
self.stop_checker()
306
if self.disable_hook:
307
self.disable_hook(self)
308
self.enabled = False
309
if self.use_dbus:
310
# Emit D-Bus signal
311
self.PropertyChanged(dbus.String(u"enabled"),
312
dbus.Boolean(False, variant_level=1))
282
if self.stop_hook:
283
self.stop_hook(self)
313
284
# Do not run this again if called by a gobject.timeout_add
314
285
return False
315
316
286
def __del__(self):
317
self.disable_hook = None
318
self.disable()
319
320
def checker_callback(self, pid, condition, command):
287
self.stop_hook = None
288
self.stop()
289
def checker_callback(self, pid, condition):
321
290
"""The checker has completed, so take appropriate actions."""
291
now = datetime.datetime.now()
322
292
self.checker_callback_tag = None
323
293
self.checker = None
324
if self.use_dbus:
325
# Emit D-Bus signal
326
self.PropertyChanged(dbus.String(u"checker_running"),
327
dbus.Boolean(False, variant_level=1))
328
if os.WIFEXITED(condition):
329
exitstatus = os.WEXITSTATUS(condition)
330
if exitstatus == 0:
331
logger.info(u"Checker for %(name)s succeeded",
332
vars(self))
333
self.checked_ok()
334
else:
335
logger.info(u"Checker for %(name)s failed",
336
vars(self))
337
if self.use_dbus:
338
# Emit D-Bus signal
339
self.CheckerCompleted(dbus.Int16(exitstatus),
340
dbus.Int64(condition),
341
dbus.String(command))
342
else:
294
if os.WIFEXITED(condition) \
295
and (os.WEXITSTATUS(condition) == 0):
296
logger.info(u"Checker for %(name)s succeeded",
297
vars(self))
298
self.last_checked_ok = now
299
gobject.source_remove(self.stop_initiator_tag)
300
self.stop_initiator_tag = gobject.timeout_add\
301
(self._timeout_milliseconds,
302
self.stop)
303
elif not os.WIFEXITED(condition):
343
304
logger.warning(u"Checker for %(name)s crashed?",
344
305
vars(self))
345
if self.use_dbus:
346
# Emit D-Bus signal
347
self.CheckerCompleted(dbus.Int16(-1),
348
dbus.Int64(condition),
349
dbus.String(command))
350
351
def checked_ok(self):
352
"""Bump up the timeout for this client.
353
This should only be called when the client has been seen,
354
alive and well.
355
"""
356
self.last_checked_ok = datetime.datetime.utcnow()
357
gobject.source_remove(self.disable_initiator_tag)
358
self.disable_initiator_tag = (gobject.timeout_add
359
(self.timeout_milliseconds(),
360
self.disable))
361
if self.use_dbus:
362
# Emit D-Bus signal
363
self.PropertyChanged(
364
dbus.String(u"last_checked_ok"),
365
(_datetime_to_dbus(self.last_checked_ok,
366
variant_level=1)))
367
306
else:
307
logger.info(u"Checker for %(name)s failed",
308
vars(self))
368
309
def start_checker(self):
369
310
"""Start a new checker subprocess if one is not running.
370
311
If a checker already exists, leave it running and do
379
320
# is as it should be.
380
321
if self.checker is None:
381
322
try:
382
# In case checker_command has exactly one % operator
383
command = self.checker_command % self.host
323
# In case check_command has exactly one % operator
324
command = self.check_command % self.host
384
325
except TypeError:
385
326
# Escape attributes for the shell
386
327
escaped_attrs = dict((key, re.escape(str(val)))
387
328
for key, val in
388
329
vars(self).iteritems())
389
330
try:
390
command = self.checker_command % escaped_attrs
331
command = self.check_command % escaped_attrs
391
332
except TypeError, error:
392
333
logger.error(u'Could not format string "%s":'
393
u' %s', self.checker_command, error)
334
u' %s', self.check_command, error)
394
335
return True # Try again later
395
336
try:
396
337
logger.info(u"Starting checker %r for %s",
397
338
command, self.name)
398
# We don't need to redirect stdout and stderr, since
399
# in normal mode, that is already done by daemon(),
400
# and in debug mode we don't want to. (Stdin is
401
# always replaced by /dev/null.)
402
339
self.checker = subprocess.Popen(command,
403
340
close_fds=True,
404
341
shell=True, cwd="/")
405
if self.use_dbus:
406
# Emit D-Bus signal
407
self.CheckerStarted(command)
408
self.PropertyChanged(
409
dbus.String("checker_running"),
410
dbus.Boolean(True, variant_level=1))
411
self.checker_callback_tag = (gobject.child_watch_add
412
(self.checker.pid,
413
self.checker_callback,
414
data=command))
415
# The checker may have completed before the gobject
416
# watch was added. Check for this.
417
pid, status = os.waitpid(self.checker.pid, os.WNOHANG)
418
if pid:
419
gobject.source_remove(self.checker_callback_tag)
420
self.checker_callback(pid, status, command)
421
except OSError, error:
342
self.checker_callback_tag = gobject.child_watch_add\
343
(self.checker.pid,
344
self.checker_callback)
345
except subprocess.OSError, error:
422
346
logger.error(u"Failed to start subprocess: %s",
423
347
error)
424
348
# Re-run this periodically if run by gobject.timeout_add
425
349
return True
426
427
350
def stop_checker(self):
428
351
"""Force the checker process, if any, to stop."""
429
352
if self.checker_callback_tag:
441
364
if error.errno != errno.ESRCH: # No such process
442
365
raise
443
366
self.checker = None
444
if self.use_dbus:
445
self.PropertyChanged(dbus.String(u"checker_running"),
446
dbus.Boolean(False, variant_level=1))
447
448
367
def still_valid(self):
449
368
"""Has the timeout not yet passed for this client?"""
450
if not getattr(self, "enabled", False):
451
return False
452
now = datetime.datetime.utcnow()
369
now = datetime.datetime.now()
453
370
if self.last_checked_ok is None:
454
371
return now < (self.created + self.timeout)
455
372
else:
456
373
return now < (self.last_checked_ok + self.timeout)
457
458
## D-Bus methods & signals
459
_interface = u"se.bsnet.fukt.Mandos.Client"
460
461
# CheckedOK - method
462
CheckedOK = dbus.service.method(_interface)(checked_ok)
463
CheckedOK.__name__ = "CheckedOK"
464
465
# CheckerCompleted - signal
466
@dbus.service.signal(_interface, signature="nxs")
467
def CheckerCompleted(self, exitcode, waitstatus, command):
468
"D-Bus signal"
469
pass
470
471
# CheckerStarted - signal
472
@dbus.service.signal(_interface, signature="s")
473
def CheckerStarted(self, command):
474
"D-Bus signal"
475
pass
476
477
# GetAllProperties - method
478
@dbus.service.method(_interface, out_signature="a{sv}")
479
def GetAllProperties(self):
480
"D-Bus method"
481
return dbus.Dictionary({
482
dbus.String("name"):
483
dbus.String(self.name, variant_level=1),
484
dbus.String("fingerprint"):
485
dbus.String(self.fingerprint, variant_level=1),
486
dbus.String("host"):
487
dbus.String(self.host, variant_level=1),
488
dbus.String("created"):
489
_datetime_to_dbus(self.created, variant_level=1),
490
dbus.String("last_enabled"):
491
(_datetime_to_dbus(self.last_enabled,
492
variant_level=1)
493
if self.last_enabled is not None
494
else dbus.Boolean(False, variant_level=1)),
495
dbus.String("enabled"):
496
dbus.Boolean(self.enabled, variant_level=1),
497
dbus.String("last_checked_ok"):
498
(_datetime_to_dbus(self.last_checked_ok,
499
variant_level=1)
500
if self.last_checked_ok is not None
501
else dbus.Boolean (False, variant_level=1)),
502
dbus.String("timeout"):
503
dbus.UInt64(self.timeout_milliseconds(),
504
variant_level=1),
505
dbus.String("interval"):
506
dbus.UInt64(self.interval_milliseconds(),
507
variant_level=1),
508
dbus.String("checker"):
509
dbus.String(self.checker_command,
510
variant_level=1),
511
dbus.String("checker_running"):
512
dbus.Boolean(self.checker is not None,
513
variant_level=1),
514
dbus.String("object_path"):
515
dbus.ObjectPath(self.dbus_object_path,
516
variant_level=1)
517
}, signature="sv")
518
519
# IsStillValid - method
520
IsStillValid = (dbus.service.method(_interface, out_signature="b")
521
(still_valid))
522
IsStillValid.__name__ = "IsStillValid"
523
524
# PropertyChanged - signal
525
@dbus.service.signal(_interface, signature="sv")
526
def PropertyChanged(self, property, value):
527
"D-Bus signal"
528
pass
529
530
# SetChecker - method
531
@dbus.service.method(_interface, in_signature="s")
532
def SetChecker(self, checker):
533
"D-Bus setter method"
534
self.checker_command = checker
535
# Emit D-Bus signal
536
self.PropertyChanged(dbus.String(u"checker"),
537
dbus.String(self.checker_command,
538
variant_level=1))
539
540
# SetHost - method
541
@dbus.service.method(_interface, in_signature="s")
542
def SetHost(self, host):
543
"D-Bus setter method"
544
self.host = host
545
# Emit D-Bus signal
546
self.PropertyChanged(dbus.String(u"host"),
547
dbus.String(self.host, variant_level=1))
548
549
# SetInterval - method
550
@dbus.service.method(_interface, in_signature="t")
551
def SetInterval(self, milliseconds):
552
self.interval = datetime.timedelta(0, 0, 0, milliseconds)
553
# Emit D-Bus signal
554
self.PropertyChanged(dbus.String(u"interval"),
555
(dbus.UInt64(self.interval_milliseconds(),
556
variant_level=1)))
557
558
# SetSecret - method
559
@dbus.service.method(_interface, in_signature="ay",
560
byte_arrays=True)
561
def SetSecret(self, secret):
562
"D-Bus setter method"
563
self.secret = str(secret)
564
565
# SetTimeout - method
566
@dbus.service.method(_interface, in_signature="t")
567
def SetTimeout(self, milliseconds):
568
self.timeout = datetime.timedelta(0, 0, 0, milliseconds)
569
# Emit D-Bus signal
570
self.PropertyChanged(dbus.String(u"timeout"),
571
(dbus.UInt64(self.timeout_milliseconds(),
572
variant_level=1)))
573
574
# Enable - method
575
Enable = dbus.service.method(_interface)(enable)
576
Enable.__name__ = "Enable"
577
578
# StartChecker - method
579
@dbus.service.method(_interface)
580
def StartChecker(self):
581
"D-Bus method"
582
self.start_checker()
583
584
# Disable - method
585
@dbus.service.method(_interface)
586
def Disable(self):
587
"D-Bus method"
588
self.disable()
589
590
# StopChecker - method
591
StopChecker = dbus.service.method(_interface)(stop_checker)
592
StopChecker.__name__ = "StopChecker"
593
594
del _interface
595
374
596
375
597
376
def peer_certificate(session):
598
377
"Return the peer's OpenPGP certificate as a bytestring"
599
378
# If not an OpenPGP certificate...
600
if (gnutls.library.functions
601
.gnutls_certificate_type_get(session._c_object)
602
!= gnutls.library.constants.GNUTLS_CRT_OPENPGP):
379
if gnutls.library.functions.gnutls_certificate_type_get\
380
(session._c_object) \
381
!= gnutls.library.constants.GNUTLS_CRT_OPENPGP:
603
382
# ...do the normal thing
604
383
return session.peer_certificate
605
list_size = ctypes.c_uint(1)
606
cert_list = (gnutls.library.functions
607
.gnutls_certificate_get_peers
608
(session._c_object, ctypes.byref(list_size)))
609
if not bool(cert_list) and list_size.value != 0:
610
raise gnutls.errors.GNUTLSError("error getting peer"
611
" certificate")
384
list_size = ctypes.c_uint()
385
cert_list = gnutls.library.functions.gnutls_certificate_get_peers\
386
(session._c_object, ctypes.byref(list_size))
612
387
if list_size.value == 0:
613
388
return None
614
389
cert = cert_list[0]
618
393
def fingerprint(openpgp):
619
394
"Convert an OpenPGP bytestring to a hexdigit fingerprint string"
620
395
# New GnuTLS "datum" with the OpenPGP public key
621
datum = (gnutls.library.types
622
.gnutls_datum_t(ctypes.cast(ctypes.c_char_p(openpgp),
623
ctypes.POINTER
624
(ctypes.c_ubyte)),
625
ctypes.c_uint(len(openpgp))))
396
datum = gnutls.library.types.gnutls_datum_t\
397
(ctypes.cast(ctypes.c_char_p(openpgp),
398
ctypes.POINTER(ctypes.c_ubyte)),
399
ctypes.c_uint(len(openpgp)))
626
400
# New empty GnuTLS certificate
627
401
crt = gnutls.library.types.gnutls_openpgp_crt_t()
628
(gnutls.library.functions
629
.gnutls_openpgp_crt_init(ctypes.byref(crt)))
402
gnutls.library.functions.gnutls_openpgp_crt_init\
403
(ctypes.byref(crt))
630
404
# Import the OpenPGP public key into the certificate
631
(gnutls.library.functions
632
.gnutls_openpgp_crt_import(crt, ctypes.byref(datum),
633
gnutls.library.constants
634
.GNUTLS_OPENPGP_FMT_RAW))
635
# Verify the self signature in the key
636
crtverify = ctypes.c_uint()
637
(gnutls.library.functions
638
.gnutls_openpgp_crt_verify_self(crt, 0, ctypes.byref(crtverify)))
639
if crtverify.value != 0:
640
gnutls.library.functions.gnutls_openpgp_crt_deinit(crt)
641
raise gnutls.errors.CertificateSecurityError("Verify failed")
405
gnutls.library.functions.gnutls_openpgp_crt_import\
406
(crt, ctypes.byref(datum),
407
gnutls.library.constants.GNUTLS_OPENPGP_FMT_RAW)
642
408
# New buffer for the fingerprint
643
buf = ctypes.create_string_buffer(20)
644
buf_len = ctypes.c_size_t()
409
buffer = ctypes.create_string_buffer(20)
410
buffer_length = ctypes.c_size_t()
645
411
# Get the fingerprint from the certificate into the buffer
646
(gnutls.library.functions
647
.gnutls_openpgp_crt_get_fingerprint(crt, ctypes.byref(buf),
648
ctypes.byref(buf_len)))
412
gnutls.library.functions.gnutls_openpgp_crt_get_fingerprint\
413
(crt, ctypes.byref(buffer), ctypes.byref(buffer_length))
649
414
# Deinit the certificate
650
415
gnutls.library.functions.gnutls_openpgp_crt_deinit(crt)
651
416
# Convert the buffer to a Python bytestring
652
fpr = ctypes.string_at(buf, buf_len.value)
417
fpr = ctypes.string_at(buffer, buffer_length.value)
653
418
# Convert the bytestring to hexadecimal notation
654
419
hex_fpr = u''.join(u"%02X" % ord(char) for char in fpr)
655
420
return hex_fpr
656
421
657
422
658
class TCP_handler(SocketServer.BaseRequestHandler, object):
423
class tcp_handler(SocketServer.BaseRequestHandler, object):
659
424
"""A TCP request handler class.
660
425
Instantiated by IPv6_TCPServer for each request to handle it.
661
426
Note: This will run in its own forked process."""
662
427
663
428
def handle(self):
664
429
logger.info(u"TCP connection from: %s",
665
unicode(self.client_address))
666
session = (gnutls.connection
667
.ClientSession(self.request,
668
gnutls.connection
669
.X509Credentials()))
430
unicode(self.client_address))
431
session = gnutls.connection.ClientSession\
432
(self.request, gnutls.connection.X509Credentials())
670
433
671
434
line = self.request.makefile().readline()
672
435
logger.debug(u"Protocol version: %r", line)
683
446
# using OpenPGP certificates.
684
447
685
448
#priority = ':'.join(("NONE", "+VERS-TLS1.1", "+AES-256-CBC",
686
# "+SHA1", "+COMP-NULL", "+CTYPE-OPENPGP",
687
# "+DHE-DSS"))
688
# Use a fallback default, since this MUST be set.
689
priority = self.server.settings.get("priority", "NORMAL")
690
(gnutls.library.functions
691
.gnutls_priority_set_direct(session._c_object,
692
priority, None))
449
# "+SHA1", "+COMP-NULL", "+CTYPE-OPENPGP",
450
# "+DHE-DSS"))
451
priority = "NORMAL" # Fallback default, since this
452
# MUST be set.
453
if self.server.settings["priority"]:
454
priority = self.server.settings["priority"]
455
gnutls.library.functions.gnutls_priority_set_direct\
456
(session._c_object, priority, None);
693
457
694
458
try:
695
459
session.handshake()
698
462
# Do not run session.bye() here: the session is not
699
463
# established. Just abandon the request.
700
464
return
701
logger.debug(u"Handshake succeeded")
702
465
try:
703
466
fpr = fingerprint(peer_certificate(session))
704
467
except (TypeError, gnutls.errors.GNUTLSError), error:
706
469
session.bye()
707
470
return
708
471
logger.debug(u"Fingerprint: %s", fpr)
709
472
client = None
710
473
for c in self.server.clients:
711
474
if c.fingerprint == fpr:
712
475
client = c
713
476
break
714
else:
477
if not client:
715
478
logger.warning(u"Client not found for fingerprint: %s",
716
479
fpr)
717
480
session.bye()
724
487
vars(client))
725
488
session.bye()
726
489
return
727
## This won't work here, since we're in a fork.
728
# client.checked_ok()
729
490
sent_size = 0
730
491
while sent_size < len(client.secret):
731
492
sent = session.send(client.secret[sent_size:])
736
497
session.bye()
737
498
738
499
739
class IPv6_TCPServer(SocketServer.ForkingMixIn,
740
SocketServer.TCPServer, object):
500
class IPv6_TCPServer(SocketServer.ForkingTCPServer, object):
741
501
"""IPv6 TCP server. Accepts 'None' as address and/or port.
742
502
Attributes:
743
503
settings: Server settings
744
504
clients: Set() of Client objects
745
enabled: Boolean; whether this server is activated yet
746
505
"""
747
506
address_family = socket.AF_INET6
748
507
def __init__(self, *args, **kwargs):
752
511
if "clients" in kwargs:
753
512
self.clients = kwargs["clients"]
754
513
del kwargs["clients"]
755
self.enabled = False
756
super(IPv6_TCPServer, self).__init__(*args, **kwargs)
514
return super(type(self), self).__init__(*args, **kwargs)
757
515
def server_bind(self):
758
516
"""This overrides the normal server_bind() function
759
517
to bind to an interface if one was specified, and also NOT to
771
529
u" bind to interface %s",
772
530
self.settings["interface"])
773
531
else:
774
raise
532
raise error
775
533
# Only bind(2) the socket if we really need to.
776
534
if self.server_address[0] or self.server_address[1]:
777
535
if not self.server_address[0]:
788
546
# if_nametoindex
789
547
# (self.settings
790
548
# ["interface"]))
791
return super(IPv6_TCPServer, self).server_bind()
792
def server_activate(self):
793
if self.enabled:
794
return super(IPv6_TCPServer, self).server_activate()
795
def enable(self):
796
self.enabled = True
549
return super(type(self), self).server_bind()
797
550
798
551
799
552
def string_to_delta(interval):
800
553
"""Parse a string and return a datetime.timedelta
801
554
802
555
>>> string_to_delta('7d')
803
556
datetime.timedelta(7)
804
557
>>> string_to_delta('60s')
809
562
datetime.timedelta(1)
810
563
>>> string_to_delta(u'1w')
811
564
datetime.timedelta(7)
812
>>> string_to_delta('5m 30s')
813
datetime.timedelta(0, 330)
814
565
"""
815
timevalue = datetime.timedelta(0)
816
for s in interval.split():
817
try:
818
suffix = unicode(s[-1])
819
value = int(s[:-1])
820
if suffix == u"d":
821
delta = datetime.timedelta(value)
822
elif suffix == u"s":
823
delta = datetime.timedelta(0, value)
824
elif suffix == u"m":
825
delta = datetime.timedelta(0, 0, 0, 0, value)
826
elif suffix == u"h":
827
delta = datetime.timedelta(0, 0, 0, 0, 0, value)
828
elif suffix == u"w":
829
delta = datetime.timedelta(0, 0, 0, 0, 0, 0, value)
830
else:
831
raise ValueError
832
except (ValueError, IndexError):
566
try:
567
suffix=unicode(interval[-1])
568
value=int(interval[:-1])
569
if suffix == u"d":
570
delta = datetime.timedelta(value)
571
elif suffix == u"s":
572
delta = datetime.timedelta(0, value)
573
elif suffix == u"m":
574
delta = datetime.timedelta(0, 0, 0, 0, value)
575
elif suffix == u"h":
576
delta = datetime.timedelta(0, 0, 0, 0, 0, value)
577
elif suffix == u"w":
578
delta = datetime.timedelta(0, 0, 0, 0, 0, 0, value)
579
else:
833
580
raise ValueError
834
timevalue += delta
835
return timevalue
581
except (ValueError, IndexError):
582
raise ValueError
583
return delta
836
584
837
585
838
586
def server_state_changed(state):
839
587
"""Derived from the Avahi example code"""
840
588
if state == avahi.SERVER_COLLISION:
841
logger.error(u"Zeroconf server name collision")
589
logger.error(u"Server name collision")
842
590
service.remove()
843
591
elif state == avahi.SERVER_RUNNING:
844
592
service.add()
846
594
847
595
def entry_group_state_changed(state, error):
848
596
"""Derived from the Avahi example code"""
849
logger.debug(u"Avahi state change: %i", state)
597
logger.debug(u"state change: %i", state)
850
598
851
599
if state == avahi.ENTRY_GROUP_ESTABLISHED:
852
logger.debug(u"Zeroconf service established.")
600
logger.debug(u"Service established.")
853
601
elif state == avahi.ENTRY_GROUP_COLLISION:
854
logger.warning(u"Zeroconf service name collision.")
602
logger.warning(u"Service name collision.")
855
603
service.rename()
856
604
elif state == avahi.ENTRY_GROUP_FAILURE:
857
logger.critical(u"Avahi: Error in group state changed %s",
605
logger.critical(u"Error in group state changed %s",
858
606
unicode(error))
859
raise AvahiGroupError(u"State changed: %s" % unicode(error))
607
raise AvahiGroupError("State changed: %s", str(error))
860
608
861
609
def if_nametoindex(interface):
862
610
"""Call the C function if_nametoindex(), or equivalent"""
863
611
global if_nametoindex
864
612
try:
865
if_nametoindex = (ctypes.cdll.LoadLibrary
866
(ctypes.util.find_library("c"))
867
.if_nametoindex)
613
if "ctypes.util" not in sys.modules:
614
import ctypes.util
615
if_nametoindex = ctypes.cdll.LoadLibrary\
616
(ctypes.util.find_library("c")).if_nametoindex
868
617
except (OSError, AttributeError):
869
618
if "struct" not in sys.modules:
870
619
import struct
873
622
def if_nametoindex(interface):
874
623
"Get an interface index the hard way, i.e. using fcntl()"
875
624
SIOCGIFINDEX = 0x8933 # From /usr/include/linux/sockios.h
876
with closing(socket.socket()) as s:
877
ifreq = fcntl.ioctl(s, SIOCGIFINDEX,
878
struct.pack("16s16x", interface))
625
s = socket.socket()
626
ifreq = fcntl.ioctl(s, SIOCGIFINDEX,
627
struct.pack("16s16x", interface))
628
s.close()
879
629
interface_index = struct.unpack("I", ifreq[16:20])[0]
880
630
return interface_index
881
631
return if_nametoindex(interface)
905
655
906
656
907
657
def main():
908
parser = optparse.OptionParser(version = "%%prog %s" % version)
658
global main_loop_started
659
main_loop_started = False
660
661
parser = OptionParser(version = "%%prog %s" % version)
909
662
parser.add_option("-i", "--interface", type="string",
910
663
metavar="IF", help="Bind to interface IF")
911
664
parser.add_option("-a", "--address", type="string",
912
665
help="Address to listen for requests on")
913
666
parser.add_option("-p", "--port", type="int",
914
667
help="Port number to receive requests on")
915
parser.add_option("--check", action="store_true",
668
parser.add_option("--check", action="store_true", default=False,
916
669
help="Run self-test")
917
670
parser.add_option("--debug", action="store_true",
918
671
help="Debug mode; run in foreground and log to"
925
678
default="/etc/mandos", metavar="DIR",
926
679
help="Directory to search for configuration"
927
680
" files")
928
parser.add_option("--no-dbus", action="store_false",
929
dest="use_dbus",
930
help="Do not provide D-Bus system bus"
931
" interface")
932
options = parser.parse_args()[0]
681
(options, args) = parser.parse_args()
933
682
934
683
if options.check:
935
684
import doctest
944
693
"priority":
945
694
"SECURE256:!CTYPE-X.509:+CTYPE-OPENPGP",
946
695
"servicename": "Mandos",
947
"use_dbus": "True",
948
696
}
949
697
950
698
# Parse config file for server-global settings
951
699
server_config = ConfigParser.SafeConfigParser(server_defaults)
952
700
del server_defaults
953
701
server_config.read(os.path.join(options.configdir, "mandos.conf"))
702
server_section = "server"
954
703
# Convert the SafeConfigParser object to a dict
955
server_settings = server_config.defaults()
956
# Use the appropriate methods on the non-string config options
957
server_settings["debug"] = server_config.getboolean("DEFAULT",
958
"debug")
959
server_settings["use_dbus"] = server_config.getboolean("DEFAULT",
960
"use_dbus")
961
if server_settings["port"]:
962
server_settings["port"] = server_config.getint("DEFAULT",
963
"port")
704
server_settings = dict(server_config.items(server_section))
705
# Use getboolean on the boolean config option
706
server_settings["debug"] = server_config.getboolean\
707
(server_section, "debug")
964
708
del server_config
965
709
966
710
# Override the settings from the config file with command line
967
711
# options, if set.
968
712
for option in ("interface", "address", "port", "debug",
969
"priority", "servicename", "configdir",
970
"use_dbus"):
713
"priority", "servicename", "configdir"):
971
714
value = getattr(options, option)
972
715
if value is not None:
973
716
server_settings[option] = value
974
717
del options
975
718
# Now we have our good server settings in "server_settings"
976
719
977
# For convenience
978
720
debug = server_settings["debug"]
979
use_dbus = server_settings["use_dbus"]
980
721
981
722
if not debug:
982
723
syslogger.setLevel(logging.WARNING)
983
724
console.setLevel(logging.WARNING)
984
725
985
726
if server_settings["servicename"] != "Mandos":
986
syslogger.setFormatter(logging.Formatter
727
syslogger.setFormatter(logging.Formatter\
987
728
('Mandos (%s): %%(levelname)s:'
988
729
' %%(message)s'
989
730
% server_settings["servicename"]))
992
733
client_defaults = { "timeout": "1h",
993
734
"interval": "5m",
994
735
"checker": "fping -q -- %%(host)s",
995
"host": "",
996
736
}
997
737
client_config = ConfigParser.SafeConfigParser(client_defaults)
998
738
client_config.read(os.path.join(server_settings["configdir"],
999
739
"clients.conf"))
1000
740
1001
clients = Set()
1002
tcp_server = IPv6_TCPServer((server_settings["address"],
1003
server_settings["port"]),
1004
TCP_handler,
1005
settings=server_settings,
1006
clients=clients)
1007
pidfilename = "/var/run/mandos.pid"
1008
try:
1009
pidfile = open(pidfilename, "w")
1010
except IOError:
1011
logger.error("Could not open file %r", pidfilename)
1012
1013
try:
1014
uid = pwd.getpwnam("_mandos").pw_uid
1015
gid = pwd.getpwnam("_mandos").pw_gid
1016
except KeyError:
1017
try:
1018
uid = pwd.getpwnam("mandos").pw_uid
1019
gid = pwd.getpwnam("mandos").pw_gid
1020
except KeyError:
1021
try:
1022
uid = pwd.getpwnam("nobody").pw_uid
1023
gid = pwd.getpwnam("nogroup").pw_gid
1024
except KeyError:
1025
uid = 65534
1026
gid = 65534
1027
try:
1028
os.setgid(gid)
1029
os.setuid(uid)
1030
except OSError, error:
1031
if error[0] != errno.EPERM:
1032
raise error
1033
1034
# Enable all possible GnuTLS debugging
1035
if debug:
1036
# "Use a log level over 10 to enable all debugging options."
1037
# - GnuTLS manual
1038
gnutls.library.functions.gnutls_global_set_log_level(11)
1039
1040
@gnutls.library.types.gnutls_log_func
1041
def debug_gnutls(level, string):
1042
logger.debug("GnuTLS: %s", string[:-1])
1043
1044
(gnutls.library.functions
1045
.gnutls_global_set_log_function(debug_gnutls))
1046
1047
741
global service
1048
742
service = AvahiService(name = server_settings["servicename"],
1049
servicetype = "_mandos._tcp", )
743
type = "_mandos._tcp", );
1050
744
if server_settings["interface"]:
1051
service.interface = (if_nametoindex
1052
(server_settings["interface"]))
745
service.interface = if_nametoindex(server_settings["interface"])
1053
746
1054
747
global main_loop
1055
748
global bus
1058
751
DBusGMainLoop(set_as_default=True )
1059
752
main_loop = gobject.MainLoop()
1060
753
bus = dbus.SystemBus()
1061
server = dbus.Interface(bus.get_object(avahi.DBUS_NAME,
1062
avahi.DBUS_PATH_SERVER),
1063
avahi.DBUS_INTERFACE_SERVER)
754
server = dbus.Interface(
755
bus.get_object( avahi.DBUS_NAME, avahi.DBUS_PATH_SERVER ),
756
avahi.DBUS_INTERFACE_SERVER )
1064
757
# End of Avahi example code
1065
if use_dbus:
1066
bus_name = dbus.service.BusName(u"se.bsnet.fukt.Mandos", bus)
758
759
clients = Set()
760
def remove_from_clients(client):
761
clients.remove(client)
762
if not clients:
763
logger.critical(u"No clients left, exiting")
764
sys.exit()
1067
765
1068
766
clients.update(Set(Client(name = section,
767
stop_hook = remove_from_clients,
1069
768
config
1070
= dict(client_config.items(section)),
1071
use_dbus = use_dbus)
769
= dict(client_config.items(section)))
1072
770
for section in client_config.sections()))
1073
771
if not clients:
1074
logger.warning(u"No clients defined")
772
logger.critical(u"No clients defined")
773
sys.exit(1)
1075
774
1076
if debug:
1077
# Redirect stdin so all checkers get /dev/null
1078
null = os.open(os.path.devnull, os.O_NOCTTY | os.O_RDWR)
1079
os.dup2(null, sys.stdin.fileno())
1080
if null > 2:
1081
os.close(null)
1082
else:
1083
# No console logging
775
if not debug:
1084
776
logger.removeHandler(console)
1085
# Close all input and output, do double fork, etc.
1086
777
daemon()
1087
778
779
pidfilename = "/var/run/mandos/mandos.pid"
780
pid = os.getpid()
1088
781
try:
1089
pid = os.getpid()
782
pidfile = open(pidfilename, "w")
1090
783
pidfile.write(str(pid) + "\n")
1091
784
pidfile.close()
1092
785
del pidfile
1093
except IOError:
1094
logger.error(u"Could not write to file %r with PID %d",
1095
pidfilename, pid)
1096
except NameError:
1097
# "pidfile" was never created
1098
pass
1099
del pidfilename
786
except IOError, err:
787
logger.error(u"Could not write %s file with PID %d",
788
pidfilename, os.getpid())
1100
789
1101
790
def cleanup():
1102
791
"Cleanup function; run on exit"
1109
798
1110
799
while clients:
1111
800
client = clients.pop()
1112
client.disable_hook = None
1113
client.disable()
801
client.stop_hook = None
802
client.stop()
1114
803
1115
804
atexit.register(cleanup)
1116
805
1119
808
signal.signal(signal.SIGHUP, lambda signum, frame: sys.exit())
1120
809
signal.signal(signal.SIGTERM, lambda signum, frame: sys.exit())
1121
810
1122
if use_dbus:
1123
class MandosServer(dbus.service.Object):
1124
"""A D-Bus proxy object"""
1125
def __init__(self):
1126
dbus.service.Object.__init__(self, bus, "/")
1127
_interface = u"se.bsnet.fukt.Mandos"
1128
1129
@dbus.service.signal(_interface, signature="oa{sv}")
1130
def ClientAdded(self, objpath, properties):
1131
"D-Bus signal"
1132
pass
1133
1134
@dbus.service.signal(_interface, signature="os")
1135
def ClientRemoved(self, objpath, name):
1136
"D-Bus signal"
1137
pass
1138
1139
@dbus.service.method(_interface, out_signature="ao")
1140
def GetAllClients(self):
1141
"D-Bus method"
1142
return dbus.Array(c.dbus_object_path for c in clients)
1143
1144
@dbus.service.method(_interface, out_signature="a{oa{sv}}")
1145
def GetAllClientsWithProperties(self):
1146
"D-Bus method"
1147
return dbus.Dictionary(
1148
((c.dbus_object_path, c.GetAllProperties())
1149
for c in clients),
1150
signature="oa{sv}")
1151
1152
@dbus.service.method(_interface, in_signature="o")
1153
def RemoveClient(self, object_path):
1154
"D-Bus method"
1155
for c in clients:
1156
if c.dbus_object_path == object_path:
1157
clients.remove(c)
1158
# Don't signal anything except ClientRemoved
1159
c.use_dbus = False
1160
c.disable()
1161
# Emit D-Bus signal
1162
self.ClientRemoved(object_path, c.name)
1163
return
1164
raise KeyError
1165
1166
del _interface
1167
1168
mandos_server = MandosServer()
1169
1170
811
for client in clients:
1171
if use_dbus:
1172
# Emit D-Bus signal
1173
mandos_server.ClientAdded(client.dbus_object_path,
1174
client.GetAllProperties())
1175
client.enable()
1176
1177
tcp_server.enable()
1178
tcp_server.server_activate()
1179
812
client.start()
813
814
tcp_server = IPv6_TCPServer((server_settings["address"],
815
server_settings["port"]),
816
tcp_handler,
817
settings=server_settings,
818
clients=clients)
1180
819
# Find out what port we got
1181
820
service.port = tcp_server.socket.getsockname()[1]
1182
821
logger.info(u"Now listening on address %r, port %d, flowinfo %d,"
1196
835
1197
836
gobject.io_add_watch(tcp_server.fileno(), gobject.IO_IN,
1198
837
lambda *args, **kwargs:
1199
(tcp_server.handle_request
1200
(*args[2:], **kwargs) or True))
838
tcp_server.handle_request\
839
(*args[2:], **kwargs) or True)
1201
840
1202
841
logger.debug(u"Starting main loop")
842
main_loop_started = True
1203
843
main_loop.run()
1204
844
except AvahiError, error:
1205
logger.critical(u"AvahiError: %s", error)
845
logger.critical(u"AvahiError: %s" + unicode(error))
1206
846
sys.exit(1)
1207
847
except KeyboardInterrupt:
1208
848
if debug:
1209
print >> sys.stderr
1210
logger.debug("Server received KeyboardInterrupt")
1211
logger.debug("Server exiting")
849
print
1212
850
1213
851
if __name__ == '__main__':
1214
852
main()
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Version: 2.0.2.dev0