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- Committer: Teddy Hogeborn
- Date: 2008-08-02 21:06:12 UTC
- Revision ID: teddy@fukt.bsnet.se-20080802210612-4c1waup4z0f66ya7
Non-tested commit for merge purposes.
* plugbasedclient.c (getplugin, addargument, set_cloexec): Made static.
* plugins.d/passprompt.c (termination_handler): Made static.
* plugbasedclient.c (getplugin, addargument, set_cloexec): Made static.
* plugins.d/passprompt.c (termination_handler): Made static.
- files added:
- ca.pem
- files removed:
- .bzr-builddeb
- debian
- debian/po
- files renamed:
- plugin-runner.c => plugbasedclient.c
- plugins.d/mandos-client.c => plugins.d/mandosclient.c
- plugins.d/password-prompt.c => plugins.d/passprompt.c
- mandos.conf => server.conf
- mandos => server.py
- files modified:
- Makefile
added
removed
server.py
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6
# This program is partly derived from an example program for an Avahi
7
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# service publisher, downloaded from
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# <http://avahi.org/wiki/PythonPublishExample>. This includes the
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# methods "add" and "remove" in the "AvahiService" class, the
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# "server_state_changed" and "entry_group_state_changed" functions,
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# and some lines in "main".
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# following functions: "AvahiService.add", "AvahiService.remove",
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# "server_state_changed", "entry_group_state_changed", and some lines
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# 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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version = "1.0.8"
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# Brief description of the operation of this program:
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#
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# This server announces itself as a Zeroconf service. Connecting
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# clients use the TLS protocol, with the unusual quirk that this
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# server program acts as a TLS "client" while a connecting client acts
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# as a TLS "server". The client (acting as a TLS "server") must
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# supply an OpenPGP certificate, and the fingerprint of this
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# certificate is used by this server to look up (in a list read from a
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# file at start time) which binary blob to give the client. No other
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# authentication or authorization is done by this server.
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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:'
77
' %(message)s'))
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syslogger = logging.handlers.SysLogHandler\
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(facility = logging.handlers.SysLogHandler.LOG_DAEMON)
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syslogger.setFormatter(logging.Formatter\
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('%(levelname)s: %(message)s'))
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logger.addHandler(syslogger)
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del 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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logger.addHandler(console)
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class AvahiError(Exception):
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def __init__(self, value, *args, **kwargs):
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def __init__(self, value):
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self.value = value
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super(AvahiError, self).__init__(value, *args, **kwargs)
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def __unicode__(self):
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return unicode(repr(self.value))
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def __str__(self):
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return repr(self.value)
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class AvahiServiceError(AvahiError):
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pass
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class AvahiService(object):
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"""An Avahi (Zeroconf) service.
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Attributes:
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"""
102
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interface: integer; avahi.IF_UNSPEC or an interface index.
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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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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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host: string; Host to publish records for, default is localhost
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max_renames: integer; maximum number of renames
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rename_count: integer; counter so we only rename after collisions
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a sensible number of times
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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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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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host = string; Host to publish records for, default to localhost
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if empty.
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max_renames = integer; maximum number of renames
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rename_count = integer; counter so we only rename after collisions
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a sensible number of times
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113
"""
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def __init__(self, interface = avahi.IF_UNSPEC, name = None,
116
servicetype = None, port = None, TXT = None,
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domain = "", host = "", max_renames = 32768,
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protocol = avahi.PROTO_UNSPEC):
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type = None, port = None, TXT = None, domain = "",
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host = "", max_renames = 12):
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"""An Avahi (Zeroconf) service. """
119
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self.interface = interface
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self.name = name
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self.type = servicetype
120
self.type = type
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self.port = port
123
self.TXT = TXT if TXT is not None else []
122
if TXT is None:
123
self.TXT = []
124
else:
125
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
127
self.max_renames = max_renames
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self.protocol = protocol
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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:
132
logger.critical(u"No suitable Zeroconf service name found"
133
u" after %i retries, exiting.",
134
self.rename_count)
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raise AvahiServiceError(u"Too many renames")
136
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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('Mandos (%s) [%%(process)d]:'
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' %%(levelname)s: %%(message)s'
142
% self.name))
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logger.critical(u"No suitable service name found after %i"
133
u" retries, exiting.", rename_count)
134
raise AvahiServiceError("Too many renames")
135
name = server.GetAlternativeServiceName(name)
136
logger.notice(u"Changing name to %r ...", 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:
154
group = dbus.Interface(bus.get_object
155
(avahi.DBUS_NAME,
148
group = dbus.Interface\
149
(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
164
self.protocol, # protocol
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avahi.PROTO_INET6, # protocol
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dbus.UInt32(0), # flags
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self.name, self.type,
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self.domain, self.host,
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# End of Avahi example code
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def _datetime_to_dbus(dt, variant_level=0):
178
"""Convert a UTC datetime.datetime() to a D-Bus type."""
179
return dbus.String(dt.isoformat(), variant_level=variant_level)
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class Client(object):
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"""A representation of a client host served by this server.
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Attributes:
185
name: string; from the config file, used in log messages and
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D-Bus identifiers
174
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
195
timeout: datetime.timedelta(); How long from last_checked_ok
196
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)
199
checker: subprocess.Popen(); a running checker process used
200
to see if the client lives.
201
'None' if no process is running.
177
secret: bytestring; sent verbatim (over TLS) to client
178
fqdn: string (FQDN); available for use by the checker command
179
created: datetime.datetime(); object creation, not client host
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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
182
until this client is invalid
183
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
186
to see if the client lives.
187
'None' if no process is running.
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checker_initiator_tag: a gobject event source tag, or None
203
disable_initiator_tag: - '' -
189
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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192
client lives. %() expansions are done at
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193
runtime with vars(self) as dict, so that for
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194
instance %(name)s can be used in the command.
209
current_checker_command: string; current running checker_command
195
Private attibutes:
196
_timeout: Real variable for 'timeout'
197
_interval: Real variable for 'interval'
198
_timeout_milliseconds: Used when calling gobject.timeout_add()
199
_interval_milliseconds: - '' -
210
200
"""
211
def timeout_milliseconds(self):
212
"Return the 'timeout' attribute in milliseconds"
213
return ((self.timeout.days * 24 * 60 * 60 * 1000)
214
+ (self.timeout.seconds * 1000)
215
+ (self.timeout.microseconds // 1000))
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def interval_milliseconds(self):
218
"Return the 'interval' attribute in milliseconds"
219
return ((self.interval.days * 24 * 60 * 60 * 1000)
220
+ (self.interval.seconds * 1000)
221
+ (self.interval.microseconds // 1000))
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223
def __init__(self, name = None, disable_hook=None, config=None):
224
"""Note: the 'checker' key in 'config' sets the
225
'checker_command' attribute and *not* the 'checker'
226
attribute."""
201
def _set_timeout(self, timeout):
202
"Setter function for 'timeout' attribute"
203
self._timeout = timeout
204
self._timeout_milliseconds = ((self.timeout.days
205
* 24 * 60 * 60 * 1000)
206
+ (self.timeout.seconds * 1000)
207
+ (self.timeout.microseconds
208
// 1000))
209
timeout = property(lambda self: self._timeout,
210
_set_timeout)
211
del _set_timeout
212
def _set_interval(self, interval):
213
"Setter function for 'interval' attribute"
214
self._interval = interval
215
self._interval_milliseconds = ((self.interval.days
216
* 24 * 60 * 60 * 1000)
217
+ (self.interval.seconds
218
* 1000)
219
+ (self.interval.microseconds
220
// 1000))
221
interval = property(lambda self: self._interval,
222
_set_interval)
223
del _set_interval
224
def __init__(self, name=None, stop_hook=None, fingerprint=None,
225
secret=None, secfile=None, fqdn=None, timeout=None,
226
interval=-1, checker=None):
227
"""Note: the 'checker' argument sets the 'checker_command'
228
attribute and not the 'checker' attribute.."""
227
229
self.name = name
228
if config is None:
229
config = {}
230
230
logger.debug(u"Creating client %r", self.name)
231
# Uppercase and remove spaces from fingerprint for later
232
# comparison purposes with return value from the fingerprint()
233
# function
234
self.fingerprint = (config["fingerprint"].upper()
235
.replace(u" ", u""))
231
# Uppercase and remove spaces from fingerprint
232
# for later comparison purposes with return value of
233
# the fingerprint() function
234
self.fingerprint = fingerprint.upper().replace(u" ", u"")
236
235
logger.debug(u" Fingerprint: %s", self.fingerprint)
237
if "secret" in config:
238
self.secret = config["secret"].decode(u"base64")
239
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()
236
if secret:
237
self.secret = secret.decode(u"base64")
238
elif secfile:
239
sf = open(secfile)
240
self.secret = sf.read()
241
sf.close()
244
242
else:
245
243
raise TypeError(u"No secret or secfile for client %s"
246
244
% self.name)
247
self.host = config.get("host", "")
248
self.created = datetime.datetime.utcnow()
249
self.enabled = False
250
self.last_enabled = None
245
self.fqdn = fqdn
246
self.created = datetime.datetime.now()
251
247
self.last_checked_ok = None
252
self.timeout = string_to_delta(config["timeout"])
253
self.interval = string_to_delta(config["interval"])
254
self.disable_hook = disable_hook
248
self.timeout = string_to_delta(timeout)
249
self.interval = string_to_delta(interval)
250
self.stop_hook = stop_hook
255
251
self.checker = None
256
252
self.checker_initiator_tag = None
257
self.disable_initiator_tag = None
253
self.stop_initiator_tag = None
258
254
self.checker_callback_tag = None
259
self.checker_command = config["checker"]
260
self.current_checker_command = None
261
self.last_connect = None
262
263
def enable(self):
255
self.check_command = checker
256
def start(self):
264
257
"""Start this client's checker and timeout hooks"""
265
self.last_enabled = datetime.datetime.utcnow()
266
258
# Schedule a new checker to be started an 'interval' from now,
267
259
# and every interval from then on.
268
self.checker_initiator_tag = (gobject.timeout_add
269
(self.interval_milliseconds(),
270
self.start_checker))
260
self.checker_initiator_tag = gobject.timeout_add\
261
(self._interval_milliseconds,
262
self.start_checker)
271
263
# Also start a new checker *right now*.
272
264
self.start_checker()
273
# Schedule a disable() when 'timeout' has passed
274
self.disable_initiator_tag = (gobject.timeout_add
275
(self.timeout_milliseconds(),
276
self.disable))
277
self.enabled = True
278
279
def disable(self):
280
"""Disable this client."""
281
if not getattr(self, "enabled", False):
265
# Schedule a stop() when 'timeout' has passed
266
self.stop_initiator_tag = gobject.timeout_add\
267
(self._timeout_milliseconds,
268
self.stop)
269
def stop(self):
270
"""Stop this client.
271
The possibility that a client might be restarted is left open,
272
but not currently used."""
273
# If this client doesn't have a secret, it is already stopped.
274
if self.secret:
275
logger.debug(u"Stopping client %s", self.name)
276
self.secret = None
277
else:
282
278
return False
283
logger.info(u"Disabling client %s", self.name)
284
if getattr(self, "disable_initiator_tag", False):
285
gobject.source_remove(self.disable_initiator_tag)
286
self.disable_initiator_tag = None
279
if getattr(self, "stop_initiator_tag", False):
280
gobject.source_remove(self.stop_initiator_tag)
281
self.stop_initiator_tag = None
287
282
if getattr(self, "checker_initiator_tag", False):
288
283
gobject.source_remove(self.checker_initiator_tag)
289
284
self.checker_initiator_tag = None
290
285
self.stop_checker()
291
if self.disable_hook:
292
self.disable_hook(self)
293
self.enabled = False
286
if self.stop_hook:
287
self.stop_hook(self)
294
288
# Do not run this again if called by a gobject.timeout_add
295
289
return False
296
297
290
def __del__(self):
298
self.disable_hook = None
299
self.disable()
300
301
def checker_callback(self, pid, condition, command):
291
self.stop_hook = None
292
self.stop()
293
def checker_callback(self, pid, condition):
302
294
"""The checker has completed, so take appropriate actions."""
295
now = datetime.datetime.now()
303
296
self.checker_callback_tag = None
304
297
self.checker = None
305
if os.WIFEXITED(condition):
306
exitstatus = os.WEXITSTATUS(condition)
307
if exitstatus == 0:
308
logger.info(u"Checker for %(name)s succeeded",
309
vars(self))
310
self.checked_ok()
311
else:
312
logger.info(u"Checker for %(name)s failed",
313
vars(self))
314
else:
298
if os.WIFEXITED(condition) \
299
and (os.WEXITSTATUS(condition) == 0):
300
logger.debug(u"Checker for %(name)s succeeded",
301
vars(self))
302
self.last_checked_ok = now
303
gobject.source_remove(self.stop_initiator_tag)
304
self.stop_initiator_tag = gobject.timeout_add\
305
(self._timeout_milliseconds,
306
self.stop)
307
elif not os.WIFEXITED(condition):
315
308
logger.warning(u"Checker for %(name)s crashed?",
316
309
vars(self))
317
318
def checked_ok(self):
319
"""Bump up the timeout for this client.
320
This should only be called when the client has been seen,
321
alive and well.
322
"""
323
self.last_checked_ok = datetime.datetime.utcnow()
324
gobject.source_remove(self.disable_initiator_tag)
325
self.disable_initiator_tag = (gobject.timeout_add
326
(self.timeout_milliseconds(),
327
self.disable))
328
310
else:
311
logger.debug(u"Checker for %(name)s failed",
312
vars(self))
329
313
def start_checker(self):
330
314
"""Start a new checker subprocess if one is not running.
331
315
If a checker already exists, leave it running and do
338
322
# checkers alone, the checker would have to take more time
339
323
# than 'timeout' for the client to be declared invalid, which
340
324
# is as it should be.
341
342
# If a checker exists, make sure it is not a zombie
343
if self.checker is not None:
344
pid, status = os.waitpid(self.checker.pid, os.WNOHANG)
345
if pid:
346
logger.warning("Checker was a zombie")
347
gobject.source_remove(self.checker_callback_tag)
348
self.checker_callback(pid, status,
349
self.current_checker_command)
350
# Start a new checker if needed
351
325
if self.checker is None:
352
326
try:
353
# In case checker_command has exactly one % operator
354
command = self.checker_command % self.host
327
# In case check_command has exactly one % operator
328
command = self.check_command % self.fqdn
355
329
except TypeError:
356
330
# Escape attributes for the shell
357
331
escaped_attrs = dict((key, re.escape(str(val)))
358
332
for key, val in
359
333
vars(self).iteritems())
360
334
try:
361
command = self.checker_command % escaped_attrs
335
command = self.check_command % escaped_attrs
362
336
except TypeError, error:
363
337
logger.error(u'Could not format string "%s":'
364
u' %s', self.checker_command, error)
338
u' %s', self.check_command, error)
365
339
return True # Try again later
366
self.current_checker_command = command
367
340
try:
368
logger.info(u"Starting checker %r for %s",
369
command, self.name)
370
# We don't need to redirect stdout and stderr, since
371
# in normal mode, that is already done by daemon(),
372
# and in debug mode we don't want to. (Stdin is
373
# always replaced by /dev/null.)
341
logger.debug(u"Starting checker %r for %s",
342
command, self.name)
374
343
self.checker = subprocess.Popen(command,
375
344
close_fds=True,
376
345
shell=True, cwd="/")
377
self.checker_callback_tag = (gobject.child_watch_add
378
(self.checker.pid,
379
self.checker_callback,
380
data=command))
381
# The checker may have completed before the gobject
382
# watch was added. Check for this.
383
pid, status = os.waitpid(self.checker.pid, os.WNOHANG)
384
if pid:
385
gobject.source_remove(self.checker_callback_tag)
386
self.checker_callback(pid, status, command)
387
except OSError, error:
346
self.checker_callback_tag = gobject.child_watch_add\
347
(self.checker.pid,
348
self.checker_callback)
349
except subprocess.OSError, error:
388
350
logger.error(u"Failed to start subprocess: %s",
389
351
error)
390
352
# Re-run this periodically if run by gobject.timeout_add
391
353
return True
392
393
354
def stop_checker(self):
394
355
"""Force the checker process, if any, to stop."""
395
356
if self.checker_callback_tag:
397
358
self.checker_callback_tag = None
398
359
if getattr(self, "checker", None) is None:
399
360
return
400
logger.debug(u"Stopping checker for %(name)s", vars(self))
361
logger.debug("Stopping checker for %(name)s", vars(self))
401
362
try:
402
363
os.kill(self.checker.pid, signal.SIGTERM)
403
364
#os.sleep(0.5)
407
368
if error.errno != errno.ESRCH: # No such process
408
369
raise
409
370
self.checker = None
410
411
371
def still_valid(self):
412
372
"""Has the timeout not yet passed for this client?"""
413
if not getattr(self, "enabled", False):
414
return False
415
now = datetime.datetime.utcnow()
373
now = datetime.datetime.now()
416
374
if self.last_checked_ok is None:
417
375
return now < (self.created + self.timeout)
418
376
else:
419
377
return now < (self.last_checked_ok + self.timeout)
420
378
421
379
422
class ClientDBus(Client, dbus.service.Object):
423
"""A Client class using D-Bus
424
Attributes:
425
dbus_object_path: dbus.ObjectPath ; only set if self.use_dbus
426
"""
427
# dbus.service.Object doesn't use super(), so we can't either.
428
429
def __init__(self, *args, **kwargs):
430
Client.__init__(self, *args, **kwargs)
431
# Only now, when this client is initialized, can it show up on
432
# the D-Bus
433
self.dbus_object_path = (dbus.ObjectPath
434
("/clients/"
435
+ self.name.replace(".", "_")))
436
dbus.service.Object.__init__(self, bus,
437
self.dbus_object_path)
438
def enable(self):
439
oldstate = getattr(self, "enabled", False)
440
r = Client.enable(self)
441
if oldstate != self.enabled:
442
# Emit D-Bus signals
443
self.PropertyChanged(dbus.String(u"enabled"),
444
dbus.Boolean(True, variant_level=1))
445
self.PropertyChanged(dbus.String(u"last_enabled"),
446
(_datetime_to_dbus(self.last_enabled,
447
variant_level=1)))
448
return r
449
450
def disable(self, signal = True):
451
oldstate = getattr(self, "enabled", False)
452
r = Client.disable(self)
453
if signal and oldstate != self.enabled:
454
# Emit D-Bus signal
455
self.PropertyChanged(dbus.String(u"enabled"),
456
dbus.Boolean(False, variant_level=1))
457
return r
458
459
def __del__(self, *args, **kwargs):
460
try:
461
self.remove_from_connection()
462
except LookupError:
463
pass
464
if hasattr(dbus.service.Object, "__del__"):
465
dbus.service.Object.__del__(self, *args, **kwargs)
466
Client.__del__(self, *args, **kwargs)
467
468
def checker_callback(self, pid, condition, command,
469
*args, **kwargs):
470
self.checker_callback_tag = None
471
self.checker = None
472
# Emit D-Bus signal
473
self.PropertyChanged(dbus.String(u"checker_running"),
474
dbus.Boolean(False, variant_level=1))
475
if os.WIFEXITED(condition):
476
exitstatus = os.WEXITSTATUS(condition)
477
# Emit D-Bus signal
478
self.CheckerCompleted(dbus.Int16(exitstatus),
479
dbus.Int64(condition),
480
dbus.String(command))
481
else:
482
# Emit D-Bus signal
483
self.CheckerCompleted(dbus.Int16(-1),
484
dbus.Int64(condition),
485
dbus.String(command))
486
487
return Client.checker_callback(self, pid, condition, command,
488
*args, **kwargs)
489
490
def checked_ok(self, *args, **kwargs):
491
r = Client.checked_ok(self, *args, **kwargs)
492
# Emit D-Bus signal
493
self.PropertyChanged(
494
dbus.String(u"last_checked_ok"),
495
(_datetime_to_dbus(self.last_checked_ok,
496
variant_level=1)))
497
return r
498
499
def start_checker(self, *args, **kwargs):
500
old_checker = self.checker
501
if self.checker is not None:
502
old_checker_pid = self.checker.pid
503
else:
504
old_checker_pid = None
505
r = Client.start_checker(self, *args, **kwargs)
506
# Only if new checker process was started
507
if (self.checker is not None
508
and old_checker_pid != self.checker.pid):
509
# Emit D-Bus signal
510
self.CheckerStarted(self.current_checker_command)
511
self.PropertyChanged(
512
dbus.String("checker_running"),
513
dbus.Boolean(True, variant_level=1))
514
return r
515
516
def stop_checker(self, *args, **kwargs):
517
old_checker = getattr(self, "checker", None)
518
r = Client.stop_checker(self, *args, **kwargs)
519
if (old_checker is not None
520
and getattr(self, "checker", None) is None):
521
self.PropertyChanged(dbus.String(u"checker_running"),
522
dbus.Boolean(False, variant_level=1))
523
return r
524
525
## D-Bus methods & signals
526
_interface = u"se.bsnet.fukt.Mandos.Client"
527
528
# CheckedOK - method
529
CheckedOK = dbus.service.method(_interface)(checked_ok)
530
CheckedOK.__name__ = "CheckedOK"
531
532
# CheckerCompleted - signal
533
@dbus.service.signal(_interface, signature="nxs")
534
def CheckerCompleted(self, exitcode, waitstatus, command):
535
"D-Bus signal"
536
pass
537
538
# CheckerStarted - signal
539
@dbus.service.signal(_interface, signature="s")
540
def CheckerStarted(self, command):
541
"D-Bus signal"
542
pass
543
544
# GetAllProperties - method
545
@dbus.service.method(_interface, out_signature="a{sv}")
546
def GetAllProperties(self):
547
"D-Bus method"
548
return dbus.Dictionary({
549
dbus.String("name"):
550
dbus.String(self.name, variant_level=1),
551
dbus.String("fingerprint"):
552
dbus.String(self.fingerprint, variant_level=1),
553
dbus.String("host"):
554
dbus.String(self.host, variant_level=1),
555
dbus.String("created"):
556
_datetime_to_dbus(self.created, variant_level=1),
557
dbus.String("last_enabled"):
558
(_datetime_to_dbus(self.last_enabled,
559
variant_level=1)
560
if self.last_enabled is not None
561
else dbus.Boolean(False, variant_level=1)),
562
dbus.String("enabled"):
563
dbus.Boolean(self.enabled, variant_level=1),
564
dbus.String("last_checked_ok"):
565
(_datetime_to_dbus(self.last_checked_ok,
566
variant_level=1)
567
if self.last_checked_ok is not None
568
else dbus.Boolean (False, variant_level=1)),
569
dbus.String("timeout"):
570
dbus.UInt64(self.timeout_milliseconds(),
571
variant_level=1),
572
dbus.String("interval"):
573
dbus.UInt64(self.interval_milliseconds(),
574
variant_level=1),
575
dbus.String("checker"):
576
dbus.String(self.checker_command,
577
variant_level=1),
578
dbus.String("checker_running"):
579
dbus.Boolean(self.checker is not None,
580
variant_level=1),
581
dbus.String("object_path"):
582
dbus.ObjectPath(self.dbus_object_path,
583
variant_level=1)
584
}, signature="sv")
585
586
# IsStillValid - method
587
@dbus.service.method(_interface, out_signature="b")
588
def IsStillValid(self):
589
return self.still_valid()
590
591
# PropertyChanged - signal
592
@dbus.service.signal(_interface, signature="sv")
593
def PropertyChanged(self, property, value):
594
"D-Bus signal"
595
pass
596
597
# ReceivedSecret - signal
598
@dbus.service.signal(_interface)
599
def ReceivedSecret(self):
600
"D-Bus signal"
601
pass
602
603
# Rejected - signal
604
@dbus.service.signal(_interface)
605
def Rejected(self):
606
"D-Bus signal"
607
pass
608
609
# SetChecker - method
610
@dbus.service.method(_interface, in_signature="s")
611
def SetChecker(self, checker):
612
"D-Bus setter method"
613
self.checker_command = checker
614
# Emit D-Bus signal
615
self.PropertyChanged(dbus.String(u"checker"),
616
dbus.String(self.checker_command,
617
variant_level=1))
618
619
# SetHost - method
620
@dbus.service.method(_interface, in_signature="s")
621
def SetHost(self, host):
622
"D-Bus setter method"
623
self.host = host
624
# Emit D-Bus signal
625
self.PropertyChanged(dbus.String(u"host"),
626
dbus.String(self.host, variant_level=1))
627
628
# SetInterval - method
629
@dbus.service.method(_interface, in_signature="t")
630
def SetInterval(self, milliseconds):
631
self.interval = datetime.timedelta(0, 0, 0, milliseconds)
632
# Emit D-Bus signal
633
self.PropertyChanged(dbus.String(u"interval"),
634
(dbus.UInt64(self.interval_milliseconds(),
635
variant_level=1)))
636
637
# SetSecret - method
638
@dbus.service.method(_interface, in_signature="ay",
639
byte_arrays=True)
640
def SetSecret(self, secret):
641
"D-Bus setter method"
642
self.secret = str(secret)
643
644
# SetTimeout - method
645
@dbus.service.method(_interface, in_signature="t")
646
def SetTimeout(self, milliseconds):
647
self.timeout = datetime.timedelta(0, 0, 0, milliseconds)
648
# Emit D-Bus signal
649
self.PropertyChanged(dbus.String(u"timeout"),
650
(dbus.UInt64(self.timeout_milliseconds(),
651
variant_level=1)))
652
653
# Enable - method
654
Enable = dbus.service.method(_interface)(enable)
655
Enable.__name__ = "Enable"
656
657
# StartChecker - method
658
@dbus.service.method(_interface)
659
def StartChecker(self):
660
"D-Bus method"
661
self.start_checker()
662
663
# Disable - method
664
@dbus.service.method(_interface)
665
def Disable(self):
666
"D-Bus method"
667
self.disable()
668
669
# StopChecker - method
670
StopChecker = dbus.service.method(_interface)(stop_checker)
671
StopChecker.__name__ = "StopChecker"
672
673
del _interface
674
675
676
380
def peer_certificate(session):
677
381
"Return the peer's OpenPGP certificate as a bytestring"
678
382
# If not an OpenPGP certificate...
679
if (gnutls.library.functions
680
.gnutls_certificate_type_get(session._c_object)
681
!= gnutls.library.constants.GNUTLS_CRT_OPENPGP):
383
if gnutls.library.functions.gnutls_certificate_type_get\
384
(session._c_object) \
385
!= gnutls.library.constants.GNUTLS_CRT_OPENPGP:
682
386
# ...do the normal thing
683
387
return session.peer_certificate
684
list_size = ctypes.c_uint(1)
685
cert_list = (gnutls.library.functions
686
.gnutls_certificate_get_peers
687
(session._c_object, ctypes.byref(list_size)))
688
if not bool(cert_list) and list_size.value != 0:
689
raise gnutls.errors.GNUTLSError("error getting peer"
690
" certificate")
388
list_size = ctypes.c_uint()
389
cert_list = gnutls.library.functions.gnutls_certificate_get_peers\
390
(session._c_object, ctypes.byref(list_size))
691
391
if list_size.value == 0:
692
392
return None
693
393
cert = cert_list[0]
696
396
697
397
def fingerprint(openpgp):
698
398
"Convert an OpenPGP bytestring to a hexdigit fingerprint string"
699
# New GnuTLS "datum" with the OpenPGP public key
700
datum = (gnutls.library.types
701
.gnutls_datum_t(ctypes.cast(ctypes.c_char_p(openpgp),
702
ctypes.POINTER
703
(ctypes.c_ubyte)),
704
ctypes.c_uint(len(openpgp))))
705
399
# New empty GnuTLS certificate
706
400
crt = gnutls.library.types.gnutls_openpgp_crt_t()
707
(gnutls.library.functions
708
.gnutls_openpgp_crt_init(ctypes.byref(crt)))
401
gnutls.library.functions.gnutls_openpgp_crt_init\
402
(ctypes.byref(crt))
403
# New GnuTLS "datum" with the OpenPGP public key
404
datum = gnutls.library.types.gnutls_datum_t\
405
(ctypes.cast(ctypes.c_char_p(openpgp),
406
ctypes.POINTER(ctypes.c_ubyte)),
407
ctypes.c_uint(len(openpgp)))
709
408
# Import the OpenPGP public key into the certificate
710
(gnutls.library.functions
711
.gnutls_openpgp_crt_import(crt, ctypes.byref(datum),
712
gnutls.library.constants
713
.GNUTLS_OPENPGP_FMT_RAW))
714
# Verify the self signature in the key
715
crtverify = ctypes.c_uint()
716
(gnutls.library.functions
717
.gnutls_openpgp_crt_verify_self(crt, 0, ctypes.byref(crtverify)))
718
if crtverify.value != 0:
719
gnutls.library.functions.gnutls_openpgp_crt_deinit(crt)
720
raise gnutls.errors.CertificateSecurityError("Verify failed")
409
ret = gnutls.library.functions.gnutls_openpgp_crt_import\
410
(crt,
411
ctypes.byref(datum),
412
gnutls.library.constants.GNUTLS_OPENPGP_FMT_RAW)
721
413
# New buffer for the fingerprint
722
buf = ctypes.create_string_buffer(20)
723
buf_len = ctypes.c_size_t()
414
buffer = ctypes.create_string_buffer(20)
415
buffer_length = ctypes.c_size_t()
724
416
# Get the fingerprint from the certificate into the buffer
725
(gnutls.library.functions
726
.gnutls_openpgp_crt_get_fingerprint(crt, ctypes.byref(buf),
727
ctypes.byref(buf_len)))
417
gnutls.library.functions.gnutls_openpgp_crt_get_fingerprint\
418
(crt, ctypes.byref(buffer), ctypes.byref(buffer_length))
728
419
# Deinit the certificate
729
420
gnutls.library.functions.gnutls_openpgp_crt_deinit(crt)
730
421
# Convert the buffer to a Python bytestring
731
fpr = ctypes.string_at(buf, buf_len.value)
422
fpr = ctypes.string_at(buffer, buffer_length.value)
732
423
# Convert the bytestring to hexadecimal notation
733
424
hex_fpr = u''.join(u"%02X" % ord(char) for char in fpr)
734
425
return hex_fpr
735
426
736
427
737
class TCP_handler(SocketServer.BaseRequestHandler, object):
428
class tcp_handler(SocketServer.BaseRequestHandler, object):
738
429
"""A TCP request handler class.
739
430
Instantiated by IPv6_TCPServer for each request to handle it.
740
431
Note: This will run in its own forked process."""
741
432
742
433
def handle(self):
743
logger.info(u"TCP connection from: %s",
744
unicode(self.client_address))
745
logger.debug(u"IPC Pipe FD: %d", self.server.pipe[1])
746
# Open IPC pipe to parent process
747
with closing(os.fdopen(self.server.pipe[1], "w", 1)) as ipc:
748
session = (gnutls.connection
749
.ClientSession(self.request,
750
gnutls.connection
751
.X509Credentials()))
752
753
line = self.request.makefile().readline()
754
logger.debug(u"Protocol version: %r", line)
755
try:
756
if int(line.strip().split()[0]) > 1:
757
raise RuntimeError
758
except (ValueError, IndexError, RuntimeError), error:
759
logger.error(u"Unknown protocol version: %s", error)
760
return
761
762
# Note: gnutls.connection.X509Credentials is really a
763
# generic GnuTLS certificate credentials object so long as
764
# no X.509 keys are added to it. Therefore, we can use it
765
# here despite using OpenPGP certificates.
766
767
#priority = ':'.join(("NONE", "+VERS-TLS1.1",
768
# "+AES-256-CBC", "+SHA1",
769
# "+COMP-NULL", "+CTYPE-OPENPGP",
770
# "+DHE-DSS"))
771
# Use a fallback default, since this MUST be set.
772
priority = self.server.settings.get("priority", "NORMAL")
773
(gnutls.library.functions
774
.gnutls_priority_set_direct(session._c_object,
775
priority, None))
776
777
try:
778
session.handshake()
779
except gnutls.errors.GNUTLSError, error:
780
logger.warning(u"Handshake failed: %s", error)
781
# Do not run session.bye() here: the session is not
782
# established. Just abandon the request.
783
return
784
logger.debug(u"Handshake succeeded")
785
try:
786
fpr = fingerprint(peer_certificate(session))
787
except (TypeError, gnutls.errors.GNUTLSError), error:
788
logger.warning(u"Bad certificate: %s", error)
789
session.bye()
790
return
791
logger.debug(u"Fingerprint: %s", fpr)
792
793
for c in self.server.clients:
794
if c.fingerprint == fpr:
795
client = c
796
break
797
else:
798
logger.warning(u"Client not found for fingerprint: %s",
799
fpr)
800
ipc.write("NOTFOUND %s\n" % fpr)
801
session.bye()
802
return
803
# Have to check if client.still_valid(), since it is
804
# possible that the client timed out while establishing
805
# the GnuTLS session.
806
if not client.still_valid():
807
logger.warning(u"Client %(name)s is invalid",
808
vars(client))
809
ipc.write("INVALID %s\n" % client.name)
810
session.bye()
811
return
812
ipc.write("SENDING %s\n" % client.name)
813
sent_size = 0
814
while sent_size < len(client.secret):
815
sent = session.send(client.secret[sent_size:])
816
logger.debug(u"Sent: %d, remaining: %d",
817
sent, len(client.secret)
818
- (sent_size + sent))
819
sent_size += sent
820
session.bye()
821
822
823
class ForkingMixInWithPipe(SocketServer.ForkingMixIn, object):
824
"""Like SocketServer.ForkingMixIn, but also pass a pipe.
825
Assumes a gobject.MainLoop event loop.
826
"""
827
def process_request(self, request, client_address):
828
"""This overrides and wraps the original process_request().
829
This function creates a new pipe in self.pipe
830
"""
831
self.pipe = os.pipe()
832
super(ForkingMixInWithPipe,
833
self).process_request(request, client_address)
834
os.close(self.pipe[1]) # close write end
835
# Call "handle_ipc" for both data and EOF events
836
gobject.io_add_watch(self.pipe[0],
837
gobject.IO_IN | gobject.IO_HUP,
838
self.handle_ipc)
839
def handle_ipc(source, condition):
840
"""Dummy function; override as necessary"""
841
os.close(source)
842
return False
843
844
845
class IPv6_TCPServer(ForkingMixInWithPipe,
846
SocketServer.TCPServer, object):
847
"""IPv6-capable TCP server. Accepts 'None' as address and/or port
434
logger.debug(u"TCP connection from: %s",
435
unicode(self.client_address))
436
session = gnutls.connection.ClientSession\
437
(self.request, gnutls.connection.X509Credentials())
438
# Note: gnutls.connection.X509Credentials is really a generic
439
# GnuTLS certificate credentials object so long as no X.509
440
# keys are added to it. Therefore, we can use it here despite
441
# using OpenPGP certificates.
442
443
#priority = ':'.join(("NONE", "+VERS-TLS1.1", "+AES-256-CBC",
444
# "+SHA1", "+COMP-NULL", "+CTYPE-OPENPGP",
445
# "+DHE-DSS"))
446
priority = "NORMAL" # Fallback default, since this
447
# MUST be set.
448
if self.server.settings["priority"]:
449
priority = self.server.settings["priority"]
450
gnutls.library.functions.gnutls_priority_set_direct\
451
(session._c_object, priority, None);
452
453
try:
454
session.handshake()
455
except gnutls.errors.GNUTLSError, error:
456
logger.debug(u"Handshake failed: %s", error)
457
# Do not run session.bye() here: the session is not
458
# established. Just abandon the request.
459
return
460
try:
461
fpr = fingerprint(peer_certificate(session))
462
except (TypeError, gnutls.errors.GNUTLSError), error:
463
logger.debug(u"Bad certificate: %s", error)
464
session.bye()
465
return
466
logger.debug(u"Fingerprint: %s", fpr)
467
client = None
468
for c in self.server.clients:
469
if c.fingerprint == fpr:
470
client = c
471
break
472
if not client:
473
logger.debug(u"Client not found for fingerprint: %s", fpr)
474
session.bye()
475
return
476
# Have to check if client.still_valid(), since it is possible
477
# that the client timed out while establishing the GnuTLS
478
# session.
479
if not client.still_valid():
480
logger.debug(u"Client %(name)s is invalid", vars(client))
481
session.bye()
482
return
483
sent_size = 0
484
while sent_size < len(client.secret):
485
sent = session.send(client.secret[sent_size:])
486
logger.debug(u"Sent: %d, remaining: %d",
487
sent, len(client.secret)
488
- (sent_size + sent))
489
sent_size += sent
490
session.bye()
491
492
493
class IPv6_TCPServer(SocketServer.ForkingTCPServer, object):
494
"""IPv6 TCP server. Accepts 'None' as address and/or port.
848
495
Attributes:
849
496
settings: Server settings
850
497
clients: Set() of Client objects
851
enabled: Boolean; whether this server is activated yet
852
498
"""
853
499
address_family = socket.AF_INET6
854
500
def __init__(self, *args, **kwargs):
858
504
if "clients" in kwargs:
859
505
self.clients = kwargs["clients"]
860
506
del kwargs["clients"]
861
if "use_ipv6" in kwargs:
862
if not kwargs["use_ipv6"]:
863
self.address_family = socket.AF_INET
864
del kwargs["use_ipv6"]
865
self.enabled = False
866
super(IPv6_TCPServer, self).__init__(*args, **kwargs)
507
return super(type(self), self).__init__(*args, **kwargs)
867
508
def server_bind(self):
868
509
"""This overrides the normal server_bind() function
869
510
to bind to an interface if one was specified, and also NOT to
877
518
self.settings["interface"])
878
519
except socket.error, error:
879
520
if error[0] == errno.EPERM:
880
logger.error(u"No permission to"
881
u" bind to interface %s",
882
self.settings["interface"])
521
logger.warning(u"No permission to"
522
u" bind to interface %s",
523
self.settings["interface"])
883
524
else:
884
raise
525
raise error
885
526
# Only bind(2) the socket if we really need to.
886
527
if self.server_address[0] or self.server_address[1]:
887
528
if not self.server_address[0]:
888
if self.address_family == socket.AF_INET6:
889
any_address = "::" # in6addr_any
890
else:
891
any_address = socket.INADDR_ANY
892
self.server_address = (any_address,
529
in6addr_any = "::"
530
self.server_address = (in6addr_any,
893
531
self.server_address[1])
894
elif not self.server_address[1]:
532
elif self.server_address[1] is None:
895
533
self.server_address = (self.server_address[0],
896
534
0)
897
# if self.settings["interface"]:
898
# self.server_address = (self.server_address[0],
899
# 0, # port
900
# 0, # flowinfo
901
# if_nametoindex
902
# (self.settings
903
# ["interface"]))
904
return super(IPv6_TCPServer, self).server_bind()
905
def server_activate(self):
906
if self.enabled:
907
return super(IPv6_TCPServer, self).server_activate()
908
def enable(self):
909
self.enabled = True
910
def handle_ipc(self, source, condition, file_objects={}):
911
condition_names = {
912
gobject.IO_IN: "IN", # There is data to read.
913
gobject.IO_OUT: "OUT", # Data can be written (without
914
# blocking).
915
gobject.IO_PRI: "PRI", # There is urgent data to read.
916
gobject.IO_ERR: "ERR", # Error condition.
917
gobject.IO_HUP: "HUP" # Hung up (the connection has been
918
# broken, usually for pipes and
919
# sockets).
920
}
921
conditions_string = ' | '.join(name
922
for cond, name in
923
condition_names.iteritems()
924
if cond & condition)
925
logger.debug("Handling IPC: FD = %d, condition = %s", source,
926
conditions_string)
927
928
# Turn the pipe file descriptor into a Python file object
929
if source not in file_objects:
930
file_objects[source] = os.fdopen(source, "r", 1)
931
932
# Read a line from the file object
933
cmdline = file_objects[source].readline()
934
if not cmdline: # Empty line means end of file
935
# close the IPC pipe
936
file_objects[source].close()
937
del file_objects[source]
938
939
# Stop calling this function
940
return False
941
942
logger.debug("IPC command: %r\n" % cmdline)
943
944
# Parse and act on command
945
cmd, args = cmdline.split(None, 1)
946
if cmd == "NOTFOUND":
947
if self.settings["use_dbus"]:
948
# Emit D-Bus signal
949
mandos_dbus_service.ClientNotFound(args)
950
elif cmd == "INVALID":
951
if self.settings["use_dbus"]:
952
for client in self.clients:
953
if client.name == args:
954
# Emit D-Bus signal
955
client.Rejected()
956
break
957
elif cmd == "SENDING":
958
for client in self.clients:
959
if client.name == args:
960
client.checked_ok()
961
if self.settings["use_dbus"]:
962
# Emit D-Bus signal
963
client.ReceivedSecret()
964
break
965
else:
966
logger.error("Unknown IPC command: %r", cmdline)
967
968
# Keep calling this function
969
return True
535
return super(type(self), self).server_bind()
970
536
971
537
972
538
def string_to_delta(interval):
973
539
"""Parse a string and return a datetime.timedelta
974
540
975
541
>>> string_to_delta('7d')
976
542
datetime.timedelta(7)
977
543
>>> string_to_delta('60s')
982
548
datetime.timedelta(1)
983
549
>>> string_to_delta(u'1w')
984
550
datetime.timedelta(7)
985
>>> string_to_delta('5m 30s')
986
datetime.timedelta(0, 330)
987
551
"""
988
timevalue = datetime.timedelta(0)
989
for s in interval.split():
990
try:
991
suffix = unicode(s[-1])
992
value = int(s[:-1])
993
if suffix == u"d":
994
delta = datetime.timedelta(value)
995
elif suffix == u"s":
996
delta = datetime.timedelta(0, value)
997
elif suffix == u"m":
998
delta = datetime.timedelta(0, 0, 0, 0, value)
999
elif suffix == u"h":
1000
delta = datetime.timedelta(0, 0, 0, 0, 0, value)
1001
elif suffix == u"w":
1002
delta = datetime.timedelta(0, 0, 0, 0, 0, 0, value)
1003
else:
1004
raise ValueError
1005
except (ValueError, IndexError):
552
try:
553
suffix=unicode(interval[-1])
554
value=int(interval[:-1])
555
if suffix == u"d":
556
delta = datetime.timedelta(value)
557
elif suffix == u"s":
558
delta = datetime.timedelta(0, value)
559
elif suffix == u"m":
560
delta = datetime.timedelta(0, 0, 0, 0, value)
561
elif suffix == u"h":
562
delta = datetime.timedelta(0, 0, 0, 0, 0, value)
563
elif suffix == u"w":
564
delta = datetime.timedelta(0, 0, 0, 0, 0, 0, value)
565
else:
1006
566
raise ValueError
1007
timevalue += delta
1008
return timevalue
567
except (ValueError, IndexError):
568
raise ValueError
569
return delta
1009
570
1010
571
1011
572
def server_state_changed(state):
1012
573
"""Derived from the Avahi example code"""
1013
574
if state == avahi.SERVER_COLLISION:
1014
logger.error(u"Zeroconf server name collision")
575
logger.warning(u"Server name collision")
1015
576
service.remove()
1016
577
elif state == avahi.SERVER_RUNNING:
1017
578
service.add()
1019
580
1020
581
def entry_group_state_changed(state, error):
1021
582
"""Derived from the Avahi example code"""
1022
logger.debug(u"Avahi state change: %i", state)
583
logger.debug(u"state change: %i", state)
1023
584
1024
585
if state == avahi.ENTRY_GROUP_ESTABLISHED:
1025
logger.debug(u"Zeroconf service established.")
586
logger.debug(u"Service established.")
1026
587
elif state == avahi.ENTRY_GROUP_COLLISION:
1027
logger.warning(u"Zeroconf service name collision.")
588
logger.warning(u"Service name collision.")
1028
589
service.rename()
1029
590
elif state == avahi.ENTRY_GROUP_FAILURE:
1030
logger.critical(u"Avahi: Error in group state changed %s",
591
logger.critical(u"Error in group state changed %s",
1031
592
unicode(error))
1032
raise AvahiGroupError(u"State changed: %s" % unicode(error))
593
raise AvahiGroupError("State changed: %s", str(error))
1033
594
1034
def if_nametoindex(interface):
595
def if_nametoindex(interface, _func=[None]):
1035
596
"""Call the C function if_nametoindex(), or equivalent"""
1036
global if_nametoindex
597
if _func[0] is not None:
598
return _func[0](interface)
1037
599
try:
1038
if_nametoindex = (ctypes.cdll.LoadLibrary
1039
(ctypes.util.find_library("c"))
1040
.if_nametoindex)
600
if "ctypes.util" not in sys.modules:
601
import ctypes.util
602
while True:
603
try:
604
libc = ctypes.cdll.LoadLibrary\
605
(ctypes.util.find_library("c"))
606
_func[0] = libc.if_nametoindex
607
return _func[0](interface)
608
except IOError, e:
609
if e != errno.EINTR:
610
raise
1041
611
except (OSError, AttributeError):
1042
612
if "struct" not in sys.modules:
1043
613
import struct
1044
614
if "fcntl" not in sys.modules:
1045
615
import fcntl
1046
def if_nametoindex(interface):
616
def the_hard_way(interface):
1047
617
"Get an interface index the hard way, i.e. using fcntl()"
1048
618
SIOCGIFINDEX = 0x8933 # From /usr/include/linux/sockios.h
1049
with closing(socket.socket()) as s:
1050
ifreq = fcntl.ioctl(s, SIOCGIFINDEX,
1051
struct.pack("16s16x", interface))
619
s = socket.socket()
620
ifreq = fcntl.ioctl(s, SIOCGIFINDEX,
621
struct.pack("16s16x", interface))
622
s.close()
1052
623
interface_index = struct.unpack("I", ifreq[16:20])[0]
1053
624
return interface_index
1054
return if_nametoindex(interface)
1055
1056
1057
def daemon(nochdir = False, noclose = False):
625
_func[0] = the_hard_way
626
return _func[0](interface)
627
628
629
def daemon(nochdir, noclose):
1058
630
"""See daemon(3). Standard BSD Unix function.
1059
631
This should really exist as os.daemon, but it doesn't (yet)."""
1060
632
if os.fork():
1062
634
os.setsid()
1063
635
if not nochdir:
1064
636
os.chdir("/")
1065
if os.fork():
1066
sys.exit()
1067
637
if not noclose:
1068
638
# Close all standard open file descriptors
1069
639
null = os.open(os.path.devnull, os.O_NOCTTY | os.O_RDWR)
1078
648
1079
649
1080
650
def main():
1081
1082
######################################################################
1083
# Parsing of options, both command line and config file
1084
1085
parser = optparse.OptionParser(version = "%%prog %s" % version)
651
global main_loop_started
652
main_loop_started = False
653
654
parser = OptionParser()
1086
655
parser.add_option("-i", "--interface", type="string",
1087
656
metavar="IF", help="Bind to interface IF")
1088
657
parser.add_option("-a", "--address", type="string",
1089
658
help="Address to listen for requests on")
1090
659
parser.add_option("-p", "--port", type="int",
1091
660
help="Port number to receive requests on")
1092
parser.add_option("--check", action="store_true",
661
parser.add_option("--check", action="store_true", default=False,
1093
662
help="Run self-test")
1094
parser.add_option("--debug", action="store_true",
663
parser.add_option("--debug", action="store_true", default=False,
1095
664
help="Debug mode; run in foreground and log to"
1096
665
" terminal")
1097
666
parser.add_option("--priority", type="string", help="GnuTLS"
1102
671
default="/etc/mandos", metavar="DIR",
1103
672
help="Directory to search for configuration"
1104
673
" files")
1105
parser.add_option("--no-dbus", action="store_false",
1106
dest="use_dbus",
1107
help="Do not provide D-Bus system bus"
1108
" interface")
1109
parser.add_option("--no-ipv6", action="store_false",
1110
dest="use_ipv6", help="Do not use IPv6")
1111
options = parser.parse_args()[0]
674
(options, args) = parser.parse_args()
1112
675
1113
676
if options.check:
1114
677
import doctest
1123
686
"priority":
1124
687
"SECURE256:!CTYPE-X.509:+CTYPE-OPENPGP",
1125
688
"servicename": "Mandos",
1126
"use_dbus": "True",
1127
"use_ipv6": "True",
1128
689
}
1129
690
1130
691
# Parse config file for server-global settings
1131
692
server_config = ConfigParser.SafeConfigParser(server_defaults)
1132
693
del server_defaults
1133
server_config.read(os.path.join(options.configdir, "mandos.conf"))
694
server_config.read(os.path.join(options.configdir, "server.conf"))
695
server_section = "server"
1134
696
# Convert the SafeConfigParser object to a dict
1135
server_settings = server_config.defaults()
1136
# Use the appropriate methods on the non-string config options
1137
server_settings["debug"] = server_config.getboolean("DEFAULT",
1138
"debug")
1139
server_settings["use_dbus"] = server_config.getboolean("DEFAULT",
1140
"use_dbus")
1141
server_settings["use_ipv6"] = server_config.getboolean("DEFAULT",
1142
"use_ipv6")
1143
if server_settings["port"]:
1144
server_settings["port"] = server_config.getint("DEFAULT",
1145
"port")
697
server_settings = dict(server_config.items(server_section))
698
# Use getboolean on the boolean config option
699
server_settings["debug"] = server_config.getboolean\
700
(server_section, "debug")
1146
701
del server_config
1147
702
1148
703
# Override the settings from the config file with command line
1149
704
# options, if set.
1150
705
for option in ("interface", "address", "port", "debug",
1151
"priority", "servicename", "configdir",
1152
"use_dbus", "use_ipv6"):
706
"priority", "servicename", "configdir"):
1153
707
value = getattr(options, option)
1154
708
if value is not None:
1155
709
server_settings[option] = value
1156
710
del options
1157
711
# Now we have our good server settings in "server_settings"
1158
712
1159
##################################################################
1160
1161
# For convenience
1162
debug = server_settings["debug"]
1163
use_dbus = server_settings["use_dbus"]
1164
use_ipv6 = server_settings["use_ipv6"]
1165
1166
if not debug:
1167
syslogger.setLevel(logging.WARNING)
1168
console.setLevel(logging.WARNING)
1169
1170
if server_settings["servicename"] != "Mandos":
1171
syslogger.setFormatter(logging.Formatter
1172
('Mandos (%s) [%%(process)d]:'
1173
' %%(levelname)s: %%(message)s'
1174
% server_settings["servicename"]))
1175
1176
713
# Parse config file with clients
1177
714
client_defaults = { "timeout": "1h",
1178
715
"interval": "5m",
1179
"checker": "fping -q -- %%(host)s",
1180
"host": "",
716
"checker": "fping -q -- %%(fqdn)s",
1181
717
}
1182
718
client_config = ConfigParser.SafeConfigParser(client_defaults)
1183
719
client_config.read(os.path.join(server_settings["configdir"],
1184
720
"clients.conf"))
1185
1186
global mandos_dbus_service
1187
mandos_dbus_service = None
1188
1189
clients = Set()
1190
tcp_server = IPv6_TCPServer((server_settings["address"],
1191
server_settings["port"]),
1192
TCP_handler,
1193
settings=server_settings,
1194
clients=clients, use_ipv6=use_ipv6)
1195
pidfilename = "/var/run/mandos.pid"
1196
try:
1197
pidfile = open(pidfilename, "w")
1198
except IOError:
1199
logger.error("Could not open file %r", pidfilename)
1200
1201
try:
1202
uid = pwd.getpwnam("_mandos").pw_uid
1203
gid = pwd.getpwnam("_mandos").pw_gid
1204
except KeyError:
1205
try:
1206
uid = pwd.getpwnam("mandos").pw_uid
1207
gid = pwd.getpwnam("mandos").pw_gid
1208
except KeyError:
1209
try:
1210
uid = pwd.getpwnam("nobody").pw_uid
1211
gid = pwd.getpwnam("nogroup").pw_gid
1212
except KeyError:
1213
uid = 65534
1214
gid = 65534
1215
try:
1216
os.setgid(gid)
1217
os.setuid(uid)
1218
except OSError, error:
1219
if error[0] != errno.EPERM:
1220
raise error
1221
1222
# Enable all possible GnuTLS debugging
1223
if debug:
1224
# "Use a log level over 10 to enable all debugging options."
1225
# - GnuTLS manual
1226
gnutls.library.functions.gnutls_global_set_log_level(11)
1227
1228
@gnutls.library.types.gnutls_log_func
1229
def debug_gnutls(level, string):
1230
logger.debug("GnuTLS: %s", string[:-1])
1231
1232
(gnutls.library.functions
1233
.gnutls_global_set_log_function(debug_gnutls))
1234
721
1235
722
global service
1236
protocol = avahi.PROTO_INET6 if use_ipv6 else avahi.PROTO_INET
1237
723
service = AvahiService(name = server_settings["servicename"],
1238
servicetype = "_mandos._tcp",
1239
protocol = protocol)
724
type = "_mandos._tcp", );
1240
725
if server_settings["interface"]:
1241
service.interface = (if_nametoindex
1242
(server_settings["interface"]))
726
service.interface = if_nametoindex(server_settings["interface"])
1243
727
1244
728
global main_loop
1245
729
global bus
1248
732
DBusGMainLoop(set_as_default=True )
1249
733
main_loop = gobject.MainLoop()
1250
734
bus = dbus.SystemBus()
1251
server = dbus.Interface(bus.get_object(avahi.DBUS_NAME,
1252
avahi.DBUS_PATH_SERVER),
1253
avahi.DBUS_INTERFACE_SERVER)
735
server = dbus.Interface(
736
bus.get_object( avahi.DBUS_NAME, avahi.DBUS_PATH_SERVER ),
737
avahi.DBUS_INTERFACE_SERVER )
1254
738
# End of Avahi example code
1255
if use_dbus:
1256
bus_name = dbus.service.BusName(u"se.bsnet.fukt.Mandos", bus)
1257
739
1258
client_class = Client
1259
if use_dbus:
1260
client_class = ClientDBus
1261
clients.update(Set(
1262
client_class(name = section,
1263
config= dict(client_config.items(section)))
1264
for section in client_config.sections()))
1265
if not clients:
1266
logger.warning(u"No clients defined")
740
debug = server_settings["debug"]
1267
741
1268
742
if debug:
1269
# Redirect stdin so all checkers get /dev/null
1270
null = os.open(os.path.devnull, os.O_NOCTTY | os.O_RDWR)
1271
os.dup2(null, sys.stdin.fileno())
1272
if null > 2:
1273
os.close(null)
1274
else:
1275
# No console logging
1276
logger.removeHandler(console)
1277
# Close all input and output, do double fork, etc.
1278
daemon()
1279
1280
try:
1281
with closing(pidfile):
1282
pid = os.getpid()
1283
pidfile.write(str(pid) + "\n")
1284
del pidfile
1285
except IOError:
1286
logger.error(u"Could not write to file %r with PID %d",
1287
pidfilename, pid)
1288
except NameError:
1289
# "pidfile" was never created
1290
pass
1291
del pidfilename
743
console = logging.StreamHandler()
744
# console.setLevel(logging.DEBUG)
745
console.setFormatter(logging.Formatter\
746
('%(levelname)s: %(message)s'))
747
logger.addHandler(console)
748
del console
749
750
clients = Set()
751
def remove_from_clients(client):
752
clients.remove(client)
753
if not clients:
754
logger.debug(u"No clients left, exiting")
755
sys.exit()
756
757
clients.update(Set(Client(name=section,
758
stop_hook = remove_from_clients,
759
**(dict(client_config\
760
.items(section))))
761
for section in client_config.sections()))
762
763
if not debug:
764
daemon(False, False)
1292
765
1293
766
def cleanup():
1294
767
"Cleanup function; run on exit"
1301
774
1302
775
while clients:
1303
776
client = clients.pop()
1304
client.disable_hook = None
1305
client.disable()
777
client.stop_hook = None
778
client.stop()
1306
779
1307
780
atexit.register(cleanup)
1308
781
1311
784
signal.signal(signal.SIGHUP, lambda signum, frame: sys.exit())
1312
785
signal.signal(signal.SIGTERM, lambda signum, frame: sys.exit())
1313
786
1314
if use_dbus:
1315
class MandosDBusService(dbus.service.Object):
1316
"""A D-Bus proxy object"""
1317
def __init__(self):
1318
dbus.service.Object.__init__(self, bus, "/")
1319
_interface = u"se.bsnet.fukt.Mandos"
1320
1321
@dbus.service.signal(_interface, signature="oa{sv}")
1322
def ClientAdded(self, objpath, properties):
1323
"D-Bus signal"
1324
pass
1325
1326
@dbus.service.signal(_interface, signature="s")
1327
def ClientNotFound(self, fingerprint):
1328
"D-Bus signal"
1329
pass
1330
1331
@dbus.service.signal(_interface, signature="os")
1332
def ClientRemoved(self, objpath, name):
1333
"D-Bus signal"
1334
pass
1335
1336
@dbus.service.method(_interface, out_signature="ao")
1337
def GetAllClients(self):
1338
"D-Bus method"
1339
return dbus.Array(c.dbus_object_path for c in clients)
1340
1341
@dbus.service.method(_interface, out_signature="a{oa{sv}}")
1342
def GetAllClientsWithProperties(self):
1343
"D-Bus method"
1344
return dbus.Dictionary(
1345
((c.dbus_object_path, c.GetAllProperties())
1346
for c in clients),
1347
signature="oa{sv}")
1348
1349
@dbus.service.method(_interface, in_signature="o")
1350
def RemoveClient(self, object_path):
1351
"D-Bus method"
1352
for c in clients:
1353
if c.dbus_object_path == object_path:
1354
clients.remove(c)
1355
c.remove_from_connection()
1356
# Don't signal anything except ClientRemoved
1357
c.disable(signal=False)
1358
# Emit D-Bus signal
1359
self.ClientRemoved(object_path, c.name)
1360
return
1361
raise KeyError
1362
1363
del _interface
1364
1365
mandos_dbus_service = MandosDBusService()
1366
1367
787
for client in clients:
1368
if use_dbus:
1369
# Emit D-Bus signal
1370
mandos_dbus_service.ClientAdded(client.dbus_object_path,
1371
client.GetAllProperties())
1372
client.enable()
1373
1374
tcp_server.enable()
1375
tcp_server.server_activate()
1376
788
client.start()
789
790
tcp_server = IPv6_TCPServer((server_settings["address"],
791
server_settings["port"]),
792
tcp_handler,
793
settings=server_settings,
794
clients=clients)
1377
795
# Find out what port we got
1378
796
service.port = tcp_server.socket.getsockname()[1]
1379
if use_ipv6:
1380
logger.info(u"Now listening on address %r, port %d,"
1381
" flowinfo %d, scope_id %d"
1382
% tcp_server.socket.getsockname())
1383
else: # IPv4
1384
logger.info(u"Now listening on address %r, port %d"
1385
% tcp_server.socket.getsockname())
797
logger.debug(u"Now listening on address %r, port %d, flowinfo %d,"
798
u" scope_id %d" % tcp_server.socket.getsockname())
1386
799
1387
800
#service.interface = tcp_server.socket.getsockname()[3]
1388
801
1398
811
1399
812
gobject.io_add_watch(tcp_server.fileno(), gobject.IO_IN,
1400
813
lambda *args, **kwargs:
1401
(tcp_server.handle_request
1402
(*args[2:], **kwargs) or True))
814
tcp_server.handle_request\
815
(*args[2:], **kwargs) or True)
1403
816
1404
logger.debug(u"Starting main loop")
817
logger.debug("Starting main loop")
818
main_loop_started = True
1405
819
main_loop.run()
1406
820
except AvahiError, error:
1407
logger.critical(u"AvahiError: %s", error)
821
logger.critical(u"AvahiError: %s" + unicode(error))
1408
822
sys.exit(1)
1409
823
except KeyboardInterrupt:
1410
824
if debug:
1411
print >> sys.stderr
1412
logger.debug("Server received KeyboardInterrupt")
1413
logger.debug("Server exiting")
825
print
1414
826
1415
827
if __name__ == '__main__':
1416
828
main()
Loggerhead is a web-based interface for Breezy
Version: 2.0.2.dev0