/mandos/trunk : revision 740

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#!/usr/bin/python

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#!/usr/bin/python2.7

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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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# "AvahiService" class, and some lines in "main".

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#

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# Everything else is

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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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except ImportError:

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SO_BINDTODEVICE = None

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version = "1.6.0"

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if sys.version_info.major == 2:

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str = unicode

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version = "1.6.9"

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stored_state_file = "clients.pickle"

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logger = logging.getLogger()

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syslogger = (logging.handlers.SysLogHandler

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(facility = logging.handlers.SysLogHandler.LOG_DAEMON,

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

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syslogger = None

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try:

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if_nametoindex = (ctypes.cdll.LoadLibrary

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

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interface_index = struct.unpack("I", 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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syslogger.setFormatter(logging.Formatter

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

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' %(message)s'))

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def password_encode(self, password):

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# Passphrase can not be empty and can not contain newlines or

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# NUL bytes. So we prefix it and hex encode it.

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return b"mandos" + binascii.hexlify(password)

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encoded = b"mandos" + binascii.hexlify(password)

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if len(encoded) > 2048:

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# GnuPG can't handle long passwords, so encode differently

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encoded = (b"mandos" + password.replace(b"\\", b"\\\\")

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.replace(b"\n", b"\\n")

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.replace(b"\0", b"\\x00"))

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return encoded

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def encrypt(self, data, password):

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passphrase = self.password_encode(password)

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

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**kwargs)

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class AvahiServiceError(AvahiError):

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pass

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self.bus = bus

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self.entry_group_state_changed_match = None

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def rename(self):

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def rename(self, remove=True):

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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("No suitable Zeroconf service name found"

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" after %i retries, exiting.",

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self.rename_count)

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raise AvahiServiceError("Too many renames")

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self.name = unicode(self.server

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.GetAlternativeServiceName(self.name))

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self.name = str(self.server

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.GetAlternativeServiceName(self.name))

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self.rename_count += 1

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logger.info("Changing Zeroconf service name to %r ...",

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self.name)

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self.remove()

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if remove:

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self.remove()

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try:

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self.add()

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except dbus.exceptions.DBusException as error:

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

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self.cleanup()

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os._exit(1)

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self.rename_count += 1

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if (error.get_dbus_name()

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== "org.freedesktop.Avahi.CollisionError"):

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logger.info("Local Zeroconf service name collision.")

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return self.rename(remove=False)

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else:

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

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self.cleanup()

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os._exit(1)

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def remove(self):

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

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self.rename()

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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: {0!s}"

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str(error))

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

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.format(error))

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def cleanup(self):

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class AvahiServiceToSyslog(AvahiService):

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def rename(self):

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

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

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ret = AvahiService.rename(self)

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ret = AvahiService.rename(self, *args, **kwargs)

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syslogger.setFormatter(logging.Formatter

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

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('Mandos ({}) [%(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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client["enabled"] = config.getboolean(client_name,

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"enabled")

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# Uppercase and remove spaces from fingerprint for later

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# comparison purposes with return value from the

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# fingerprint() function

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client["fingerprint"] = (section["fingerprint"].upper()

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.replace(" ", ""))

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if "secret" in section:

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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 {0}"

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

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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.iteritems():

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for setting, value in settings.items():

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setattr(self, setting, value)

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if self.enabled:

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self.expires = None

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logger.debug("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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logger.debug(" Fingerprint: %s", self.fingerprint)

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self.created = settings.get("created",

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datetime.datetime.utcnow())

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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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(self.interval_milliseconds(),

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(int(self.interval

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.total_seconds() * 1000),

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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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(self.timeout_milliseconds(),

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self.disable))

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(int(self.timeout

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.total_seconds() * 1000),

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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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(timedelta_to_milliseconds

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(timeout), self.disable))

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(int(timeout.total_seconds()

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* 1000), self.disable))

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

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def need_approval(self):

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# If a checker exists, make sure it is not a zombie

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try:

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pid, status = os.waitpid(self.checker.pid, os.WNOHANG)

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except (AttributeError, OSError) as error:

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if (isinstance(error, OSError)

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and error.errno != errno.ECHILD):

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raise error

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except AttributeError:

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pass

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except OSError as error:

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if error.errno != errno.ECHILD:

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raise

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else:

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if pid:

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logger.warning("Checker was a zombie")

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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 = 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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escaped_attrs = { attr:

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

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for attr in 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 {0!r}".format(signature))

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" signature {!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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"""Decorator to annotate D-Bus methods, signals or properties

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Usage:

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@dbus_annotations({"org.freedesktop.DBus.Deprecated": "true",

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"org.freedesktop.DBus.Property."

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"EmitsChangedSignal": "false"})

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@dbus_service_property("org.example.Interface", signature="b",

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access="r")

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@dbus_annotations({{"org.freedesktop.DBus.Deprecated": "true",

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"org.freedesktop.DBus.Property."

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"EmitsChangedSignal": "false"})

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def Property_dbus_property(self):

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return dbus.Boolean(False)

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"""

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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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838

"""

844

def __unicode__(self):

845

return unicode(str(self))

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839

pass

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class DBusPropertyAccessException(DBusPropertyException):

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842

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

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865

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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"""

875

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

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

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False)

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def _get_all_dbus_things(self, thing):

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# The byte_arrays option is not supported yet on

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# signatures other than "ay".

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if prop._dbus_signature != "ay":

930

raise ValueError

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

924

"'ay' signature {!r}"

925

.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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928

prop(value)

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value.variant_level+1)

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return dbus.Dictionary(properties, signature="sv")

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954

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@dbus.service.signal(dbus.PROPERTIES_IFACE, signature="sa{sv}as")

956

def PropertiesChanged(self, interface_name, changed_properties,

957

invalidated_properties):

958

"""Standard D-Bus PropertiesChanged() signal, see D-Bus

959

standard.

960

"""

961

pass

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@dbus.service.method(dbus.INTROSPECTABLE_IFACE,

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964

out_signature="s",

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965

path_keyword='object_path',

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1000

(prop,

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1001

"_dbus_annotations",

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1002

{}))

1000

for name, value in annots.iteritems():

1003

for name, value in annots.items():

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1004

ann_tag = document.createElement(

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1005

"annotation")

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ann_tag.setAttribute("name", name)

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1009

# Add interface annotation tags

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1010

for annotation, value in dict(

1008

1011

itertools.chain.from_iterable(

1009

annotations().iteritems()

1012

annotations().items()

1010

1013

for name, annotations in

1011

1014

self._get_all_dbus_things("interface")

1012

1015

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

1013

)).iteritems():

1016

)).items():

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1017

ann_tag = document.createElement("annotation")

1015

1018

ann_tag.setAttribute("name", annotation)

1016

1019

ann_tag.setAttribute("value", value)

1072

1075

"""

1073

1076

def wrapper(cls):

1074

1077

for orig_interface_name, alt_interface_name in (

1075

alt_interface_names.iteritems()):

1078

alt_interface_names.items()):

1076

1079

attr = {}

1077

1080

interface_names = set()

1078

1081

# Go though all attributes of the class

1195

1198

attribute.func_closure)))

1196

1199

if deprecate:

1197

1200

# Deprecate all alternate interfaces

1198

iname="_AlternateDBusNames_interface_annotation{0}"

1201

iname="_AlternateDBusNames_interface_annotation{}"

1199

1202

for interface_name in interface_names:

1200

1203

@dbus_interface_annotations(interface_name)

1201

1204

def func(self):

1210

1213

if interface_names:

1211

1214

# Replace the class with a new subclass of it with

1212

1215

# methods, signals, etc. as created above.

1213

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

1216

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

1214

1217

(cls,), attr)

1215

1218

return cls

1216

1219

return wrapper

1229

1232

runtime_expansions = (Client.runtime_expansions

1230

1233

+ ("dbus_object_path",))

1231

1234

1235

_interface = "se.recompile.Mandos.Client"

1236

1232

1237

# dbus.service.Object doesn't use super(), so we can't either.

1233

1238

1234

1239

def __init__(self, bus = None, *args, **kwargs):

1236

1241

Client.__init__(self, *args, **kwargs)

1237

1242

# Only now, when this client is initialized, can it show up on

1238

1243

# the D-Bus

1239

client_object_name = unicode(self.name).translate(

1244

client_object_name = str(self.name).translate(

1240

1245

{ord("."): ord("_"),

1241

1246

ord("-"): ord("_")})

1242

1247

self.dbus_object_path = (dbus.ObjectPath

1246

1251

1247

1252

def notifychangeproperty(transform_func,

1248

1253

dbus_name, type_func=lambda x: x,

1249

variant_level=1):

1254

variant_level=1, invalidate_only=False,

1255

_interface=_interface):

1250

1256

""" Modify a variable so that it's a property which announces

1251

1257

its changes to DBus.

1252

1258

1257

1263

to the D-Bus. Default: no transform

1258

1264

variant_level: D-Bus variant level. Default: 1

1259

1265

"""

1260

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

1266

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

1261

1267

def setter(self, value):

1262

1268

if hasattr(self, "dbus_object_path"):

1263

1269

if (not hasattr(self, attrname) or

1264

1270

type_func(getattr(self, attrname, None))

1265

1271

!= type_func(value)):

1266

dbus_value = transform_func(type_func(value),

1267

variant_level

1268

=variant_level)

1269

self.PropertyChanged(dbus.String(dbus_name),

1270

dbus_value)

1272

if invalidate_only:

1273

self.PropertiesChanged(_interface,

1274

dbus.Dictionary(),

1275

dbus.Array

1276

((dbus_name,)))

1277

else:

1278

dbus_value = transform_func(type_func(value),

1279

variant_level

1280

=variant_level)

1281

self.PropertyChanged(dbus.String(dbus_name),

1282

dbus_value)

1283

self.PropertiesChanged(_interface,

1284

dbus.Dictionary({

1285

dbus.String(dbus_name):

1286

dbus_value }), dbus.Array())

1271

1287

setattr(self, attrname, value)

1272

1288

1273

1289

return property(lambda self: getattr(self, attrname), setter)

1293

1309

approval_delay = notifychangeproperty(dbus.UInt64,

1294

1310

"ApprovalDelay",

1295

1311

type_func =

1296

timedelta_to_milliseconds)

1312

lambda td: td.total_seconds()

1313

* 1000)

1297

1314

approval_duration = notifychangeproperty(

1298

1315

dbus.UInt64, "ApprovalDuration",

1299

type_func = timedelta_to_milliseconds)

1316

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

1300

1317

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

1301

1318

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

1302

type_func =

1303

timedelta_to_milliseconds)

1319

type_func = lambda td:

1320

td.total_seconds() * 1000)

1304

1321

extended_timeout = notifychangeproperty(

1305

1322

dbus.UInt64, "ExtendedTimeout",

1306

type_func = timedelta_to_milliseconds)

1323

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

1307

1324

interval = notifychangeproperty(dbus.UInt64,

1308

1325

"Interval",

1309

1326

type_func =

1310

timedelta_to_milliseconds)

1327

lambda td: td.total_seconds()

1328

* 1000)

1311

1329

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

1330

secret = notifychangeproperty(dbus.ByteArray, "Secret",

1331

invalidate_only=True)

1312

1332

1313

1333

del notifychangeproperty

1314

1334

1341

1361

*args, **kwargs)

1342

1362

1343

1363

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

1344

old_checker = self.checker

1345

if self.checker is not None:

1346

old_checker_pid = self.checker.pid

1347

else:

1348

old_checker_pid = None

1364

old_checker_pid = getattr(self.checker, "pid", None)

1349

1365

r = Client.start_checker(self, *args, **kwargs)

1350

1366

# Only if new checker process was started

1351

1367

if (self.checker is not None

1360

1376

1361

1377

def approve(self, value=True):

1362

1378

self.approved = value

1363

gobject.timeout_add(timedelta_to_milliseconds

1364

(self.approval_duration),

1365

self._reset_approved)

1379

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

1380

* 1000), self._reset_approved)

1366

1381

self.send_changedstate()

1367

1382

1368

1383

## D-Bus methods, signals & properties

1369

_interface = "se.recompile.Mandos.Client"

1370

1384

1371

1385

## Interfaces

1372

1386

1373

@dbus_interface_annotations(_interface)

1374

def _foo(self):

1375

return { "org.freedesktop.DBus.Property.EmitsChangedSignal":

1376

"false"}

1377

1378

1387

## Signals

1379

1388

1380

1389

# CheckerCompleted - signal

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1399

pass

1391

1400

1392

1401

# PropertyChanged - signal

1402

@dbus_annotations({"org.freedesktop.DBus.Deprecated": "true"})

1393

1403

@dbus.service.signal(_interface, signature="sv")

1394

1404

def PropertyChanged(self, property, value):

1395

1405

"D-Bus signal"

1471

1481

access="readwrite")

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1482

def ApprovalDelay_dbus_property(self, value=None):

1473

1483

if value is None: # get

1474

return dbus.UInt64(self.approval_delay_milliseconds())

1484

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

1485

* 1000)

1475

1486

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

1476

1487

1477

1488

# ApprovalDuration - property

1479

1490

access="readwrite")

1480

1491

def ApprovalDuration_dbus_property(self, value=None):

1481

1492

if value is None: # get

1482

return dbus.UInt64(timedelta_to_milliseconds(

1483

self.approval_duration))

1493

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

1494

* 1000)

1484

1495

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

1485

1496

1486

1497

# Name - property

1499

1510

def Host_dbus_property(self, value=None):

1500

1511

if value is None: # get

1501

1512

return dbus.String(self.host)

1502

self.host = unicode(value)

1513

self.host = str(value)

1503

1514

1504

1515

# Created - property

1505

1516

@dbus_service_property(_interface, signature="s", access="read")

1552

1563

access="readwrite")

1553

1564

def Timeout_dbus_property(self, value=None):

1554

1565

if value is None: # get

1555

return dbus.UInt64(self.timeout_milliseconds())

1566

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

1556

1567

old_timeout = self.timeout

1557

1568

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

1558

1569

# Reschedule disabling

1569

1580

gobject.source_remove(self.disable_initiator_tag)

1570

1581

self.disable_initiator_tag = (

1571

1582

gobject.timeout_add(

1572

timedelta_to_milliseconds(self.expires - now),

1573

self.disable))

1583

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

1584

* 1000), self.disable))

1574

1585

1575

1586

# ExtendedTimeout - property

1576

1587

@dbus_service_property(_interface, signature="t",

1577

1588

access="readwrite")

1578

1589

def ExtendedTimeout_dbus_property(self, value=None):

1579

1590

if value is None: # get

1580

return dbus.UInt64(self.extended_timeout_milliseconds())

1591

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

1592

* 1000)

1581

1593

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

1582

1594

1583

1595

# Interval - property

1585

1597

access="readwrite")

1586

1598

def Interval_dbus_property(self, value=None):

1587

1599

if value is None: # get

1588

return dbus.UInt64(self.interval_milliseconds())

1600

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

1589

1601

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

1590

1602

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

1591

1603

return

1602

1614

def Checker_dbus_property(self, value=None):

1603

1615

if value is None: # get

1604

1616

return dbus.String(self.checker_command)

1605

self.checker_command = unicode(value)

1617

self.checker_command = str(value)

1606

1618

1607

1619

# CheckerRunning - property

1608

1620

@dbus_service_property(_interface, signature="b",

1624

1636

@dbus_service_property(_interface, signature="ay",

1625

1637

access="write", byte_arrays=True)

1626

1638

def Secret_dbus_property(self, value):

1627

self.secret = str(value)

1639

self.secret = bytes(value)

1628

1640

1629

1641

del _interface

1630

1642

1664

1676

def handle(self):

1665

1677

with contextlib.closing(self.server.child_pipe) as child_pipe:

1666

1678

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

1667

unicode(self.client_address))

1679

str(self.client_address))

1668

1680

logger.debug("Pipe FD: %d",

1669

1681

self.server.child_pipe.fileno())

1670

1682

1696

1708

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

1697

1709

try:

1698

1710

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

1699

raise RuntimeError

1711

raise RuntimeError(line)

1700

1712

except (ValueError, IndexError, RuntimeError) as error:

1701

1713

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

1702

1714

return

1751

1763

if self.server.use_dbus:

1752

1764

# Emit D-Bus signal

1753

1765

client.NeedApproval(

1754

client.approval_delay_milliseconds(),

1755

client.approved_by_default)

1766

client.approval_delay.total_seconds()

1767

* 1000, client.approved_by_default)

1756

1768

else:

1757

1769

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

1758

1770

client.name)

1764

1776

#wait until timeout or approved

1765

1777

time = datetime.datetime.now()

1766

1778

client.changedstate.acquire()

1767

client.changedstate.wait(

1768

float(timedelta_to_milliseconds(delay)

1769

/ 1000))

1779

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

1770

1780

client.changedstate.release()

1771

1781

time2 = datetime.datetime.now()

1772

1782

if (time2 - time) >= delay:

1909

1919

1910

1920

def add_pipe(self, parent_pipe, proc):

1911

1921

"""Dummy function; override as necessary"""

1912

raise NotImplementedError

1922

raise NotImplementedError()

1913

1923

1914

1924

1915

1925

class IPv6_TCPServer(MultiprocessingMixInWithPipe,

1971

1981

try:

1972

1982

self.socket.setsockopt(socket.SOL_SOCKET,

1973

1983

SO_BINDTODEVICE,

1974

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

1984

(self.interface + "\0")

1985

.encode("utf-8"))

1975

1986

except socket.error as error:

1976

1987

if error.errno == errno.EPERM:

1977

1988

logger.error("No permission to bind to"

2180

2191

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

2181

2192

frozenset((token_year, token_month,

2182

2193

token_day, token_time,

2183

token_week))),

2194

token_week)))

2184

2195

# Define starting values

2185

2196

value = datetime.timedelta() # Value so far

2186

2197

found_token = None

2187

followers = frozenset(token_duration,) # Following valid tokens

2198

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

2188

2199

s = duration # String left to parse

2189

2200

# Loop until end token is found

2190

2201

while found_token is not token_end:

2237

2248

timevalue = datetime.timedelta(0)

2238

2249

for s in interval.split():

2239

2250

try:

2240

suffix = unicode(s[-1])

2251

suffix = s[-1]

2241

2252

value = int(s[:-1])

2242

2253

if suffix == "d":

2243

2254

delta = datetime.timedelta(value)

2250

2261

elif suffix == "w":

2251

2262

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

2252

2263

else:

2253

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

2264

raise ValueError("Unknown suffix {!r}"

2254

2265

.format(suffix))

2255

except (ValueError, IndexError) as e:

2266

except IndexError as e:

2256

2267

raise ValueError(*(e.args))

2257

2268

timevalue += delta

2258

2269

return timevalue

2273

2284

# Close all standard open file descriptors

2274

2285

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

2275

2286

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

2276

raise OSError(errno.ENODEV,

2277

"{0} not a character device"

2287

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

2278

2288

.format(os.devnull))

2279

2289

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

2280

2290

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

2290

2300

2291

2301

parser = argparse.ArgumentParser()

2292

2302

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

2293

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

2303

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

2294

2304

help="show version number and exit")

2295

2305

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

2296

2306

help="Bind to interface IF")

2329

2339

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

2330

2340

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

2331

2341

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

2342

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

2343

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

2344

default=None)

2332

2345

2333

2346

options = parser.parse_args()

2334

2347

2335

2348

if options.check:

2336

2349

import doctest

2337

doctest.testmod()

2338

sys.exit()

2350

fail_count, test_count = doctest.testmod()

2351

sys.exit(os.EX_OK if fail_count == 0 else 1)

2339

2352

2340

2353

# Default values for config file for server-global settings

2341

2354

server_defaults = { "interface": "",

2343

2356

"port": "",

2344

2357

"debug": "False",

2345

2358

"priority":

2346

"SECURE256:!CTYPE-X.509:+CTYPE-OPENPGP:+SIGN-RSA-SHA224",

2359

"SECURE256:!CTYPE-X.509:+CTYPE-OPENPGP:+SIGN-RSA-SHA224:+SIGN-RSA-RMD160",

2347

2360

"servicename": "Mandos",

2348

2361

"use_dbus": "True",

2349

2362

"use_ipv6": "True",

2352

2365

"socket": "",

2353

2366

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

2354

2367

"foreground": "False",

2368

"zeroconf": "True",

2355

2369

}

2356

2370

2357

2371

# Parse config file for server-global settings

2384

2398

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

2385

2399

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

2386

2400

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

2387

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

2401

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

2388

2402

value = getattr(options, option)

2389

2403

if value is not None:

2390

2404

server_settings[option] = value

2391

2405

del options

2392

2406

# Force all strings to be unicode

2393

2407

for option in server_settings.keys():

2394

if type(server_settings[option]) is str:

2395

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

2408

if isinstance(server_settings[option], bytes):

2409

server_settings[option] = (server_settings[option]

2410

.decode("utf-8"))

2396

2411

# Force all boolean options to be boolean

2397

2412

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

2398

"foreground"):

2413

"foreground", "zeroconf"):

2399

2414

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

2400

2415

# Debug implies foreground

2401

2416

if server_settings["debug"]:

2404

2419

2405

2420

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

2406

2421

2422

if (not server_settings["zeroconf"] and

2423

not (server_settings["port"]

2424

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

2425

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

2426

" Zeroconf")

2427

2407

2428

# For convenience

2408

2429

debug = server_settings["debug"]

2409

2430

debuglevel = server_settings["debuglevel"]

2412

2433

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

2413

2434

stored_state_file)

2414

2435

foreground = server_settings["foreground"]

2436

zeroconf = server_settings["zeroconf"]

2415

2437

2416

2438

if debug:

2417

2439

initlogger(debug, logging.DEBUG)

2424

2446

2425

2447

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

2426

2448

syslogger.setFormatter(logging.Formatter

2427

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

2449

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

2428

2450

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

2429

2451

.format(server_settings

2430

2452

["servicename"])))

2438

2460

global mandos_dbus_service

2439

2461

mandos_dbus_service = None

2440

2462

2463

socketfd = None

2464

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

2465

socketfd = server_settings["socket"]

2441

2466

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

2442

2467

server_settings["port"]),

2443

2468

ClientHandler,

2447

2472

gnutls_priority=

2448

2473

server_settings["priority"],

2449

2474

use_dbus=use_dbus,

2450

socketfd=(server_settings["socket"]

2451

or None))

2475

socketfd=socketfd)

2452

2476

if not foreground:

2453

pidfilename = "/var/run/mandos.pid"

2477

pidfilename = "/run/mandos.pid"

2478

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

2479

pidfilename = "/var/run/mandos.pid"

2454

2480

pidfile = None

2455

2481

try:

2456

2482

pidfile = open(pidfilename, "w")

2473

2499

os.setuid(uid)

2474

2500

except OSError as error:

2475

2501

if error.errno != errno.EPERM:

2476

raise error

2502

raise

2477

2503

2478

2504

if debug:

2479

2505

# Enable all possible GnuTLS debugging

2522

2548

use_dbus = False

2523

2549

server_settings["use_dbus"] = False

2524

2550

tcp_server.use_dbus = False

2525

protocol = avahi.PROTO_INET6 if use_ipv6 else avahi.PROTO_INET

2526

service = AvahiServiceToSyslog(name =

2527

server_settings["servicename"],

2528

servicetype = "_mandos._tcp",

2529

protocol = protocol, bus = bus)

2530

if server_settings["interface"]:

2531

service.interface = (if_nametoindex

2532

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

2551

if zeroconf:

2552

protocol = avahi.PROTO_INET6 if use_ipv6 else avahi.PROTO_INET

2553

service = AvahiServiceToSyslog(name =

2554

server_settings["servicename"],

2555

servicetype = "_mandos._tcp",

2556

protocol = protocol, bus = bus)

2557

if server_settings["interface"]:

2558

service.interface = (if_nametoindex

2559

(server_settings["interface"]

2560

.encode("utf-8")))

2533

2561

2534

2562

global multiprocessing_manager

2535

2563

multiprocessing_manager = multiprocessing.Manager()

2559

2587

os.remove(stored_state_path)

2560

2588

except IOError as e:

2561

2589

if e.errno == errno.ENOENT:

2562

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

2590

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

2563

2591

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

2564

2592

else:

2565

2593

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

2570

2598

"EOFError:", exc_info=e)

2571

2599

2572

2600

with PGPEngine() as pgp:

2573

for client_name, client in clients_data.iteritems():

2601

for client_name, client in clients_data.items():

2574

2602

# Skip removed clients

2575

2603

if client_name not in client_settings:

2576

2604

continue

2601

2629

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

2602

2630

if not client["last_checked_ok"]:

2603

2631

logger.warning(

2604

"disabling client {0} - Client never "

2632

"disabling client {} - Client never "

2605

2633

"performed a successful checker"

2606

2634

.format(client_name))

2607

2635

client["enabled"] = False

2608

2636

elif client["last_checker_status"] != 0:

2609

2637

logger.warning(

2610

"disabling client {0} - Client "

2611

"last checker failed with error code {1}"

2638

"disabling client {} - Client last"

2639

" checker failed with error code {}"

2612

2640

.format(client_name,

2613

2641

client["last_checker_status"]))

2614

2642

client["enabled"] = False

2617

2645

.utcnow()

2618

2646

+ client["timeout"])

2619

2647

logger.debug("Last checker succeeded,"

2620

" keeping {0} enabled"

2648

" keeping {} enabled"

2621

2649

.format(client_name))

2622

2650

try:

2623

2651

client["secret"] = (

2626

2654

["secret"]))

2627

2655

except PGPError:

2628

2656

# If decryption fails, we use secret from new settings

2629

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

2657

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

2630

2658

.format(client_name))

2631

2659

client["secret"] = (

2632

2660

client_settings[client_name]["secret"])

2640

2668

clients_data[client_name] = client_settings[client_name]

2641

2669

2642

2670

# Create all client objects

2643

for client_name, client in clients_data.iteritems():

2671

for client_name, client in clients_data.items():

2644

2672

tcp_server.clients[client_name] = client_class(

2645

2673

name = client_name, settings = client,

2646

2674

server_settings = server_settings)

2653

2681

try:

2654

2682

with pidfile:

2655

2683

pid = os.getpid()

2656

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

2684

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

2657

2685

except IOError:

2658

2686

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

2659

2687

pidfilename, pid)

2705

2733

def GetAllClientsWithProperties(self):

2706

2734

"D-Bus method"

2707

2735

return dbus.Dictionary(

2708

((c.dbus_object_path, c.GetAll(""))

2709

for c in tcp_server.clients.itervalues()),

2736

{ c.dbus_object_path: c.GetAll("")

2737

for c in tcp_server.clients.itervalues() },

2710

2738

signature="oa{sv}")

2711

2739

2712

2740

@dbus.service.method(_interface, in_signature="o")

2729

2757

2730

2758

def cleanup():

2731

2759

"Cleanup function; run on exit"

2732

service.cleanup()

2760

if zeroconf:

2761

service.cleanup()

2733

2762

2734

2763

multiprocessing.active_children()

2735

2764

wnull.close()

2749

2778

2750

2779

# A list of attributes that can not be pickled

2751

2780

# + secret.

2752

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

2753

"checker", "server_settings"))

2781

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

2782

"checker", "server_settings" }

2754

2783

for name, typ in (inspect.getmembers

2755

2784

(dbus.service.Object)):

2756

2785

exclude.add(name)

2779

2808

except NameError:

2780

2809

pass

2781

2810

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

2782

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

2811

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

2783

2812

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

2784

2813

else:

2785

2814

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

2786

2815

exc_info=e)

2787

raise e

2816

raise

2788

2817

2789

2818

# Delete all clients, and settings from config

2790

2819

while tcp_server.clients:

2814

2843

tcp_server.server_activate()

2815

2844

2816

2845

# Find out what port we got

2817

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

2846

if zeroconf:

2847

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

2818

2848

if use_ipv6:

2819

2849

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

2820

2850

" flowinfo %d, scope_id %d",

2826

2856

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

2827

2857

2828

2858

try:

2829

# From the Avahi example code

2830

try:

2831

service.activate()

2832

except dbus.exceptions.DBusException as error:

2833

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

2834

cleanup()

2835

sys.exit(1)

2836

# End of Avahi example code

2859

if zeroconf:

2860

# From the Avahi example code

2861

try:

2862

service.activate()

2863

except dbus.exceptions.DBusException as error:

2864

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

2865

cleanup()

2866

sys.exit(1)

2867

# End of Avahi example code

2837

2868

2838

2869

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

2839

2870

lambda *args, **kwargs: