/mandos/trunk : revision 624

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#!/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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# "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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if sys.version_info.major == 2:

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str = unicode

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version = "1.6.9"

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version = "1.6.0"

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stored_state_file = "clients.pickle"

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logger = logging.getLogger()

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syslogger = None

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

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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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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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self.bus = bus

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self.entry_group_state_changed_match = None

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def rename(self, remove=True):

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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("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 = str(self.server

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.GetAlternativeServiceName(self.name))

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self.rename_count += 1

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self.name = unicode(self.server

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.GetAlternativeServiceName(self.name))

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

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self.name)

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if remove:

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self.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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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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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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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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str(error))

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

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unicode(error))

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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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class AvahiServiceToSyslog(AvahiService):

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

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def rename(self):

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

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

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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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404

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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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# 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)

682

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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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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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 = { 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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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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"""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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"""

839

pass

844

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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# 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":

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

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"'ay' signature {!r}"

925

.format(prop._dbus_signature))

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raise ValueError

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

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for byte in value))

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prop(value)

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value.variant_level+1)

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

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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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out_signature="s",

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path_keyword='object_path',

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(prop,

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"_dbus_annotations",

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{}))

1003

for name, value in annots.items():

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for name, value in annots.iteritems():

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1001

ann_tag = document.createElement(

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1002

"annotation")

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1003

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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1008

itertools.chain.from_iterable(

1012

annotations().items()

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annotations().iteritems()

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1010

for name, annotations in

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1011

self._get_all_dbus_things("interface")

1015

1012

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

1016

)).items():

1013

)).iteritems():

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1014

ann_tag = document.createElement("annotation")

1018

1015

ann_tag.setAttribute("name", annotation)

1019

1016

ann_tag.setAttribute("value", value)

1075

1072

"""

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1073

def wrapper(cls):

1077

1074

for orig_interface_name, alt_interface_name in (

1078

alt_interface_names.items()):

1075

alt_interface_names.iteritems()):

1079

1076

attr = {}

1080

1077

interface_names = set()

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1078

# Go though all attributes of the class

1198

1195

attribute.func_closure)))

1199

1196

if deprecate:

1200

1197

# Deprecate all alternate interfaces

1201

iname="_AlternateDBusNames_interface_annotation{}"

1198

iname="_AlternateDBusNames_interface_annotation{0}"

1202

1199

for interface_name in interface_names:

1203

1200

@dbus_interface_annotations(interface_name)

1204

1201

def func(self):

1213

1210

if interface_names:

1214

1211

# Replace the class with a new subclass of it with

1215

1212

# methods, signals, etc. as created above.

1216

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

1213

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

1217

1214

(cls,), attr)

1218

1215

return cls

1219

1216

return wrapper

1232

1229

runtime_expansions = (Client.runtime_expansions

1233

1230

+ ("dbus_object_path",))

1234

1231

1235

_interface = "se.recompile.Mandos.Client"

1236

1237

1232

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

1238

1233

1239

1234

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

1241

1236

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

1242

1237

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

1243

1238

# the D-Bus

1244

client_object_name = str(self.name).translate(

1239

client_object_name = unicode(self.name).translate(

1245

1240

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

1246

1241

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

1247

1242

self.dbus_object_path = (dbus.ObjectPath

1251

1246

1252

1247

def notifychangeproperty(transform_func,

1253

1248

dbus_name, type_func=lambda x: x,

1254

variant_level=1, invalidate_only=False,

1255

_interface=_interface):

1249

variant_level=1):

1256

1250

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

1257

1251

its changes to DBus.

1258

1252

1263

1257

to the D-Bus. Default: no transform

1264

1258

variant_level: D-Bus variant level. Default: 1

1265

1259

"""

1266

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

1260

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

1267

1261

def setter(self, value):

1268

1262

if hasattr(self, "dbus_object_path"):

1269

1263

if (not hasattr(self, attrname) or

1270

1264

type_func(getattr(self, attrname, None))

1271

1265

!= type_func(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())

1266

dbus_value = transform_func(type_func(value),

1267

variant_level

1268

=variant_level)

1269

self.PropertyChanged(dbus.String(dbus_name),

1270

dbus_value)

1287

1271

setattr(self, attrname, value)

1288

1272

1289

1273

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

1309

1293

approval_delay = notifychangeproperty(dbus.UInt64,

1310

1294

"ApprovalDelay",

1311

1295

type_func =

1312

lambda td: td.total_seconds()

1313

* 1000)

1296

timedelta_to_milliseconds)

1314

1297

approval_duration = notifychangeproperty(

1315

1298

dbus.UInt64, "ApprovalDuration",

1316

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

1299

type_func = timedelta_to_milliseconds)

1317

1300

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

1318

1301

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

1319

type_func = lambda td:

1320

td.total_seconds() * 1000)

1302

type_func =

1303

timedelta_to_milliseconds)

1321

1304

extended_timeout = notifychangeproperty(

1322

1305

dbus.UInt64, "ExtendedTimeout",

1323

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

1306

type_func = timedelta_to_milliseconds)

1324

1307

interval = notifychangeproperty(dbus.UInt64,

1325

1308

"Interval",

1326

1309

type_func =

1327

lambda td: td.total_seconds()

1328

* 1000)

1310

timedelta_to_milliseconds)

1329

1311

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

1330

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

1331

invalidate_only=True)

1332

1312

1333

1313

del notifychangeproperty

1334

1314

1361

1341

*args, **kwargs)

1362

1342

1363

1343

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

1364

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

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

1365

1349

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

1366

1350

# Only if new checker process was started

1367

1351

if (self.checker is not None

1376

1360

1377

1361

def approve(self, value=True):

1378

1362

self.approved = value

1379

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

1380

* 1000), self._reset_approved)

1363

gobject.timeout_add(timedelta_to_milliseconds

1364

(self.approval_duration),

1365

self._reset_approved)

1381

1366

self.send_changedstate()

1382

1367

1383

1368

## D-Bus methods, signals & properties

1369

_interface = "se.recompile.Mandos.Client"

1384

1370

1385

1371

## Interfaces

1386

1372

1373

@dbus_interface_annotations(_interface)

1374

def _foo(self):

1375

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

1376

"false"}

1377

1387

1378

## Signals

1388

1379

1389

1380

# CheckerCompleted - signal

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1390

pass

1400

1391

1401

1392

# PropertyChanged - signal

1402

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

1403

1393

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

1404

1394

def PropertyChanged(self, property, value):

1405

1395

"D-Bus signal"

1481

1471

access="readwrite")

1482

1472

def ApprovalDelay_dbus_property(self, value=None):

1483

1473

if value is None: # get

1484

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

1485

* 1000)

1474

return dbus.UInt64(self.approval_delay_milliseconds())

1486

1475

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

1487

1476

1488

1477

# ApprovalDuration - property

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1479

access="readwrite")

1491

1480

def ApprovalDuration_dbus_property(self, value=None):

1492

1481

if value is None: # get

1493

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

1494

* 1000)

1482

return dbus.UInt64(timedelta_to_milliseconds(

1483

self.approval_duration))

1495

1484

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

1496

1485

1497

1486

# Name - property

1510

1499

def Host_dbus_property(self, value=None):

1511

1500

if value is None: # get

1512

1501

return dbus.String(self.host)

1513

self.host = str(value)

1502

self.host = unicode(value)

1514

1503

1515

1504

# Created - property

1516

1505

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

1563

1552

access="readwrite")

1564

1553

def Timeout_dbus_property(self, value=None):

1565

1554

if value is None: # get

1566

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

1555

return dbus.UInt64(self.timeout_milliseconds())

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1556

old_timeout = self.timeout

1568

1557

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

1569

1558

# Reschedule disabling

1580

1569

gobject.source_remove(self.disable_initiator_tag)

1581

1570

self.disable_initiator_tag = (

1582

1571

gobject.timeout_add(

1583

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

1584

* 1000), self.disable))

1572

timedelta_to_milliseconds(self.expires - now),

1573

self.disable))

1585

1574

1586

1575

# ExtendedTimeout - property

1587

1576

@dbus_service_property(_interface, signature="t",

1588

1577

access="readwrite")

1589

1578

def ExtendedTimeout_dbus_property(self, value=None):

1590

1579

if value is None: # get

1591

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

1592

* 1000)

1580

return dbus.UInt64(self.extended_timeout_milliseconds())

1593

1581

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

1594

1582

1595

1583

# Interval - property

1597

1585

access="readwrite")

1598

1586

def Interval_dbus_property(self, value=None):

1599

1587

if value is None: # get

1600

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

1588

return dbus.UInt64(self.interval_milliseconds())

1601

1589

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

1602

1590

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

1603

1591

return

1614

1602

def Checker_dbus_property(self, value=None):

1615

1603

if value is None: # get

1616

1604

return dbus.String(self.checker_command)

1617

self.checker_command = str(value)

1605

self.checker_command = unicode(value)

1618

1606

1619

1607

# CheckerRunning - property

1620

1608

@dbus_service_property(_interface, signature="b",

1636

1624

@dbus_service_property(_interface, signature="ay",

1637

1625

access="write", byte_arrays=True)

1638

1626

def Secret_dbus_property(self, value):

1639

self.secret = bytes(value)

1627

self.secret = str(value)

1640

1628

1641

1629

del _interface

1642

1630

1676

1664

def handle(self):

1677

1665

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

1678

1666

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

1679

str(self.client_address))

1667

unicode(self.client_address))

1680

1668

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

1681

1669

self.server.child_pipe.fileno())

1682

1670

1708

1696

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

1709

1697

try:

1710

1698

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

1711

raise RuntimeError(line)

1699

raise RuntimeError

1712

1700

except (ValueError, IndexError, RuntimeError) as error:

1713

1701

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

1714

1702

return

1763

1751

if self.server.use_dbus:

1764

1752

# Emit D-Bus signal

1765

1753

client.NeedApproval(

1766

client.approval_delay.total_seconds()

1767

* 1000, client.approved_by_default)

1754

client.approval_delay_milliseconds(),

1755

client.approved_by_default)

1768

1756

else:

1769

1757

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

1770

1758

client.name)

1776

1764

#wait until timeout or approved

1777

1765

time = datetime.datetime.now()

1778

1766

client.changedstate.acquire()

1779

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

1767

client.changedstate.wait(

1768

float(timedelta_to_milliseconds(delay)

1769

/ 1000))

1780

1770

client.changedstate.release()

1781

1771

time2 = datetime.datetime.now()

1782

1772

if (time2 - time) >= delay:

1919

1909

1920

1910

def add_pipe(self, parent_pipe, proc):

1921

1911

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

1922

raise NotImplementedError()

1912

raise NotImplementedError

1923

1913

1924

1914

1925

1915

class IPv6_TCPServer(MultiprocessingMixInWithPipe,

1981

1971

try:

1982

1972

self.socket.setsockopt(socket.SOL_SOCKET,

1983

1973

SO_BINDTODEVICE,

1984

(self.interface + "\0")

1985

.encode("utf-8"))

1974

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

1986

1975

except socket.error as error:

1987

1976

if error.errno == errno.EPERM:

1988

1977

logger.error("No permission to bind to"

2191

2180

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

2192

2181

frozenset((token_year, token_month,

2193

2182

token_day, token_time,

2194

token_week)))

2183

token_week))),

2195

2184

# Define starting values

2196

2185

value = datetime.timedelta() # Value so far

2197

2186

found_token = None

2198

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

2187

followers = frozenset(token_duration,) # Following valid tokens

2199

2188

s = duration # String left to parse

2200

2189

# Loop until end token is found

2201

2190

while found_token is not token_end:

2248

2237

timevalue = datetime.timedelta(0)

2249

2238

for s in interval.split():

2250

2239

try:

2251

suffix = s[-1]

2240

suffix = unicode(s[-1])

2252

2241

value = int(s[:-1])

2253

2242

if suffix == "d":

2254

2243

delta = datetime.timedelta(value)

2261

2250

elif suffix == "w":

2262

2251

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

2263

2252

else:

2264

raise ValueError("Unknown suffix {!r}"

2253

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

2265

2254

.format(suffix))

2266

except IndexError as e:

2255

except (ValueError, IndexError) as e:

2267

2256

raise ValueError(*(e.args))

2268

2257

timevalue += delta

2269

2258

return timevalue

2284

2273

# Close all standard open file descriptors

2285

2274

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

2286

2275

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

2287

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

2276

raise OSError(errno.ENODEV,

2277

"{0} not a character device"

2288

2278

.format(os.devnull))

2289

2279

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

2290

2280

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

2300

2290

2301

2291

parser = argparse.ArgumentParser()

2302

2292

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

2303

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

2293

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

2304

2294

help="show version number and exit")

2305

2295

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

2306

2296

help="Bind to interface IF")

2339

2329

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

2340

2330

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

2341

2331

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)

2345

2332

2346

2333

options = parser.parse_args()

2347

2334

2348

2335

if options.check:

2349

2336

import doctest

2350

fail_count, test_count = doctest.testmod()

2351

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

2337

doctest.testmod()

2338

sys.exit()

2352

2339

2353

2340

# Default values for config file for server-global settings

2354

2341

server_defaults = { "interface": "",

2356

2343

"port": "",

2357

2344

"debug": "False",

2358

2345

"priority":

2359

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

2346

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

2360

2347

"servicename": "Mandos",

2361

2348

"use_dbus": "True",

2362

2349

"use_ipv6": "True",

2365

2352

"socket": "",

2366

2353

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

2367

2354

"foreground": "False",

2368

"zeroconf": "True",

2369

2355

}

2370

2356

2371

2357

# Parse config file for server-global settings

2398

2384

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

2399

2385

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

2400

2386

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

2401

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

2387

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

2402

2388

value = getattr(options, option)

2403

2389

if value is not None:

2404

2390

server_settings[option] = value

2405

2391

del options

2406

2392

# Force all strings to be unicode

2407

2393

for option in server_settings.keys():

2408

if isinstance(server_settings[option], bytes):

2409

server_settings[option] = (server_settings[option]

2410

.decode("utf-8"))

2394

if type(server_settings[option]) is str:

2395

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

2411

2396

# Force all boolean options to be boolean

2412

2397

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

2413

"foreground", "zeroconf"):

2398

"foreground"):

2414

2399

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

2415

2400

# Debug implies foreground

2416

2401

if server_settings["debug"]:

2419

2404

2420

2405

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

2421

2406

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

2428

2407

# For convenience

2429

2408

debug = server_settings["debug"]

2430

2409

debuglevel = server_settings["debuglevel"]

2433

2412

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

2434

2413

stored_state_file)

2435

2414

foreground = server_settings["foreground"]

2436

zeroconf = server_settings["zeroconf"]

2437

2415

2438

2416

if debug:

2439

2417

initlogger(debug, logging.DEBUG)

2446

2424

2447

2425

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

2448

2426

syslogger.setFormatter(logging.Formatter

2449

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

2427

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

2450

2428

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

2451

2429

.format(server_settings

2452

2430

["servicename"])))

2460

2438

global mandos_dbus_service

2461

2439

mandos_dbus_service = None

2462

2440

2463

socketfd = None

2464

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

2465

socketfd = server_settings["socket"]

2466

2441

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

2467

2442

server_settings["port"]),

2468

2443

ClientHandler,

2472

2447

gnutls_priority=

2473

2448

server_settings["priority"],

2474

2449

use_dbus=use_dbus,

2475

socketfd=socketfd)

2450

socketfd=(server_settings["socket"]

2451

or None))

2476

2452

if not foreground:

2477

pidfilename = "/run/mandos.pid"

2478

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

2479

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

2453

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

2480

2454

pidfile = None

2481

2455

try:

2482

2456

pidfile = open(pidfilename, "w")

2499

2473

os.setuid(uid)

2500

2474

except OSError as error:

2501

2475

if error.errno != errno.EPERM:

2502

raise

2476

raise error

2503

2477

2504

2478

if debug:

2505

2479

# Enable all possible GnuTLS debugging

2548

2522

use_dbus = False

2549

2523

server_settings["use_dbus"] = False

2550

2524

tcp_server.use_dbus = False

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")))

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"])))

2561

2533

2562

2534

global multiprocessing_manager

2563

2535

multiprocessing_manager = multiprocessing.Manager()

2587

2559

os.remove(stored_state_path)

2588

2560

except IOError as e:

2589

2561

if e.errno == errno.ENOENT:

2590

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

2562

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

2591

2563

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

2592

2564

else:

2593

2565

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

2598

2570

"EOFError:", exc_info=e)

2599

2571

2600

2572

with PGPEngine() as pgp:

2601

for client_name, client in clients_data.items():

2573

for client_name, client in clients_data.iteritems():

2602

2574

# Skip removed clients

2603

2575

if client_name not in client_settings:

2604

2576

continue

2629

2601

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

2630

2602

if not client["last_checked_ok"]:

2631

2603

logger.warning(

2632

"disabling client {} - Client never "

2604

"disabling client {0} - Client never "

2633

2605

"performed a successful checker"

2634

2606

.format(client_name))

2635

2607

client["enabled"] = False

2636

2608

elif client["last_checker_status"] != 0:

2637

2609

logger.warning(

2638

"disabling client {} - Client last"

2639

" checker failed with error code {}"

2610

"disabling client {0} - Client "

2611

"last checker failed with error code {1}"

2640

2612

.format(client_name,

2641

2613

client["last_checker_status"]))

2642

2614

client["enabled"] = False

2645

2617

.utcnow()

2646

2618

+ client["timeout"])

2647

2619

logger.debug("Last checker succeeded,"

2648

" keeping {} enabled"

2620

" keeping {0} enabled"

2649

2621

.format(client_name))

2650

2622

try:

2651

2623

client["secret"] = (

2654

2626

["secret"]))

2655

2627

except PGPError:

2656

2628

# If decryption fails, we use secret from new settings

2657

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

2629

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

2658

2630

.format(client_name))

2659

2631

client["secret"] = (

2660

2632

client_settings[client_name]["secret"])

2668

2640

clients_data[client_name] = client_settings[client_name]

2669

2641

2670

2642

# Create all client objects

2671

for client_name, client in clients_data.items():

2643

for client_name, client in clients_data.iteritems():

2672

2644

tcp_server.clients[client_name] = client_class(

2673

2645

name = client_name, settings = client,

2674

2646

server_settings = server_settings)

2681

2653

try:

2682

2654

with pidfile:

2683

2655

pid = os.getpid()

2684

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

2656

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

2685

2657

except IOError:

2686

2658

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

2687

2659

pidfilename, pid)

2733

2705

def GetAllClientsWithProperties(self):

2734

2706

"D-Bus method"

2735

2707

return dbus.Dictionary(

2736

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

2737

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

2708

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

2709

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

2738

2710

signature="oa{sv}")

2739

2711

2740

2712

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

2757

2729

2758

2730

def cleanup():

2759

2731

"Cleanup function; run on exit"

2760

if zeroconf:

2761

service.cleanup()

2732

service.cleanup()

2762

2733

2763

2734

multiprocessing.active_children()

2764

2735

wnull.close()

2778

2749

2779

2750

# A list of attributes that can not be pickled

2780

2751

# + secret.

2781

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

2782

"checker", "server_settings" }

2752

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

2753

"checker", "server_settings"))

2783

2754

for name, typ in (inspect.getmembers

2784

2755

(dbus.service.Object)):

2785

2756

exclude.add(name)

2808

2779

except NameError:

2809

2780

pass

2810

2781

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

2811

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

2782

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

2812

2783

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

2813

2784

else:

2814

2785

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

2815

2786

exc_info=e)

2816

raise

2787

raise e

2817

2788

2818

2789

# Delete all clients, and settings from config

2819

2790

while tcp_server.clients:

2843

2814

tcp_server.server_activate()

2844

2815

2845

2816

# Find out what port we got

2846

if zeroconf:

2847

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

2817

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

2848

2818

if use_ipv6:

2849

2819

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

2850

2820

" flowinfo %d, scope_id %d",

2856

2826

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

2857

2827

2858

2828

try:

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

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

2868

2837

2869

2838

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

2870

2839

lambda *args, **kwargs: