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# -*- mode: python; coding: utf-8 -*-
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# Mandos server - give out binary blobs to connecting clients.
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# This program is partly derived from an example program for an Avahi
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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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# Copyright © 2008 Teddy Hogeborn & Björn Påhlsson
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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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# the Free Software Foundation, either version 3 of the License, or
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# (at your option) any later version.
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# This program is distributed in the hope that it will be useful,
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# but WITHOUT ANY WARRANTY; without even the implied warranty of
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# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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# GNU General Public License for more details.
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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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# Contact the authors at <mandos@fukt.bsnet.se>.
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from __future__ import division
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from optparse import OptionParser
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import gnutls.crypto
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import gnutls.connection
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import gnutls.errors
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import gnutls.library.functions
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import gnutls.library.constants
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import gnutls.library.types
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import ConfigParser
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import logging.handlers
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from dbus.mainloop.glib import DBusGMainLoop
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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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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: %(levelname)s:'
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logger.addHandler(console)
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class AvahiError(Exception):
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def __init__(self, value):
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super(AvahiError, self).__init__()
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return repr(self.value)
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class AvahiServiceError(AvahiError):
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class AvahiGroupError(AvahiError):
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class AvahiService(object):
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"""An Avahi (Zeroconf) service.
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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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def __init__(self, interface = avahi.IF_UNSPEC, name = None,
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servicetype = 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.type = servicetype
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self.rename_count = 0
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self.max_renames = max_renames
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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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raise AvahiServiceError("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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syslogger.setFormatter(logging.Formatter\
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('Mandos (%s): %%(levelname)s:'
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' %%(message)s' % self.name))
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self.rename_count += 1
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"""Derived from the Avahi example code"""
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if group is not None:
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"""Derived from the Avahi example code"""
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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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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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service.name, service.type)
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self.interface, # interface
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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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dbus.UInt16(self.port),
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avahi.string_array_to_txt_array(self.TXT))
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# From the Avahi example code:
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group = None # our entry group
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# End of Avahi example code
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class Client(object):
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def __init__(self, name=None, options=None, dn=None,
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password=None, passfile=None, fqdn=None,
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timeout=None, interval=-1):
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"""A representation of a client host served by this server.
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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(); 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
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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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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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_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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def _set_timeout(self, timeout):
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"Setter function for 'timeout' attribute"
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self._timeout = timeout
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self._timeout_milliseconds = ((self.timeout.days
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* 24 * 60 * 60 * 1000)
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+ (self.timeout.seconds * 1000)
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+ (self.timeout.microseconds
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timeout = property(lambda self: self._timeout,
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def _set_interval(self, interval):
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"Setter function for 'interval' attribute"
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self._interval = interval
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self._interval_milliseconds = ((self.interval.days
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* 24 * 60 * 60 * 1000)
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+ (self.interval.seconds
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+ (self.interval.microseconds
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interval = property(lambda self: self._interval,
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def __init__(self, name = None, stop_hook=None, config=None):
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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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self.password = password
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self.password = open(passfile).readall()
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logger.debug(u"Creating client %r", self.name)
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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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self.fingerprint = config["fingerprint"].upper()\
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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")
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elif "secfile" in config:
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secfile = open(os.path.expanduser(os.path.expandvars
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(config["secfile"])))
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self.secret = secfile.read()
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print "No Password or Passfile in client config file"
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# raise RuntimeError XXX
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self.password = "gazonk"
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self.fqdn = fqdn # string
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raise TypeError(u"No secret or secfile for client %s"
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self.host = config.get("host", "")
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self.created = datetime.datetime.now()
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self.last_seen = None # datetime.datetime()
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timeout = options.timeout
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self.timeout = timeout # datetime.timedelta()
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interval = options.interval
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self.interval = interval # datetime.timedelta()
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self.next_check = datetime.datetime.now() # datetime.datetime()
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self.checker = None # or a subprocess.Popen()
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def check_action(self, now=None):
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"""The checker said something and might have completed.
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Check if is has, and take appropriate actions."""
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if self.checker.poll() is None:
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# False alarm, no result yet
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now = datetime.datetime.now()
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if self.checker.returncode == 0:
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while self.next_check <= now:
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self.next_check += self.interval
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handle_request = check_action
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self.last_checked_ok = None
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self.timeout = string_to_delta(config["timeout"])
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self.interval = string_to_delta(config["interval"])
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self.stop_hook = stop_hook
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self.checker_initiator_tag = None
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self.stop_initiator_tag = None
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self.checker_callback_tag = None
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self.check_command = config["checker"]
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"""Start this client's checker and timeout hooks"""
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# Schedule a new checker to be started an 'interval' from now,
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# and every interval from then on.
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self.checker_initiator_tag = gobject.timeout_add\
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(self._interval_milliseconds,
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# Also start a new checker *right now*.
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# Schedule a stop() when 'timeout' has passed
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self.stop_initiator_tag = gobject.timeout_add\
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(self._timeout_milliseconds,
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The possibility that a client might be restarted is left open,
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but not currently used."""
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# If this client doesn't have a secret, it is already stopped.
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if hasattr(self, "secret") and self.secret:
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logger.info(u"Stopping client %s", self.name)
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if getattr(self, "stop_initiator_tag", False):
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gobject.source_remove(self.stop_initiator_tag)
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self.stop_initiator_tag = None
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if getattr(self, "checker_initiator_tag", False):
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gobject.source_remove(self.checker_initiator_tag)
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self.checker_initiator_tag = None
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# Do not run this again if called by a gobject.timeout_add
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self.stop_hook = None
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def checker_callback(self, pid, condition):
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"""The checker has completed, so take appropriate actions."""
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now = datetime.datetime.now()
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self.checker_callback_tag = None
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if os.WIFEXITED(condition) \
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and (os.WEXITSTATUS(condition) == 0):
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logger.info(u"Checker for %(name)s succeeded",
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self.last_checked_ok = now
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gobject.source_remove(self.stop_initiator_tag)
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self.stop_initiator_tag = gobject.timeout_add\
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(self._timeout_milliseconds,
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elif not os.WIFEXITED(condition):
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logger.warning(u"Checker for %(name)s crashed?",
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logger.info(u"Checker for %(name)s failed",
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def start_checker(self):
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self.checker = subprocess.Popen("sleep 1; fping -q -- %s"
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% re.escape(self.fqdn),
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stdout=subprocess.PIPE,
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except subprocess.OSError, e:
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print "Failed to start subprocess:", e
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"""Start a new checker subprocess if one is not running.
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If a checker already exists, leave it running and do
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# The reason for not killing a running checker is that if we
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# did that, then if a checker (for some reason) started
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# running slowly and taking more than 'interval' time, the
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# client would inevitably timeout, since no checker would get
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# a chance to run to completion. If we instead leave running
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# checkers alone, the checker would have to take more time
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# than 'timeout' for the client to be declared invalid, which
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# is as it should be.
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if self.checker is None:
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# In case check_command has exactly one % operator
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command = self.check_command % self.host
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# Escape attributes for the shell
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escaped_attrs = dict((key, re.escape(str(val)))
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vars(self).iteritems())
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command = self.check_command % escaped_attrs
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except TypeError, error:
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logger.error(u'Could not format string "%s":'
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u' %s', self.check_command, error)
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return True # Try again later
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logger.info(u"Starting checker %r for %s",
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# We don't need to redirect stdout and stderr, since
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# in normal mode, that is already done by daemon(),
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# and in debug mode we don't want to. (Stdin is
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# always replaced by /dev/null.)
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self.checker = subprocess.Popen(command,
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self.checker_callback_tag = gobject.child_watch_add\
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self.checker_callback)
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except OSError, error:
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logger.error(u"Failed to start subprocess: %s",
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# Re-run this periodically if run by gobject.timeout_add
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def stop_checker(self):
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if self.checker is None:
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"""Force the checker process, if any, to stop."""
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if self.checker_callback_tag:
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gobject.source_remove(self.checker_callback_tag)
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self.checker_callback_tag = None
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if getattr(self, "checker", None) is None:
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os.kill(self.checker.pid, signal.SIGTERM)
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if self.checker.poll() is None:
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os.kill(self.checker.pid, signal.SIGKILL)
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logger.debug(u"Stopping checker for %(name)s", vars(self))
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os.kill(self.checker.pid, signal.SIGTERM)
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#if self.checker.poll() is None:
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# os.kill(self.checker.pid, signal.SIGKILL)
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except OSError, error:
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if error.errno != errno.ESRCH: # No such process
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self.checker = None
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__del__ = stop_checker
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if self.checker is None:
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return self.checker.stdout.fileno()
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"""The time when something must be done about this client"""
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return min(self.last_seen + self.timeout, self.next_check)
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def still_valid(self, now=None):
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"""Has this client's timeout not passed?"""
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now = datetime.datetime.now()
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return now < (self.last_seen + timeout)
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def it_is_time_to_check(self, now=None):
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now = datetime.datetime.now()
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return self.next_check <= now
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class server_metaclass(type):
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"Common behavior for the UDP and TCP server classes"
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def __new__(cls, name, bases, attrs):
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attrs["address_family"] = socket.AF_INET6
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attrs["allow_reuse_address"] = True
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def server_bind(self):
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if self.options.interface:
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if not hasattr(socket, "SO_BINDTODEVICE"):
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# From /usr/include/asm-i486/socket.h
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socket.SO_BINDTODEVICE = 25
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self.socket.setsockopt(socket.SOL_SOCKET,
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socket.SO_BINDTODEVICE,
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self.options.interface)
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except socket.error, error:
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if error[0] == errno.EPERM:
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print "Warning: No permission to bind to interface", \
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self.options.interface
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return super(type(self), self).server_bind()
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attrs["server_bind"] = server_bind
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def init(self, *args, **kwargs):
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if "options" in kwargs:
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self.options = kwargs["options"]
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del kwargs["options"]
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if "clients" in kwargs:
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self.clients = kwargs["clients"]
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del kwargs["clients"]
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if "credentials" in kwargs:
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self.credentials = kwargs["credentials"]
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del kwargs["credentials"]
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return super(type(self), self).__init__(*args, **kwargs)
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attrs["__init__"] = init
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return type.__new__(cls, name, bases, attrs)
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class udp_handler(SocketServer.DatagramRequestHandler, object):
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self.wfile.write("Polo")
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print "UDP request answered"
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class IPv6_UDPServer(SocketServer.UDPServer, object):
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__metaclass__ = server_metaclass
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def verify_request(self, request, client_address):
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print "UDP request came"
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return request[0] == "Marco"
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class tcp_handler(SocketServer.BaseRequestHandler, object):
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print "TCP request came"
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print "Request:", self.request
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print "Client Address:", self.client_address
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print "Server:", self.server
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session = gnutls.connection.ServerSession(self.request,
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self.server.credentials)
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if session.peer_certificate:
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print "DN:", session.peer_certificate.subject
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session.verify_peer()
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except gnutls.errors.CertificateError, error:
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print "Verify failed", error
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session.send(dict((client.dn, client.password)
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for client in self.server.clients)
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[session.peer_certificate.subject])
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session.send("gazonk")
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def still_valid(self):
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"""Has the timeout not yet passed for this client?"""
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now = datetime.datetime.now()
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if self.last_checked_ok is None:
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return now < (self.created + self.timeout)
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return now < (self.last_checked_ok + self.timeout)
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def peer_certificate(session):
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"Return the peer's OpenPGP certificate as a bytestring"
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# If not an OpenPGP certificate...
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if gnutls.library.functions.gnutls_certificate_type_get\
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(session._c_object) \
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!= gnutls.library.constants.GNUTLS_CRT_OPENPGP:
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# ...do the normal thing
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return session.peer_certificate
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list_size = ctypes.c_uint()
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cert_list = gnutls.library.functions.gnutls_certificate_get_peers\
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(session._c_object, ctypes.byref(list_size))
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if list_size.value == 0:
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return ctypes.string_at(cert.data, cert.size)
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def fingerprint(openpgp):
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"Convert an OpenPGP bytestring to a hexdigit fingerprint string"
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# New GnuTLS "datum" with the OpenPGP public key
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datum = gnutls.library.types.gnutls_datum_t\
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(ctypes.cast(ctypes.c_char_p(openpgp),
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ctypes.POINTER(ctypes.c_ubyte)),
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ctypes.c_uint(len(openpgp)))
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# New empty GnuTLS certificate
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crt = gnutls.library.types.gnutls_openpgp_crt_t()
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gnutls.library.functions.gnutls_openpgp_crt_init\
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# Import the OpenPGP public key into the certificate
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gnutls.library.functions.gnutls_openpgp_crt_import\
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(crt, ctypes.byref(datum),
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gnutls.library.constants.GNUTLS_OPENPGP_FMT_RAW)
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# Verify the self signature in the key
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crtverify = ctypes.c_uint()
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gnutls.library.functions.gnutls_openpgp_crt_verify_self\
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(crt, 0, ctypes.byref(crtverify))
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if crtverify.value != 0:
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gnutls.library.functions.gnutls_openpgp_crt_deinit(crt)
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raise gnutls.errors.CertificateSecurityError("Verify failed")
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# New buffer for the fingerprint
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buf = ctypes.create_string_buffer(20)
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buf_len = ctypes.c_size_t()
431
# Get the fingerprint from the certificate into the buffer
432
gnutls.library.functions.gnutls_openpgp_crt_get_fingerprint\
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(crt, ctypes.byref(buf), ctypes.byref(buf_len))
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# Deinit the certificate
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gnutls.library.functions.gnutls_openpgp_crt_deinit(crt)
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# Convert the buffer to a Python bytestring
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fpr = ctypes.string_at(buf, buf_len.value)
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# Convert the bytestring to hexadecimal notation
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hex_fpr = u''.join(u"%02X" % ord(char) for char in fpr)
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class TCP_handler(SocketServer.BaseRequestHandler, object):
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"""A TCP request handler class.
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Instantiated by IPv6_TCPServer for each request to handle it.
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Note: This will run in its own forked process."""
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logger.info(u"TCP connection from: %s",
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unicode(self.client_address))
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session = gnutls.connection.ClientSession\
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(self.request, gnutls.connection.X509Credentials())
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line = self.request.makefile().readline()
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logger.debug(u"Protocol version: %r", line)
457
if int(line.strip().split()[0]) > 1:
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except (ValueError, IndexError, RuntimeError), error:
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logger.error(u"Unknown protocol version: %s", error)
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# Note: gnutls.connection.X509Credentials is really a generic
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# GnuTLS certificate credentials object so long as no X.509
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# keys are added to it. Therefore, we can use it here despite
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# using OpenPGP certificates.
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#priority = ':'.join(("NONE", "+VERS-TLS1.1", "+AES-256-CBC",
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# "+SHA1", "+COMP-NULL", "+CTYPE-OPENPGP",
471
priority = "NORMAL" # Fallback default, since this
473
if self.server.settings["priority"]:
474
priority = self.server.settings["priority"]
475
gnutls.library.functions.gnutls_priority_set_direct\
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(session._c_object, priority, None)
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except gnutls.errors.GNUTLSError, error:
481
logger.warning(u"Handshake failed: %s", error)
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# Do not run session.bye() here: the session is not
483
# established. Just abandon the request.
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fpr = fingerprint(peer_certificate(session))
487
except (TypeError, gnutls.errors.GNUTLSError), error:
488
logger.warning(u"Bad certificate: %s", error)
491
logger.debug(u"Fingerprint: %s", fpr)
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for c in self.server.clients:
494
if c.fingerprint == fpr:
498
logger.warning(u"Client not found for fingerprint: %s",
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# Have to check if client.still_valid(), since it is possible
503
# that the client timed out while establishing the GnuTLS
505
if not client.still_valid():
506
logger.warning(u"Client %(name)s is invalid",
511
while sent_size < len(client.secret):
512
sent = session.send(client.secret[sent_size:])
513
logger.debug(u"Sent: %d, remaining: %d",
514
sent, len(client.secret)
515
- (sent_size + sent))
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520
class IPv6_TCPServer(SocketServer.ForkingTCPServer, object):
171
__metaclass__ = server_metaclass
172
request_queue_size = 1024
521
"""IPv6 TCP server. Accepts 'None' as address and/or port.
523
settings: Server settings
524
clients: Set() of Client objects
525
enabled: Boolean; whether this server is activated yet
527
address_family = socket.AF_INET6
528
def __init__(self, *args, **kwargs):
529
if "settings" in kwargs:
530
self.settings = kwargs["settings"]
531
del kwargs["settings"]
532
if "clients" in kwargs:
533
self.clients = kwargs["clients"]
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del kwargs["clients"]
536
super(IPv6_TCPServer, self).__init__(*args, **kwargs)
537
def server_bind(self):
538
"""This overrides the normal server_bind() function
539
to bind to an interface if one was specified, and also NOT to
540
bind to an address or port if they were not specified."""
541
if self.settings["interface"]:
542
# 25 is from /usr/include/asm-i486/socket.h
543
SO_BINDTODEVICE = getattr(socket, "SO_BINDTODEVICE", 25)
545
self.socket.setsockopt(socket.SOL_SOCKET,
547
self.settings["interface"])
548
except socket.error, error:
549
if error[0] == errno.EPERM:
550
logger.error(u"No permission to"
551
u" bind to interface %s",
552
self.settings["interface"])
555
# Only bind(2) the socket if we really need to.
556
if self.server_address[0] or self.server_address[1]:
557
if not self.server_address[0]:
559
self.server_address = (in6addr_any,
560
self.server_address[1])
561
elif not self.server_address[1]:
562
self.server_address = (self.server_address[0],
564
# if self.settings["interface"]:
565
# self.server_address = (self.server_address[0],
571
return super(IPv6_TCPServer, self).server_bind()
572
def server_activate(self):
574
return super(IPv6_TCPServer, self).server_activate()
177
579
def string_to_delta(interval):
178
580
"""Parse a string and return a datetime.timedelta
187
589
datetime.timedelta(1)
188
590
>>> string_to_delta(u'1w')
189
591
datetime.timedelta(7)
592
>>> string_to_delta('5m 30s')
593
datetime.timedelta(0, 330)
192
suffix=unicode(interval[-1])
193
value=int(interval[:-1])
195
delta = datetime.timedelta(value)
197
delta = datetime.timedelta(0, value)
199
delta = datetime.timedelta(0, 0, 0, 0, value)
201
delta = datetime.timedelta(0, 0, 0, 0, 0, value)
203
delta = datetime.timedelta(0, 0, 0, 0, 0, 0, value)
595
timevalue = datetime.timedelta(0)
596
for s in interval.split():
598
suffix = unicode(s[-1])
601
delta = datetime.timedelta(value)
603
delta = datetime.timedelta(0, value)
605
delta = datetime.timedelta(0, 0, 0, 0, value)
607
delta = datetime.timedelta(0, 0, 0, 0, 0, value)
609
delta = datetime.timedelta(0, 0, 0, 0, 0, 0, value)
612
except (ValueError, IndexError):
206
except (ValueError, IndexError):
618
def server_state_changed(state):
619
"""Derived from the Avahi example code"""
620
if state == avahi.SERVER_COLLISION:
621
logger.error(u"Zeroconf server name collision")
623
elif state == avahi.SERVER_RUNNING:
627
def entry_group_state_changed(state, error):
628
"""Derived from the Avahi example code"""
629
logger.debug(u"Avahi state change: %i", state)
631
if state == avahi.ENTRY_GROUP_ESTABLISHED:
632
logger.debug(u"Zeroconf service established.")
633
elif state == avahi.ENTRY_GROUP_COLLISION:
634
logger.warning(u"Zeroconf service name collision.")
636
elif state == avahi.ENTRY_GROUP_FAILURE:
637
logger.critical(u"Avahi: Error in group state changed %s",
639
raise AvahiGroupError("State changed: %s", str(error))
641
def if_nametoindex(interface):
642
"""Call the C function if_nametoindex(), or equivalent"""
643
global if_nametoindex
645
if_nametoindex = ctypes.cdll.LoadLibrary\
646
(ctypes.util.find_library("c")).if_nametoindex
647
except (OSError, AttributeError):
648
if "struct" not in sys.modules:
650
if "fcntl" not in sys.modules:
652
def if_nametoindex(interface):
653
"Get an interface index the hard way, i.e. using fcntl()"
654
SIOCGIFINDEX = 0x8933 # From /usr/include/linux/sockios.h
656
ifreq = fcntl.ioctl(s, SIOCGIFINDEX,
657
struct.pack("16s16x", interface))
659
interface_index = struct.unpack("I", ifreq[16:20])[0]
660
return interface_index
661
return if_nametoindex(interface)
664
def daemon(nochdir = False, noclose = False):
665
"""See daemon(3). Standard BSD Unix function.
666
This should really exist as os.daemon, but it doesn't (yet)."""
675
# Close all standard open file descriptors
676
null = os.open(os.path.devnull, os.O_NOCTTY | os.O_RDWR)
677
if not stat.S_ISCHR(os.fstat(null).st_mode):
678
raise OSError(errno.ENODEV,
679
"/dev/null not a character device")
680
os.dup2(null, sys.stdin.fileno())
681
os.dup2(null, sys.stdout.fileno())
682
os.dup2(null, sys.stderr.fileno())
212
parser = OptionParser()
688
parser = OptionParser(version = "%%prog %s" % version)
213
689
parser.add_option("-i", "--interface", type="string",
214
default="eth0", metavar="IF",
215
help="Interface to bind to")
216
parser.add_option("--cert", type="string", default="cert.pem",
218
help="Public key certificate to use")
219
parser.add_option("--key", type="string", default="key.pem",
221
help="Private key to use")
222
parser.add_option("--ca", type="string", default="ca.pem",
224
help="Certificate Authority certificate to use")
225
parser.add_option("--crl", type="string", default="crl.pem",
227
help="Certificate Revokation List to use")
228
parser.add_option("-p", "--port", type="int", default=49001,
690
metavar="IF", help="Bind to interface IF")
691
parser.add_option("-a", "--address", type="string",
692
help="Address to listen for requests on")
693
parser.add_option("-p", "--port", type="int",
229
694
help="Port number to receive requests on")
230
parser.add_option("--dh", type="int", metavar="BITS",
231
help="DH group to use")
232
parser.add_option("-t", "--timeout", type="string", # Parsed later
234
help="Amount of downtime allowed for clients")
235
parser.add_option("--interval", type="string", # Parsed later
237
help="How often to check that a client is up")
238
695
parser.add_option("--check", action="store_true", default=False,
239
696
help="Run self-test")
240
(options, args) = parser.parse_args()
697
parser.add_option("--debug", action="store_true",
698
help="Debug mode; run in foreground and log to"
700
parser.add_option("--priority", type="string", help="GnuTLS"
701
" priority string (see GnuTLS documentation)")
702
parser.add_option("--servicename", type="string", metavar="NAME",
703
help="Zeroconf service name")
704
parser.add_option("--configdir", type="string",
705
default="/etc/mandos", metavar="DIR",
706
help="Directory to search for configuration"
708
options = parser.parse_args()[0]
242
710
if options.check:
244
712
doctest.testmod()
247
# Parse the time arguments
249
options.timeout = string_to_delta(options.timeout)
251
parser.error("option --timeout: Unparseable time")
254
options.interval = string_to_delta(options.interval)
256
parser.error("option --interval: Unparseable time")
258
cert = gnutls.crypto.X509Certificate(open(options.cert).read())
259
key = gnutls.crypto.X509PrivateKey(open(options.key).read())
260
ca = gnutls.crypto.X509Certificate(open(options.ca).read())
261
crl = gnutls.crypto.X509CRL(open(options.crl).read())
262
cred = gnutls.connection.X509Credentials(cert, key, [ca], [crl])
266
client_config_object = ConfigParser.SafeConfigParser(defaults)
267
client_config_object.read("mandos-clients.conf")
268
clients = [Client(name=section, options=options,
269
**(dict(client_config_object.items(section))))
270
for section in client_config_object.sections()]
272
udp_server = IPv6_UDPServer((in6addr_any, options.port),
276
tcp_server = IPv6_TCPServer((in6addr_any, options.port),
284
input, out, err = select.select((udp_server,
291
except KeyboardInterrupt:
715
# Default values for config file for server-global settings
716
server_defaults = { "interface": "",
721
"SECURE256:!CTYPE-X.509:+CTYPE-OPENPGP",
722
"servicename": "Mandos",
725
# Parse config file for server-global settings
726
server_config = ConfigParser.SafeConfigParser(server_defaults)
728
server_config.read(os.path.join(options.configdir, "mandos.conf"))
729
# Convert the SafeConfigParser object to a dict
730
server_settings = server_config.defaults()
731
# Use getboolean on the boolean config option
732
server_settings["debug"] = server_config.getboolean\
736
# Override the settings from the config file with command line
738
for option in ("interface", "address", "port", "debug",
739
"priority", "servicename", "configdir"):
740
value = getattr(options, option)
741
if value is not None:
742
server_settings[option] = value
744
# Now we have our good server settings in "server_settings"
746
debug = server_settings["debug"]
749
syslogger.setLevel(logging.WARNING)
750
console.setLevel(logging.WARNING)
752
if server_settings["servicename"] != "Mandos":
753
syslogger.setFormatter(logging.Formatter\
754
('Mandos (%s): %%(levelname)s:'
756
% server_settings["servicename"]))
758
# Parse config file with clients
759
client_defaults = { "timeout": "1h",
761
"checker": "fping -q -- %(host)s",
764
client_config = ConfigParser.SafeConfigParser(client_defaults)
765
client_config.read(os.path.join(server_settings["configdir"],
769
tcp_server = IPv6_TCPServer((server_settings["address"],
770
server_settings["port"]),
772
settings=server_settings,
774
pidfilename = "/var/run/mandos.pid"
776
pidfile = open(pidfilename, "w")
777
except IOError, error:
778
logger.error("Could not open file %r", pidfilename)
783
uid = pwd.getpwnam("mandos").pw_uid
786
uid = pwd.getpwnam("nobody").pw_uid
790
gid = pwd.getpwnam("mandos").pw_gid
793
gid = pwd.getpwnam("nogroup").pw_gid
799
except OSError, error:
800
if error[0] != errno.EPERM:
804
service = AvahiService(name = server_settings["servicename"],
805
servicetype = "_mandos._tcp", )
806
if server_settings["interface"]:
807
service.interface = if_nametoindex\
808
(server_settings["interface"])
813
# From the Avahi example code
814
DBusGMainLoop(set_as_default=True )
815
main_loop = gobject.MainLoop()
816
bus = dbus.SystemBus()
817
server = dbus.Interface(bus.get_object(avahi.DBUS_NAME,
818
avahi.DBUS_PATH_SERVER),
819
avahi.DBUS_INTERFACE_SERVER)
820
# End of Avahi example code
822
def remove_from_clients(client):
823
clients.remove(client)
825
logger.critical(u"No clients left, exiting")
828
clients.update(Set(Client(name = section,
829
stop_hook = remove_from_clients,
831
= dict(client_config.items(section)))
832
for section in client_config.sections()))
834
logger.critical(u"No clients defined")
838
# Redirect stdin so all checkers get /dev/null
839
null = os.open(os.path.devnull, os.O_NOCTTY | os.O_RDWR)
840
os.dup2(null, sys.stdin.fileno())
845
logger.removeHandler(console)
846
# Close all input and output, do double fork, etc.
851
pidfile.write(str(pid) + "\n")
855
logger.error(u"Could not write to file %r with PID %d",
858
# "pidfile" was never created
863
"Cleanup function; run on exit"
865
# From the Avahi example code
866
if not group is None:
869
# End of Avahi example code
872
client = clients.pop()
873
client.stop_hook = None
876
atexit.register(cleanup)
879
signal.signal(signal.SIGINT, signal.SIG_IGN)
880
signal.signal(signal.SIGHUP, lambda signum, frame: sys.exit())
881
signal.signal(signal.SIGTERM, lambda signum, frame: sys.exit())
295
883
for client in clients:
296
client.stop_checker()
299
if __name__ == "__main__":
887
tcp_server.server_activate()
889
# Find out what port we got
890
service.port = tcp_server.socket.getsockname()[1]
891
logger.info(u"Now listening on address %r, port %d, flowinfo %d,"
892
u" scope_id %d" % tcp_server.socket.getsockname())
894
#service.interface = tcp_server.socket.getsockname()[3]
897
# From the Avahi example code
898
server.connect_to_signal("StateChanged", server_state_changed)
900
server_state_changed(server.GetState())
901
except dbus.exceptions.DBusException, error:
902
logger.critical(u"DBusException: %s", error)
904
# End of Avahi example code
906
gobject.io_add_watch(tcp_server.fileno(), gobject.IO_IN,
907
lambda *args, **kwargs:
908
tcp_server.handle_request\
909
(*args[2:], **kwargs) or True)
911
logger.debug(u"Starting main loop")
913
except AvahiError, error:
914
logger.critical(u"AvahiError: %s" + unicode(error))
916
except KeyboardInterrupt:
920
if __name__ == '__main__':