/mandos/trunk : revision 665

1

#!/usr/bin/python2.7

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#!/usr/bin/python

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# -*- mode: python; coding: utf-8 -*-

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#

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# Mandos server - give out binary blobs to connecting clients.

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except ImportError:

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SO_BINDTODEVICE = None

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version = "1.6.8"

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version = "1.6.4"

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stored_state_file = "clients.pickle"

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logger = logging.getLogger()

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

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with contextlib.closing(socket.socket()) as s:

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ifreq = fcntl.ioctl(s, SIOCGIFINDEX,

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

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

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

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interface))

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interface_index = struct.unpack(str("I"),

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ifreq[16:20])[0]

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return interface_index

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def initlogger(debug, level=logging.WARNING):

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"""init logger and add loglevel"""

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global syslogger

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syslogger = (logging.handlers.SysLogHandler

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(facility =

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logging.handlers.SysLogHandler.LOG_DAEMON,

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address = "/dev/log"))

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address = str("/dev/log")))

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syslogger.setFormatter(logging.Formatter

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('Mandos [%(process)d]: %(levelname)s:'

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' %(message)s'))

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class AvahiError(Exception):

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

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self.value = value

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return super(AvahiError, self).__init__(value, *args,

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**kwargs)

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super(AvahiError, self).__init__(value, *args, **kwargs)

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def __unicode__(self):

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return unicode(repr(self.value))

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class AvahiServiceError(AvahiError):

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pass

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elif state == avahi.ENTRY_GROUP_FAILURE:

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

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unicode(error))

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raise AvahiGroupError("State changed: {!s}"

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raise AvahiGroupError("State changed: {0!s}"

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.format(error))

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def cleanup(self):

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"""Add the new name to the syslog messages"""

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ret = AvahiService.rename(self)

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syslogger.setFormatter(logging.Formatter

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('Mandos ({}) [%(process)d]:'

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('Mandos ({0}) [%(process)d]:'

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' %(levelname)s: %(message)s'

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.format(self.name)))

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return ret

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def timedelta_to_milliseconds(td):

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"Convert a datetime.timedelta() to milliseconds"

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return ((td.days * 24 * 60 * 60 * 1000)

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+ (td.seconds * 1000)

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+ (td.microseconds // 1000))

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class Client(object):

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"""A representation of a client host served by this server.

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"enabled": "True",

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}

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def timeout_milliseconds(self):

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"Return the 'timeout' attribute in milliseconds"

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return timedelta_to_milliseconds(self.timeout)

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def extended_timeout_milliseconds(self):

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"Return the 'extended_timeout' attribute in milliseconds"

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return timedelta_to_milliseconds(self.extended_timeout)

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def interval_milliseconds(self):

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"Return the 'interval' attribute in milliseconds"

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return timedelta_to_milliseconds(self.interval)

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def approval_delay_milliseconds(self):

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return timedelta_to_milliseconds(self.approval_delay)

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@staticmethod

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def config_parser(config):

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"""Construct a new dict of client settings of this form:

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"rb") as secfile:

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client["secret"] = secfile.read()

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else:

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raise TypeError("No secret or secfile for section {}"

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raise TypeError("No secret or secfile for section {0}"

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.format(section))

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client["timeout"] = string_to_delta(section["timeout"])

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client["extended_timeout"] = string_to_delta(

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server_settings = {}

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self.server_settings = server_settings

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# adding all client settings

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for setting, value in settings.items():

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for setting, value in settings.iteritems():

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setattr(self, setting, value)

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if self.enabled:

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if self.checker_initiator_tag is not None:

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gobject.source_remove(self.checker_initiator_tag)

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self.checker_initiator_tag = (gobject.timeout_add

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(int(self.interval

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.total_seconds() * 1000),

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(self.interval_milliseconds(),

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self.start_checker))

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# Schedule a disable() when 'timeout' has passed

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if self.disable_initiator_tag is not None:

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gobject.source_remove(self.disable_initiator_tag)

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self.disable_initiator_tag = (gobject.timeout_add

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(int(self.timeout

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.total_seconds() * 1000),

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self.disable))

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(self.timeout_milliseconds(),

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self.disable))

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# Also start a new checker *right now*.

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self.start_checker()

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self.disable_initiator_tag = None

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

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self.disable_initiator_tag = (gobject.timeout_add

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(int(timeout.total_seconds()

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* 1000), self.disable))

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(timedelta_to_milliseconds

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(timeout), self.disable))

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self.expires = datetime.datetime.utcnow() + timeout

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def need_approval(self):

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# Start a new checker if needed

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if self.checker is None:

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# Escape attributes for the shell

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escaped_attrs = { attr:

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re.escape(unicode(getattr(self,

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attr)))

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for attr in self.runtime_expansions }

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escaped_attrs = dict(

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(attr, re.escape(unicode(getattr(self, attr))))

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for attr in

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self.runtime_expansions)

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try:

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command = self.checker_command % escaped_attrs

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except TypeError as error:

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# "Set" method, so we fail early here:

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if byte_arrays and signature != "ay":

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raise ValueError("Byte arrays not supported for non-'ay'"

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" signature {!r}".format(signature))

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" signature {0!r}".format(signature))

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def decorator(func):

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func._dbus_is_property = True

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func._dbus_interface = dbus_interface

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class DBusPropertyException(dbus.exceptions.DBusException):

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"""A base class for D-Bus property-related exceptions

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"""

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pass

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def __unicode__(self):

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return unicode(str(self))

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class DBusPropertyAccessException(DBusPropertyException):

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"""A property's access permissions disallows an operation.

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If called like _is_dbus_thing("method") it returns a function

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suitable for use as predicate to inspect.getmembers().

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"""

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return lambda obj: getattr(obj, "_dbus_is_{}".format(thing),

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return lambda obj: getattr(obj, "_dbus_is_{0}".format(thing),

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False)

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def _get_all_dbus_things(self, thing):

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# signatures other than "ay".

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if prop._dbus_signature != "ay":

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raise ValueError("Byte arrays not supported for non-"

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"'ay' signature {!r}"

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"'ay' signature {0!r}"

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.format(prop._dbus_signature))

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value = dbus.ByteArray(b''.join(chr(byte)

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for byte in value))

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(prop,

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"_dbus_annotations",

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{}))

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for name, value in annots.items():

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for name, value in annots.iteritems():

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ann_tag = document.createElement(

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"annotation")

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ann_tag.setAttribute("name", name)

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# Add interface annotation tags

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for annotation, value in dict(

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itertools.chain.from_iterable(

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annotations().items()

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annotations().iteritems()

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for name, annotations in

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self._get_all_dbus_things("interface")

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if name == if_tag.getAttribute("name")

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)).items():

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)).iteritems():

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ann_tag = document.createElement("annotation")

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ann_tag.setAttribute("name", annotation)

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ann_tag.setAttribute("value", value)

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"""

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def wrapper(cls):

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for orig_interface_name, alt_interface_name in (

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alt_interface_names.items()):

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alt_interface_names.iteritems()):

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attr = {}

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interface_names = set()

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# Go though all attributes of the class

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attribute.func_closure)))

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if deprecate:

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# Deprecate all alternate interfaces

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iname="_AlternateDBusNames_interface_annotation{}"

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iname="_AlternateDBusNames_interface_annotation{0}"

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for interface_name in interface_names:

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@dbus_interface_annotations(interface_name)

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def func(self):

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if interface_names:

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# Replace the class with a new subclass of it with

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# methods, signals, etc. as created above.

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cls = type(b"{}Alternate".format(cls.__name__),

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cls = type(b"{0}Alternate".format(cls.__name__),

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(cls,), attr)

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return cls

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return wrapper

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to the D-Bus. Default: no transform

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variant_level: D-Bus variant level. Default: 1

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"""

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attrname = "_{}".format(dbus_name)

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attrname = "_{0}".format(dbus_name)

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def setter(self, value):

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if hasattr(self, "dbus_object_path"):

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if (not hasattr(self, attrname) or

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approval_delay = notifychangeproperty(dbus.UInt64,

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"ApprovalDelay",

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type_func =

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lambda td: td.total_seconds()

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* 1000)

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timedelta_to_milliseconds)

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approval_duration = notifychangeproperty(

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dbus.UInt64, "ApprovalDuration",

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type_func = lambda td: td.total_seconds() * 1000)

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type_func = timedelta_to_milliseconds)

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host = notifychangeproperty(dbus.String, "Host")

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timeout = notifychangeproperty(dbus.UInt64, "Timeout",

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type_func = lambda td:

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td.total_seconds() * 1000)

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type_func =

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timedelta_to_milliseconds)

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extended_timeout = notifychangeproperty(

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dbus.UInt64, "ExtendedTimeout",

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type_func = lambda td: td.total_seconds() * 1000)

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type_func = timedelta_to_milliseconds)

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interval = notifychangeproperty(dbus.UInt64,

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"Interval",

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type_func =

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lambda td: td.total_seconds()

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* 1000)

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timedelta_to_milliseconds)

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checker_command = notifychangeproperty(dbus.String, "Checker")

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del notifychangeproperty

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def approve(self, value=True):

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self.approved = value

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gobject.timeout_add(int(self.approval_duration.total_seconds()

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* 1000), self._reset_approved)

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gobject.timeout_add(timedelta_to_milliseconds

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(self.approval_duration),

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self._reset_approved)

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self.send_changedstate()

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## D-Bus methods, signals & properties

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access="readwrite")

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def ApprovalDelay_dbus_property(self, value=None):

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if value is None: # get

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return dbus.UInt64(self.approval_delay.total_seconds()

1459

* 1000)

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return dbus.UInt64(self.approval_delay_milliseconds())

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self.approval_delay = datetime.timedelta(0, 0, 0, value)

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# ApprovalDuration - property

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access="readwrite")

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def ApprovalDuration_dbus_property(self, value=None):

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if value is None: # get

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return dbus.UInt64(self.approval_duration.total_seconds()

1468

* 1000)

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return dbus.UInt64(timedelta_to_milliseconds(

1490

self.approval_duration))

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self.approval_duration = datetime.timedelta(0, 0, 0, value)

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# Name - property

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access="readwrite")

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def Timeout_dbus_property(self, value=None):

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if value is None: # get

1540

return dbus.UInt64(self.timeout.total_seconds() * 1000)

1562

return dbus.UInt64(self.timeout_milliseconds())

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old_timeout = self.timeout

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self.timeout = datetime.timedelta(0, 0, 0, value)

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# Reschedule disabling

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gobject.source_remove(self.disable_initiator_tag)

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1577

self.disable_initiator_tag = (

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1578

gobject.timeout_add(

1557

int((self.expires - now).total_seconds()

1558

* 1000), self.disable))

1579

timedelta_to_milliseconds(self.expires - now),

1580

self.disable))

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1581

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1582

# ExtendedTimeout - property

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1583

@dbus_service_property(_interface, signature="t",

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1584

access="readwrite")

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1585

def ExtendedTimeout_dbus_property(self, value=None):

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1586

if value is None: # get

1565

return dbus.UInt64(self.extended_timeout.total_seconds()

1566

* 1000)

1587

return dbus.UInt64(self.extended_timeout_milliseconds())

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1588

self.extended_timeout = datetime.timedelta(0, 0, 0, value)

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1589

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1590

# Interval - property

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1592

access="readwrite")

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1593

def Interval_dbus_property(self, value=None):

1573

1594

if value is None: # get

1574

return dbus.UInt64(self.interval.total_seconds() * 1000)

1595

return dbus.UInt64(self.interval_milliseconds())

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1596

self.interval = datetime.timedelta(0, 0, 0, value)

1576

1597

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

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1598

return

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1631

@dbus_service_property(_interface, signature="ay",

1611

1632

access="write", byte_arrays=True)

1612

1633

def Secret_dbus_property(self, value):

1613

self.secret = bytes(value)

1634

self.secret = str(value)

1614

1635

1615

1636

del _interface

1616

1637

1737

1758

if self.server.use_dbus:

1738

1759

# Emit D-Bus signal

1739

1760

client.NeedApproval(

1740

client.approval_delay.total_seconds()

1741

* 1000, client.approved_by_default)

1761

client.approval_delay_milliseconds(),

1762

client.approved_by_default)

1742

1763

else:

1743

1764

logger.warning("Client %s was not approved",

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1765

client.name)

1750

1771

#wait until timeout or approved

1751

1772

time = datetime.datetime.now()

1752

1773

client.changedstate.acquire()

1753

client.changedstate.wait(delay.total_seconds())

1774

client.changedstate.wait(

1775

float(timedelta_to_milliseconds(delay)

1776

/ 1000))

1754

1777

client.changedstate.release()

1755

1778

time2 = datetime.datetime.now()

1756

1779

if (time2 - time) >= delay:

1955

1978

try:

1956

1979

self.socket.setsockopt(socket.SOL_SOCKET,

1957

1980

SO_BINDTODEVICE,

1958

(self.interface + "\0")

1959

.encode("utf-8"))

1981

str(self.interface + '\0'))

1960

1982

except socket.error as error:

1961

1983

if error.errno == errno.EPERM:

1962

1984

logger.error("No permission to bind to"

2165

2187

token_duration = Token(re.compile(r"P"), None,

2166

2188

frozenset((token_year, token_month,

2167

2189

token_day, token_time,

2168

token_week)))

2190

token_week))),

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2191

# Define starting values

2170

2192

value = datetime.timedelta() # Value so far

2171

2193

found_token = None

2172

followers = frozenset((token_duration,)) # Following valid tokens

2194

followers = frozenset(token_duration,) # Following valid tokens

2173

2195

s = duration # String left to parse

2174

2196

# Loop until end token is found

2175

2197

while found_token is not token_end:

2222

2244

timevalue = datetime.timedelta(0)

2223

2245

for s in interval.split():

2224

2246

try:

2225

suffix = s[-1]

2247

suffix = unicode(s[-1])

2226

2248

value = int(s[:-1])

2227

2249

if suffix == "d":

2228

2250

delta = datetime.timedelta(value)

2235

2257

elif suffix == "w":

2236

2258

delta = datetime.timedelta(0, 0, 0, 0, 0, 0, value)

2237

2259

else:

2238

raise ValueError("Unknown suffix {!r}"

2260

raise ValueError("Unknown suffix {0!r}"

2239

2261

.format(suffix))

2240

2262

except IndexError as e:

2241

2263

raise ValueError(*(e.args))

2258

2280

# Close all standard open file descriptors

2259

2281

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

2260

2282

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

2261

raise OSError(errno.ENODEV, "{} not a character device"

2283

raise OSError(errno.ENODEV,

2284

"{0} not a character device"

2262

2285

.format(os.devnull))

2263

2286

os.dup2(null, sys.stdin.fileno())

2264

2287

os.dup2(null, sys.stdout.fileno())

2274

2297

2275

2298

parser = argparse.ArgumentParser()

2276

2299

parser.add_argument("-v", "--version", action="version",

2277

version = "%(prog)s {}".format(version),

2300

version = "%(prog)s {0}".format(version),

2278

2301

help="show version number and exit")

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2302

parser.add_argument("-i", "--interface", metavar="IF",

2280

2303

help="Bind to interface IF")

2313

2336

help="Directory to save/restore state in")

2314

2337

parser.add_argument("--foreground", action="store_true",

2315

2338

help="Run in foreground", default=None)

2316

parser.add_argument("--no-zeroconf", action="store_false",

2317

dest="zeroconf", help="Do not use Zeroconf",

2318

default=None)

2319

2339

2320

2340

options = parser.parse_args()

2321

2341

2339

2359

"socket": "",

2340

2360

"statedir": "/var/lib/mandos",

2341

2361

"foreground": "False",

2342

"zeroconf": "True",

2343

2362

}

2344

2363

2345

2364

# Parse config file for server-global settings

2372

2391

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

2373

2392

"priority", "servicename", "configdir",

2374

2393

"use_dbus", "use_ipv6", "debuglevel", "restore",

2375

"statedir", "socket", "foreground", "zeroconf"):

2394

"statedir", "socket", "foreground"):

2376

2395

value = getattr(options, option)

2377

2396

if value is not None:

2378

2397

server_settings[option] = value

2379

2398

del options

2380

2399

# Force all strings to be unicode

2381

2400

for option in server_settings.keys():

2382

if isinstance(server_settings[option], bytes):

2383

server_settings[option] = (server_settings[option]

2384

.decode("utf-8"))

2401

if type(server_settings[option]) is str:

2402

server_settings[option] = unicode(server_settings[option])

2385

2403

# Force all boolean options to be boolean

2386

2404

for option in ("debug", "use_dbus", "use_ipv6", "restore",

2387

"foreground", "zeroconf"):

2405

"foreground"):

2388

2406

server_settings[option] = bool(server_settings[option])

2389

2407

# Debug implies foreground

2390

2408

if server_settings["debug"]:

2393

2411

2394

2412

##################################################################

2395

2413

2396

if (not server_settings["zeroconf"] and

2397

not (server_settings["port"]

2398

or server_settings["socket"] != "")):

2399

parser.error("Needs port or socket to work without"

2400

" Zeroconf")

2401

2402

2414

# For convenience

2403

2415

debug = server_settings["debug"]

2404

2416

debuglevel = server_settings["debuglevel"]

2407

2419

stored_state_path = os.path.join(server_settings["statedir"],

2408

2420

stored_state_file)

2409

2421

foreground = server_settings["foreground"]

2410

zeroconf = server_settings["zeroconf"]

2411

2422

2412

2423

if debug:

2413

2424

initlogger(debug, logging.DEBUG)

2420

2431

2421

2432

if server_settings["servicename"] != "Mandos":

2422

2433

syslogger.setFormatter(logging.Formatter

2423

('Mandos ({}) [%(process)d]:'

2434

('Mandos ({0}) [%(process)d]:'

2424

2435

' %(levelname)s: %(message)s'

2425

2436

.format(server_settings

2426

2437

["servicename"])))

2434

2445

global mandos_dbus_service

2435

2446

mandos_dbus_service = None

2436

2447

2437

socketfd = None

2438

if server_settings["socket"] != "":

2439

socketfd = server_settings["socket"]

2440

2448

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

2441

2449

server_settings["port"]),

2442

2450

ClientHandler,

2446

2454

gnutls_priority=

2447

2455

server_settings["priority"],

2448

2456

use_dbus=use_dbus,

2449

socketfd=socketfd)

2457

socketfd=(server_settings["socket"]

2458

or None))

2450

2459

if not foreground:

2451

2460

pidfilename = "/run/mandos.pid"

2452

2461

if not os.path.isdir("/run/."):

2522

2531

use_dbus = False

2523

2532

server_settings["use_dbus"] = False

2524

2533

tcp_server.use_dbus = False

2525

if zeroconf:

2526

protocol = avahi.PROTO_INET6 if use_ipv6 else avahi.PROTO_INET

2527

service = AvahiServiceToSyslog(name =

2528

server_settings["servicename"],

2529

servicetype = "_mandos._tcp",

2530

protocol = protocol, bus = bus)

2531

if server_settings["interface"]:

2532

service.interface = (if_nametoindex

2533

(server_settings["interface"]

2534

.encode("utf-8")))

2534

protocol = avahi.PROTO_INET6 if use_ipv6 else avahi.PROTO_INET

2535

service = AvahiServiceToSyslog(name =

2536

server_settings["servicename"],

2537

servicetype = "_mandos._tcp",

2538

protocol = protocol, bus = bus)

2539

if server_settings["interface"]:

2540

service.interface = (if_nametoindex

2541

(str(server_settings["interface"])))

2535

2542

2536

2543

global multiprocessing_manager

2537

2544

multiprocessing_manager = multiprocessing.Manager()

2561

2568

os.remove(stored_state_path)

2562

2569

except IOError as e:

2563

2570

if e.errno == errno.ENOENT:

2564

logger.warning("Could not load persistent state: {}"

2571

logger.warning("Could not load persistent state: {0}"

2565

2572

.format(os.strerror(e.errno)))

2566

2573

else:

2567

2574

logger.critical("Could not load persistent state:",

2572

2579

"EOFError:", exc_info=e)

2573

2580

2574

2581

with PGPEngine() as pgp:

2575

for client_name, client in clients_data.items():

2582

for client_name, client in clients_data.iteritems():

2576

2583

# Skip removed clients

2577

2584

if client_name not in client_settings:

2578

2585

continue

2603

2610

if datetime.datetime.utcnow() >= client["expires"]:

2604

2611

if not client["last_checked_ok"]:

2605

2612

logger.warning(

2606

"disabling client {} - Client never "

2613

"disabling client {0} - Client never "

2607

2614

"performed a successful checker"

2608

2615

.format(client_name))

2609

2616

client["enabled"] = False

2610

2617

elif client["last_checker_status"] != 0:

2611

2618

logger.warning(

2612

"disabling client {} - Client last"

2613

" checker failed with error code {}"

2619

"disabling client {0} - Client "

2620

"last checker failed with error code {1}"

2614

2621

.format(client_name,

2615

2622

client["last_checker_status"]))

2616

2623

client["enabled"] = False

2619

2626

.utcnow()

2620

2627

+ client["timeout"])

2621

2628

logger.debug("Last checker succeeded,"

2622

" keeping {} enabled"

2629

" keeping {0} enabled"

2623

2630

.format(client_name))

2624

2631

try:

2625

2632

client["secret"] = (

2628

2635

["secret"]))

2629

2636

except PGPError:

2630

2637

# If decryption fails, we use secret from new settings

2631

logger.debug("Failed to decrypt {} old secret"

2638

logger.debug("Failed to decrypt {0} old secret"

2632

2639

.format(client_name))

2633

2640

client["secret"] = (

2634

2641

client_settings[client_name]["secret"])

2642

2649

clients_data[client_name] = client_settings[client_name]

2643

2650

2644

2651

# Create all client objects

2645

for client_name, client in clients_data.items():

2652

for client_name, client in clients_data.iteritems():

2646

2653

tcp_server.clients[client_name] = client_class(

2647

2654

name = client_name, settings = client,

2648

2655

server_settings = server_settings)

2655

2662

try:

2656

2663

with pidfile:

2657

2664

pid = os.getpid()

2658

pidfile.write("{}\n".format(pid).encode("utf-8"))

2665

pidfile.write(str(pid) + "\n".encode("utf-8"))

2659

2666

except IOError:

2660

2667

logger.error("Could not write to file %r with PID %d",

2661

2668

pidfilename, pid)

2731

2738

2732

2739

def cleanup():

2733

2740

"Cleanup function; run on exit"

2734

if zeroconf:

2735

service.cleanup()

2741

service.cleanup()

2736

2742

2737

2743

multiprocessing.active_children()

2738

2744

wnull.close()

2752

2758

2753

2759

# A list of attributes that can not be pickled

2754

2760

# + secret.

2755

exclude = { "bus", "changedstate", "secret",

2756

"checker", "server_settings" }

2761

exclude = set(("bus", "changedstate", "secret",

2762

"checker", "server_settings"))

2757

2763

for name, typ in (inspect.getmembers

2758

2764

(dbus.service.Object)):

2759

2765

exclude.add(name)

2782

2788

except NameError:

2783

2789

pass

2784

2790

if e.errno in (errno.ENOENT, errno.EACCES, errno.EEXIST):

2785

logger.warning("Could not save persistent state: {}"

2791

logger.warning("Could not save persistent state: {0}"

2786

2792

.format(os.strerror(e.errno)))

2787

2793

else:

2788

2794

logger.warning("Could not save persistent state:",

2817

2823

tcp_server.server_activate()

2818

2824

2819

2825

# Find out what port we got

2820

if zeroconf:

2821

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

2826

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

2822

2827

if use_ipv6:

2823

2828

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

2824

2829

" flowinfo %d, scope_id %d",

2830

2835

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

2831

2836

2832

2837

try:

2833

if zeroconf:

2834

# From the Avahi example code

2835

try:

2836

service.activate()

2837

except dbus.exceptions.DBusException as error:

2838

logger.critical("D-Bus Exception", exc_info=error)

2839

cleanup()

2840

sys.exit(1)

2841

# End of Avahi example code

2838

# From the Avahi example code

2839

try:

2840

service.activate()

2841

except dbus.exceptions.DBusException as error:

2842

logger.critical("D-Bus Exception", exc_info=error)

2843

cleanup()

2844

sys.exit(1)

2845

# End of Avahi example code

2842

2846

2843

2847

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

2844

2848

lambda *args, **kwargs: