/mandos/release : revision 237.7.127

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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 binascii

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import tempfile

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import itertools

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import collections

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import dbus

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import dbus.service

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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 = "1.6.7"

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version = "1.5.3"

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stored_state_file = "clients.pickle"

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logger = logging.getLogger()

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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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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 = str("/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 __exit__(self, exc_type, exc_value, traceback):

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def __exit__ (self, exc_type, exc_value, traceback):

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self._cleanup()

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return False

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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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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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self.server_state_changed)

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self.server_state_changed(self.server.GetState())

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class AvahiServiceToSyslog(AvahiService):

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def rename(self):

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

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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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"created", "enabled", "expires",

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"fingerprint", "host", "interval",

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"last_approval_request", "last_checked_ok",

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"created", "enabled", "fingerprint",

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"host", "interval", "last_checked_ok",

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"last_enabled", "name", "timeout")

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client_defaults = { "timeout": "PT5M",

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"extended_timeout": "PT15M",

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"interval": "PT2M",

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client_defaults = { "timeout": "5m",

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"extended_timeout": "15m",

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"interval": "2m",

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"checker": "fping -q -- %%(host)s",

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"host": "",

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"approval_delay": "PT0S",

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"approval_duration": "PT1S",

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"approval_delay": "0s",

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"approval_duration": "1s",

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"approved_by_default": "True",

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"enabled": "True",

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}

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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.iteritems():

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setattr(self, setting, value)

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

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# Already enabled

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return

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self.send_changedstate()

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

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self.enabled = True

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self.last_enabled = datetime.datetime.utcnow()

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self.init_checker()

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self.send_changedstate()

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def disable(self, quiet=True):

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"""Disable this client."""

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if not getattr(self, "enabled", False):

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return False

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if not quiet:

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self.send_changedstate()

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if not quiet:

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logger.info("Disabling client %s", self.name)

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if getattr(self, "disable_initiator_tag", None) is not None:

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

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gobject.source_remove(self.disable_initiator_tag)

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self.disable_initiator_tag = None

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self.expires = None

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if getattr(self, "checker_initiator_tag", None) is not None:

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

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gobject.source_remove(self.checker_initiator_tag)

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self.checker_initiator_tag = None

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self.stop_checker()

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self.enabled = False

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if not quiet:

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self.send_changedstate()

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# Do not run this again if called by a gobject.timeout_add

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return False

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def init_checker(self):

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# Schedule a new checker to be started an 'interval' from now,

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# and every interval from then on.

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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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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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timeout = self.timeout

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

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try:

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

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except AttributeError:

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pass

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except OSError as error:

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if error.errno != errno.ECHILD:

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raise

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except (AttributeError, OSError) as error:

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if (isinstance(error, OSError)

675

and error.errno != errno.ECHILD):

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raise error

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else:

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if pid:

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logger.warning("Checker was a zombie")

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self.current_checker_command)

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# Start a new checker if needed

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if self.checker is None:

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# Escape attributes for the shell

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escaped_attrs = dict(

711

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

712

for attr in

713

self.runtime_expansions)

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685

try:

715

command = self.checker_command % escaped_attrs

716

except TypeError as error:

717

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

718

self.checker_command, exc_info=error)

719

return True # Try again later

686

# In case checker_command has exactly one % operator

687

command = self.checker_command % self.host

688

except TypeError:

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# Escape attributes for the shell

690

escaped_attrs = dict(

691

(attr,

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

693

errors=

694

'replace')))

695

for attr in

696

self.runtime_expansions)

697

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try:

699

command = self.checker_command % escaped_attrs

700

except TypeError as error:

701

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

702

self.checker_command, exc_info=error)

703

return True # Try again later

720

704

self.current_checker_command = command

721

705

try:

722

706

logger.info("Starting checker %r for %s",

725

709

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

726

710

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

727

711

# always replaced by /dev/null.)

728

# The exception is when not debugging but nevertheless

729

# running in the foreground; use the previously

730

# created wnull.

731

popen_args = {}

732

if (not self.server_settings["debug"]

733

and self.server_settings["foreground"]):

734

popen_args.update({"stdout": wnull,

735

"stderr": wnull })

736

712

self.checker = subprocess.Popen(command,

737

713

close_fds=True,

738

shell=True, cwd="/",

739

**popen_args)

714

shell=True, cwd="/")

715

self.checker_callback_tag = (gobject.child_watch_add

716

(self.checker.pid,

717

self.checker_callback,

718

data=command))

719

# The checker may have completed before the gobject

720

# watch was added. Check for this.

721

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

722

if pid:

723

gobject.source_remove(self.checker_callback_tag)

724

self.checker_callback(pid, status, command)

740

725

except OSError as error:

741

726

logger.error("Failed to start subprocess",

742

727

exc_info=error)

743

return True

744

self.checker_callback_tag = (gobject.child_watch_add

745

(self.checker.pid,

746

self.checker_callback,

747

data=command))

748

# The checker may have completed before the gobject

749

# watch was added. Check for this.

750

try:

751

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

752

except OSError as error:

753

if error.errno == errno.ECHILD:

754

# This should never happen

755

logger.error("Child process vanished",

756

exc_info=error)

757

return True

758

raise

759

if pid:

760

gobject.source_remove(self.checker_callback_tag)

761

self.checker_callback(pid, status, command)

762

728

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

763

729

return True

764

730

937

903

# The byte_arrays option is not supported yet on

938

904

# signatures other than "ay".

939

905

if prop._dbus_signature != "ay":

940

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

941

"'ay' signature {0!r}"

942

.format(prop._dbus_signature))

906

raise ValueError

943

907

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

944

908

for byte in value))

945

909

prop(value)

1051

1015

return xmlstring

1052

1016

1053

1017

1054

def datetime_to_dbus(dt, variant_level=0):

1018

def datetime_to_dbus (dt, variant_level=0):

1055

1019

"""Convert a UTC datetime.datetime() to a D-Bus type."""

1056

1020

if dt is None:

1057

1021

return dbus.String("", variant_level = variant_level)

1065

1029

interface names according to the "alt_interface_names" mapping.

1066

1030

Usage:

1067

1031

1068

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

1069

"net.example.AlternateInterface"})

1032

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

1033

"net.example.AlternateInterface"})

1070

1034

class SampleDBusObject(dbus.service.Object):

1071

1035

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

1072

1036

def SampleDBusMethod():

1103

1067

interface_names.add(alt_interface)

1104

1068

# Is this a D-Bus signal?

1105

1069

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

1106

# Extract the original non-method undecorated

1107

# function by black magic

1070

# Extract the original non-method function by

1071

# black magic

1108

1072

nonmethod_func = (dict(

1109

1073

zip(attribute.func_code.co_freevars,

1110

1074

attribute.__closure__))["func"]

1353

1317

*args, **kwargs)

1354

1318

1355

1319

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

1356

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

1320

old_checker = self.checker

1321

if self.checker is not None:

1322

old_checker_pid = self.checker.pid

1323

else:

1324

old_checker_pid = None

1357

1325

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

1358

1326

# Only if new checker process was started

1359

1327

if (self.checker is not None

1367

1335

return False

1368

1336

1369

1337

def approve(self, value=True):

1338

self.send_changedstate()

1370

1339

self.approved = value

1371

1340

gobject.timeout_add(timedelta_to_milliseconds

1372

1341

(self.approval_duration),

1373

1342

self._reset_approved)

1374

self.send_changedstate()

1375

1343

1376

1344

## D-Bus methods, signals & properties

1377

1345

_interface = "se.recompile.Mandos.Client"

1561

1529

def Timeout_dbus_property(self, value=None):

1562

1530

if value is None: # get

1563

1531

return dbus.UInt64(self.timeout_milliseconds())

1564

old_timeout = self.timeout

1565

1532

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

1566

# Reschedule disabling

1533

# Reschedule timeout

1567

1534

if self.enabled:

1568

1535

now = datetime.datetime.utcnow()

1569

self.expires += self.timeout - old_timeout

1570

if self.expires <= now:

1536

time_to_die = timedelta_to_milliseconds(

1537

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

1538

if time_to_die <= 0:

1571

1539

# The timeout has passed

1572

1540

self.disable()

1573

1541

else:

1542

self.expires = (now +

1543

datetime.timedelta(milliseconds =

1544

time_to_die))

1574

1545

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

1575

1546

is None):

1576

1547

return

1577

1548

gobject.source_remove(self.disable_initiator_tag)

1578

self.disable_initiator_tag = (

1579

gobject.timeout_add(

1580

timedelta_to_milliseconds(self.expires - now),

1581

self.disable))

1549

self.disable_initiator_tag = (gobject.timeout_add

1550

(time_to_die,

1551

self.disable))

1582

1552

1583

1553

# ExtendedTimeout - property

1584

1554

@dbus_service_property(_interface, signature="t",

1704

1674

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

1705

1675

try:

1706

1676

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

1707

raise RuntimeError(line)

1677

raise RuntimeError

1708

1678

except (ValueError, IndexError, RuntimeError) as error:

1709

1679

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

1710

1680

return

1772

1742

#wait until timeout or approved

1773

1743

time = datetime.datetime.now()

1774

1744

client.changedstate.acquire()

1775

client.changedstate.wait(

1776

float(timedelta_to_milliseconds(delay)

1777

/ 1000))

1745

(client.changedstate.wait

1746

(float(client.timedelta_to_milliseconds(delay)

1747

/ 1000)))

1778

1748

client.changedstate.release()

1779

1749

time2 = datetime.datetime.now()

1780

1750

if (time2 - time) >= delay:

1917

1887

1918

1888

def add_pipe(self, parent_pipe, proc):

1919

1889

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

1920

raise NotImplementedError()

1890

raise NotImplementedError

1921

1891

1922

1892

1923

1893

class IPv6_TCPServer(MultiprocessingMixInWithPipe,

1930

1900

use_ipv6: Boolean; to use IPv6 or not

1931

1901

"""

1932

1902

def __init__(self, server_address, RequestHandlerClass,

1933

interface=None, use_ipv6=True, socketfd=None):

1934

"""If socketfd is set, use that file descriptor instead of

1935

creating a new one with socket.socket().

1936

"""

1903

interface=None, use_ipv6=True):

1937

1904

self.interface = interface

1938

1905

if use_ipv6:

1939

1906

self.address_family = socket.AF_INET6

1940

if socketfd is not None:

1941

# Save the file descriptor

1942

self.socketfd = socketfd

1943

# Save the original socket.socket() function

1944

self.socket_socket = socket.socket

1945

# To implement --socket, we monkey patch socket.socket.

1946

#

1947

# (When socketserver.TCPServer is a new-style class, we

1948

# could make self.socket into a property instead of monkey

1949

# patching socket.socket.)

1950

#

1951

# Create a one-time-only replacement for socket.socket()

1952

@functools.wraps(socket.socket)

1953

def socket_wrapper(*args, **kwargs):

1954

# Restore original function so subsequent calls are

1955

# not affected.

1956

socket.socket = self.socket_socket

1957

del self.socket_socket

1958

# This time only, return a new socket object from the

1959

# saved file descriptor.

1960

return socket.fromfd(self.socketfd, *args, **kwargs)

1961

# Replace socket.socket() function with wrapper

1962

socket.socket = socket_wrapper

1963

# The socketserver.TCPServer.__init__ will call

1964

# socket.socket(), which might be our replacement,

1965

# socket_wrapper(), if socketfd was set.

1966

1907

socketserver.TCPServer.__init__(self, server_address,

1967

1908

RequestHandlerClass)

1968

1969

1909

def server_bind(self):

1970

1910

"""This overrides the normal server_bind() function

1971

1911

to bind to an interface if one was specified, and also NOT to

1979

1919

try:

1980

1920

self.socket.setsockopt(socket.SOL_SOCKET,

1981

1921

SO_BINDTODEVICE,

1982

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

1922

str(self.interface

1923

+ '\0'))

1983

1924

except socket.error as error:

1984

if error.errno == errno.EPERM:

1985

logger.error("No permission to bind to"

1986

" interface %s", self.interface)

1987

elif error.errno == errno.ENOPROTOOPT:

1925

if error[0] == errno.EPERM:

1926

logger.error("No permission to"

1927

" bind to interface %s",

1928

self.interface)

1929

elif error[0] == errno.ENOPROTOOPT:

1988

1930

logger.error("SO_BINDTODEVICE not available;"

1989

1931

" cannot bind to interface %s",

1990

1932

self.interface)

1991

elif error.errno == errno.ENODEV:

1992

logger.error("Interface %s does not exist,"

1993

" cannot bind", self.interface)

1994

1933

else:

1995

1934

raise

1996

1935

# Only bind(2) the socket if we really need to.

1999

1938

if self.address_family == socket.AF_INET6:

2000

1939

any_address = "::" # in6addr_any

2001

1940

else:

2002

any_address = "0.0.0.0" # INADDR_ANY

1941

any_address = socket.INADDR_ANY

2003

1942

self.server_address = (any_address,

2004

1943

self.server_address[1])

2005

1944

elif not self.server_address[1]:

2026

1965

"""

2027

1966

def __init__(self, server_address, RequestHandlerClass,

2028

1967

interface=None, use_ipv6=True, clients=None,

2029

gnutls_priority=None, use_dbus=True, socketfd=None):

1968

gnutls_priority=None, use_dbus=True):

2030

1969

self.enabled = False

2031

1970

self.clients = clients

2032

1971

if self.clients is None:

2036

1975

IPv6_TCPServer.__init__(self, server_address,

2037

1976

RequestHandlerClass,

2038

1977

interface = interface,

2039

use_ipv6 = use_ipv6,

2040

socketfd = socketfd)

1978

use_ipv6 = use_ipv6)

2041

1979

def server_activate(self):

2042

1980

if self.enabled:

2043

1981

return socketserver.TCPServer.server_activate(self)

2121

2059

return True

2122

2060

2123

2061

2124

def rfc3339_duration_to_delta(duration):

2125

"""Parse an RFC 3339 "duration" and return a datetime.timedelta

2126

2127

>>> rfc3339_duration_to_delta("P7D")

2128

datetime.timedelta(7)

2129

>>> rfc3339_duration_to_delta("PT60S")

2130

datetime.timedelta(0, 60)

2131

>>> rfc3339_duration_to_delta("PT60M")

2132

datetime.timedelta(0, 3600)

2133

>>> rfc3339_duration_to_delta("PT24H")

2134

datetime.timedelta(1)

2135

>>> rfc3339_duration_to_delta("P1W")

2136

datetime.timedelta(7)

2137

>>> rfc3339_duration_to_delta("PT5M30S")

2138

datetime.timedelta(0, 330)

2139

>>> rfc3339_duration_to_delta("P1DT3M20S")

2140

datetime.timedelta(1, 200)

2141

"""

2142

2143

# Parsing an RFC 3339 duration with regular expressions is not

2144

# possible - there would have to be multiple places for the same

2145

# values, like seconds. The current code, while more esoteric, is

2146

# cleaner without depending on a parsing library. If Python had a

2147

# built-in library for parsing we would use it, but we'd like to

2148

# avoid excessive use of external libraries.

2149

2150

# New type for defining tokens, syntax, and semantics all-in-one

2151

Token = collections.namedtuple("Token",

2152

("regexp", # To match token; if

2153

# "value" is not None,

2154

# must have a "group"

2155

# containing digits

2156

"value", # datetime.timedelta or

2157

# None

2158

"followers")) # Tokens valid after

2159

# this token

2160

# RFC 3339 "duration" tokens, syntax, and semantics; taken from

2161

# the "duration" ABNF definition in RFC 3339, Appendix A.

2162

token_end = Token(re.compile(r"$"), None, frozenset())

2163

token_second = Token(re.compile(r"(\d+)S"),

2164

datetime.timedelta(seconds=1),

2165

frozenset((token_end,)))

2166

token_minute = Token(re.compile(r"(\d+)M"),

2167

datetime.timedelta(minutes=1),

2168

frozenset((token_second, token_end)))

2169

token_hour = Token(re.compile(r"(\d+)H"),

2170

datetime.timedelta(hours=1),

2171

frozenset((token_minute, token_end)))

2172

token_time = Token(re.compile(r"T"),

2173

None,

2174

frozenset((token_hour, token_minute,

2175

token_second)))

2176

token_day = Token(re.compile(r"(\d+)D"),

2177

datetime.timedelta(days=1),

2178

frozenset((token_time, token_end)))

2179

token_month = Token(re.compile(r"(\d+)M"),

2180

datetime.timedelta(weeks=4),

2181

frozenset((token_day, token_end)))

2182

token_year = Token(re.compile(r"(\d+)Y"),

2183

datetime.timedelta(weeks=52),

2184

frozenset((token_month, token_end)))

2185

token_week = Token(re.compile(r"(\d+)W"),

2186

datetime.timedelta(weeks=1),

2187

frozenset((token_end,)))

2188

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

2189

frozenset((token_year, token_month,

2190

token_day, token_time,

2191

token_week))),

2192

# Define starting values

2193

value = datetime.timedelta() # Value so far

2194

found_token = None

2195

followers = frozenset(token_duration,) # Following valid tokens

2196

s = duration # String left to parse

2197

# Loop until end token is found

2198

while found_token is not token_end:

2199

# Search for any currently valid tokens

2200

for token in followers:

2201

match = token.regexp.match(s)

2202

if match is not None:

2203

# Token found

2204

if token.value is not None:

2205

# Value found, parse digits

2206

factor = int(match.group(1), 10)

2207

# Add to value so far

2208

value += factor * token.value

2209

# Strip token from string

2210

s = token.regexp.sub("", s, 1)

2211

# Go to found token

2212

found_token = token

2213

# Set valid next tokens

2214

followers = found_token.followers

2215

break

2216

else:

2217

# No currently valid tokens were found

2218

raise ValueError("Invalid RFC 3339 duration")

2219

# End token found

2220

return value

2221

2222

2223

2062

def string_to_delta(interval):

2224

2063

"""Parse a string and return a datetime.timedelta

2225

2064

2236

2075

>>> string_to_delta('5m 30s')

2237

2076

datetime.timedelta(0, 330)

2238

2077

"""

2239

2240

try:

2241

return rfc3339_duration_to_delta(interval)

2242

except ValueError:

2243

pass

2244

2245

2078

timevalue = datetime.timedelta(0)

2246

2079

for s in interval.split():

2247

2080

try:

2260

2093

else:

2261

2094

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

2262

2095

.format(suffix))

2263

except IndexError as e:

2096

except (ValueError, IndexError) as e:

2264

2097

raise ValueError(*(e.args))

2265

2098

timevalue += delta

2266

2099

return timevalue

2310

2143

help="Run self-test")

2311

2144

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

2312

2145

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

2313

" to terminal", default=None)

2146

" to terminal")

2314

2147

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

2315

2148

help="Debug level for stdout output")

2316

2149

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

2323

2156

" files")

2324

2157

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

2325

2158

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

2326

" system bus interface", default=None)

2159

" system bus interface")

2327

2160

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

2328

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

2329

default=None)

2161

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

2330

2162

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

2331

2163

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

2332

" state", default=None)

2333

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

2334

help="Specify a file descriptor to a network"

2335

" socket to use instead of creating one")

2164

" state")

2336

2165

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

2337

2166

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

2338

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

2339

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

2340

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

2341

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

2342

default=None)

2343

2167

2344

2168

options = parser.parse_args()

2345

2169

2346

2170

if options.check:

2347

2171

import doctest

2348

fail_count, test_count = doctest.testmod()

2349

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

2172

doctest.testmod()

2173

sys.exit()

2350

2174

2351

2175

# Default values for config file for server-global settings

2352

2176

server_defaults = { "interface": "",

2354

2178

"port": "",

2355

2179

"debug": "False",

2356

2180

"priority":

2357

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

2181

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

2358

2182

"servicename": "Mandos",

2359

2183

"use_dbus": "True",

2360

2184

"use_ipv6": "True",

2361

2185

"debuglevel": "",

2362

2186

"restore": "True",

2363

"socket": "",

2364

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

2365

"foreground": "False",

2366

"zeroconf": "True",

2187

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

2367

2188

}

2368

2189

2369

2190

# Parse config file for server-global settings

2374

2195

# Convert the SafeConfigParser object to a dict

2375

2196

server_settings = server_config.defaults()

2376

2197

# Use the appropriate methods on the non-string config options

2377

for option in ("debug", "use_dbus", "use_ipv6", "foreground"):

2198

for option in ("debug", "use_dbus", "use_ipv6"):

2378

2199

server_settings[option] = server_config.getboolean("DEFAULT",

2379

2200

option)

2380

2201

if server_settings["port"]:

2381

2202

server_settings["port"] = server_config.getint("DEFAULT",

2382

2203

"port")

2383

if server_settings["socket"]:

2384

server_settings["socket"] = server_config.getint("DEFAULT",

2385

"socket")

2386

# Later, stdin will, and stdout and stderr might, be dup'ed

2387

# over with an opened os.devnull. But we don't want this to

2388

# happen with a supplied network socket.

2389

if 0 <= server_settings["socket"] <= 2:

2390

server_settings["socket"] = os.dup(server_settings

2391

["socket"])

2392

2204

del server_config

2393

2205

2394

2206

# Override the settings from the config file with command line

2396

2208

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

2397

2209

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

2398

2210

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

2399

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

2211

"statedir"):

2400

2212

value = getattr(options, option)

2401

2213

if value is not None:

2402

2214

server_settings[option] = value

2405

2217

for option in server_settings.keys():

2406

2218

if type(server_settings[option]) is str:

2407

2219

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

2408

# Force all boolean options to be boolean

2409

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

2410

"foreground", "zeroconf"):

2411

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

2412

# Debug implies foreground

2413

if server_settings["debug"]:

2414

server_settings["foreground"] = True

2415

2220

# Now we have our good server settings in "server_settings"

2416

2221

2417

2222

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

2418

2223

2419

if (not server_settings["zeroconf"] and

2420

not (server_settings["port"]

2421

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

2422

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

2423

" Zeroconf")

2424

2425

2224

# For convenience

2426

2225

debug = server_settings["debug"]

2427

2226

debuglevel = server_settings["debuglevel"]

2429

2228

use_ipv6 = server_settings["use_ipv6"]

2430

2229

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

2431

2230

stored_state_file)

2432

foreground = server_settings["foreground"]

2433

zeroconf = server_settings["zeroconf"]

2434

2231

2435

2232

if debug:

2436

2233

initlogger(debug, logging.DEBUG)

2457

2254

global mandos_dbus_service

2458

2255

mandos_dbus_service = None

2459

2256

2460

socketfd = None

2461

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

2462

socketfd = server_settings["socket"]

2463

2257

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

2464

2258

server_settings["port"]),

2465

2259

ClientHandler,

2468

2262

use_ipv6=use_ipv6,

2469

2263

gnutls_priority=

2470

2264

server_settings["priority"],

2471

use_dbus=use_dbus,

2472

socketfd=socketfd)

2473

if not foreground:

2474

pidfilename = "/run/mandos.pid"

2475

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

2476

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

2477

pidfile = None

2265

use_dbus=use_dbus)

2266

if not debug:

2267

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

2478

2268

try:

2479

2269

pidfile = open(pidfilename, "w")

2480

2270

except IOError as e:

2495

2285

os.setgid(gid)

2496

2286

os.setuid(uid)

2497

2287

except OSError as error:

2498

if error.errno != errno.EPERM:

2499

raise

2288

if error[0] != errno.EPERM:

2289

raise error

2500

2290

2501

2291

if debug:

2502

2292

# Enable all possible GnuTLS debugging

2519

2309

os.close(null)

2520

2310

2521

2311

# Need to fork before connecting to D-Bus

2522

if not foreground:

2312

if not debug:

2523

2313

# Close all input and output, do double fork, etc.

2524

2314

daemon()

2525

2315

2526

# multiprocessing will use threads, so before we use gobject we

2527

# need to inform gobject that threads will be used.

2528

2316

gobject.threads_init()

2529

2317

2530

2318

global main_loop

2545

2333

use_dbus = False

2546

2334

server_settings["use_dbus"] = False

2547

2335

tcp_server.use_dbus = False

2548

if zeroconf:

2549

protocol = avahi.PROTO_INET6 if use_ipv6 else avahi.PROTO_INET

2550

service = AvahiServiceToSyslog(name =

2551

server_settings["servicename"],

2552

servicetype = "_mandos._tcp",

2553

protocol = protocol, bus = bus)

2554

if server_settings["interface"]:

2555

service.interface = (if_nametoindex

2556

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

2336

protocol = avahi.PROTO_INET6 if use_ipv6 else avahi.PROTO_INET

2337

service = AvahiServiceToSyslog(name =

2338

server_settings["servicename"],

2339

servicetype = "_mandos._tcp",

2340

protocol = protocol, bus = bus)

2341

if server_settings["interface"]:

2342

service.interface = (if_nametoindex

2343

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

2557

2344

2558

2345

global multiprocessing_manager

2559

2346

multiprocessing_manager = multiprocessing.Manager()

2566

2353

old_client_settings = {}

2567

2354

clients_data = {}

2568

2355

2569

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

2570

global wnull

2571

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

2572

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

2573

# mode

2574

if debug or not foreground:

2575

wnull.close()

2576

2577

2356

# Get client data and settings from last running state.

2578

2357

if server_settings["restore"]:

2579

2358

try:

2595

2374

2596

2375

with PGPEngine() as pgp:

2597

2376

for client_name, client in clients_data.iteritems():

2598

# Skip removed clients

2599

if client_name not in client_settings:

2600

continue

2601

2602

2377

# Decide which value to use after restoring saved state.

2603

2378

# We have three different values: Old config file,

2604

2379

# new config file, and saved state.

2666

2441

# Create all client objects

2667

2442

for client_name, client in clients_data.iteritems():

2668

2443

tcp_server.clients[client_name] = client_class(

2669

name = client_name, settings = client,

2670

server_settings = server_settings)

2444

name = client_name, settings = client)

2671

2445

2672

2446

if not tcp_server.clients:

2673

2447

logger.warning("No clients defined")

2674

2448

2675

if not foreground:

2676

if pidfile is not None:

2677

try:

2678

with pidfile:

2679

pid = os.getpid()

2680

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

2681

except IOError:

2682

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

2683

pidfilename, pid)

2684

del pidfile

2449

if not debug:

2450

try:

2451

with pidfile:

2452

pid = os.getpid()

2453

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

2454

del pidfile

2455

except IOError:

2456

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

2457

pidfilename, pid)

2458

except NameError:

2459

# "pidfile" was never created

2460

pass

2685

2461

del pidfilename

2462

signal.signal(signal.SIGINT, signal.SIG_IGN)

2686

2463

2687

2464

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

2688

2465

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

2753

2530

2754

2531

def cleanup():

2755

2532

"Cleanup function; run on exit"

2756

if zeroconf:

2757

service.cleanup()

2533

service.cleanup()

2758

2534

2759

2535

multiprocessing.active_children()

2760

wnull.close()

2761

2536

if not (tcp_server.clients or client_settings):

2762

2537

return

2763

2538

2775

2550

# A list of attributes that can not be pickled

2776

2551

# + secret.

2777

2552

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

2778

"checker", "server_settings"))

2553

"checker"))

2779

2554

for name, typ in (inspect.getmembers

2780

2555

(dbus.service.Object)):

2781

2556

exclude.add(name)

2809

2584

else:

2810

2585

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

2811

2586

exc_info=e)

2812

raise

2587

raise e

2813

2588

2814

2589

# Delete all clients, and settings from config

2815

2590

while tcp_server.clients:

2839

2614

tcp_server.server_activate()

2840

2615

2841

2616

# Find out what port we got

2842

if zeroconf:

2843

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

2617

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

2844

2618

if use_ipv6:

2845

2619

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

2846

2620

" flowinfo %d, scope_id %d",

2852

2626

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

2853

2627

2854

2628

try:

2855

if zeroconf:

2856

# From the Avahi example code

2857

try:

2858

service.activate()

2859

except dbus.exceptions.DBusException as error:

2860

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

2861

cleanup()

2862

sys.exit(1)

2863

# End of Avahi example code

2629

# From the Avahi example code

2630

try:

2631

service.activate()

2632

except dbus.exceptions.DBusException as error:

2633

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

2634

cleanup()

2635

sys.exit(1)

2636

# End of Avahi example code

2864

2637

2865

2638

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

2866

2639

lambda *args, **kwargs: