/mandos/release : revision 19

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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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# following functions: "add_service", "remove_service",

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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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# 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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# You should have received a copy of the GNU General Public License

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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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# Contact the authors at <https://www.fukt.bsnet.se/~belorn/> and

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# <https://www.fukt.bsnet.se/~teddy/>.

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#

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from __future__ import division

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from dbus.mainloop.glib import DBusGMainLoop

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import ctypes

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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 the connecting clients

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# acts as a TLS "server". The clients (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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logger.addHandler(syslogger)

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del syslogger

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class AvahiError(Exception):

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def __init__(self, value):

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self.value = 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 AvahiGroupError(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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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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"""

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def __init__(self, interface = avahi.IF_UNSPEC, name = None,

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type = None, port = None, TXT = None, domain = "",

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host = "", max_renames = 12):

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self.interface = interface

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self.name = name

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self.type = type

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self.port = port

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if TXT is None:

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self.TXT = []

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else:

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self.TXT = TXT

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self.domain = domain

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self.host = host

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self.rename_count = 0

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def rename(self):

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"""Derived from the Avahi example code"""

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if self.rename_count >= self.max_renames:

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logger.critical(u"No suitable service name found after %i"

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u" retries, exiting.", rename_count)

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raise AvahiServiceError("Too many renames")

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name = server.GetAlternativeServiceName(name)

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logger.error(u"Changing name to %r ...", name)

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self.remove()

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self.add()

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self.rename_count += 1

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def remove(self):

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"""Derived from the Avahi example code"""

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if group is not None:

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group.Reset()

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def add(self):

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"""Derived from the Avahi example code"""

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global group

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if group is None:

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group = dbus.Interface\

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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 service '%s' of type '%s' ...",

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service.name, service.type)

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group.AddService(

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self.interface, # interface

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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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group.Commit()

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# This variable is used to optionally bind to a specified interface.

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# It is a global variable to fit in with the other variables from the

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# Avahi example code.

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serviceInterface = avahi.IF_UNSPEC

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# From the Avahi example code:

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group = None # our entry group

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serviceName = "Mandos"

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serviceType = "_mandos._tcp" # http://www.dns-sd.org/ServiceTypes.html

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servicePort = None # Not known at startup

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serviceTXT = [] # TXT record for the service

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domain = "" # Domain to publish on, default to .local

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host = "" # Host to publish records for, default to localhost

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group = None #our entry group

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rename_count = 12 # Counter so we only rename after collisions a

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# sensible number of times

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# End of Avahi example code

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uniquely identify the client

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secret: bytestring; sent verbatim (over TLS) to client

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fqdn: string (FQDN); 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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created: datetime.datetime()

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last_seen: datetime.datetime() or None if not yet seen

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timeout: datetime.timedelta(); How long from last_seen until

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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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Is 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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client lives. %()s 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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Private attibutes:

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_timeout: Real variable for 'timeout'

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_interval: Real variable for 'interval'

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_timeout_milliseconds: Used when calling gobject.timeout_add()

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_timeout_milliseconds: Used by gobject.timeout_add()

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_interval_milliseconds: - '' -

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"""

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def _set_timeout(self, timeout):

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interval = property(lambda self: self._interval,

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_set_interval)

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del _set_interval

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def __init__(self, name = None, stop_hook=None, config={}):

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"""Note: the 'checker' key in 'config' sets the

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'checker_command' attribute and *not* the 'checker'

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attribute."""

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def __init__(self, name=None, options=None, stop_hook=None,

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fingerprint=None, secret=None, secfile=None,

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fqdn=None, timeout=None, interval=-1, checker=None):

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"""Note: the 'checker' argument sets the 'checker_command'

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attribute and not the 'checker' attribute.."""

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self.name = name

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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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# function

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self.fingerprint = config["fingerprint"].upper()\

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.replace(u" ", u"")

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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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sf = open(config["secfile"])

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# Uppercase and remove spaces from fingerprint

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# for later comparison purposes with return value of

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# the fingerprint() function

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self.fingerprint = fingerprint.upper().replace(u" ", u"")

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if secret:

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self.secret = secret.decode(u"base64")

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elif secfile:

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sf = open(secfile)

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self.secret = sf.read()

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sf.close()

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else:

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raise TypeError(u"No secret or secfile for client %s"

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% self.name)

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self.fqdn = config.get("fqdn", "")

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raise RuntimeError(u"No secret or secfile for client %s"

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% self.name)

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self.fqdn = fqdn # string

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self.created = datetime.datetime.now()

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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.last_seen = None

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if timeout is None:

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self.timeout = options.timeout

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else:

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self.timeout = string_to_delta(timeout)

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if interval == -1:

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self.interval = options.interval

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else:

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self.interval = string_to_delta(interval)

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self.stop_hook = stop_hook

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self.checker = None

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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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self.check_command = checker

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def start(self):

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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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self.stop)

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def stop(self):

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"""Stop this client.

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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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The possibility that this client might be restarted is left

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open, 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 self.secret:

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logger.info(u"Stopping client %s", self.name)

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logger.debug(u"Stopping client %s", self.name)

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self.secret = None

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else:

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return False

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if getattr(self, "stop_initiator_tag", False):

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if hasattr(self, "stop_initiator_tag") \

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and self.stop_initiator_tag:

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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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if hasattr(self, "checker_initiator_tag") \

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and self.checker_initiator_tag:

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gobject.source_remove(self.checker_initiator_tag)

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self.checker_initiator_tag = None

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self.stop_checker()

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self.checker = 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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vars(self))

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self.last_checked_ok = now

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logger.debug(u"Checker for %(name)s succeeded",

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vars(self))

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self.last_seen = 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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logger.warning(u"Checker for %(name)s crashed?",

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vars(self))

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else:

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logger.info(u"Checker for %(name)s failed",

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vars(self))

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logger.debug(u"Checker for %(name)s failed",

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vars(self))

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def start_checker(self):

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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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# is as it should be.

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if self.checker is None:

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try:

315

# In case check_command has exactly one % operator

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command = self.check_command % self.fqdn

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except TypeError:

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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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for key, val in

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vars(self).iteritems())

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try:

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command = self.check_command % escaped_attrs

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except TypeError, error:

325

logger.error(u'Could not format string "%s":'

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u' %s', self.check_command, error)

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logger.critical(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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try:

329

logger.info(u"Starting checker %r for %s",

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command, self.name)

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self.checker = subprocess.Popen(command,

332

close_fds=True,

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shell=True, cwd="/")

276

logger.debug(u"Starting checker %r for %s",

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command, self.name)

278

self.checker = subprocess.\

279

Popen(command,

280

close_fds=True, shell=True,

281

cwd="/")

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self.checker_callback_tag = gobject.child_watch_add\

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(self.checker.pid,

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self.checker_callback)

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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

347

if getattr(self, "checker", None) is None:

295

if not hasattr(self, "checker") or self.checker is None:

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return

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logger.debug("Stopping checker for %(name)s", vars(self))

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try:

353

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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:

356

if error.errno != errno.ESRCH: # No such process

304

if error.errno != errno.ESRCH:

357

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raise

358

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self.checker = None

359

def still_valid(self):

307

def still_valid(self, now=None):

360

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"""Has the timeout not yet passed for this client?"""

361

now = datetime.datetime.now()

362

if self.last_checked_ok is None:

309

if now is None:

310

now = datetime.datetime.now()

311

if self.last_seen is None:

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return now < (self.created + self.timeout)

364

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else:

365

return now < (self.last_checked_ok + self.timeout)

314

return now < (self.last_seen + self.timeout)

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368

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def peer_certificate(session):

384

333

385

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def fingerprint(openpgp):

386

335

"Convert an OpenPGP bytestring to a hexdigit fingerprint string"

336

# New empty GnuTLS certificate

337

crt = gnutls.library.types.gnutls_openpgp_crt_t()

338

gnutls.library.functions.gnutls_openpgp_crt_init\

339

(ctypes.byref(crt))

387

340

# New GnuTLS "datum" with the OpenPGP public key

388

341

datum = gnutls.library.types.gnutls_datum_t\

389

342

(ctypes.cast(ctypes.c_char_p(openpgp),

390

343

ctypes.POINTER(ctypes.c_ubyte)),

391

344

ctypes.c_uint(len(openpgp)))

392

# New empty GnuTLS certificate

393

crt = gnutls.library.types.gnutls_openpgp_crt_t()

394

gnutls.library.functions.gnutls_openpgp_crt_init\

395

(ctypes.byref(crt))

396

345

# Import the OpenPGP public key into the certificate

397

gnutls.library.functions.gnutls_openpgp_crt_import\

398

(crt, ctypes.byref(datum),

399

gnutls.library.constants.GNUTLS_OPENPGP_FMT_RAW)

346

ret = gnutls.library.functions.gnutls_openpgp_crt_import\

347

(crt,

348

ctypes.byref(datum),

349

gnutls.library.constants.GNUTLS_OPENPGP_FMT_RAW)

400

350

# New buffer for the fingerprint

401

351

buffer = ctypes.create_string_buffer(20)

402

352

buffer_length = ctypes.c_size_t()

418

368

Note: This will run in its own forked process."""

419

369

420

370

def handle(self):

421

logger.info(u"TCP connection from: %s",

371

logger.debug(u"TCP connection from: %s",

422

372

unicode(self.client_address))

423

session = gnutls.connection.ClientSession\

424

(self.request, gnutls.connection.X509Credentials())

425

426

line = self.request.makefile().readline()

427

logger.debug(u"Protocol version: %r", line)

428

try:

429

if int(line.strip().split()[0]) > 1:

430

raise RuntimeError

431

except (ValueError, IndexError, RuntimeError), error:

432

logger.error(u"Unknown protocol version: %s", error)

433

return

434

435

# Note: gnutls.connection.X509Credentials is really a generic

436

# GnuTLS certificate credentials object so long as no X.509

437

# keys are added to it. Therefore, we can use it here despite

438

# using OpenPGP certificates.

373

session = gnutls.connection.ClientSession(self.request,

374

gnutls.connection.\

375

X509Credentials())

439

376

440

377

#priority = ':'.join(("NONE", "+VERS-TLS1.1", "+AES-256-CBC",

441

378

# "+SHA1", "+COMP-NULL", "+CTYPE-OPENPGP",

442

379

# "+DHE-DSS"))

443

priority = "NORMAL" # Fallback default, since this

444

# MUST be set.

445

if self.server.settings["priority"]:

446

priority = self.server.settings["priority"]

380

priority = "SECURE256"

381

447

382

gnutls.library.functions.gnutls_priority_set_direct\

448

383

(session._c_object, priority, None);

449

384

450

385

try:

451

386

session.handshake()

452

387

except gnutls.errors.GNUTLSError, error:

453

logger.warning(u"Handshake failed: %s", error)

388

logger.debug(u"Handshake failed: %s", error)

454

389

# Do not run session.bye() here: the session is not

455

390

# established. Just abandon the request.

456

391

return

457

392

try:

458

393

fpr = fingerprint(peer_certificate(session))

459

394

except (TypeError, gnutls.errors.GNUTLSError), error:

460

logger.warning(u"Bad certificate: %s", error)

395

logger.debug(u"Bad certificate: %s", error)

461

396

session.bye()

462

397

return

463

398

logger.debug(u"Fingerprint: %s", fpr)

466

401

if c.fingerprint == fpr:

467

402

client = c

468

403

break

469

if not client:

470

logger.warning(u"Client not found for fingerprint: %s",

471

fpr)

472

session.bye()

473

return

474

404

# Have to check if client.still_valid(), since it is possible

475

405

# that the client timed out while establishing the GnuTLS

476

406

# session.

477

if not client.still_valid():

478

logger.warning(u"Client %(name)s is invalid",

479

vars(client))

407

if (not client) or (not client.still_valid()):

408

if client:

409

logger.debug(u"Client %(name)s is invalid",

410

vars(client))

411

else:

412

logger.debug(u"Client not found for fingerprint: %s",

413

fpr)

480

414

session.bye()

481

415

return

482

416

sent_size = 0

492

426

class IPv6_TCPServer(SocketServer.ForkingTCPServer, object):

493

427

"""IPv6 TCP server. Accepts 'None' as address and/or port.

494

428

Attributes:

495

settings: Server settings

429

options: Command line options

496

430

clients: Set() of Client objects

497

431

"""

498

432

address_family = socket.AF_INET6

499

433

def __init__(self, *args, **kwargs):

500

if "settings" in kwargs:

501

self.settings = kwargs["settings"]

502

del kwargs["settings"]

434

if "options" in kwargs:

435

self.options = kwargs["options"]

436

del kwargs["options"]

503

437

if "clients" in kwargs:

504

438

self.clients = kwargs["clients"]

505

439

del kwargs["clients"]

508

442

"""This overrides the normal server_bind() function

509

443

to bind to an interface if one was specified, and also NOT to

510

444

bind to an address or port if they were not specified."""

511

if self.settings["interface"]:

512

# 25 is from /usr/include/asm-i486/socket.h

513

SO_BINDTODEVICE = getattr(socket, "SO_BINDTODEVICE", 25)

445

if self.options.interface:

446

if not hasattr(socket, "SO_BINDTODEVICE"):

447

# From /usr/include/asm-i486/socket.h

448

socket.SO_BINDTODEVICE = 25

514

449

try:

515

450

self.socket.setsockopt(socket.SOL_SOCKET,

516

SO_BINDTODEVICE,

517

self.settings["interface"])

451

socket.SO_BINDTODEVICE,

452

self.options.interface)

518

453

except socket.error, error:

519

454

if error[0] == errno.EPERM:

520

logger.error(u"No permission to"

521

u" bind to interface %s",

522

self.settings["interface"])

455

logger.warning(u"No permission to"

456

u" bind to interface %s",

457

self.options.interface)

523

458

else:

524

459

raise error

525

460

# Only bind(2) the socket if we really need to.

568

503

return delta

569

504

570

505

506

def add_service():

507

"""Derived from the Avahi example code"""

508

global group, serviceName, serviceType, servicePort, serviceTXT, \

509

domain, host

510

if group is None:

511

group = dbus.Interface(

512

bus.get_object( avahi.DBUS_NAME,

513

server.EntryGroupNew()),

514

avahi.DBUS_INTERFACE_ENTRY_GROUP)

515

group.connect_to_signal('StateChanged',

516

entry_group_state_changed)

517

logger.debug(u"Adding service '%s' of type '%s' ...",

518

serviceName, serviceType)

519

520

group.AddService(

521

serviceInterface, # interface

522

avahi.PROTO_INET6, # protocol

523

dbus.UInt32(0), # flags

524

serviceName, serviceType,

525

domain, host,

526

dbus.UInt16(servicePort),

527

avahi.string_array_to_txt_array(serviceTXT))

528

group.Commit()

529

530

531

def remove_service():

532

"""From the Avahi example code"""

533

global group

534

535

if not group is None:

536

group.Reset()

537

538

571

539

def server_state_changed(state):

572

540

"""Derived from the Avahi example code"""

573

541

if state == avahi.SERVER_COLLISION:

574

logger.error(u"Server name collision")

575

service.remove()

542

logger.warning(u"Server name collision")

543

remove_service()

576

544

elif state == avahi.SERVER_RUNNING:

577

service.add()

545

add_service()

578

546

579

547

580

548

def entry_group_state_changed(state, error):

581

549

"""Derived from the Avahi example code"""

550

global serviceName, server, rename_count

551

582

552

logger.debug(u"state change: %i", state)

583

553

584

554

if state == avahi.ENTRY_GROUP_ESTABLISHED:

585

555

logger.debug(u"Service established.")

586

556

elif state == avahi.ENTRY_GROUP_COLLISION:

587

logger.warning(u"Service name collision.")

588

service.rename()

557

558

rename_count = rename_count - 1

559

if rename_count > 0:

560

name = server.GetAlternativeServiceName(name)

561

logger.warning(u"Service name collision, "

562

u"changing name to '%s' ...", name)

563

remove_service()

564

add_service()

565

566

else:

567

logger.error(u"No suitable service name found after %i"

568

u" retries, exiting.", n_rename)

569

killme(1)

589

570

elif state == avahi.ENTRY_GROUP_FAILURE:

590

logger.critical(u"Error in group state changed %s",

591

unicode(error))

592

raise AvahiGroupError("State changed: %s", str(error))

571

logger.error(u"Error in group state changed %s",

572

unicode(error))

573

killme(1)

574

593

575

594

576

def if_nametoindex(interface):

595

"""Call the C function if_nametoindex(), or equivalent"""

596

global if_nametoindex

577

"""Call the C function if_nametoindex()"""

597

578

try:

598

if "ctypes.util" not in sys.modules:

599

import ctypes.util

600

if_nametoindex = ctypes.cdll.LoadLibrary\

601

(ctypes.util.find_library("c")).if_nametoindex

579

libc = ctypes.cdll.LoadLibrary("libc.so.6")

580

return libc.if_nametoindex(interface)

602

581

except (OSError, AttributeError):

603

582

if "struct" not in sys.modules:

604

583

import struct

605

584

if "fcntl" not in sys.modules:

606

585

import fcntl

607

def if_nametoindex(interface):

608

"Get an interface index the hard way, i.e. using fcntl()"

609

SIOCGIFINDEX = 0x8933 # From /usr/include/linux/sockios.h

610

s = socket.socket()

611

ifreq = fcntl.ioctl(s, SIOCGIFINDEX,

612

struct.pack("16s16x", interface))

613

s.close()

614

interface_index = struct.unpack("I", ifreq[16:20])[0]

615

return interface_index

616

return if_nametoindex(interface)

617

618

619

def daemon(nochdir = False, noclose = False):

586

SIOCGIFINDEX = 0x8933 # From /usr/include/linux/sockios.h

587

s = socket.socket()

588

ifreq = fcntl.ioctl(s, SIOCGIFINDEX,

589

struct.pack("16s16x", interface))

590

s.close()

591

interface_index = struct.unpack("I", ifreq[16:20])[0]

592

return interface_index

593

594

595

def daemon(nochdir, noclose):

620

596

"""See daemon(3). Standard BSD Unix function.

621

597

This should really exist as os.daemon, but it doesn't (yet)."""

622

598

if os.fork():

624

600

os.setsid()

625

601

if not nochdir:

626

602

os.chdir("/")

627

if os.fork():

628

sys.exit()

629

603

if not noclose:

630

604

# Close all standard open file descriptors

631

null = os.open(os.path.devnull, os.O_NOCTTY | os.O_RDWR)

605

null = os.open("/dev/null", os.O_NOCTTY | os.O_RDWR)

632

606

if not stat.S_ISCHR(os.fstat(null).st_mode):

633

607

raise OSError(errno.ENODEV,

634

608

"/dev/null not a character device")

639

613

os.close(null)

640

614

641

615

616

def killme(status = 0):

617

logger.debug("Stopping server with exit status %d", status)

618

exitstatus = status

619

if main_loop_started:

620

main_loop.quit()

621

else:

622

sys.exit(status)

623

624

642

625

def main():

626

global exitstatus

627

exitstatus = 0

643

628

global main_loop_started

644

629

main_loop_started = False

645

630

646

631

parser = OptionParser()

647

632

parser.add_option("-i", "--interface", type="string",

648

metavar="IF", help="Bind to interface IF")

649

parser.add_option("-a", "--address", type="string",

633

default=None, metavar="IF",

634

help="Bind to interface IF")

635

parser.add_option("-a", "--address", type="string", default=None,

650

636

help="Address to listen for requests on")

651

parser.add_option("-p", "--port", type="int",

637

parser.add_option("-p", "--port", type="int", default=None,

652

638

help="Port number to receive requests on")

639

parser.add_option("--timeout", type="string", # Parsed later

640

default="1h",

641

help="Amount of downtime allowed for clients")

642

parser.add_option("--interval", type="string", # Parsed later

643

default="5m",

644

help="How often to check that a client is up")

653

645

parser.add_option("--check", action="store_true", default=False,

654

646

help="Run self-test")

655

647

parser.add_option("--debug", action="store_true", default=False,

656

help="Debug mode; run in foreground and log to"

657

" terminal")

658

parser.add_option("--priority", type="string", help="GnuTLS"

659

" priority string (see GnuTLS documentation)")

660

parser.add_option("--servicename", type="string", metavar="NAME",

661

help="Zeroconf service name")

662

parser.add_option("--configdir", type="string",

663

default="/etc/mandos", metavar="DIR",

664

help="Directory to search for configuration"

665

" files")

648

help="Debug mode")

666

649

(options, args) = parser.parse_args()

667

650

668

651

if options.check:

670

653

doctest.testmod()

671

654

sys.exit()

672

655

673

# Default values for config file for server-global settings

674

server_defaults = { "interface": "",

675

"address": "",

676

"port": "",

677

"debug": "False",

678

"priority":

679

"SECURE256:!CTYPE-X.509:+CTYPE-OPENPGP",

680

"servicename": "Mandos",

681

}

682

683

# Parse config file for server-global settings

684

server_config = ConfigParser.SafeConfigParser(server_defaults)

685

del server_defaults

686

server_config.read(os.path.join(options.configdir, "mandos.conf"))

687

server_section = "server"

688

# Convert the SafeConfigParser object to a dict

689

server_settings = dict(server_config.items(server_section))

690

# Use getboolean on the boolean config option

691

server_settings["debug"] = server_config.getboolean\

692

(server_section, "debug")

693

del server_config

694

695

# Override the settings from the config file with command line

696

# options, if set.

697

for option in ("interface", "address", "port", "debug",

698

"priority", "servicename", "configdir"):

699

value = getattr(options, option)

700

if value is not None:

701

server_settings[option] = value

702

del options

703

# Now we have our good server settings in "server_settings"

704

705

# Parse config file with clients

706

client_defaults = { "timeout": "1h",

707

"interval": "5m",

708

"checker": "fping -q -- %%(fqdn)s",

709

}

710

client_config = ConfigParser.SafeConfigParser(client_defaults)

711

client_config.read(os.path.join(server_settings["configdir"],

712

"clients.conf"))

713

714

global service

715

service = AvahiService(name = server_settings["servicename"],

716

type = "_mandos._tcp", );

717

if server_settings["interface"]:

718

service.interface = if_nametoindex(server_settings["interface"])

656

# Parse the time arguments

657

try:

658

options.timeout = string_to_delta(options.timeout)

659

except ValueError:

660

parser.error("option --timeout: Unparseable time")

661

try:

662

options.interval = string_to_delta(options.interval)

663

except ValueError:

664

parser.error("option --interval: Unparseable time")

665

666

# Parse config file

667

defaults = { "checker": "fping -q -- %%(fqdn)s" }

668

client_config = ConfigParser.SafeConfigParser(defaults)

669

#client_config.readfp(open("global.conf"), "global.conf")

670

client_config.read("mandos-clients.conf")

719

671

720

672

global main_loop

721

673

global bus

729

681

avahi.DBUS_INTERFACE_SERVER )

730

682

# End of Avahi example code

731

683

732

debug = server_settings["debug"]

684

debug = options.debug

733

685

734

686

if debug:

735

687

console = logging.StreamHandler()

743

695

def remove_from_clients(client):

744

696

clients.remove(client)

745

697

if not clients:

746

logger.critical(u"No clients left, exiting")

747

sys.exit()

698

logger.debug(u"No clients left, exiting")

699

killme()

748

700

749

clients.update(Set(Client(name = section,

701

clients.update(Set(Client(name=section, options=options,

750

702

stop_hook = remove_from_clients,

751

config

752

= dict(client_config.items(section)))

703

**(dict(client_config\

704

.items(section))))

753

705

for section in client_config.sections()))

754

706

755

707

if not debug:

756

daemon()

708

daemon(False, False)

757

709

758

710

def cleanup():

759

711

"Cleanup function; run on exit"

773

725

774

726

if not debug:

775

727

signal.signal(signal.SIGINT, signal.SIG_IGN)

776

signal.signal(signal.SIGHUP, lambda signum, frame: sys.exit())

777

signal.signal(signal.SIGTERM, lambda signum, frame: sys.exit())

728

signal.signal(signal.SIGHUP, lambda signum, frame: killme())

729

signal.signal(signal.SIGTERM, lambda signum, frame: killme())

778

730

779

731

for client in clients:

780

732

client.start()

781

733

782

tcp_server = IPv6_TCPServer((server_settings["address"],

783

server_settings["port"]),

734

tcp_server = IPv6_TCPServer((options.address, options.port),

784

735

tcp_handler,

785

settings=server_settings,

736

options=options,

786

737

clients=clients)

787

# Find out what port we got

788

service.port = tcp_server.socket.getsockname()[1]

789

logger.info(u"Now listening on address %r, port %d, flowinfo %d,"

790

u" scope_id %d" % tcp_server.socket.getsockname())

791

792

#service.interface = tcp_server.socket.getsockname()[3]

793

794

try:

795

# From the Avahi example code

796

server.connect_to_signal("StateChanged", server_state_changed)

797

try:

798

server_state_changed(server.GetState())

799

except dbus.exceptions.DBusException, error:

800

logger.critical(u"DBusException: %s", error)

801

sys.exit(1)

802

# End of Avahi example code

803

804

gobject.io_add_watch(tcp_server.fileno(), gobject.IO_IN,

805

lambda *args, **kwargs:

806

tcp_server.handle_request\

807

(*args[2:], **kwargs) or True)

808

738

# Find out what random port we got

739

global servicePort

740

servicePort = tcp_server.socket.getsockname()[1]

741

logger.debug(u"Now listening on port %d", servicePort)

742

743

if options.interface is not None:

744

global serviceInterface

745

serviceInterface = if_nametoindex(options.interface)

746

747

# From the Avahi example code

748

server.connect_to_signal("StateChanged", server_state_changed)

749

try:

750

server_state_changed(server.GetState())

751

except dbus.exceptions.DBusException, error:

752

logger.critical(u"DBusException: %s", error)

753

killme(1)

754

# End of Avahi example code

755

756

gobject.io_add_watch(tcp_server.fileno(), gobject.IO_IN,

757

lambda *args, **kwargs:

758

tcp_server.handle_request(*args[2:],

759

**kwargs) or True)

760

try:

809

761

logger.debug("Starting main loop")

810

762

main_loop_started = True

811

763

main_loop.run()

812

except AvahiError, error:

813

logger.critical(u"AvahiError: %s" + unicode(error))

814

sys.exit(1)

815

764

except KeyboardInterrupt:

816

765

if debug:

817

766

print

767

768

sys.exit(exitstatus)

818

769

819

770

if __name__ == '__main__':

820

771

main()