/mandos/trunk : revision 609

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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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import ctypes.util

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import xml.dom.minidom

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import inspect

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import GnuPGInterface

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try:

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SO_BINDTODEVICE = socket.SO_BINDTODEVICE

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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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class PGPEngine(object):

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"""A simple class for OpenPGP symmetric encryption & decryption"""

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def __init__(self):

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self.gnupg = GnuPGInterface.GnuPG()

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self.tempdir = tempfile.mkdtemp(prefix="mandos-")

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self.gnupgargs = ['--batch',

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'--home', self.tempdir,

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'--force-mdc',

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'--quiet',

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'--no-use-agent']

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self.gnupg = GnuPGInterface.GnuPG()

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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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'--no-use-agent'])

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def __enter__(self):

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return self

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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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with tempfile.NamedTemporaryFile(dir=self.tempdir

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) as passfile:

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passfile.write(passphrase)

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passfile.flush()

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proc = subprocess.Popen(['gpg', '--symmetric',

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'--passphrase-file',

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passfile.name]

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+ self.gnupgargs,

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stdin = subprocess.PIPE,

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stdout = subprocess.PIPE,

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stderr = subprocess.PIPE)

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ciphertext, err = proc.communicate(input = data)

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if proc.returncode != 0:

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raise PGPError(err)

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

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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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attach_fhs={'stderr': devnull})

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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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ciphertext = f.read()

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proc.wait()

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except IOError as e:

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raise PGPError(e)

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self.gnupg.passphrase = None

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return ciphertext

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def decrypt(self, data, password):

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passphrase = self.password_encode(password)

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with tempfile.NamedTemporaryFile(dir = self.tempdir

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) as passfile:

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passfile.write(passphrase)

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passfile.flush()

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proc = subprocess.Popen(['gpg', '--decrypt',

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'--passphrase-file',

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passfile.name]

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+ self.gnupgargs,

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stdin = subprocess.PIPE,

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stdout = subprocess.PIPE,

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stderr = subprocess.PIPE)

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decrypted_plaintext, err = proc.communicate(input

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= data)

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if proc.returncode != 0:

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raise PGPError(err)

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

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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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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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proc.wait()

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except IOError as e:

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raise PGPError(e)

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self.gnupg.passphrase = None

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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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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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Used to optionally bind to the specified interface.

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name: string; Example: 'Mandos'

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type: string; Example: '_mandos._tcp'.

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See <https://www.iana.org/assignments/service-names-port-numbers>

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See <http://www.dns-sd.org/ServiceTypes.html>

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port: integer; what port to announce

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TXT: list of strings; TXT record for the service

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domain: string; Domain to publish on, default to .local if empty.

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" 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.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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self.remove()

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

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ret = AvahiService.rename(self)

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syslogger.setFormatter(logging.Formatter

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

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

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

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.format(self.name)))

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return ret

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def timedelta_to_milliseconds(td):

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"Convert a datetime.timedelta() to milliseconds"

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

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+ (td.seconds * 1000)

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+ (td.microseconds // 1000))

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class Client(object):

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

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404

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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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server_settings: The server_settings dict from main()

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"""

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runtime_expansions = ("approval_delay", "approval_duration",

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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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return settings

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

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

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self.name = name

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if server_settings is None:

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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)

676

except AttributeError:

677

pass

678

except OSError as error:

679

if error.errno != errno.ECHILD:

680

raise

683

except (AttributeError, OSError) as error:

684

if (isinstance(error, OSError)

685

and error.errno != errno.ECHILD):

686

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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693

# Start a new checker if needed

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if self.checker is None:

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695

# 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(

697

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

698

for attr in

699

self.runtime_expansions)

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try:

694

701

command = self.checker_command % escaped_attrs

695

702

except TypeError as error:

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711

# in normal mode, that is already done by daemon(),

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712

# and in debug mode we don't want to. (Stdin is

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713

# always replaced by /dev/null.)

707

# The exception is when not debugging but nevertheless

708

# running in the foreground; use the previously

709

# created wnull.

710

popen_args = {}

711

if (not self.server_settings["debug"]

712

and self.server_settings["foreground"]):

713

popen_args.update({"stdout": wnull,

714

"stderr": wnull })

715

714

self.checker = subprocess.Popen(command,

716

715

close_fds=True,

717

shell=True, cwd="/",

718

**popen_args)

716

shell=True, cwd="/")

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717

except OSError as error:

720

718

logger.error("Failed to start subprocess",

721

719

exc_info=error)

722

return True

723

720

self.checker_callback_tag = (gobject.child_watch_add

724

721

(self.checker.pid,

725

722

self.checker_callback,

726

723

data=command))

727

724

# The checker may have completed before the gobject

728

725

# watch was added. Check for this.

729

try:

730

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

731

except OSError as error:

732

if error.errno == errno.ECHILD:

733

# This should never happen

734

logger.error("Child process vanished",

735

exc_info=error)

736

return True

737

raise

726

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

738

727

if pid:

739

728

gobject.source_remove(self.checker_callback_tag)

740

729

self.checker_callback(pid, status, command)

776

765

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

777

766

if byte_arrays and signature != "ay":

778

767

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

779

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

768

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

780

769

def decorator(func):

781

770

func._dbus_is_property = True

782

771

func._dbus_interface = dbus_interface

813

802

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

814

803

Usage:

815

804

816

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

817

"org.freedesktop.DBus.Property."

818

"EmitsChangedSignal": "false"})

819

805

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

820

806

access="r")

807

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

808

"org.freedesktop.DBus.Property."

809

"EmitsChangedSignal": "false"})

821

810

def Property_dbus_property(self):

822

811

return dbus.Boolean(False)

823

812

"""

830

819

class DBusPropertyException(dbus.exceptions.DBusException):

831

820

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

832

821

"""

833

pass

822

def __unicode__(self):

823

return unicode(str(self))

824

834

825

835

826

class DBusPropertyAccessException(DBusPropertyException):

836

827

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

859

850

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

860

851

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

861

852

"""

862

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

853

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

863

854

False)

864

855

865

856

def _get_all_dbus_things(self, thing):

914

905

# The byte_arrays option is not supported yet on

915

906

# signatures other than "ay".

916

907

if prop._dbus_signature != "ay":

917

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

918

"'ay' signature {!r}"

919

.format(prop._dbus_signature))

908

raise ValueError

920

909

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

921

910

for byte in value))

922

911

prop(value)

946

935

value.variant_level+1)

947

936

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

948

937

949

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

950

def PropertiesChanged(self, interface_name, changed_properties,

951

invalidated_properties):

952

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

953

standard.

954

"""

955

pass

956

957

938

@dbus.service.method(dbus.INTROSPECTABLE_IFACE,

958

939

out_signature="s",

959

940

path_keyword='object_path',

994

975

(prop,

995

976

"_dbus_annotations",

996

977

{}))

997

for name, value in annots.items():

978

for name, value in annots.iteritems():

998

979

ann_tag = document.createElement(

999

980

"annotation")

1000

981

ann_tag.setAttribute("name", name)

1003

984

# Add interface annotation tags

1004

985

for annotation, value in dict(

1005

986

itertools.chain.from_iterable(

1006

annotations().items()

987

annotations().iteritems()

1007

988

for name, annotations in

1008

989

self._get_all_dbus_things("interface")

1009

990

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

1010

)).items():

991

)).iteritems():

1011

992

ann_tag = document.createElement("annotation")

1012

993

ann_tag.setAttribute("name", annotation)

1013

994

ann_tag.setAttribute("value", value)

1069

1050

"""

1070

1051

def wrapper(cls):

1071

1052

for orig_interface_name, alt_interface_name in (

1072

alt_interface_names.items()):

1053

alt_interface_names.iteritems()):

1073

1054

attr = {}

1074

1055

interface_names = set()

1075

1056

# Go though all attributes of the class

1088

1069

interface_names.add(alt_interface)

1089

1070

# Is this a D-Bus signal?

1090

1071

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

1091

# Extract the original non-method undecorated

1092

# function by black magic

1072

# Extract the original non-method function by

1073

# black magic

1093

1074

nonmethod_func = (dict(

1094

1075

zip(attribute.func_code.co_freevars,

1095

1076

attribute.__closure__))["func"]

1192

1173

attribute.func_closure)))

1193

1174

if deprecate:

1194

1175

# Deprecate all alternate interfaces

1195

iname="_AlternateDBusNames_interface_annotation{}"

1176

iname="_AlternateDBusNames_interface_annotation{0}"

1196

1177

for interface_name in interface_names:

1197

1178

@dbus_interface_annotations(interface_name)

1198

1179

def func(self):

1207

1188

if interface_names:

1208

1189

# Replace the class with a new subclass of it with

1209

1190

# methods, signals, etc. as created above.

1210

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

1191

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

1211

1192

(cls,), attr)

1212

1193

return cls

1213

1194

return wrapper

1226

1207

runtime_expansions = (Client.runtime_expansions

1227

1208

+ ("dbus_object_path",))

1228

1209

1229

_interface = "se.recompile.Mandos.Client"

1230

1231

1210

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

1232

1211

1233

1212

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

1235

1214

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

1236

1215

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

1237

1216

# the D-Bus

1238

client_object_name = str(self.name).translate(

1217

client_object_name = unicode(self.name).translate(

1239

1218

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

1240

1219

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

1241

1220

self.dbus_object_path = (dbus.ObjectPath

1245

1224

1246

1225

def notifychangeproperty(transform_func,

1247

1226

dbus_name, type_func=lambda x: x,

1248

variant_level=1, invalidate_only=False,

1249

_interface=_interface):

1227

variant_level=1):

1250

1228

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

1251

1229

its changes to DBus.

1252

1230

1257

1235

to the D-Bus. Default: no transform

1258

1236

variant_level: D-Bus variant level. Default: 1

1259

1237

"""

1260

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

1238

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

1261

1239

def setter(self, value):

1262

1240

if hasattr(self, "dbus_object_path"):

1263

1241

if (not hasattr(self, attrname) or

1264

1242

type_func(getattr(self, attrname, None))

1265

1243

!= type_func(value)):

1266

if invalidate_only:

1267

self.PropertiesChanged(_interface,

1268

dbus.Dictionary(),

1269

dbus.Array

1270

((dbus_name,)))

1271

else:

1272

dbus_value = transform_func(type_func(value),

1273

variant_level

1274

=variant_level)

1275

self.PropertyChanged(dbus.String(dbus_name),

1276

dbus_value)

1277

self.PropertiesChanged(_interface,

1278

dbus.Dictionary({

1279

dbus.String(dbus_name):

1280

dbus_value }), dbus.Array())

1244

dbus_value = transform_func(type_func(value),

1245

variant_level

1246

=variant_level)

1247

self.PropertyChanged(dbus.String(dbus_name),

1248

dbus_value)

1281

1249

setattr(self, attrname, value)

1282

1250

1283

1251

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

1303

1271

approval_delay = notifychangeproperty(dbus.UInt64,

1304

1272

"ApprovalDelay",

1305

1273

type_func =

1306

lambda td: td.total_seconds()

1307

* 1000)

1274

timedelta_to_milliseconds)

1308

1275

approval_duration = notifychangeproperty(

1309

1276

dbus.UInt64, "ApprovalDuration",

1310

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

1277

type_func = timedelta_to_milliseconds)

1311

1278

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

1312

1279

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

1313

type_func = lambda td:

1314

td.total_seconds() * 1000)

1280

type_func =

1281

timedelta_to_milliseconds)

1315

1282

extended_timeout = notifychangeproperty(

1316

1283

dbus.UInt64, "ExtendedTimeout",

1317

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

1284

type_func = timedelta_to_milliseconds)

1318

1285

interval = notifychangeproperty(dbus.UInt64,

1319

1286

"Interval",

1320

1287

type_func =

1321

lambda td: td.total_seconds()

1322

* 1000)

1288

timedelta_to_milliseconds)

1323

1289

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

1324

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

1325

invalidate_only=True)

1326

1290

1327

1291

del notifychangeproperty

1328

1292

1355

1319

*args, **kwargs)

1356

1320

1357

1321

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

1358

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

1322

old_checker = self.checker

1323

if self.checker is not None:

1324

old_checker_pid = self.checker.pid

1325

else:

1326

old_checker_pid = None

1359

1327

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

1360

1328

# Only if new checker process was started

1361

1329

if (self.checker is not None

1370

1338

1371

1339

def approve(self, value=True):

1372

1340

self.approved = value

1373

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

1374

* 1000), self._reset_approved)

1341

gobject.timeout_add(timedelta_to_milliseconds

1342

(self.approval_duration),

1343

self._reset_approved)

1375

1344

self.send_changedstate()

1376

1345

1377

1346

## D-Bus methods, signals & properties

1347

_interface = "se.recompile.Mandos.Client"

1378

1348

1379

1349

## Interfaces

1380

1350

1351

@dbus_interface_annotations(_interface)

1352

def _foo(self):

1353

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

1354

"false"}

1355

1381

1356

## Signals

1382

1357

1383

1358

# CheckerCompleted - signal

1393

1368

pass

1394

1369

1395

1370

# PropertyChanged - signal

1396

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

1397

1371

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

1398

1372

def PropertyChanged(self, property, value):

1399

1373

"D-Bus signal"

1475

1449

access="readwrite")

1476

1450

def ApprovalDelay_dbus_property(self, value=None):

1477

1451

if value is None: # get

1478

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

1479

* 1000)

1452

return dbus.UInt64(self.approval_delay_milliseconds())

1480

1453

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

1481

1454

1482

1455

# ApprovalDuration - property

1484

1457

access="readwrite")

1485

1458

def ApprovalDuration_dbus_property(self, value=None):

1486

1459

if value is None: # get

1487

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

1488

* 1000)

1460

return dbus.UInt64(timedelta_to_milliseconds(

1461

self.approval_duration))

1489

1462

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

1490

1463

1491

1464

# Name - property

1504

1477

def Host_dbus_property(self, value=None):

1505

1478

if value is None: # get

1506

1479

return dbus.String(self.host)

1507

self.host = str(value)

1480

self.host = unicode(value)

1508

1481

1509

1482

# Created - property

1510

1483

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

1557

1530

access="readwrite")

1558

1531

def Timeout_dbus_property(self, value=None):

1559

1532

if value is None: # get

1560

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

1533

return dbus.UInt64(self.timeout_milliseconds())

1561

1534

old_timeout = self.timeout

1562

1535

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

1563

1536

# Reschedule disabling

1574

1547

gobject.source_remove(self.disable_initiator_tag)

1575

1548

self.disable_initiator_tag = (

1576

1549

gobject.timeout_add(

1577

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

1578

* 1000), self.disable))

1550

timedelta_to_milliseconds(self.expires - now),

1551

self.disable))

1579

1552

1580

1553

# ExtendedTimeout - property

1581

1554

@dbus_service_property(_interface, signature="t",

1582

1555

access="readwrite")

1583

1556

def ExtendedTimeout_dbus_property(self, value=None):

1584

1557

if value is None: # get

1585

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

1586

* 1000)

1558

return dbus.UInt64(self.extended_timeout_milliseconds())

1587

1559

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

1588

1560

1589

1561

# Interval - property

1591

1563

access="readwrite")

1592

1564

def Interval_dbus_property(self, value=None):

1593

1565

if value is None: # get

1594

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

1566

return dbus.UInt64(self.interval_milliseconds())

1595

1567

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

1596

1568

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

1597

1569

return

1608

1580

def Checker_dbus_property(self, value=None):

1609

1581

if value is None: # get

1610

1582

return dbus.String(self.checker_command)

1611

self.checker_command = str(value)

1583

self.checker_command = unicode(value)

1612

1584

1613

1585

# CheckerRunning - property

1614

1586

@dbus_service_property(_interface, signature="b",

1630

1602

@dbus_service_property(_interface, signature="ay",

1631

1603

access="write", byte_arrays=True)

1632

1604

def Secret_dbus_property(self, value):

1633

self.secret = bytes(value)

1605

self.secret = str(value)

1634

1606

1635

1607

del _interface

1636

1608

1670

1642

def handle(self):

1671

1643

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

1672

1644

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

1673

str(self.client_address))

1645

unicode(self.client_address))

1674

1646

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

1675

1647

self.server.child_pipe.fileno())

1676

1648

1702

1674

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

1703

1675

try:

1704

1676

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

1705

raise RuntimeError(line)

1677

raise RuntimeError

1706

1678

except (ValueError, IndexError, RuntimeError) as error:

1707

1679

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

1708

1680

return

1757

1729

if self.server.use_dbus:

1758

1730

# Emit D-Bus signal

1759

1731

client.NeedApproval(

1760

client.approval_delay.total_seconds()

1761

* 1000, client.approved_by_default)

1732

client.approval_delay_milliseconds(),

1733

client.approved_by_default)

1762

1734

else:

1763

1735

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

1764

1736

client.name)

1770

1742

#wait until timeout or approved

1771

1743

time = datetime.datetime.now()

1772

1744

client.changedstate.acquire()

1773

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

1745

client.changedstate.wait(

1746

float(timedelta_to_milliseconds(delay)

1747

/ 1000))

1774

1748

client.changedstate.release()

1775

1749

time2 = datetime.datetime.now()

1776

1750

if (time2 - time) >= delay:

1913

1887

1914

1888

def add_pipe(self, parent_pipe, proc):

1915

1889

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

1916

raise NotImplementedError()

1890

raise NotImplementedError

1917

1891

1918

1892

1919

1893

class IPv6_TCPServer(MultiprocessingMixInWithPipe,

1975

1949

try:

1976

1950

self.socket.setsockopt(socket.SOL_SOCKET,

1977

1951

SO_BINDTODEVICE,

1978

(self.interface + "\0")

1979

.encode("utf-8"))

1952

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

1980

1953

except socket.error as error:

1981

1954

if error.errno == errno.EPERM:

1982

1955

logger.error("No permission to bind to"

1996

1969

if self.address_family == socket.AF_INET6:

1997

1970

any_address = "::" # in6addr_any

1998

1971

else:

1999

any_address = "0.0.0.0" # INADDR_ANY

1972

any_address = socket.INADDR_ANY

2000

1973

self.server_address = (any_address,

2001

1974

self.server_address[1])

2002

1975

elif not self.server_address[1]:

2185

2158

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

2186

2159

frozenset((token_year, token_month,

2187

2160

token_day, token_time,

2188

token_week)))

2161

token_week))),

2189

2162

# Define starting values

2190

2163

value = datetime.timedelta() # Value so far

2191

2164

found_token = None

2192

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

2165

followers = frozenset(token_duration,) # Following valid tokens

2193

2166

s = duration # String left to parse

2194

2167

# Loop until end token is found

2195

2168

while found_token is not token_end:

2242

2215

timevalue = datetime.timedelta(0)

2243

2216

for s in interval.split():

2244

2217

try:

2245

suffix = s[-1]

2218

suffix = unicode(s[-1])

2246

2219

value = int(s[:-1])

2247

2220

if suffix == "d":

2248

2221

delta = datetime.timedelta(value)

2255

2228

elif suffix == "w":

2256

2229

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

2257

2230

else:

2258

raise ValueError("Unknown suffix {!r}"

2231

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

2259

2232

.format(suffix))

2260

except IndexError as e:

2233

except (ValueError, IndexError) as e:

2261

2234

raise ValueError(*(e.args))

2262

2235

timevalue += delta

2263

2236

return timevalue

2278

2251

# Close all standard open file descriptors

2279

2252

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

2280

2253

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

2281

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

2254

raise OSError(errno.ENODEV,

2255

"{0} not a character device"

2282

2256

.format(os.devnull))

2283

2257

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

2284

2258

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

2294

2268

2295

2269

parser = argparse.ArgumentParser()

2296

2270

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

2297

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

2271

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

2298

2272

help="show version number and exit")

2299

2273

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

2300

2274

help="Bind to interface IF")

2306

2280

help="Run self-test")

2307

2281

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

2308

2282

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

2309

" to terminal", default=None)

2283

" to terminal")

2310

2284

parser.add_argument("--debuglevel", metavar="LEVEL",

2311

2285

help="Debug level for stdout output")

2312

2286

parser.add_argument("--priority", help="GnuTLS"

2319

2293

" files")

2320

2294

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

2321

2295

dest="use_dbus", help="Do not provide D-Bus"

2322

" system bus interface", default=None)

2296

" system bus interface")

2323

2297

parser.add_argument("--no-ipv6", action="store_false",

2324

dest="use_ipv6", help="Do not use IPv6",

2325

default=None)

2298

dest="use_ipv6", help="Do not use IPv6")

2326

2299

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

2327

2300

dest="restore", help="Do not restore stored"

2328

" state", default=None)

2301

" state")

2329

2302

parser.add_argument("--socket", type=int,

2330

2303

help="Specify a file descriptor to a network"

2331

2304

" socket to use instead of creating one")

2332

2305

parser.add_argument("--statedir", metavar="DIR",

2333

2306

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

2334

2307

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

2335

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

2336

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

2337

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

2338

default=None)

2308

help="Run in foreground")

2339

2309

2340

2310

options = parser.parse_args()

2341

2311

2342

2312

if options.check:

2343

2313

import doctest

2344

fail_count, test_count = doctest.testmod()

2345

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

2314

doctest.testmod()

2315

sys.exit()

2346

2316

2347

2317

# Default values for config file for server-global settings

2348

2318

server_defaults = { "interface": "",

2350

2320

"port": "",

2351

2321

"debug": "False",

2352

2322

"priority":

2353

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

2323

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

2354

2324

"servicename": "Mandos",

2355

2325

"use_dbus": "True",

2356

2326

"use_ipv6": "True",

2359

2329

"socket": "",

2360

2330

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

2361

2331

"foreground": "False",

2362

"zeroconf": "True",

2363

2332

}

2364

2333

2365

2334

# Parse config file for server-global settings

2392

2361

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

2393

2362

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

2394

2363

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

2395

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

2364

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

2396

2365

value = getattr(options, option)

2397

2366

if value is not None:

2398

2367

server_settings[option] = value

2399

2368

del options

2400

2369

# Force all strings to be unicode

2401

2370

for option in server_settings.keys():

2402

if isinstance(server_settings[option], bytes):

2403

server_settings[option] = (server_settings[option]

2404

.decode("utf-8"))

2405

# Force all boolean options to be boolean

2406

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

2407

"foreground", "zeroconf"):

2408

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

2371

if type(server_settings[option]) is str:

2372

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

2409

2373

# Debug implies foreground

2410

2374

if server_settings["debug"]:

2411

2375

server_settings["foreground"] = True

2413

2377

2414

2378

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

2415

2379

2416

if (not server_settings["zeroconf"] and

2417

not (server_settings["port"]

2418

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

2419

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

2420

" Zeroconf")

2421

2422

2380

# For convenience

2423

2381

debug = server_settings["debug"]

2424

2382

debuglevel = server_settings["debuglevel"]

2427

2385

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

2428

2386

stored_state_file)

2429

2387

foreground = server_settings["foreground"]

2430

zeroconf = server_settings["zeroconf"]

2431

2388

2432

2389

if debug:

2433

2390

initlogger(debug, logging.DEBUG)

2440

2397

2441

2398

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

2442

2399

syslogger.setFormatter(logging.Formatter

2443

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

2400

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

2444

2401

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

2445

2402

.format(server_settings

2446

2403

["servicename"])))

2454

2411

global mandos_dbus_service

2455

2412

mandos_dbus_service = None

2456

2413

2457

socketfd = None

2458

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

2459

socketfd = server_settings["socket"]

2460

2414

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

2461

2415

server_settings["port"]),

2462

2416

ClientHandler,

2466

2420

gnutls_priority=

2467

2421

server_settings["priority"],

2468

2422

use_dbus=use_dbus,

2469

socketfd=socketfd)

2423

socketfd=(server_settings["socket"]

2424

or None))

2470

2425

if not foreground:

2471

pidfilename = "/run/mandos.pid"

2472

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

2473

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

2426

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

2474

2427

pidfile = None

2475

2428

try:

2476

2429

pidfile = open(pidfilename, "w")

2493

2446

os.setuid(uid)

2494

2447

except OSError as error:

2495

2448

if error.errno != errno.EPERM:

2496

raise

2449

raise error

2497

2450

2498

2451

if debug:

2499

2452

# Enable all possible GnuTLS debugging

2542

2495

use_dbus = False

2543

2496

server_settings["use_dbus"] = False

2544

2497

tcp_server.use_dbus = False

2545

if zeroconf:

2546

protocol = avahi.PROTO_INET6 if use_ipv6 else avahi.PROTO_INET

2547

service = AvahiServiceToSyslog(name =

2548

server_settings["servicename"],

2549

servicetype = "_mandos._tcp",

2550

protocol = protocol, bus = bus)

2551

if server_settings["interface"]:

2552

service.interface = (if_nametoindex

2553

(server_settings["interface"]

2554

.encode("utf-8")))

2498

protocol = avahi.PROTO_INET6 if use_ipv6 else avahi.PROTO_INET

2499

service = AvahiServiceToSyslog(name =

2500

server_settings["servicename"],

2501

servicetype = "_mandos._tcp",

2502

protocol = protocol, bus = bus)

2503

if server_settings["interface"]:

2504

service.interface = (if_nametoindex

2505

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

2555

2506

2556

2507

global multiprocessing_manager

2557

2508

multiprocessing_manager = multiprocessing.Manager()

2564

2515

old_client_settings = {}

2565

2516

clients_data = {}

2566

2517

2567

# This is used to redirect stdout and stderr for checker processes

2568

global wnull

2569

wnull = open(os.devnull, "w") # A writable /dev/null

2570

# Only used if server is running in foreground but not in debug

2571

# mode

2572

if debug or not foreground:

2573

wnull.close()

2574

2575

2518

# Get client data and settings from last running state.

2576

2519

if server_settings["restore"]:

2577

2520

try:

2581

2524

os.remove(stored_state_path)

2582

2525

except IOError as e:

2583

2526

if e.errno == errno.ENOENT:

2584

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

2527

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

2585

2528

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

2586

2529

else:

2587

2530

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

2592

2535

"EOFError:", exc_info=e)

2593

2536

2594

2537

with PGPEngine() as pgp:

2595

for client_name, client in clients_data.items():

2596

# Skip removed clients

2597

if client_name not in client_settings:

2598

continue

2599

2538

for client_name, client in clients_data.iteritems():

2600

2539

# Decide which value to use after restoring saved state.

2601

2540

# We have three different values: Old config file,

2602

2541

# new config file, and saved state.

2623

2562

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

2624

2563

if not client["last_checked_ok"]:

2625

2564

logger.warning(

2626

"disabling client {} - Client never "

2565

"disabling client {0} - Client never "

2627

2566

"performed a successful checker"

2628

2567

.format(client_name))

2629

2568

client["enabled"] = False

2630

2569

elif client["last_checker_status"] != 0:

2631

2570

logger.warning(

2632

"disabling client {} - Client last"

2633

" checker failed with error code {}"

2571

"disabling client {0} - Client "

2572

"last checker failed with error code {1}"

2634

2573

.format(client_name,

2635

2574

client["last_checker_status"]))

2636

2575

client["enabled"] = False

2639

2578

.utcnow()

2640

2579

+ client["timeout"])

2641

2580

logger.debug("Last checker succeeded,"

2642

" keeping {} enabled"

2581

" keeping {0} enabled"

2643

2582

.format(client_name))

2644

2583

try:

2645

2584

client["secret"] = (

2648

2587

["secret"]))

2649

2588

except PGPError:

2650

2589

# If decryption fails, we use secret from new settings

2651

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

2590

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

2652

2591

.format(client_name))

2653

2592

client["secret"] = (

2654

2593

client_settings[client_name]["secret"])

2662

2601

clients_data[client_name] = client_settings[client_name]

2663

2602

2664

2603

# Create all client objects

2665

for client_name, client in clients_data.items():

2604

for client_name, client in clients_data.iteritems():

2666

2605

tcp_server.clients[client_name] = client_class(

2667

name = client_name, settings = client,

2668

server_settings = server_settings)

2606

name = client_name, settings = client)

2669

2607

2670

2608

if not tcp_server.clients:

2671

2609

logger.warning("No clients defined")

2675

2613

try:

2676

2614

with pidfile:

2677

2615

pid = os.getpid()

2678

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

2616

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

2679

2617

except IOError:

2680

2618

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

2681

2619

pidfilename, pid)

2727

2665

def GetAllClientsWithProperties(self):

2728

2666

"D-Bus method"

2729

2667

return dbus.Dictionary(

2730

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

2731

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

2668

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

2669

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

2732

2670

signature="oa{sv}")

2733

2671

2734

2672

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

2751

2689

2752

2690

def cleanup():

2753

2691

"Cleanup function; run on exit"

2754

if zeroconf:

2755

service.cleanup()

2692

service.cleanup()

2756

2693

2757

2694

multiprocessing.active_children()

2758

wnull.close()

2759

2695

if not (tcp_server.clients or client_settings):

2760

2696

return

2761

2697

2772

2708

2773

2709

# A list of attributes that can not be pickled

2774

2710

# + secret.

2775

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

2776

"checker", "server_settings" }

2711

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

2712

"checker"))

2777

2713

for name, typ in (inspect.getmembers

2778

2714

(dbus.service.Object)):

2779

2715

exclude.add(name)

2802

2738

except NameError:

2803

2739

pass

2804

2740

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

2805

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

2741

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

2806

2742

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

2807

2743

else:

2808

2744

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

2809

2745

exc_info=e)

2810

raise

2746

raise e

2811

2747

2812

2748

# Delete all clients, and settings from config

2813

2749

while tcp_server.clients:

2837

2773

tcp_server.server_activate()

2838

2774

2839

2775

# Find out what port we got

2840

if zeroconf:

2841

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

2776

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

2842

2777

if use_ipv6:

2843

2778

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

2844

2779

" flowinfo %d, scope_id %d",

2850

2785

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

2851

2786

2852

2787

try:

2853

if zeroconf:

2854

# From the Avahi example code

2855

try:

2856

service.activate()

2857

except dbus.exceptions.DBusException as error:

2858

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

2859

cleanup()

2860

sys.exit(1)

2861

# End of Avahi example code

2788

# From the Avahi example code

2789

try:

2790

service.activate()

2791

except dbus.exceptions.DBusException as error:

2792

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

2793

cleanup()

2794

sys.exit(1)

2795

# End of Avahi example code

2862

2796

2863

2797

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

2864

2798

lambda *args, **kwargs: