/mandos/release : revision 237.7.278

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#!/usr/bin/python

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#!/usr/bin/python2.7

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

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#

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

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

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#

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# Everything else is

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#

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# This program is free software: you can redistribute it and/or modify

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# it under the terms of the GNU General Public License as published by

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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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version = "1.6.0"

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if sys.version_info.major == 2:

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str = unicode

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version = "1.6.8"

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stored_state_file = "clients.pickle"

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logger = logging.getLogger()

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syslogger = (logging.handlers.SysLogHandler

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(facility = logging.handlers.SysLogHandler.LOG_DAEMON,

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

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syslogger = None

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try:

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if_nametoindex = (ctypes.cdll.LoadLibrary

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

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

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ifreq = fcntl.ioctl(s, SIOCGIFINDEX,

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

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interface))

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

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ifreq[16:20])[0]

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

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

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return interface_index

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

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"""init logger and add loglevel"""

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global syslogger

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syslogger = (logging.handlers.SysLogHandler

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(facility =

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logging.handlers.SysLogHandler.LOG_DAEMON,

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address = "/dev/log"))

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syslogger.setFormatter(logging.Formatter

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

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' %(message)s'))

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

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

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if len(encoded) > 2048:

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

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

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

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

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return encoded

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def encrypt(self, data, password):

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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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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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return ciphertext

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

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def __unicode__(self):

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return unicode(repr(self.value))

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

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**kwargs)

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class AvahiServiceError(AvahiError):

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pass

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

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

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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 = unicode(self.server

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.GetAlternativeServiceName(self.name))

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self.name = str(self.server

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.GetAlternativeServiceName(self.name))

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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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unicode(error))

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

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str(error))

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

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.format(error))

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def cleanup(self):

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

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

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

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.format(self.name)))

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return ret

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def timedelta_to_milliseconds(td):

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"Convert a datetime.timedelta() to milliseconds"

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

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+ (td.seconds * 1000)

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+ (td.microseconds // 1000))

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class Client(object):

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

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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 {0}"

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

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.format(section))

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

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client["extended_timeout"] = string_to_delta(

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return settings

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

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

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for setting, value in settings.items():

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setattr(self, setting, value)

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if self.enabled:

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if self.checker_initiator_tag is not None:

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gobject.source_remove(self.checker_initiator_tag)

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self.checker_initiator_tag = (gobject.timeout_add

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(self.interval_milliseconds(),

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(int(self.interval

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.total_seconds() * 1000),

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self.start_checker))

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

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if self.disable_initiator_tag is not None:

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gobject.source_remove(self.disable_initiator_tag)

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self.disable_initiator_tag = (gobject.timeout_add

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(self.timeout_milliseconds(),

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self.disable))

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(int(self.timeout

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.total_seconds() * 1000),

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self.disable))

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# Also start a new checker *right now*.

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self.start_checker()

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self.disable_initiator_tag = None

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

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self.disable_initiator_tag = (gobject.timeout_add

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(timedelta_to_milliseconds

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(timeout), self.disable))

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(int(timeout.total_seconds()

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* 1000), self.disable))

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

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def need_approval(self):

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

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try:

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

683

except (AttributeError, OSError) as error:

684

if (isinstance(error, OSError)

685

and error.errno != errno.ECHILD):

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raise error

676

except AttributeError:

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pass

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except OSError as error:

679

if error.errno != errno.ECHILD:

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raise

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681

else:

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if pid:

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logger.warning("Checker was a zombie")

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# Start a new checker if needed

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if self.checker is None:

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# Escape attributes for the shell

696

escaped_attrs = dict(

697

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

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for attr in

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self.runtime_expansions)

690

escaped_attrs = { attr:

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

692

for attr in self.runtime_expansions }

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try:

701

694

command = self.checker_command % escaped_attrs

702

695

except TypeError as error:

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704

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

712

705

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

713

706

# 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 })

714

715

self.checker = subprocess.Popen(command,

715

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close_fds=True,

716

shell=True, cwd="/")

717

shell=True, cwd="/",

718

**popen_args)

717

719

except OSError as error:

718

720

logger.error("Failed to start subprocess",

719

721

exc_info=error)

722

return True

720

723

self.checker_callback_tag = (gobject.child_watch_add

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724

(self.checker.pid,

722

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self.checker_callback,

723

726

data=command))

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727

# The checker may have completed before the gobject

725

728

# watch was added. Check for this.

726

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

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

727

738

if pid:

728

739

gobject.source_remove(self.checker_callback_tag)

729

740

self.checker_callback(pid, status, command)

765

776

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

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777

if byte_arrays and signature != "ay":

767

778

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

768

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

779

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

769

780

def decorator(func):

770

781

func._dbus_is_property = True

771

782

func._dbus_interface = dbus_interface

819

830

class DBusPropertyException(dbus.exceptions.DBusException):

820

831

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

821

832

"""

822

def __unicode__(self):

823

return unicode(str(self))

824

833

pass

825

834

826

835

class DBusPropertyAccessException(DBusPropertyException):

827

836

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

850

859

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

851

860

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

852

861

"""

853

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

862

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

854

863

False)

855

864

856

865

def _get_all_dbus_things(self, thing):

905

914

# The byte_arrays option is not supported yet on

906

915

# signatures other than "ay".

907

916

if prop._dbus_signature != "ay":

908

raise ValueError

917

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

918

"'ay' signature {!r}"

919

.format(prop._dbus_signature))

909

920

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

910

921

for byte in value))

911

922

prop(value)

975

986

(prop,

976

987

"_dbus_annotations",

977

988

{}))

978

for name, value in annots.iteritems():

989

for name, value in annots.items():

979

990

ann_tag = document.createElement(

980

991

"annotation")

981

992

ann_tag.setAttribute("name", name)

984

995

# Add interface annotation tags

985

996

for annotation, value in dict(

986

997

itertools.chain.from_iterable(

987

annotations().iteritems()

998

annotations().items()

988

999

for name, annotations in

989

1000

self._get_all_dbus_things("interface")

990

1001

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

991

)).iteritems():

1002

)).items():

992

1003

ann_tag = document.createElement("annotation")

993

1004

ann_tag.setAttribute("name", annotation)

994

1005

ann_tag.setAttribute("value", value)

1050

1061

"""

1051

1062

def wrapper(cls):

1052

1063

for orig_interface_name, alt_interface_name in (

1053

alt_interface_names.iteritems()):

1064

alt_interface_names.items()):

1054

1065

attr = {}

1055

1066

interface_names = set()

1056

1067

# Go though all attributes of the class

1069

1080

interface_names.add(alt_interface)

1070

1081

# Is this a D-Bus signal?

1071

1082

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

1072

# Extract the original non-method function by

1073

# black magic

1083

# Extract the original non-method undecorated

1084

# function by black magic

1074

1085

nonmethod_func = (dict(

1075

1086

zip(attribute.func_code.co_freevars,

1076

1087

attribute.__closure__))["func"]

1173

1184

attribute.func_closure)))

1174

1185

if deprecate:

1175

1186

# Deprecate all alternate interfaces

1176

iname="_AlternateDBusNames_interface_annotation{0}"

1187

iname="_AlternateDBusNames_interface_annotation{}"

1177

1188

for interface_name in interface_names:

1178

1189

@dbus_interface_annotations(interface_name)

1179

1190

def func(self):

1188

1199

if interface_names:

1189

1200

# Replace the class with a new subclass of it with

1190

1201

# methods, signals, etc. as created above.

1191

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

1202

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

1192

1203

(cls,), attr)

1193

1204

return cls

1194

1205

return wrapper

1214

1225

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

1215

1226

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

1216

1227

# the D-Bus

1217

client_object_name = unicode(self.name).translate(

1228

client_object_name = str(self.name).translate(

1218

1229

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

1219

1230

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

1220

1231

self.dbus_object_path = (dbus.ObjectPath

1235

1246

to the D-Bus. Default: no transform

1236

1247

variant_level: D-Bus variant level. Default: 1

1237

1248

"""

1238

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

1249

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

1239

1250

def setter(self, value):

1240

1251

if hasattr(self, "dbus_object_path"):

1241

1252

if (not hasattr(self, attrname) or

1271

1282

approval_delay = notifychangeproperty(dbus.UInt64,

1272

1283

"ApprovalDelay",

1273

1284

type_func =

1274

timedelta_to_milliseconds)

1285

lambda td: td.total_seconds()

1286

* 1000)

1275

1287

approval_duration = notifychangeproperty(

1276

1288

dbus.UInt64, "ApprovalDuration",

1277

type_func = timedelta_to_milliseconds)

1289

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

1278

1290

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

1279

1291

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

1280

type_func =

1281

timedelta_to_milliseconds)

1292

type_func = lambda td:

1293

td.total_seconds() * 1000)

1282

1294

extended_timeout = notifychangeproperty(

1283

1295

dbus.UInt64, "ExtendedTimeout",

1284

type_func = timedelta_to_milliseconds)

1296

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

1285

1297

interval = notifychangeproperty(dbus.UInt64,

1286

1298

"Interval",

1287

1299

type_func =

1288

timedelta_to_milliseconds)

1300

lambda td: td.total_seconds()

1301

* 1000)

1289

1302

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

1290

1303

1291

1304

del notifychangeproperty

1319

1332

*args, **kwargs)

1320

1333

1321

1334

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

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

1335

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

1327

1336

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

1328

1337

# Only if new checker process was started

1329

1338

if (self.checker is not None

1338

1347

1339

1348

def approve(self, value=True):

1340

1349

self.approved = value

1341

gobject.timeout_add(timedelta_to_milliseconds

1342

(self.approval_duration),

1343

self._reset_approved)

1350

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

1351

* 1000), self._reset_approved)

1344

1352

self.send_changedstate()

1345

1353

1346

1354

## D-Bus methods, signals & properties

1449

1457

access="readwrite")

1450

1458

def ApprovalDelay_dbus_property(self, value=None):

1451

1459

if value is None: # get

1452

return dbus.UInt64(self.approval_delay_milliseconds())

1460

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

1461

* 1000)

1453

1462

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

1454

1463

1455

1464

# ApprovalDuration - property

1457

1466

access="readwrite")

1458

1467

def ApprovalDuration_dbus_property(self, value=None):

1459

1468

if value is None: # get

1460

return dbus.UInt64(timedelta_to_milliseconds(

1461

self.approval_duration))

1469

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

1470

* 1000)

1462

1471

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

1463

1472

1464

1473

# Name - property

1477

1486

def Host_dbus_property(self, value=None):

1478

1487

if value is None: # get

1479

1488

return dbus.String(self.host)

1480

self.host = unicode(value)

1489

self.host = str(value)

1481

1490

1482

1491

# Created - property

1483

1492

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

1530

1539

access="readwrite")

1531

1540

def Timeout_dbus_property(self, value=None):

1532

1541

if value is None: # get

1533

return dbus.UInt64(self.timeout_milliseconds())

1542

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

1534

1543

old_timeout = self.timeout

1535

1544

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

1536

1545

# Reschedule disabling

1547

1556

gobject.source_remove(self.disable_initiator_tag)

1548

1557

self.disable_initiator_tag = (

1549

1558

gobject.timeout_add(

1550

timedelta_to_milliseconds(self.expires - now),

1551

self.disable))

1559

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

1560

* 1000), self.disable))

1552

1561

1553

1562

# ExtendedTimeout - property

1554

1563

@dbus_service_property(_interface, signature="t",

1555

1564

access="readwrite")

1556

1565

def ExtendedTimeout_dbus_property(self, value=None):

1557

1566

if value is None: # get

1558

return dbus.UInt64(self.extended_timeout_milliseconds())

1567

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

1568

* 1000)

1559

1569

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

1560

1570

1561

1571

# Interval - property

1563

1573

access="readwrite")

1564

1574

def Interval_dbus_property(self, value=None):

1565

1575

if value is None: # get

1566

return dbus.UInt64(self.interval_milliseconds())

1576

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

1567

1577

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

1568

1578

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

1569

1579

return

1580

1590

def Checker_dbus_property(self, value=None):

1581

1591

if value is None: # get

1582

1592

return dbus.String(self.checker_command)

1583

self.checker_command = unicode(value)

1593

self.checker_command = str(value)

1584

1594

1585

1595

# CheckerRunning - property

1586

1596

@dbus_service_property(_interface, signature="b",

1602

1612

@dbus_service_property(_interface, signature="ay",

1603

1613

access="write", byte_arrays=True)

1604

1614

def Secret_dbus_property(self, value):

1605

self.secret = str(value)

1615

self.secret = bytes(value)

1606

1616

1607

1617

del _interface

1608

1618

1642

1652

def handle(self):

1643

1653

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

1644

1654

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

1645

unicode(self.client_address))

1655

str(self.client_address))

1646

1656

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

1647

1657

self.server.child_pipe.fileno())

1648

1658

1674

1684

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

1675

1685

try:

1676

1686

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

1677

raise RuntimeError

1687

raise RuntimeError(line)

1678

1688

except (ValueError, IndexError, RuntimeError) as error:

1679

1689

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

1680

1690

return

1729

1739

if self.server.use_dbus:

1730

1740

# Emit D-Bus signal

1731

1741

client.NeedApproval(

1732

client.approval_delay_milliseconds(),

1733

client.approved_by_default)

1742

client.approval_delay.total_seconds()

1743

* 1000, client.approved_by_default)

1734

1744

else:

1735

1745

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

1736

1746

client.name)

1742

1752

#wait until timeout or approved

1743

1753

time = datetime.datetime.now()

1744

1754

client.changedstate.acquire()

1745

client.changedstate.wait(

1746

float(timedelta_to_milliseconds(delay)

1747

/ 1000))

1755

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

1748

1756

client.changedstate.release()

1749

1757

time2 = datetime.datetime.now()

1750

1758

if (time2 - time) >= delay:

1887

1895

1888

1896

def add_pipe(self, parent_pipe, proc):

1889

1897

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

1890

raise NotImplementedError

1898

raise NotImplementedError()

1891

1899

1892

1900

1893

1901

class IPv6_TCPServer(MultiprocessingMixInWithPipe,

1949

1957

try:

1950

1958

self.socket.setsockopt(socket.SOL_SOCKET,

1951

1959

SO_BINDTODEVICE,

1952

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

1960

(self.interface + "\0")

1961

.encode("utf-8"))

1953

1962

except socket.error as error:

1954

1963

if error.errno == errno.EPERM:

1955

1964

logger.error("No permission to bind to"

1969

1978

if self.address_family == socket.AF_INET6:

1970

1979

any_address = "::" # in6addr_any

1971

1980

else:

1972

any_address = socket.INADDR_ANY

1981

any_address = "0.0.0.0" # INADDR_ANY

1973

1982

self.server_address = (any_address,

1974

1983

self.server_address[1])

1975

1984

elif not self.server_address[1]:

2158

2167

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

2159

2168

frozenset((token_year, token_month,

2160

2169

token_day, token_time,

2161

token_week))),

2170

token_week)))

2162

2171

# Define starting values

2163

2172

value = datetime.timedelta() # Value so far

2164

2173

found_token = None

2165

followers = frozenset(token_duration,) # Following valid tokens

2174

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

2166

2175

s = duration # String left to parse

2167

2176

# Loop until end token is found

2168

2177

while found_token is not token_end:

2215

2224

timevalue = datetime.timedelta(0)

2216

2225

for s in interval.split():

2217

2226

try:

2218

suffix = unicode(s[-1])

2227

suffix = s[-1]

2219

2228

value = int(s[:-1])

2220

2229

if suffix == "d":

2221

2230

delta = datetime.timedelta(value)

2228

2237

elif suffix == "w":

2229

2238

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

2230

2239

else:

2231

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

2240

raise ValueError("Unknown suffix {!r}"

2232

2241

.format(suffix))

2233

except (ValueError, IndexError) as e:

2242

except IndexError as e:

2234

2243

raise ValueError(*(e.args))

2235

2244

timevalue += delta

2236

2245

return timevalue

2251

2260

# Close all standard open file descriptors

2252

2261

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

2253

2262

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

2254

raise OSError(errno.ENODEV,

2255

"{0} not a character device"

2263

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

2256

2264

.format(os.devnull))

2257

2265

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

2258

2266

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

2268

2276

2269

2277

parser = argparse.ArgumentParser()

2270

2278

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

2271

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

2279

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

2272

2280

help="show version number and exit")

2273

2281

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

2274

2282

help="Bind to interface IF")

2280

2288

help="Run self-test")

2281

2289

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

2282

2290

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

2283

" to terminal")

2291

" to terminal", default=None)

2284

2292

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

2285

2293

help="Debug level for stdout output")

2286

2294

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

2293

2301

" files")

2294

2302

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

2295

2303

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

2296

" system bus interface")

2304

" system bus interface", default=None)

2297

2305

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

2298

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

2306

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

2307

default=None)

2299

2308

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

2300

2309

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

2301

" state")

2310

" state", default=None)

2302

2311

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

2303

2312

help="Specify a file descriptor to a network"

2304

2313

" socket to use instead of creating one")

2305

2314

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

2306

2315

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

2307

2316

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

2308

help="Run in foreground")

2317

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

2318

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

2319

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

2320

default=None)

2309

2321

2310

2322

options = parser.parse_args()

2311

2323

2312

2324

if options.check:

2313

2325

import doctest

2314

doctest.testmod()

2315

sys.exit()

2326

fail_count, test_count = doctest.testmod()

2327

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

2316

2328

2317

2329

# Default values for config file for server-global settings

2318

2330

server_defaults = { "interface": "",

2320

2332

"port": "",

2321

2333

"debug": "False",

2322

2334

"priority":

2323

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

2335

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

2324

2336

"servicename": "Mandos",

2325

2337

"use_dbus": "True",

2326

2338

"use_ipv6": "True",

2329

2341

"socket": "",

2330

2342

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

2331

2343

"foreground": "False",

2344

"zeroconf": "True",

2332

2345

}

2333

2346

2334

2347

# Parse config file for server-global settings

2361

2374

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

2362

2375

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

2363

2376

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

2364

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

2377

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

2365

2378

value = getattr(options, option)

2366

2379

if value is not None:

2367

2380

server_settings[option] = value

2368

2381

del options

2369

2382

# Force all strings to be unicode

2370

2383

for option in server_settings.keys():

2371

if type(server_settings[option]) is str:

2372

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

2384

if isinstance(server_settings[option], bytes):

2385

server_settings[option] = (server_settings[option]

2386

.decode("utf-8"))

2387

# Force all boolean options to be boolean

2388

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

2389

"foreground", "zeroconf"):

2390

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

2373

2391

# Debug implies foreground

2374

2392

if server_settings["debug"]:

2375

2393

server_settings["foreground"] = True

2377

2395

2378

2396

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

2379

2397

2398

if (not server_settings["zeroconf"] and

2399

not (server_settings["port"]

2400

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

2401

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

2402

" Zeroconf")

2403

2380

2404

# For convenience

2381

2405

debug = server_settings["debug"]

2382

2406

debuglevel = server_settings["debuglevel"]

2385

2409

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

2386

2410

stored_state_file)

2387

2411

foreground = server_settings["foreground"]

2412

zeroconf = server_settings["zeroconf"]

2388

2413

2389

2414

if debug:

2390

2415

initlogger(debug, logging.DEBUG)

2397

2422

2398

2423

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

2399

2424

syslogger.setFormatter(logging.Formatter

2400

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

2425

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

2401

2426

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

2402

2427

.format(server_settings

2403

2428

["servicename"])))

2411

2436

global mandos_dbus_service

2412

2437

mandos_dbus_service = None

2413

2438

2439

socketfd = None

2440

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

2441

socketfd = server_settings["socket"]

2414

2442

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

2415

2443

server_settings["port"]),

2416

2444

ClientHandler,

2420

2448

gnutls_priority=

2421

2449

server_settings["priority"],

2422

2450

use_dbus=use_dbus,

2423

socketfd=(server_settings["socket"]

2424

or None))

2451

socketfd=socketfd)

2425

2452

if not foreground:

2426

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

2453

pidfilename = "/run/mandos.pid"

2454

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

2455

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

2427

2456

pidfile = None

2428

2457

try:

2429

2458

pidfile = open(pidfilename, "w")

2446

2475

os.setuid(uid)

2447

2476

except OSError as error:

2448

2477

if error.errno != errno.EPERM:

2449

raise error

2478

raise

2450

2479

2451

2480

if debug:

2452

2481

# Enable all possible GnuTLS debugging

2495

2524

use_dbus = False

2496

2525

server_settings["use_dbus"] = False

2497

2526

tcp_server.use_dbus = False

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"])))

2527

if zeroconf:

2528

protocol = avahi.PROTO_INET6 if use_ipv6 else avahi.PROTO_INET

2529

service = AvahiServiceToSyslog(name =

2530

server_settings["servicename"],

2531

servicetype = "_mandos._tcp",

2532

protocol = protocol, bus = bus)

2533

if server_settings["interface"]:

2534

service.interface = (if_nametoindex

2535

(server_settings["interface"]

2536

.encode("utf-8")))

2506

2537

2507

2538

global multiprocessing_manager

2508

2539

multiprocessing_manager = multiprocessing.Manager()

2515

2546

old_client_settings = {}

2516

2547

clients_data = {}

2517

2548

2549

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

2550

global wnull

2551

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

2552

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

2553

# mode

2554

if debug or not foreground:

2555

wnull.close()

2556

2518

2557

# Get client data and settings from last running state.

2519

2558

if server_settings["restore"]:

2520

2559

try:

2524

2563

os.remove(stored_state_path)

2525

2564

except IOError as e:

2526

2565

if e.errno == errno.ENOENT:

2527

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

2566

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

2528

2567

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

2529

2568

else:

2530

2569

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

2535

2574

"EOFError:", exc_info=e)

2536

2575

2537

2576

with PGPEngine() as pgp:

2538

for client_name, client in clients_data.iteritems():

2577

for client_name, client in clients_data.items():

2578

# Skip removed clients

2579

if client_name not in client_settings:

2580

continue

2581

2539

2582

# Decide which value to use after restoring saved state.

2540

2583

# We have three different values: Old config file,

2541

2584

# new config file, and saved state.

2562

2605

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

2563

2606

if not client["last_checked_ok"]:

2564

2607

logger.warning(

2565

"disabling client {0} - Client never "

2608

"disabling client {} - Client never "

2566

2609

"performed a successful checker"

2567

2610

.format(client_name))

2568

2611

client["enabled"] = False

2569

2612

elif client["last_checker_status"] != 0:

2570

2613

logger.warning(

2571

"disabling client {0} - Client "

2572

"last checker failed with error code {1}"

2614

"disabling client {} - Client last"

2615

" checker failed with error code {}"

2573

2616

.format(client_name,

2574

2617

client["last_checker_status"]))

2575

2618

client["enabled"] = False

2578

2621

.utcnow()

2579

2622

+ client["timeout"])

2580

2623

logger.debug("Last checker succeeded,"

2581

" keeping {0} enabled"

2624

" keeping {} enabled"

2582

2625

.format(client_name))

2583

2626

try:

2584

2627

client["secret"] = (

2587

2630

["secret"]))

2588

2631

except PGPError:

2589

2632

# If decryption fails, we use secret from new settings

2590

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

2633

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

2591

2634

.format(client_name))

2592

2635

client["secret"] = (

2593

2636

client_settings[client_name]["secret"])

2601

2644

clients_data[client_name] = client_settings[client_name]

2602

2645

2603

2646

# Create all client objects

2604

for client_name, client in clients_data.iteritems():

2647

for client_name, client in clients_data.items():

2605

2648

tcp_server.clients[client_name] = client_class(

2606

name = client_name, settings = client)

2649

name = client_name, settings = client,

2650

server_settings = server_settings)

2607

2651

2608

2652

if not tcp_server.clients:

2609

2653

logger.warning("No clients defined")

2613

2657

try:

2614

2658

with pidfile:

2615

2659

pid = os.getpid()

2616

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

2660

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

2617

2661

except IOError:

2618

2662

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

2619

2663

pidfilename, pid)

2689

2733

2690

2734

def cleanup():

2691

2735

"Cleanup function; run on exit"

2692

service.cleanup()

2736

if zeroconf:

2737

service.cleanup()

2693

2738

2694

2739

multiprocessing.active_children()

2740

wnull.close()

2695

2741

if not (tcp_server.clients or client_settings):

2696

2742

return

2697

2743

2708

2754

2709

2755

# A list of attributes that can not be pickled

2710

2756

# + secret.

2711

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

2712

"checker"))

2757

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

2758

"checker", "server_settings" }

2713

2759

for name, typ in (inspect.getmembers

2714

2760

(dbus.service.Object)):

2715

2761

exclude.add(name)

2738

2784

except NameError:

2739

2785

pass

2740

2786

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

2741

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

2787

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

2742

2788

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

2743

2789

else:

2744

2790

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

2745

2791

exc_info=e)

2746

raise e

2792

raise

2747

2793

2748

2794

# Delete all clients, and settings from config

2749

2795

while tcp_server.clients:

2773

2819

tcp_server.server_activate()

2774

2820

2775

2821

# Find out what port we got

2776

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

2822

if zeroconf:

2823

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

2777

2824

if use_ipv6:

2778

2825

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

2779

2826

" flowinfo %d, scope_id %d",

2785

2832

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

2786

2833

2787

2834

try:

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

2835

if zeroconf:

2836

# From the Avahi example code

2837

try:

2838

service.activate()

2839

except dbus.exceptions.DBusException as error:

2840

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

2841

cleanup()

2842

sys.exit(1)

2843

# End of Avahi example code

2796

2844

2797

2845

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

2798

2846

lambda *args, **kwargs: