/mandos/trunk : revision 576

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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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import types

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import binascii

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import tempfile

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import itertools

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import dbus

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import dbus.service

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except ImportError:

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SO_BINDTODEVICE = None

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version = "1.4.1"

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version = "1.5.3"

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stored_state_file = "clients.pickle"

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logger = logging.getLogger()

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self.gnupg.options.meta_interactive = False

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self.gnupg.options.homedir = self.tempdir

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self.gnupg.options.extra_args.extend(['--force-mdc',

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'--quiet'])

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'--quiet',

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'--no-use-agent'])

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def __enter__(self):

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return self

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def encrypt(self, data, password):

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self.gnupg.passphrase = self.password_encode(password)

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with open(os.devnull) as devnull:

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with open(os.devnull, "w") as devnull:

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try:

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proc = self.gnupg.run(['--symmetric'],

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create_fhs=['stdin', 'stdout'],

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def decrypt(self, data, password):

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self.gnupg.passphrase = self.password_encode(password)

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with open(os.devnull) as devnull:

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with open(os.devnull, "w") as devnull:

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try:

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proc = self.gnupg.run(['--decrypt'],

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create_fhs=['stdin', 'stdout'],

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attach_fhs={'stderr': devnull})

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with contextlib.closing(proc.handles['stdin'] ) as f:

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with contextlib.closing(proc.handles['stdin']) as f:

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f.write(data)

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with contextlib.closing(proc.handles['stdout']) as f:

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decrypted_plaintext = f.read()

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return decrypted_plaintext

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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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server: D-Bus Server

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bus: dbus.SystemBus()

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"""

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

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servicetype = None, port = None, TXT = None,

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domain = "", host = "", max_renames = 32768,

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self.server = None

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

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if self.rename_count >= self.max_renames:

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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("DBusException: %s", 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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def remove(self):

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

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if self.entry_group_state_changed_match is not None:

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self.entry_group_state_changed_match = None

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if self.group is not None:

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self.group.Reset()

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def add(self):

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

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self.remove()

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dbus.UInt16(self.port),

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avahi.string_array_to_txt_array(self.TXT))

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self.group.Commit()

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def entry_group_state_changed(self, state, error):

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

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logger.debug("Avahi entry group state change: %i", state)

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elif state == avahi.ENTRY_GROUP_FAILURE:

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

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unicode(error))

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raise AvahiGroupError("State changed: %s"

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

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if self.group is not None:

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pass

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self.group = None

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self.remove()

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def server_state_changed(self, state, error=None):

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

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

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logger.debug("Unknown state: %r", state)

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else:

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logger.debug("Unknown state: %r: %r", state, error)

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def activate(self):

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

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if self.server is None:

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

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ret = AvahiService.rename(self)

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syslogger.setFormatter(logging.Formatter

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

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

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% self.name))

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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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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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last_checked_ok: datetime.datetime(); (UTC) or None

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last_checker_status: integer between 0 and 255 reflecting exit

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status of last checker. -1 reflects crashed

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checker, or None.

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checker, -2 means no checker completed yet.

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last_enabled: datetime.datetime(); (UTC) or None

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name: string; from the config file, used in log messages and

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D-Bus identifiers

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

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timeout: datetime.timedelta(); How long from last_checked_ok

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until this client is disabled

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extended_timeout: extra long timeout when password has been sent

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extended_timeout: extra long timeout when secret has been sent

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runtime_expansions: Allowed attributes for runtime expansion.

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expires: datetime.datetime(); time (UTC) when a client will be

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disabled, or None

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

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{ client_name: {setting_name: value, ...}, ...}

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with exceptions for any special settings as defined above"""

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with exceptions for any special settings as defined above.

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NOTE: Must be a pure function. Must return the same result

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value given the same arguments.

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"""

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settings = {}

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for client_name in config.sections():

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section = dict(config.items(client_name))

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# Reformat values from string types to Python types

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client["approved_by_default"] = config.getboolean(

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client_name, "approved_by_default")

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client["enabled"] = config.getboolean(client_name, "enabled")

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client["enabled"] = config.getboolean(client_name,

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"enabled")

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

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.replace(" ", ""))

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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 %s"

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% 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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section["extended_timeout"])

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client["checker_command"] = section["checker"]

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client["last_approval_request"] = None

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client["last_checked_ok"] = None

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client["last_checker_status"] = None

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if client["enabled"]:

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client["last_enabled"] = datetime.datetime.utcnow()

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client["expires"] = (datetime.datetime.utcnow()

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+ client["timeout"])

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else:

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client["last_enabled"] = None

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client["expires"] = None

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client["last_checker_status"] = -2

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return settings

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def __init__(self, settings, name = None):

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

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

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attribute."""

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self.name = name

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# adding all client settings

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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 not hasattr(self, "last_enabled"):

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self.last_enabled = datetime.datetime.utcnow()

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if not hasattr(self, "expires"):

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

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+ self.timeout)

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else:

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self.last_enabled = None

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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", datetime.datetime.utcnow())

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

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datetime.datetime.utcnow())

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# attributes specific for this server instance

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self.checker = None

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self.checker_initiator_tag = None

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logger.warning("Checker for %(name)s crashed?",

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vars(self))

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def checked_ok(self, timeout=None):

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"""Bump up the timeout for this client.

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This should only be called when the client has been seen,

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alive and well.

625

"""

633

def checked_ok(self):

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"""Assert that the client has been seen, alive and well."""

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self.last_checked_ok = datetime.datetime.utcnow()

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self.last_checker_status = 0

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self.bump_timeout()

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def bump_timeout(self, timeout=None):

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"""Bump up the timeout for this client."""

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if timeout is None:

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timeout = self.timeout

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self.last_checked_ok = datetime.datetime.utcnow()

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

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try:

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command = self.checker_command % escaped_attrs

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except TypeError as error:

685

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

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' %s', self.checker_command, error)

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

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self.checker_command, exc_info=error)

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return True # Try again later

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self.current_checker_command = command

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try:

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gobject.source_remove(self.checker_callback_tag)

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self.checker_callback(pid, status, command)

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except OSError as error:

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logger.error("Failed to start subprocess: %s",

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error)

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logger.error("Failed to start subprocess",

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exc_info=error)

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# Re-run this periodically if run by gobject.timeout_add

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return True

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return

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

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try:

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os.kill(self.checker.pid, signal.SIGTERM)

738

self.checker.terminate()

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739

#time.sleep(0.5)

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#if self.checker.poll() is None:

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# os.kill(self.checker.pid, signal.SIGKILL)

741

# self.checker.kill()

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except OSError as error:

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

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raise

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761

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

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if byte_arrays and signature != "ay":

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763

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

750

" signature %r" % signature)

764

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

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765

def decorator(func):

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766

func._dbus_is_property = True

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767

func._dbus_interface = dbus_interface

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775

return decorator

762

776

763

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def dbus_interface_annotations(dbus_interface):

779

"""Decorator for marking functions returning interface annotations

780

781

Usage:

782

783

@dbus_interface_annotations("org.example.Interface")

784

def _foo(self): # Function name does not matter

785

return {"org.freedesktop.DBus.Deprecated": "true",

786

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

787

"false"}

788

"""

789

def decorator(func):

790

func._dbus_is_interface = True

791

func._dbus_interface = dbus_interface

792

func._dbus_name = dbus_interface

793

return func

794

return decorator

795

796

797

def dbus_annotations(annotations):

798

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

799

Usage:

800

801

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

802

access="r")

803

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

804

"org.freedesktop.DBus.Property."

805

"EmitsChangedSignal": "false"})

806

def Property_dbus_property(self):

807

return dbus.Boolean(False)

808

"""

809

def decorator(func):

810

func._dbus_annotations = annotations

811

return func

812

return decorator

813

814

764

815

class DBusPropertyException(dbus.exceptions.DBusException):

765

816

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

766

817

"""

789

840

"""

790

841

791

842

@staticmethod

792

def _is_dbus_property(obj):

793

return getattr(obj, "_dbus_is_property", False)

843

def _is_dbus_thing(thing):

844

"""Returns a function testing if an attribute is a D-Bus thing

845

846

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

847

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

848

"""

849

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

850

False)

794

851

795

def _get_all_dbus_properties(self):

852

def _get_all_dbus_things(self, thing):

796

853

"""Returns a generator of (name, attribute) pairs

797

854

"""

798

return ((prop.__get__(self)._dbus_name, prop.__get__(self))

855

return ((getattr(athing.__get__(self), "_dbus_name",

856

name),

857

athing.__get__(self))

799

858

for cls in self.__class__.__mro__

800

for name, prop in

801

inspect.getmembers(cls, self._is_dbus_property))

859

for name, athing in

860

inspect.getmembers(cls,

861

self._is_dbus_thing(thing)))

802

862

803

863

def _get_dbus_property(self, interface_name, property_name):

804

864

"""Returns a bound method if one exists which is a D-Bus

806

866

"""

807

867

for cls in self.__class__.__mro__:

808

868

for name, value in (inspect.getmembers

809

(cls, self._is_dbus_property)):

869

(cls,

870

self._is_dbus_thing("property"))):

810

871

if (value._dbus_name == property_name

811

872

and value._dbus_interface == interface_name):

812

873

return value.__get__(self)

841

902

# signatures other than "ay".

842

903

if prop._dbus_signature != "ay":

843

904

raise ValueError

844

value = dbus.ByteArray(''.join(unichr(byte)

845

for byte in value))

905

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

906

for byte in value))

846

907

prop(value)

847

908

848

909

@dbus.service.method(dbus.PROPERTIES_IFACE, in_signature="s",

854

915

Note: Will not include properties with access="write".

855

916

"""

856

917

properties = {}

857

for name, prop in self._get_all_dbus_properties():

918

for name, prop in self._get_all_dbus_things("property"):

858

919

if (interface_name

859

920

and interface_name != prop._dbus_interface):

860

921

# Interface non-empty but did not match

875

936

path_keyword='object_path',

876

937

connection_keyword='connection')

877

938

def Introspect(self, object_path, connection):

878

"""Standard D-Bus method, overloaded to insert property tags.

939

"""Overloading of standard D-Bus method.

940

941

Inserts property tags and interface annotation tags.

879

942

"""

880

943

xmlstring = dbus.service.Object.Introspect(self, object_path,

881

944

connection)

888

951

e.setAttribute("access", prop._dbus_access)

889

952

return e

890

953

for if_tag in document.getElementsByTagName("interface"):

954

# Add property tags

891

955

for tag in (make_tag(document, name, prop)

892

956

for name, prop

893

in self._get_all_dbus_properties()

957

in self._get_all_dbus_things("property")

894

958

if prop._dbus_interface

895

959

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

896

960

if_tag.appendChild(tag)

961

# Add annotation tags

962

for typ in ("method", "signal", "property"):

963

for tag in if_tag.getElementsByTagName(typ):

964

annots = dict()

965

for name, prop in (self.

966

_get_all_dbus_things(typ)):

967

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

968

and prop._dbus_interface

969

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

970

annots.update(getattr

971

(prop,

972

"_dbus_annotations",

973

{}))

974

for name, value in annots.iteritems():

975

ann_tag = document.createElement(

976

"annotation")

977

ann_tag.setAttribute("name", name)

978

ann_tag.setAttribute("value", value)

979

tag.appendChild(ann_tag)

980

# Add interface annotation tags

981

for annotation, value in dict(

982

itertools.chain.from_iterable(

983

annotations().iteritems()

984

for name, annotations in

985

self._get_all_dbus_things("interface")

986

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

987

)).iteritems():

988

ann_tag = document.createElement("annotation")

989

ann_tag.setAttribute("name", annotation)

990

ann_tag.setAttribute("value", value)

991

if_tag.appendChild(ann_tag)

897

992

# Add the names to the return values for the

898

993

# "org.freedesktop.DBus.Properties" methods

899

994

if (if_tag.getAttribute("name")

914

1009

except (AttributeError, xml.dom.DOMException,

915

1010

xml.parsers.expat.ExpatError) as error:

916

1011

logger.error("Failed to override Introspection method",

917

error)

1012

exc_info=error)

918

1013

return xmlstring

919

1014

920

1015

926

1021

variant_level=variant_level)

927

1022

928

1023

929

class AlternateDBusNamesMetaclass(DBusObjectWithProperties

930

.__metaclass__):

931

"""Applied to an empty subclass of a D-Bus object, this metaclass

932

will add additional D-Bus attributes matching a certain pattern.

1024

def alternate_dbus_interfaces(alt_interface_names, deprecate=True):

1025

"""A class decorator; applied to a subclass of

1026

dbus.service.Object, it will add alternate D-Bus attributes with

1027

interface names according to the "alt_interface_names" mapping.

1028

Usage:

1029

1030

@alternate_dbus_names({"org.example.Interface":

1031

"net.example.AlternateInterface"})

1032

class SampleDBusObject(dbus.service.Object):

1033

@dbus.service.method("org.example.Interface")

1034

def SampleDBusMethod():

1035

pass

1036

1037

The above "SampleDBusMethod" on "SampleDBusObject" will be

1038

reachable via two interfaces: "org.example.Interface" and

1039

"net.example.AlternateInterface", the latter of which will have

1040

its D-Bus annotation "org.freedesktop.DBus.Deprecated" set to

1041

"true", unless "deprecate" is passed with a False value.

1042

1043

This works for methods and signals, and also for D-Bus properties

1044

(from DBusObjectWithProperties) and interfaces (from the

1045

dbus_interface_annotations decorator).

933

1046

"""

934

def __new__(mcs, name, bases, attr):

935

# Go through all the base classes which could have D-Bus

936

# methods, signals, or properties in them

937

for base in (b for b in bases

938

if issubclass(b, dbus.service.Object)):

939

# Go though all attributes of the base class

940

for attrname, attribute in inspect.getmembers(base):

1047

def wrapper(cls):

1048

for orig_interface_name, alt_interface_name in (

1049

alt_interface_names.iteritems()):

1050

attr = {}

1051

interface_names = set()

1052

# Go though all attributes of the class

1053

for attrname, attribute in inspect.getmembers(cls):

941

1054

# Ignore non-D-Bus attributes, and D-Bus attributes

942

1055

# with the wrong interface name

943

1056

if (not hasattr(attribute, "_dbus_interface")

944

1057

or not attribute._dbus_interface

945

.startswith("se.recompile.Mandos")):

1058

.startswith(orig_interface_name)):

946

1059

continue

947

1060

# Create an alternate D-Bus interface name based on

948

1061

# the current name

949

1062

alt_interface = (attribute._dbus_interface

950

.replace("se.recompile.Mandos",

951

"se.bsnet.fukt.Mandos"))

1063

.replace(orig_interface_name,

1064

alt_interface_name))

1065

interface_names.add(alt_interface)

952

1066

# Is this a D-Bus signal?

953

1067

if getattr(attribute, "_dbus_is_signal", False):

954

1068

# Extract the original non-method function by

969

1083

nonmethod_func.func_name,

970

1084

nonmethod_func.func_defaults,

971

1085

nonmethod_func.func_closure)))

1086

# Copy annotations, if any

1087

try:

1088

new_function._dbus_annotations = (

1089

dict(attribute._dbus_annotations))

1090

except AttributeError:

1091

pass

972

1092

# Define a creator of a function to call both the

973

# old and new functions, so both the old and new

974

# signals gets sent when the function is called

1093

# original and alternate functions, so both the

1094

# original and alternate signals gets sent when

1095

# the function is called

975

1096

def fixscope(func1, func2):

976

1097

"""This function is a scope container to pass

977

1098

func1 and func2 to the "call_both" function

984

1105

return call_both

985

1106

# Create the "call_both" function and add it to

986

1107

# the class

987

attr[attrname] = fixscope(attribute,

988

new_function)

1108

attr[attrname] = fixscope(attribute, new_function)

989

1109

# Is this a D-Bus method?

990

1110

elif getattr(attribute, "_dbus_is_method", False):

991

1111

# Create a new, but exactly alike, function

1002

1122

attribute.func_name,

1003

1123

attribute.func_defaults,

1004

1124

attribute.func_closure)))

1125

# Copy annotations, if any

1126

try:

1127

attr[attrname]._dbus_annotations = (

1128

dict(attribute._dbus_annotations))

1129

except AttributeError:

1130

pass

1005

1131

# Is this a D-Bus property?

1006

1132

elif getattr(attribute, "_dbus_is_property", False):

1007

1133

# Create a new, but exactly alike, function

1021

1147

attribute.func_name,

1022

1148

attribute.func_defaults,

1023

1149

attribute.func_closure)))

1024

return type.__new__(mcs, name, bases, attr)

1025

1026

1150

# Copy annotations, if any

1151

try:

1152

attr[attrname]._dbus_annotations = (

1153

dict(attribute._dbus_annotations))

1154

except AttributeError:

1155

pass

1156

# Is this a D-Bus interface?

1157

elif getattr(attribute, "_dbus_is_interface", False):

1158

# Create a new, but exactly alike, function

1159

# object. Decorate it to be a new D-Bus interface

1160

# with the alternate D-Bus interface name. Add it

1161

# to the class.

1162

attr[attrname] = (dbus_interface_annotations

1163

(alt_interface)

1164

(types.FunctionType

1165

(attribute.func_code,

1166

attribute.func_globals,

1167

attribute.func_name,

1168

attribute.func_defaults,

1169

attribute.func_closure)))

1170

if deprecate:

1171

# Deprecate all alternate interfaces

1172

iname="_AlternateDBusNames_interface_annotation{0}"

1173

for interface_name in interface_names:

1174

@dbus_interface_annotations(interface_name)

1175

def func(self):

1176

return { "org.freedesktop.DBus.Deprecated":

1177

"true" }

1178

# Find an unused name

1179

for aname in (iname.format(i)

1180

for i in itertools.count()):

1181

if aname not in attr:

1182

attr[aname] = func

1183

break

1184

if interface_names:

1185

# Replace the class with a new subclass of it with

1186

# methods, signals, etc. as created above.

1187

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

1188

(cls,), attr)

1189

return cls

1190

return wrapper

1191

1192

1193

@alternate_dbus_interfaces({"se.recompile.Mandos":

1194

"se.bsnet.fukt.Mandos"})

1027

1195

class ClientDBus(Client, DBusObjectWithProperties):

1028

1196

"""A Client class using D-Bus

1029

1197

1040

1208

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

1041

1209

self.bus = bus

1042

1210

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

1043

self._approvals_pending = 0

1044

1045

self._approvals_pending = 0

1046

1211

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

1047

1212

# the D-Bus

1048

1213

client_object_name = unicode(self.name).translate(

1052

1217

("/clients/" + client_object_name))

1053

1218

DBusObjectWithProperties.__init__(self, self.bus,

1054

1219

self.dbus_object_path)

1055

1220

1056

1221

def notifychangeproperty(transform_func,

1057

1222

dbus_name, type_func=lambda x: x,

1058

1223

variant_level=1):

1081

1246

1082

1247

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

1083

1248

1084

1085

1249

expires = notifychangeproperty(datetime_to_dbus, "Expires")

1086

1250

approvals_pending = notifychangeproperty(dbus.Boolean,

1087

1251

"ApprovalPending",

1094

1258

checker is not None)

1095

1259

last_checked_ok = notifychangeproperty(datetime_to_dbus,

1096

1260

"LastCheckedOK")

1261

last_checker_status = notifychangeproperty(dbus.Int16,

1262

"LastCheckerStatus")

1097

1263

last_approval_request = notifychangeproperty(

1098

1264

datetime_to_dbus, "LastApprovalRequest")

1099

1265

approved_by_default = notifychangeproperty(dbus.Boolean,

1173

1339

(self.approval_duration),

1174

1340

self._reset_approved)

1175

1341

1176

1177

1342

## D-Bus methods, signals & properties

1178

1343

_interface = "se.recompile.Mandos.Client"

1179

1344

1345

## Interfaces

1346

1347

@dbus_interface_annotations(_interface)

1348

def _foo(self):

1349

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

1350

"false"}

1351

1180

1352

## Signals

1181

1353

1182

1354

# CheckerCompleted - signal

1218

1390

"D-Bus signal"

1219

1391

return self.need_approval()

1220

1392

1221

# NeRwequest - signal

1222

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

1223

def NewRequest(self, ip):

1224

"""D-Bus signal

1225

Is sent after a client request a password.

1226

"""

1227

pass

1228

1229

1393

## Methods

1230

1394

1231

1395

# Approve - method

1341

1505

return

1342

1506

return datetime_to_dbus(self.last_checked_ok)

1343

1507

1508

# LastCheckerStatus - property

1509

@dbus_service_property(_interface, signature="n",

1510

access="read")

1511

def LastCheckerStatus_dbus_property(self):

1512

return dbus.Int16(self.last_checker_status)

1513

1344

1514

# Expires - property

1345

1515

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

1346

1516

def Expires_dbus_property(self):

1358

1528

if value is None: # get

1359

1529

return dbus.UInt64(self.timeout_milliseconds())

1360

1530

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

1361

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

1362

return

1363

1531

# Reschedule timeout

1364

gobject.source_remove(self.disable_initiator_tag)

1365

self.disable_initiator_tag = None

1366

self.expires = None

1367

time_to_die = timedelta_to_milliseconds((self

1368

.last_checked_ok

1369

+ self.timeout)

1370

- datetime.datetime

1371

.utcnow())

1372

if time_to_die <= 0:

1373

# The timeout has passed

1374

self.disable()

1375

else:

1376

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

1377

+ datetime.timedelta(milliseconds =

1378

time_to_die))

1379

self.disable_initiator_tag = (gobject.timeout_add

1380

(time_to_die, self.disable))

1532

if self.enabled:

1533

now = datetime.datetime.utcnow()

1534

time_to_die = timedelta_to_milliseconds(

1535

(self.last_checked_ok + self.timeout) - now)

1536

if time_to_die <= 0:

1537

# The timeout has passed

1538

self.disable()

1539

else:

1540

self.expires = (now +

1541

datetime.timedelta(milliseconds =

1542

time_to_die))

1543

if (getattr(self, "disable_initiator_tag", None)

1544

is None):

1545

return

1546

gobject.source_remove(self.disable_initiator_tag)

1547

self.disable_initiator_tag = (gobject.timeout_add

1548

(time_to_die,

1549

self.disable))

1381

1550

1382

1551

# ExtendedTimeout - property

1383

1552

@dbus_service_property(_interface, signature="t",

1462

1631

self._pipe.send(('setattr', name, value))

1463

1632

1464

1633

1465

class ClientDBusTransitional(ClientDBus):

1466

__metaclass__ = AlternateDBusNamesMetaclass

1467

1468

1469

1634

class ClientHandler(socketserver.BaseRequestHandler, object):

1470

1635

"""A class to handle client connections.

1471

1636

1539

1704

except KeyError:

1540

1705

return

1541

1706

1542

if self.server.use_dbus:

1543

# Emit D-Bus signal

1544

client.NewRequest(str(self.client_address))

1545

1546

1707

if client.approval_delay:

1547

1708

delay = client.approval_delay

1548

1709

client.approvals_pending += 1

1603

1764

try:

1604

1765

sent = session.send(client.secret[sent_size:])

1605

1766

except gnutls.errors.GNUTLSError as error:

1606

logger.warning("gnutls send failed")

1767

logger.warning("gnutls send failed",

1768

exc_info=error)

1607

1769

return

1608

1770

logger.debug("Sent: %d, remaining: %d",

1609

1771

sent, len(client.secret)

1612

1774

1613

1775

logger.info("Sending secret to %s", client.name)

1614

1776

# bump the timeout using extended_timeout

1615

client.checked_ok(client.extended_timeout)

1777

client.bump_timeout(client.extended_timeout)

1616

1778

if self.server.use_dbus:

1617

1779

# Emit D-Bus signal

1618

1780

client.GotSecret()

1623

1785

try:

1624

1786

session.bye()

1625

1787

except gnutls.errors.GNUTLSError as error:

1626

logger.warning("GnuTLS bye failed")

1788

logger.warning("GnuTLS bye failed",

1789

exc_info=error)

1627

1790

1628

1791

@staticmethod

1629

1792

def peer_certificate(session):

1941

2104

elif suffix == "w":

1942

2105

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

1943

2106

else:

1944

raise ValueError("Unknown suffix %r" % suffix)

2107

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

2108

.format(suffix))

1945

2109

except (ValueError, IndexError) as e:

1946

2110

raise ValueError(*(e.args))

1947

2111

timevalue += delta

1961

2125

sys.exit()

1962

2126

if not noclose:

1963

2127

# Close all standard open file descriptors

1964

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

2128

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

1965

2129

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

1966

2130

raise OSError(errno.ENODEV,

1967

"%s not a character device"

1968

% os.path.devnull)

2131

"{0} not a character device"

2132

.format(os.devnull))

1969

2133

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

1970

2134

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

1971

2135

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

1980

2144

1981

2145

parser = argparse.ArgumentParser()

1982

2146

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

1983

version = "%%(prog)s %s" % version,

2147

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

1984

2148

help="show version number and exit")

1985

2149

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

1986

2150

help="Bind to interface IF")

2089

2253

2090

2254

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

2091

2255

syslogger.setFormatter(logging.Formatter

2092

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

2093

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

2094

% server_settings["servicename"]))

2256

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

2257

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

2258

.format(server_settings

2259

["servicename"])))

2095

2260

2096

2261

# Parse config file with clients

2097

client_config = configparser.SafeConfigParser(Client.client_defaults)

2262

client_config = configparser.SafeConfigParser(Client

2263

.client_defaults)

2098

2264

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

2099

2265

"clients.conf"))

2100

2266

2114

2280

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

2115

2281

try:

2116

2282

pidfile = open(pidfilename, "w")

2117

except IOError:

2118

logger.error("Could not open file %r", pidfilename)

2283

except IOError as e:

2284

logger.error("Could not open file %r", pidfilename,

2285

exc_info=e)

2119

2286

2120

try:

2121

uid = pwd.getpwnam("_mandos").pw_uid

2122

gid = pwd.getpwnam("_mandos").pw_gid

2123

except KeyError:

2287

for name in ("_mandos", "mandos", "nobody"):

2124

2288

try:

2125

uid = pwd.getpwnam("mandos").pw_uid

2126

gid = pwd.getpwnam("mandos").pw_gid

2289

uid = pwd.getpwnam(name).pw_uid

2290

gid = pwd.getpwnam(name).pw_gid

2291

break

2127

2292

except KeyError:

2128

try:

2129

uid = pwd.getpwnam("nobody").pw_uid

2130

gid = pwd.getpwnam("nobody").pw_gid

2131

except KeyError:

2132

uid = 65534

2133

gid = 65534

2293

continue

2294

else:

2295

uid = 65534

2296

gid = 65534

2134

2297

try:

2135

2298

os.setgid(gid)

2136

2299

os.setuid(uid)

2153

2316

.gnutls_global_set_log_function(debug_gnutls))

2154

2317

2155

2318

# Redirect stdin so all checkers get /dev/null

2156

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

2319

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

2157

2320

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

2158

2321

if null > 2:

2159

2322

os.close(null)

2167

2330

2168

2331

global main_loop

2169

2332

# From the Avahi example code

2170

DBusGMainLoop(set_as_default=True )

2333

DBusGMainLoop(set_as_default=True)

2171

2334

main_loop = gobject.MainLoop()

2172

2335

bus = dbus.SystemBus()

2173

2336

# End of Avahi example code

2179

2342

("se.bsnet.fukt.Mandos", bus,

2180

2343

do_not_queue=True))

2181

2344

except dbus.exceptions.NameExistsException as e:

2182

logger.error(unicode(e) + ", disabling D-Bus")

2345

logger.error("Disabling D-Bus:", exc_info=e)

2183

2346

use_dbus = False

2184

2347

server_settings["use_dbus"] = False

2185

2348

tcp_server.use_dbus = False

2197

2360

2198

2361

client_class = Client

2199

2362

if use_dbus:

2200

client_class = functools.partial(ClientDBusTransitional,

2201

bus = bus)

2363

client_class = functools.partial(ClientDBus, bus = bus)

2202

2364

2203

2365

client_settings = Client.config_parser(client_config)

2204

2366

old_client_settings = {}

2212

2374

(stored_state))

2213

2375

os.remove(stored_state_path)

2214

2376

except IOError as e:

2215

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

2216

.format(e))

2217

if e.errno != errno.ENOENT:

2377

if e.errno == errno.ENOENT:

2378

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

2379

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

2380

else:

2381

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

2382

exc_info=e)

2218

2383

raise

2219

2384

except EOFError as e:

2220

2385

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

2221

"EOFError: {0}".format(e))

2386

"EOFError:", exc_info=e)

2222

2387

2223

2388

with PGPEngine() as pgp:

2224

2389

for client_name, client in clients_data.iteritems():

2241

2406

2242

2407

# Clients who has passed its expire date can still be

2243

2408

# enabled if its last checker was successful. Clients

2244

# whose checker failed before we stored its state is

2245

# assumed to have failed all checkers during downtime.

2409

# whose checker succeeded before we stored its state is

2410

# assumed to have successfully run all checkers during

2411

# downtime.

2246

2412

if client["enabled"]:

2247

2413

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

2248

2414

if not client["last_checked_ok"]:

2249

2415

logger.warning(

2250

2416

"disabling client {0} - Client never "

2251

"performed a successfull checker"

2252

.format(client["name"]))

2417

"performed a successful checker"

2418

.format(client_name))

2253

2419

client["enabled"] = False

2254

2420

elif client["last_checker_status"] != 0:

2255

2421

logger.warning(

2256

2422

"disabling client {0} - Client "

2257

2423

"last checker failed with error code {1}"

2258

.format(client["name"],

2424

.format(client_name,

2259

2425

client["last_checker_status"]))

2260

2426

client["enabled"] = False

2261

2427

else:

2262

2428

client["expires"] = (datetime.datetime

2263

2429

.utcnow()

2264

2430

+ client["timeout"])

2265

2431

logger.debug("Last checker succeeded,"

2432

" keeping {0} enabled"

2433

.format(client_name))

2266

2434

try:

2267

2435

client["secret"] = (

2268

2436

pgp.decrypt(client["encrypted_secret"],

2274

2442

.format(client_name))

2275

2443

client["secret"] = (

2276

2444

client_settings[client_name]["secret"])

2277

2278

2445

2279

2446

# Add/remove clients based on new changes made to config

2280

for client_name in set(old_client_settings) - set(client_settings):

2447

for client_name in (set(old_client_settings)

2448

- set(client_settings)):

2281

2449

del clients_data[client_name]

2282

for client_name in set(client_settings) - set(old_client_settings):

2450

for client_name in (set(client_settings)

2451

- set(old_client_settings)):

2283

2452

clients_data[client_name] = client_settings[client_name]

2284

2285

# Create clients all clients

2453

2454

# Create all client objects

2286

2455

for client_name, client in clients_data.iteritems():

2287

2456

tcp_server.clients[client_name] = client_class(

2288

2457

name = client_name, settings = client)

2289

2458

2290

2459

if not tcp_server.clients:

2291

2460

logger.warning("No clients defined")

2292

2461

2293

2462

if not debug:

2294

2463

try:

2295

2464

with pidfile:

2309

2478

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

2310

2479

2311

2480

if use_dbus:

2312

class MandosDBusService(dbus.service.Object):

2481

@alternate_dbus_interfaces({"se.recompile.Mandos":

2482

"se.bsnet.fukt.Mandos"})

2483

class MandosDBusService(DBusObjectWithProperties):

2313

2484

"""A D-Bus proxy object"""

2314

2485

def __init__(self):

2315

2486

dbus.service.Object.__init__(self, bus, "/")

2316

2487

_interface = "se.recompile.Mandos"

2317

2488

2489

@dbus_interface_annotations(_interface)

2490

def _foo(self):

2491

return { "org.freedesktop.DBus.Property"

2492

".EmitsChangedSignal":

2493

"false"}

2494

2318

2495

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

2319

2496

def ClientAdded(self, objpath):

2320

2497

"D-Bus signal"

2362

2539

2363

2540

del _interface

2364

2541

2365

class MandosDBusServiceTransitional(MandosDBusService):

2366

__metaclass__ = AlternateDBusNamesMetaclass

2367

mandos_dbus_service = MandosDBusServiceTransitional()

2542

mandos_dbus_service = MandosDBusService()

2368

2543

2369

2544

def cleanup():

2370

2545

"Cleanup function; run on exit"

2411

2586

pickle.dump((clients, client_settings), stored_state)

2412

2587

os.rename(tempname, stored_state_path)

2413

2588

except (IOError, OSError) as e:

2414

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

2415

.format(e))

2416

2589

if not debug:

2417

2590

try:

2418

2591

os.remove(tempname)

2419

2592

except NameError:

2420

2593

pass

2421

if e.errno not in set((errno.ENOENT, errno.EACCES,

2422

errno.EEXIST)):

2594

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

2595

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

2596

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

2597

else:

2598

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

2599

exc_info=e)

2423

2600

raise e

2424

2601

2425

2602

# Delete all clients, and settings from config

2453

2630

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

2454

2631

if use_ipv6:

2455

2632

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

2456

" flowinfo %d, scope_id %d"

2457

% tcp_server.socket.getsockname())

2633

" flowinfo %d, scope_id %d",

2634

*tcp_server.socket.getsockname())

2458

2635

else: # IPv4

2459

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

2460

% tcp_server.socket.getsockname())

2636

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

2637

*tcp_server.socket.getsockname())

2461

2638

2462

2639

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

2463

2640

2466

2643

try:

2467

2644

service.activate()

2468

2645

except dbus.exceptions.DBusException as error:

2469

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

2646

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

2470

2647

cleanup()

2471

2648

sys.exit(1)

2472

2649

# End of Avahi example code

2479

2656

logger.debug("Starting main loop")

2480

2657

main_loop.run()

2481

2658

except AvahiError as error:

2482

logger.critical("AvahiError: %s", error)

2659

logger.critical("Avahi Error", exc_info=error)

2483

2660

cleanup()

2484

2661

sys.exit(1)

2485

2662

except KeyboardInterrupt: