/mandos/release : revision 237.7.671

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#!/usr/bin/python

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

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#

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#

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

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#

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#

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# This program is partly derived from an example program for an Avahi

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# service publisher, downloaded from

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# <http://avahi.org/wiki/PythonPublishExample>. This includes the

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# methods "add", "remove", "server_state_changed",

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# "entry_group_state_changed", "cleanup", and "activate" in the

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

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#

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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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#

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# This file is part of Mandos.

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#

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

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

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# the Free Software Foundation, either version 3 of the License, or

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# (at your option) any later version.

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#

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# This program is distributed in the hope that it will be useful,

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# but WITHOUT ANY WARRANTY; without even the implied warranty of

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# Mandos is distributed in the hope that it will be useful, but

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# WITHOUT ANY WARRANTY; without even the implied warranty of

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# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the

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# GNU General Public License for more details.

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#

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#

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# You should have received a copy of the GNU General Public License

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# along with this program. If not, see

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# <http://www.gnu.org/licenses/>.

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#

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# along with Mandos. If not, see <http://www.gnu.org/licenses/>.

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#

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# Contact the authors at <mandos@recompile.se>.

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#

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#

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from __future__ import (division, absolute_import, print_function,

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unicode_literals)

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import xml.dom.minidom

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import inspect

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# Try to find the value of SO_BINDTODEVICE:

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try:

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# This is where SO_BINDTODEVICE is in Python 3.3 (or 3.4?) and

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# newer, and it is also the most natural place for it:

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SO_BINDTODEVICE = socket.SO_BINDTODEVICE

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except AttributeError:

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try:

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# This is where SO_BINDTODEVICE was up to and including Python

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# 2.6, and also 3.2:

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from IN import SO_BINDTODEVICE

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except ImportError:

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SO_BINDTODEVICE = None

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# In Python 2.7 it seems to have been removed entirely.

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# Try running the C preprocessor:

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try:

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cc = subprocess.Popen(["cc", "--language=c", "-E",

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"/dev/stdin"],

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stdin=subprocess.PIPE,

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stdout=subprocess.PIPE)

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stdout = cc.communicate(

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"#include <sys/socket.h>\nSO_BINDTODEVICE\n")[0]

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SO_BINDTODEVICE = int(stdout.splitlines()[-1])

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except (OSError, ValueError, IndexError):

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# No value found

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SO_BINDTODEVICE = None

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if sys.version_info.major == 2:

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str = unicode

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version = "1.7.6"

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version = "1.8.4"

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stored_state_file = "clients.pickle"

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logger = logging.getLogger()

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if_nametoindex = ctypes.cdll.LoadLibrary(

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ctypes.util.find_library("c")).if_nametoindex

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except (OSError, AttributeError):

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def if_nametoindex(interface):

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"Get an interface index the hard way, i.e. using fcntl()"

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

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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 = logging.handlers.SysLogHandler.LOG_DAEMON,

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address = "/dev/log"))

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facility=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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logger.addHandler(syslogger)

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if debug:

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console = logging.StreamHandler()

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console.setFormatter(logging.Formatter('%(asctime)s %(name)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.tempdir = tempfile.mkdtemp(prefix="mandos-")

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self.gpg = "gpg"

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self.gnupgargs = ['--batch',

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'--homedir', self.tempdir,

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'--force-mdc',

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'--quiet',

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'--no-use-agent']

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'--quiet']

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# Only GPG version 1 has the --no-use-agent option.

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if self.gpg == "gpg" or self.gpg.endswith("/gpg"):

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self.gnupgargs.append("--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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self._cleanup()

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return False

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def __del__(self):

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self._cleanup()

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def _cleanup(self):

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if self.tempdir is not None:

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# Delete contents of tempdir

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for root, dirs, files in os.walk(self.tempdir,

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topdown = False):

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topdown=False):

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for filename in files:

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os.remove(os.path.join(root, filename))

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for dirname in dirs:

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# Remove tempdir

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os.rmdir(self.tempdir)

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self.tempdir = None

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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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.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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passphrase = self.password_encode(password)

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with tempfile.NamedTemporaryFile(

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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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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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passphrase = self.password_encode(password)

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with tempfile.NamedTemporaryFile(

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dir = self.tempdir) as passfile:

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dir=self.tempdir) as passfile:

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passfile.write(passphrase)

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passfile.flush()

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proc = subprocess.Popen([self.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 = data)

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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=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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# Pretend that we have an Avahi module

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class Avahi(object):

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"""This isn't so much a class as it is a module-like namespace.

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It is instantiated once, and simulates having an Avahi module."""

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IF_UNSPEC = -1 # avahi-common/address.h

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PROTO_UNSPEC = -1 # avahi-common/address.h

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PROTO_INET = 0 # avahi-common/address.h

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PROTO_INET6 = 1 # avahi-common/address.h

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class avahi(object):

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"""This isn't so much a class as it is a module-like namespace."""

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IF_UNSPEC = -1 # avahi-common/address.h

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PROTO_UNSPEC = -1 # avahi-common/address.h

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PROTO_INET = 0 # avahi-common/address.h

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PROTO_INET6 = 1 # avahi-common/address.h

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DBUS_NAME = "org.freedesktop.Avahi"

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DBUS_INTERFACE_ENTRY_GROUP = DBUS_NAME + ".EntryGroup"

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DBUS_INTERFACE_SERVER = DBUS_NAME + ".Server"

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DBUS_PATH_SERVER = "/"

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def string_array_to_txt_array(self, t):

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@staticmethod

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def string_array_to_txt_array(t):

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return dbus.Array((dbus.ByteArray(s.encode("utf-8"))

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for s in t), signature="ay")

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ENTRY_GROUP_ESTABLISHED = 2 # avahi-common/defs.h

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ENTRY_GROUP_COLLISION = 3 # avahi-common/defs.h

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ENTRY_GROUP_FAILURE = 4 # avahi-common/defs.h

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SERVER_INVALID = 0 # avahi-common/defs.h

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SERVER_REGISTERING = 1 # avahi-common/defs.h

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SERVER_RUNNING = 2 # avahi-common/defs.h

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SERVER_COLLISION = 3 # avahi-common/defs.h

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SERVER_FAILURE = 4 # avahi-common/defs.h

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avahi = Avahi()

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ENTRY_GROUP_ESTABLISHED = 2 # avahi-common/defs.h

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ENTRY_GROUP_COLLISION = 3 # avahi-common/defs.h

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ENTRY_GROUP_FAILURE = 4 # avahi-common/defs.h

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SERVER_INVALID = 0 # avahi-common/defs.h

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SERVER_REGISTERING = 1 # avahi-common/defs.h

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SERVER_RUNNING = 2 # avahi-common/defs.h

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SERVER_COLLISION = 3 # avahi-common/defs.h

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SERVER_FAILURE = 4 # avahi-common/defs.h

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class AvahiError(Exception):

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def __init__(self, value, *args, **kwargs):

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class AvahiService(object):

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"""An Avahi (Zeroconf) service.

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Attributes:

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interface: integer; avahi.IF_UNSPEC or an interface index.

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Used to optionally bind to the specified interface.

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server: D-Bus Server

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bus: dbus.SystemBus()

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"""

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def __init__(self,

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interface = avahi.IF_UNSPEC,

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name = None,

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servicetype = None,

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port = None,

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TXT = None,

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domain = "",

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host = "",

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max_renames = 32768,

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protocol = avahi.PROTO_UNSPEC,

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bus = None):

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interface=avahi.IF_UNSPEC,

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name=None,

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servicetype=None,

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port=None,

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TXT=None,

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domain="",

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host="",

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max_renames=32768,

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protocol=avahi.PROTO_UNSPEC,

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bus=None):

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self.interface = interface

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self.name = name

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self.type = servicetype

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self.server = None

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self.bus = bus

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self.entry_group_state_changed_match = None

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def rename(self, remove=True):

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

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if self.rename_count >= self.max_renames:

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

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self.cleanup()

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os._exit(1)

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def remove(self):

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

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if self.entry_group_state_changed_match is not None:

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self.entry_group_state_changed_match = None

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if self.group is not None:

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self.group.Reset()

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def add(self):

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

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self.remove()

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dbus.UInt16(self.port),

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avahi.string_array_to_txt_array(self.TXT))

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self.group.Commit()

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def entry_group_state_changed(self, state, error):

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

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

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if state == avahi.ENTRY_GROUP_ESTABLISHED:

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logger.debug("Zeroconf service established.")

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elif state == avahi.ENTRY_GROUP_COLLISION:

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

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str(error))

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raise AvahiGroupError("State changed: {!s}".format(error))

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def cleanup(self):

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

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if self.group is not None:

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pass

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self.group = None

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self.remove()

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

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

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

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

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else:

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

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def activate(self):

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

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if self.server is None:

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class AvahiServiceToSyslog(AvahiService):

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

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

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

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ret = super(AvahiServiceToSyslog, self).rename(*args, **kwargs)

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syslogger.setFormatter(logging.Formatter(

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

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.format(self.name)))

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return ret

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# Pretend that we have a GnuTLS module

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class GnuTLS(object):

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"""This isn't so much a class as it is a module-like namespace.

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It is instantiated once, and simulates having a GnuTLS module."""

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_library = ctypes.cdll.LoadLibrary(

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ctypes.util.find_library("gnutls"))

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_need_version = b"3.3.0"

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def __init__(self):

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# Need to use class name "GnuTLS" here, since this method is

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# called before the assignment to the "gnutls" global variable

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# happens.

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if GnuTLS.check_version(self._need_version) is None:

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raise GnuTLS.Error("Needs GnuTLS {} or later"

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.format(self._need_version))

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class gnutls(object):

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"""This isn't so much a class as it is a module-like namespace."""

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library = ctypes.util.find_library("gnutls")

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if library is None:

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library = ctypes.util.find_library("gnutls-deb0")

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_library = ctypes.cdll.LoadLibrary(library)

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del library

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# Unless otherwise indicated, the constants and types below are

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# all from the gnutls/gnutls.h C header file.

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# Constants

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E_SUCCESS = 0

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E_INTERRUPTED = -52

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E_AGAIN = -28

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CRT_OPENPGP = 2

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CRT_RAWPK = 3

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CLIENT = 2

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SHUT_RDWR = 0

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CRD_CERTIFICATE = 1

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E_NO_CERTIFICATE_FOUND = -49

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X509_FMT_DER = 0

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NO_TICKETS = 1<<10

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ENABLE_RAWPK = 1<<18

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CTYPE_PEERS = 3

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KEYID_USE_SHA256 = 1 # gnutls/x509.h

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OPENPGP_FMT_RAW = 0 # gnutls/openpgp.h

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# Types

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class session_int(ctypes.Structure):

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_fields_ = []

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session_t = ctypes.POINTER(session_int)

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class certificate_credentials_st(ctypes.Structure):

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_fields_ = []

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certificate_credentials_t = ctypes.POINTER(

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certificate_credentials_st)

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certificate_type_t = ctypes.c_int

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class datum_t(ctypes.Structure):

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_fields_ = [('data', ctypes.POINTER(ctypes.c_ubyte)),

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('size', ctypes.c_uint)]

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class openpgp_crt_int(ctypes.Structure):

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_fields_ = []

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openpgp_crt_t = ctypes.POINTER(openpgp_crt_int)

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openpgp_crt_fmt_t = ctypes.c_int # gnutls/openpgp.h

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openpgp_crt_fmt_t = ctypes.c_int # gnutls/openpgp.h

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log_func = ctypes.CFUNCTYPE(None, ctypes.c_int, ctypes.c_char_p)

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credentials_type_t = ctypes.c_int

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transport_ptr_t = ctypes.c_void_p

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close_request_t = ctypes.c_int

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# Exceptions

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class Error(Exception):

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# We need to use the class name "GnuTLS" here, since this

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# exception might be raised from within GnuTLS.__init__,

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# which is called before the assignment to the "gnutls"

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# global variable has happened.

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def __init__(self, message = None, code = None, args=()):

561

def __init__(self, message=None, code=None, args=()):

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# Default usage is by a message string, but if a return

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# code is passed, convert it to a string with

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# gnutls.strerror()

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self.code = code

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if message is None and code is not None:

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message = GnuTLS.strerror(code)

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return super(GnuTLS.Error, self).__init__(

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message = gnutls.strerror(code)

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return super(gnutls.Error, self).__init__(

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message, *args)

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class CertificateSecurityError(Error):

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pass

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# Classes

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class Credentials(object):

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def __init__(self):

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gnutls.certificate_allocate_credentials(

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ctypes.byref(self._c_object))

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self.type = gnutls.CRD_CERTIFICATE

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def __del__(self):

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gnutls.certificate_free_credentials(self._c_object)

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class ClientSession(object):

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def __init__(self, socket, credentials = None):

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def __init__(self, socket, credentials=None):

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self._c_object = gnutls.session_t()

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gnutls.init(ctypes.byref(self._c_object), gnutls.CLIENT)

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gnutls_flags = gnutls.CLIENT

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if gnutls.check_version("3.5.6"):

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gnutls_flags |= gnutls.NO_TICKETS

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if gnutls.has_rawpk:

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gnutls_flags |= gnutls.ENABLE_RAWPK

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gnutls.init(ctypes.byref(self._c_object), gnutls_flags)

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del gnutls_flags

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gnutls.set_default_priority(self._c_object)

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gnutls.transport_set_ptr(self._c_object, socket.fileno())

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gnutls.handshake_set_private_extensions(self._c_object,

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ctypes.cast(credentials._c_object,

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ctypes.c_void_p))

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self.credentials = credentials

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def __del__(self):

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gnutls.deinit(self._c_object)

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def handshake(self):

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return gnutls.handshake(self._c_object)

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def send(self, data):

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data = bytes(data)

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data_len = len(data)

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data_len -= gnutls.record_send(self._c_object,

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data[-data_len:],

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data_len)

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def bye(self):

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return gnutls.bye(self._c_object, gnutls.SHUT_RDWR)

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# Error handling functions

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def _error_code(result):

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"""A function to raise exceptions on errors, suitable

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if result >= 0:

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return result

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if result == gnutls.E_NO_CERTIFICATE_FOUND:

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raise gnutls.CertificateSecurityError(code = result)

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raise gnutls.Error(code = result)

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raise gnutls.CertificateSecurityError(code=result)

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raise gnutls.Error(code=result)

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def _retry_on_error(result, func, arguments):

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"""A function to retry on some errors, suitable

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for the 'errcheck' attribute on ctypes functions"""

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return _error_code(result)

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result = func(*arguments)

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return result

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# Unless otherwise indicated, the function declarations below are

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# all from the gnutls/gnutls.h C header file.

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# Functions

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priority_set_direct = _library.gnutls_priority_set_direct

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priority_set_direct.argtypes = [session_t, ctypes.c_char_p,

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ctypes.POINTER(ctypes.c_char_p)]

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priority_set_direct.restype = _error_code

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652

init = _library.gnutls_init

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init.argtypes = [ctypes.POINTER(session_t), ctypes.c_int]

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init.restype = _error_code

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655

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set_default_priority = _library.gnutls_set_default_priority

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set_default_priority.argtypes = [session_t]

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set_default_priority.restype = _error_code

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record_send = _library.gnutls_record_send

633

661

record_send.argtypes = [session_t, ctypes.c_void_p,

634

662

ctypes.c_size_t]

635

663

record_send.restype = ctypes.c_ssize_t

636

664

record_send.errcheck = _retry_on_error

637

665

638

666

certificate_allocate_credentials = (

639

667

_library.gnutls_certificate_allocate_credentials)

640

668

certificate_allocate_credentials.argtypes = [

641

669

ctypes.POINTER(certificate_credentials_t)]

642

670

certificate_allocate_credentials.restype = _error_code

643

671

644

672

certificate_free_credentials = (

645

673

_library.gnutls_certificate_free_credentials)

646

certificate_free_credentials.argtypes = [certificate_credentials_t]

674

certificate_free_credentials.argtypes = [

675

certificate_credentials_t]

647

676

certificate_free_credentials.restype = None

648

677

649

678

handshake_set_private_extensions = (

650

679

_library.gnutls_handshake_set_private_extensions)

651

680

handshake_set_private_extensions.argtypes = [session_t,

652

681

ctypes.c_int]

653

682

handshake_set_private_extensions.restype = None

654

683

655

684

credentials_set = _library.gnutls_credentials_set

656

685

credentials_set.argtypes = [session_t, credentials_type_t,

657

686

ctypes.c_void_p]

658

687

credentials_set.restype = _error_code

659

688

660

689

strerror = _library.gnutls_strerror

661

690

strerror.argtypes = [ctypes.c_int]

662

691

strerror.restype = ctypes.c_char_p

663

692

664

693

certificate_type_get = _library.gnutls_certificate_type_get

665

694

certificate_type_get.argtypes = [session_t]

666

695

certificate_type_get.restype = _error_code

667

696

668

697

certificate_get_peers = _library.gnutls_certificate_get_peers

669

698

certificate_get_peers.argtypes = [session_t,

670

699

ctypes.POINTER(ctypes.c_uint)]

671

700

certificate_get_peers.restype = ctypes.POINTER(datum_t)

672

701

673

702

global_set_log_level = _library.gnutls_global_set_log_level

674

703

global_set_log_level.argtypes = [ctypes.c_int]

675

704

global_set_log_level.restype = None

676

705

677

706

global_set_log_function = _library.gnutls_global_set_log_function

678

707

global_set_log_function.argtypes = [log_func]

679

708

global_set_log_function.restype = None

680

709

681

710

deinit = _library.gnutls_deinit

682

711

deinit.argtypes = [session_t]

683

712

deinit.restype = None

684

713

685

714

handshake = _library.gnutls_handshake

686

715

handshake.argtypes = [session_t]

687

716

handshake.restype = _error_code

688

717

handshake.errcheck = _retry_on_error

689

718

690

719

transport_set_ptr = _library.gnutls_transport_set_ptr

691

720

transport_set_ptr.argtypes = [session_t, transport_ptr_t]

692

721

transport_set_ptr.restype = None

693

722

694

723

bye = _library.gnutls_bye

695

724

bye.argtypes = [session_t, close_request_t]

696

725

bye.restype = _error_code

697

726

bye.errcheck = _retry_on_error

698

727

699

728

check_version = _library.gnutls_check_version

700

729

check_version.argtypes = [ctypes.c_char_p]

701

730

check_version.restype = ctypes.c_char_p

702

703

# All the function declarations below are from gnutls/openpgp.h

704

705

openpgp_crt_init = _library.gnutls_openpgp_crt_init

706

openpgp_crt_init.argtypes = [ctypes.POINTER(openpgp_crt_t)]

707

openpgp_crt_init.restype = _error_code

708

709

openpgp_crt_import = _library.gnutls_openpgp_crt_import

710

openpgp_crt_import.argtypes = [openpgp_crt_t,

711

ctypes.POINTER(datum_t),

712

openpgp_crt_fmt_t]

713

openpgp_crt_import.restype = _error_code

714

715

openpgp_crt_verify_self = _library.gnutls_openpgp_crt_verify_self

716

openpgp_crt_verify_self.argtypes = [openpgp_crt_t, ctypes.c_uint,

717

ctypes.POINTER(ctypes.c_uint)]

718

openpgp_crt_verify_self.restype = _error_code

719

720

openpgp_crt_deinit = _library.gnutls_openpgp_crt_deinit

721

openpgp_crt_deinit.argtypes = [openpgp_crt_t]

722

openpgp_crt_deinit.restype = None

723

724

openpgp_crt_get_fingerprint = (

725

_library.gnutls_openpgp_crt_get_fingerprint)

726

openpgp_crt_get_fingerprint.argtypes = [openpgp_crt_t,

727

ctypes.c_void_p,

728

ctypes.POINTER(

729

ctypes.c_size_t)]

730

openpgp_crt_get_fingerprint.restype = _error_code

731

732

_need_version = b"3.3.0"

733

if check_version(_need_version) is None:

734

raise self.Error("Needs GnuTLS {} or later"

735

.format(_need_version))

736

737

_tls_rawpk_version = b"3.6.6"

738

has_rawpk = bool(check_version(_tls_rawpk_version))

739

740

if has_rawpk:

741

# Types

742

class pubkey_st(ctypes.Structure):

743

_fields = []

744

pubkey_t = ctypes.POINTER(pubkey_st)

745

746

x509_crt_fmt_t = ctypes.c_int

747

748

# All the function declarations below are from gnutls/abstract.h

749

pubkey_init = _library.gnutls_pubkey_init

750

pubkey_init.argtypes = [ctypes.POINTER(pubkey_t)]

751

pubkey_init.restype = _error_code

752

753

pubkey_import = _library.gnutls_pubkey_import

754

pubkey_import.argtypes = [pubkey_t, ctypes.POINTER(datum_t),

755

x509_crt_fmt_t]

756

pubkey_import.restype = _error_code

757

758

pubkey_get_key_id = _library.gnutls_pubkey_get_key_id

759

pubkey_get_key_id.argtypes = [pubkey_t, ctypes.c_int,

760

ctypes.POINTER(ctypes.c_ubyte),

761

ctypes.POINTER(ctypes.c_size_t)]

762

pubkey_get_key_id.restype = _error_code

763

764

pubkey_deinit = _library.gnutls_pubkey_deinit

765

pubkey_deinit.argtypes = [pubkey_t]

766

pubkey_deinit.restype = None

767

else:

768

# All the function declarations below are from gnutls/openpgp.h

769

770

openpgp_crt_init = _library.gnutls_openpgp_crt_init

771

openpgp_crt_init.argtypes = [ctypes.POINTER(openpgp_crt_t)]

772

openpgp_crt_init.restype = _error_code

773

774

openpgp_crt_import = _library.gnutls_openpgp_crt_import

775

openpgp_crt_import.argtypes = [openpgp_crt_t,

776

ctypes.POINTER(datum_t),

777

openpgp_crt_fmt_t]

778

openpgp_crt_import.restype = _error_code

779

780

openpgp_crt_verify_self = _library.gnutls_openpgp_crt_verify_self

781

openpgp_crt_verify_self.argtypes = [openpgp_crt_t, ctypes.c_uint,

782

ctypes.POINTER(ctypes.c_uint)]

783

openpgp_crt_verify_self.restype = _error_code

784

785

openpgp_crt_deinit = _library.gnutls_openpgp_crt_deinit

786

openpgp_crt_deinit.argtypes = [openpgp_crt_t]

787

openpgp_crt_deinit.restype = None

788

789

openpgp_crt_get_fingerprint = (

790

_library.gnutls_openpgp_crt_get_fingerprint)

791

openpgp_crt_get_fingerprint.argtypes = [openpgp_crt_t,

792

ctypes.c_void_p,

793

ctypes.POINTER(

794

ctypes.c_size_t)]

795

openpgp_crt_get_fingerprint.restype = _error_code

796

797

if check_version("3.6.4"):

798

certificate_type_get2 = _library.gnutls_certificate_type_get2

799

certificate_type_get2.argtypes = [session_t, ctypes.c_int]

800

certificate_type_get2.restype = _error_code

801

732

802

# Remove non-public functions

733

803

del _error_code, _retry_on_error

734

# Create the global "gnutls" object, simulating a module

735

gnutls = GnuTLS()

804

736

805

737

806

def call_pipe(connection, # : multiprocessing.Connection

738

807

func, *args, **kwargs):

739

808

"""This function is meant to be called by multiprocessing.Process

740

809

741

810

This function runs func(*args, **kwargs), and writes the resulting

742

811

return value on the provided multiprocessing.Connection.

743

812

"""

744

813

connection.send(func(*args, **kwargs))

745

814

connection.close()

746

815

816

747

817

class Client(object):

748

818

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

749

819

750

820

Attributes:

751

821

approved: bool(); 'None' if not yet approved/disapproved

752

822

approval_delay: datetime.timedelta(); Time to wait for approval

767

837

disable_initiator_tag: a GLib event source tag, or None

768

838

enabled: bool()

769

839

fingerprint: string (40 or 32 hexadecimal digits); used to

770

uniquely identify the client

840

uniquely identify an OpenPGP client

841

key_id: string (64 hexadecimal digits); used to uniquely identify

842

a client using raw public keys

771

843

host: string; available for use by the checker command

772

844

interval: datetime.timedelta(); How often to start a new checker

773

845

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

789

861

disabled, or None

790

862

server_settings: The server_settings dict from main()

791

863

"""

792

864

793

865

runtime_expansions = ("approval_delay", "approval_duration",

794

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

866

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

795

867

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

796

868

"last_approval_request", "last_checked_ok",

797

869

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

806

878

"approved_by_default": "True",

807

879

"enabled": "True",

808

880

}

809

881

810

882

@staticmethod

811

883

def config_parser(config):

812

884

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

819

891

for client_name in config.sections():

820

892

section = dict(config.items(client_name))

821

893

client = settings[client_name] = {}

822

894

823

895

client["host"] = section["host"]

824

896

# Reformat values from string types to Python types

825

897

client["approved_by_default"] = config.getboolean(

826

898

client_name, "approved_by_default")

827

899

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

828

900

"enabled")

829

830

# Uppercase and remove spaces from fingerprint for later

831

# comparison purposes with return value from the

832

# fingerprint() function

901

902

# Uppercase and remove spaces from key_id and fingerprint

903

# for later comparison purposes with return value from the

904

# key_id() and fingerprint() functions

905

client["key_id"] = (section.get("key_id", "").upper()

906

.replace(" ", ""))

833

907

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

834

908

.replace(" ", ""))

835

909

if "secret" in section:

856

930

client["last_approval_request"] = None

857

931

client["last_checked_ok"] = None

858

932

client["last_checker_status"] = -2

859

933

860

934

return settings

861

862

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

935

936

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

863

937

self.name = name

864

938

if server_settings is None:

865

939

server_settings = {}

867

941

# adding all client settings

868

942

for setting, value in settings.items():

869

943

setattr(self, setting, value)

870

944

871

945

if self.enabled:

872

946

if not hasattr(self, "last_enabled"):

873

947

self.last_enabled = datetime.datetime.utcnow()

877

951

else:

878

952

self.last_enabled = None

879

953

self.expires = None

880

954

881

955

logger.debug("Creating client %r", self.name)

956

logger.debug(" Key ID: %s", self.key_id)

882

957

logger.debug(" Fingerprint: %s", self.fingerprint)

883

958

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

884

959

datetime.datetime.utcnow())

885

960

886

961

# attributes specific for this server instance

887

962

self.checker = None

888

963

self.checker_initiator_tag = None

897

972

for attr in self.__dict__.keys()

898

973

if not attr.startswith("_")]

899

974

self.client_structure.append("client_structure")

900

975

901

976

for name, t in inspect.getmembers(

902

977

type(self), lambda obj: isinstance(obj, property)):

903

978

if not name.startswith("_"):

904

979

self.client_structure.append(name)

905

980

906

981

# Send notice to process children that client state has changed

907

982

def send_changedstate(self):

908

983

with self.changedstate:

909

984

self.changedstate.notify_all()

910

985

911

986

def enable(self):

912

987

"""Start this client's checker and timeout hooks"""

913

988

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

918

993

self.last_enabled = datetime.datetime.utcnow()

919

994

self.init_checker()

920

995

self.send_changedstate()

921

996

922

997

def disable(self, quiet=True):

923

998

"""Disable this client."""

924

999

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

938

1013

self.send_changedstate()

939

1014

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

940

1015

return False

941

1016

942

1017

def __del__(self):

943

1018

self.disable()

944

1019

945

1020

def init_checker(self):

946

1021

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

947

1022

# and every interval from then on.

957

1032

int(self.timeout.total_seconds() * 1000), self.disable)

958

1033

# Also start a new checker *right now*.

959

1034

self.start_checker()

960

1035

961

1036

def checker_callback(self, source, condition, connection,

962

1037

command):

963

1038

"""The checker has completed, so take appropriate actions."""

966

1041

# Read return code from connection (see call_pipe)

967

1042

returncode = connection.recv()

968

1043

connection.close()

969

1044

970

1045

if returncode >= 0:

971

1046

self.last_checker_status = returncode

972

1047

self.last_checker_signal = None

982

1057

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

983

1058

vars(self))

984

1059

return False

985

1060

986

1061

def checked_ok(self):

987

1062

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

988

1063

self.last_checked_ok = datetime.datetime.utcnow()

989

1064

self.last_checker_status = 0

990

1065

self.last_checker_signal = None

991

1066

self.bump_timeout()

992

1067

993

1068

def bump_timeout(self, timeout=None):

994

1069

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

995

1070

if timeout is None:

1001

1076

self.disable_initiator_tag = GLib.timeout_add(

1002

1077

int(timeout.total_seconds() * 1000), self.disable)

1003

1078

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

1004

1079

1005

1080

def need_approval(self):

1006

1081

self.last_approval_request = datetime.datetime.utcnow()

1007

1082

1008

1083

def start_checker(self):

1009

1084

"""Start a new checker subprocess if one is not running.

1010

1085

1011

1086

If a checker already exists, leave it running and do

1012

1087

nothing."""

1013

1088

# The reason for not killing a running checker is that if we

1018

1093

# checkers alone, the checker would have to take more time

1019

1094

# than 'timeout' for the client to be disabled, which is as it

1020

1095

# should be.

1021

1096

1022

1097

if self.checker is not None and not self.checker.is_alive():

1023

1098

logger.warning("Checker was not alive; joining")

1024

1099

self.checker.join()

1028

1103

# Escape attributes for the shell

1029

1104

escaped_attrs = {

1030

1105

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

1031

for attr in self.runtime_expansions }

1106

for attr in self.runtime_expansions}

1032

1107

try:

1033

1108

command = self.checker_command % escaped_attrs

1034

1109

except TypeError as error:

1046

1121

# The exception is when not debugging but nevertheless

1047

1122

# running in the foreground; use the previously

1048

1123

# created wnull.

1049

popen_args = { "close_fds": True,

1050

"shell": True,

1051

"cwd": "/" }

1124

popen_args = {"close_fds": True,

1125

"shell": True,

1126

"cwd": "/"}

1052

1127

if (not self.server_settings["debug"]

1053

1128

and self.server_settings["foreground"]):

1054

1129

popen_args.update({"stdout": wnull,

1055

"stderr": wnull })

1056

pipe = multiprocessing.Pipe(duplex = False)

1130

"stderr": wnull})

1131

pipe = multiprocessing.Pipe(duplex=False)

1057

1132

self.checker = multiprocessing.Process(

1058

target = call_pipe,

1059

args = (pipe[1], subprocess.call, command),

1060

kwargs = popen_args)

1133

target=call_pipe,

1134

args=(pipe[1], subprocess.call, command),

1135

kwargs=popen_args)

1061

1136

self.checker.start()

1062

1137

self.checker_callback_tag = GLib.io_add_watch(

1063

1138

pipe[0].fileno(), GLib.IO_IN,

1064

1139

self.checker_callback, pipe[0], command)

1065

1140

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

1066

1141

return True

1067

1142

1068

1143

def stop_checker(self):

1069

1144

"""Force the checker process, if any, to stop."""

1070

1145

if self.checker_callback_tag:

1083

1158

byte_arrays=False):

1084

1159

"""Decorators for marking methods of a DBusObjectWithProperties to

1085

1160

become properties on the D-Bus.

1086

1161

1087

1162

The decorated method will be called with no arguments by "Get"

1088

1163

and with one argument by "Set".

1089

1164

1090

1165

The parameters, where they are supported, are the same as

1091

1166

dbus.service.method, except there is only "signature", since the

1092

1167

type from Get() and the type sent to Set() is the same.

1096

1171

if byte_arrays and signature != "ay":

1097

1172

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

1098

1173

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

1099

1174

1100

1175

def decorator(func):

1101

1176

func._dbus_is_property = True

1102

1177

func._dbus_interface = dbus_interface

1105

1180

func._dbus_name = func.__name__

1106

1181

if func._dbus_name.endswith("_dbus_property"):

1107

1182

func._dbus_name = func._dbus_name[:-14]

1108

func._dbus_get_args_options = {'byte_arrays': byte_arrays }

1183

func._dbus_get_args_options = {'byte_arrays': byte_arrays}

1109

1184

return func

1110

1185

1111

1186

return decorator

1112

1187

1113

1188

1114

1189

def dbus_interface_annotations(dbus_interface):

1115

1190

"""Decorator for marking functions returning interface annotations

1116

1191

1117

1192

Usage:

1118

1193

1119

1194

@dbus_interface_annotations("org.example.Interface")

1120

1195

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

1121

1196

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

1122

1197

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

1123

1198

"false"}

1124

1199

"""

1125

1200

1126

1201

def decorator(func):

1127

1202

func._dbus_is_interface = True

1128

1203

func._dbus_interface = dbus_interface

1129

1204

func._dbus_name = dbus_interface

1130

1205

return func

1131

1206

1132

1207

return decorator

1133

1208

1134

1209

1135

1210

def dbus_annotations(annotations):

1136

1211

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

1137

1212

Usage:

1138

1213

1139

1214

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

1140

1215

"org.freedesktop.DBus.Property."

1141

1216

"EmitsChangedSignal": "false"})

1143

1218

access="r")

1144

1219

def Property_dbus_property(self):

1145

1220

return dbus.Boolean(False)

1146

1221

1147

1222

See also the DBusObjectWithAnnotations class.

1148

1223

"""

1149

1224

1150

1225

def decorator(func):

1151

1226

func._dbus_annotations = annotations

1152

1227

return func

1153

1228

1154

1229

return decorator

1155

1230

1156

1231

1174

1249

1175

1250

class DBusObjectWithAnnotations(dbus.service.Object):

1176

1251

"""A D-Bus object with annotations.

1177

1252

1178

1253

Classes inheriting from this can use the dbus_annotations

1179

1254

decorator to add annotations to methods or signals.

1180

1255

"""

1181

1256

1182

1257

@staticmethod

1183

1258

def _is_dbus_thing(thing):

1184

1259

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

1185

1260

1186

1261

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

1187

1262

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

1188

1263

"""

1189

1264

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

1190

1265

False)

1191

1266

1192

1267

def _get_all_dbus_things(self, thing):

1193

1268

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

1194

1269

"""

1197

1272

for cls in self.__class__.__mro__

1198

1273

for name, athing in

1199

1274

inspect.getmembers(cls, self._is_dbus_thing(thing)))

1200

1275

1201

1276

@dbus.service.method(dbus.INTROSPECTABLE_IFACE,

1202

out_signature = "s",

1203

path_keyword = 'object_path',

1204

connection_keyword = 'connection')

1277

out_signature="s",

1278

path_keyword='object_path',

1279

connection_keyword='connection')

1205

1280

def Introspect(self, object_path, connection):

1206

1281

"""Overloading of standard D-Bus method.

1207

1282

1208

1283

Inserts annotation tags on methods and signals.

1209

1284

"""

1210

1285

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

1211

1286

connection)

1212

1287

try:

1213

1288

document = xml.dom.minidom.parseString(xmlstring)

1214

1289

1215

1290

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

1216

1291

# Add annotation tags

1217

1292

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

1244

1319

if_tag.appendChild(ann_tag)

1245

1320

# Fix argument name for the Introspect method itself

1246

1321

if (if_tag.getAttribute("name")

1247

== dbus.INTROSPECTABLE_IFACE):

1322

== dbus.INTROSPECTABLE_IFACE):

1248

1323

for cn in if_tag.getElementsByTagName("method"):

1249

1324

if cn.getAttribute("name") == "Introspect":

1250

1325

for arg in cn.getElementsByTagName("arg"):

1263

1338

1264

1339

class DBusObjectWithProperties(DBusObjectWithAnnotations):

1265

1340

"""A D-Bus object with properties.

1266

1341

1267

1342

Classes inheriting from this can use the dbus_service_property

1268

1343

decorator to expose methods as D-Bus properties. It exposes the

1269

1344

standard Get(), Set(), and GetAll() methods on the D-Bus.

1270

1345

"""

1271

1346

1272

1347

def _get_dbus_property(self, interface_name, property_name):

1273

1348

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

1274

1349

property with the specified name and interface.

1279

1354

if (value._dbus_name == property_name

1280

1355

and value._dbus_interface == interface_name):

1281

1356

return value.__get__(self)

1282

1357

1283

1358

# No such property

1284

1359

raise DBusPropertyNotFound("{}:{}.{}".format(

1285

1360

self.dbus_object_path, interface_name, property_name))

1286

1361

1287

1362

@classmethod

1288

1363

def _get_all_interface_names(cls):

1289

1364

"""Get a sequence of all interfaces supported by an object"""

1292

1367

for x in (inspect.getmro(cls))

1293

1368

for attr in dir(x))

1294

1369

if name is not None)

1295

1370

1296

1371

@dbus.service.method(dbus.PROPERTIES_IFACE,

1297

1372

in_signature="ss",

1298

1373

out_signature="v")

1306

1381

if not hasattr(value, "variant_level"):

1307

1382

return value

1308

1383

return type(value)(value, variant_level=value.variant_level+1)

1309

1384

1310

1385

@dbus.service.method(dbus.PROPERTIES_IFACE, in_signature="ssv")

1311

1386

def Set(self, interface_name, property_name, value):

1312

1387

"""Standard D-Bus property Set() method, see D-Bus standard.

1324

1399

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

1325

1400

for byte in value))

1326

1401

prop(value)

1327

1402

1328

1403

@dbus.service.method(dbus.PROPERTIES_IFACE,

1329

1404

in_signature="s",

1330

1405

out_signature="a{sv}")

1331

1406

def GetAll(self, interface_name):

1332

1407

"""Standard D-Bus property GetAll() method, see D-Bus

1333

1408

standard.

1334

1409

1335

1410

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

1336

1411

"""

1337

1412

properties = {}

1348

1423

properties[name] = value

1349

1424

continue

1350

1425

properties[name] = type(value)(

1351

value, variant_level = value.variant_level + 1)

1426

value, variant_level=value.variant_level + 1)

1352

1427

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

1353

1428

1354

1429

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

1355

1430

def PropertiesChanged(self, interface_name, changed_properties,

1356

1431

invalidated_properties):

1358

1433

standard.

1359

1434

"""

1360

1435

pass

1361

1436

1362

1437

@dbus.service.method(dbus.INTROSPECTABLE_IFACE,

1363

1438

out_signature="s",

1364

1439

path_keyword='object_path',

1365

1440

connection_keyword='connection')

1366

1441

def Introspect(self, object_path, connection):

1367

1442

"""Overloading of standard D-Bus method.

1368

1443

1369

1444

Inserts property tags and interface annotation tags.

1370

1445

"""

1371

1446

xmlstring = DBusObjectWithAnnotations.Introspect(self,

1373

1448

connection)

1374

1449

try:

1375

1450

document = xml.dom.minidom.parseString(xmlstring)

1376

1451

1377

1452

def make_tag(document, name, prop):

1378

1453

e = document.createElement("property")

1379

1454

e.setAttribute("name", name)

1380

1455

e.setAttribute("type", prop._dbus_signature)

1381

1456

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

1382

1457

return e

1383

1458

1384

1459

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

1385

1460

# Add property tags

1386

1461

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

1428

1503

exc_info=error)

1429

1504

return xmlstring

1430

1505

1506

1431

1507

try:

1432

1508

dbus.OBJECT_MANAGER_IFACE

1433

1509

except AttributeError:

1434

1510

dbus.OBJECT_MANAGER_IFACE = "org.freedesktop.DBus.ObjectManager"

1435

1511

1512

1436

1513

class DBusObjectWithObjectManager(DBusObjectWithAnnotations):

1437

1514

"""A D-Bus object with an ObjectManager.

1438

1515

1439

1516

Classes inheriting from this exposes the standard

1440

1517

GetManagedObjects call and the InterfacesAdded and

1441

1518

InterfacesRemoved signals on the standard

1442

1519

"org.freedesktop.DBus.ObjectManager" interface.

1443

1520

1444

1521

Note: No signals are sent automatically; they must be sent

1445

1522

manually.

1446

1523

"""

1447

1524

@dbus.service.method(dbus.OBJECT_MANAGER_IFACE,

1448

out_signature = "a{oa{sa{sv}}}")

1525

out_signature="a{oa{sa{sv}}}")

1449

1526

def GetManagedObjects(self):

1450

1527

"""This function must be overridden"""

1451

1528

raise NotImplementedError()

1452

1529

1453

1530

@dbus.service.signal(dbus.OBJECT_MANAGER_IFACE,

1454

signature = "oa{sa{sv}}")

1531

signature="oa{sa{sv}}")

1455

1532

def InterfacesAdded(self, object_path, interfaces_and_properties):

1456

1533

pass

1457

1458

@dbus.service.signal(dbus.OBJECT_MANAGER_IFACE, signature = "oas")

1534

1535

@dbus.service.signal(dbus.OBJECT_MANAGER_IFACE, signature="oas")

1459

1536

def InterfacesRemoved(self, object_path, interfaces):

1460

1537

pass

1461

1538

1462

1539

@dbus.service.method(dbus.INTROSPECTABLE_IFACE,

1463

out_signature = "s",

1464

path_keyword = 'object_path',

1465

connection_keyword = 'connection')

1540

out_signature="s",

1541

path_keyword='object_path',

1542

connection_keyword='connection')

1466

1543

def Introspect(self, object_path, connection):

1467

1544

"""Overloading of standard D-Bus method.

1468

1545

1469

1546

Override return argument name of GetManagedObjects to be

1470

1547

"objpath_interfaces_and_properties"

1471

1548

"""

1474

1551

connection)

1475

1552

try:

1476

1553

document = xml.dom.minidom.parseString(xmlstring)

1477

1554

1478

1555

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

1479

1556

# Fix argument name for the GetManagedObjects method

1480

1557

if (if_tag.getAttribute("name")

1481

== dbus.OBJECT_MANAGER_IFACE):

1558

== dbus.OBJECT_MANAGER_IFACE):

1482

1559

for cn in if_tag.getElementsByTagName("method"):

1483

1560

if (cn.getAttribute("name")

1484

1561

== "GetManagedObjects"):

1494

1571

except (AttributeError, xml.dom.DOMException,

1495

1572

xml.parsers.expat.ExpatError) as error:

1496

1573

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

1497

exc_info = error)

1574

exc_info=error)

1498

1575

return xmlstring

1499

1576

1577

1500

1578

def datetime_to_dbus(dt, variant_level=0):

1501

1579

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

1502

1580

if dt is None:

1503

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

1581

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

1504

1582

return dbus.String(dt.isoformat(), variant_level=variant_level)

1505

1583

1506

1584

1509

1587

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

1510

1588

interface names according to the "alt_interface_names" mapping.

1511

1589

Usage:

1512

1590

1513

1591

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

1514

1592

"net.example.AlternateInterface"})

1515

1593

class SampleDBusObject(dbus.service.Object):

1516

1594

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

1517

1595

def SampleDBusMethod():

1518

1596

pass

1519

1597

1520

1598

The above "SampleDBusMethod" on "SampleDBusObject" will be

1521

1599

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

1522

1600

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

1523

1601

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

1524

1602

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

1525

1603

1526

1604

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

1527

1605

(from DBusObjectWithProperties) and interfaces (from the

1528

1606

dbus_interface_annotations decorator).

1529

1607

"""

1530

1608

1531

1609

def wrapper(cls):

1532

1610

for orig_interface_name, alt_interface_name in (

1533

1611

alt_interface_names.items()):

1573

1651

attribute._dbus_annotations)

1574

1652

except AttributeError:

1575

1653

pass

1654

1576

1655

# Define a creator of a function to call both the

1577

1656

# original and alternate functions, so both the

1578

1657

# original and alternate signals gets sent when

1581

1660

"""This function is a scope container to pass

1582

1661

func1 and func2 to the "call_both" function

1583

1662

outside of its arguments"""

1584

1663

1585

1664

@functools.wraps(func2)

1586

1665

def call_both(*args, **kwargs):

1587

1666

"""This function will emit two D-Bus

1588

1667

signals by calling func1 and func2"""

1589

1668

func1(*args, **kwargs)

1590

1669

func2(*args, **kwargs)

1591

# Make wrapper function look like a D-Bus signal

1670

# Make wrapper function look like a D-Bus

1671

# signal

1592

1672

for name, attr in inspect.getmembers(func2):

1593

1673

if name.startswith("_dbus_"):

1594

1674

setattr(call_both, name, attr)

1595

1675

1596

1676

return call_both

1597

1677

# Create the "call_both" function and add it to

1598

1678

# the class

1644

1724

(copy_function(attribute)))

1645

1725

if deprecate:

1646

1726

# Deprecate all alternate interfaces

1647

iname="_AlternateDBusNames_interface_annotation{}"

1727

iname = "_AlternateDBusNames_interface_annotation{}"

1648

1728

for interface_name in interface_names:

1649

1729

1650

1730

@dbus_interface_annotations(interface_name)

1651

1731

def func(self):

1652

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

1653

"true" }

1732

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

1733

"true"}

1654

1734

# Find an unused name

1655

1735

for aname in (iname.format(i)

1656

1736

for i in itertools.count()):

1667

1747

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

1668

1748

(cls, ), attr)

1669

1749

return cls

1670

1750

1671

1751

return wrapper

1672

1752

1673

1753

1675

1755

"se.bsnet.fukt.Mandos"})

1676

1756

class ClientDBus(Client, DBusObjectWithProperties):

1677

1757

"""A Client class using D-Bus

1678

1758

1679

1759

Attributes:

1680

1760

dbus_object_path: dbus.ObjectPath

1681

1761

bus: dbus.SystemBus()

1682

1762

"""

1683

1763

1684

1764

runtime_expansions = (Client.runtime_expansions

1685

1765

+ ("dbus_object_path", ))

1686

1766

1687

1767

_interface = "se.recompile.Mandos.Client"

1688

1768

1689

1769

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

1690

1691

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

1770

1771

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

1692

1772

self.bus = bus

1693

1773

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

1694

1774

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

1700

1780

"/clients/" + client_object_name)

1701

1781

DBusObjectWithProperties.__init__(self, self.bus,

1702

1782

self.dbus_object_path)

1703

1783

1704

1784

def notifychangeproperty(transform_func, dbus_name,

1705

1785

type_func=lambda x: x,

1706

1786

variant_level=1,

1708

1788

_interface=_interface):

1709

1789

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

1710

1790

its changes to DBus.

1711

1791

1712

1792

transform_fun: Function that takes a value and a variant_level

1713

1793

and transforms it to a D-Bus type.

1714

1794

dbus_name: D-Bus name of the variable

1717

1797

variant_level: D-Bus variant level. Default: 1

1718

1798

"""

1719

1799

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

1720

1800

1721

1801

def setter(self, value):

1722

1802

if hasattr(self, "dbus_object_path"):

1723

1803

if (not hasattr(self, attrname) or

1730

1810

else:

1731

1811

dbus_value = transform_func(

1732

1812

type_func(value),

1733

variant_level = variant_level)

1813

variant_level=variant_level)

1734

1814

self.PropertyChanged(dbus.String(dbus_name),

1735

1815

dbus_value)

1736

1816

self.PropertiesChanged(

1737

1817

_interface,

1738

dbus.Dictionary({ dbus.String(dbus_name):

1739

dbus_value }),

1818

dbus.Dictionary({dbus.String(dbus_name):

1819

dbus_value}),

1740

1820

dbus.Array())

1741

1821

setattr(self, attrname, value)

1742

1822

1743

1823

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

1744

1824

1745

1825

expires = notifychangeproperty(datetime_to_dbus, "Expires")

1746

1826

approvals_pending = notifychangeproperty(dbus.Boolean,

1747

1827

"ApprovalPending",

1748

type_func = bool)

1828

type_func=bool)

1749

1829

enabled = notifychangeproperty(dbus.Boolean, "Enabled")

1750

1830

last_enabled = notifychangeproperty(datetime_to_dbus,

1751

1831

"LastEnabled")

1752

1832

checker = notifychangeproperty(

1753

1833

dbus.Boolean, "CheckerRunning",

1754

type_func = lambda checker: checker is not None)

1834

type_func=lambda checker: checker is not None)

1755

1835

last_checked_ok = notifychangeproperty(datetime_to_dbus,

1756

1836

"LastCheckedOK")

1757

1837

last_checker_status = notifychangeproperty(dbus.Int16,

1762

1842

"ApprovedByDefault")

1763

1843

approval_delay = notifychangeproperty(

1764

1844

dbus.UInt64, "ApprovalDelay",

1765

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

1845

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

1766

1846

approval_duration = notifychangeproperty(

1767

1847

dbus.UInt64, "ApprovalDuration",

1768

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

1848

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

1769

1849

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

1770

1850

timeout = notifychangeproperty(

1771

1851

dbus.UInt64, "Timeout",

1772

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

1852

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

1773

1853

extended_timeout = notifychangeproperty(

1774

1854

dbus.UInt64, "ExtendedTimeout",

1775

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

1855

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

1776

1856

interval = notifychangeproperty(

1777

1857

dbus.UInt64, "Interval",

1778

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

1858

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

1779

1859

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

1780

1860

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

1781

1861

invalidate_only=True)

1782

1862

1783

1863

del notifychangeproperty

1784

1864

1785

1865

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

1786

1866

try:

1787

1867

self.remove_from_connection()

1790

1870

if hasattr(DBusObjectWithProperties, "__del__"):

1791

1871

DBusObjectWithProperties.__del__(self, *args, **kwargs)

1792

1872

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

1793

1873

1794

1874

def checker_callback(self, source, condition,

1795

1875

connection, command, *args, **kwargs):

1796

1876

ret = Client.checker_callback(self, source, condition,

1812

1892

| self.last_checker_signal),

1813

1893

dbus.String(command))

1814

1894

return ret

1815

1895

1816

1896

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

1817

1897

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

1818

1898

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

1822

1902

# Emit D-Bus signal

1823

1903

self.CheckerStarted(self.current_checker_command)

1824

1904

return r

1825

1905

1826

1906

def _reset_approved(self):

1827

1907

self.approved = None

1828

1908

return False

1829

1909

1830

1910

def approve(self, value=True):

1831

1911

self.approved = value

1832

1912

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

1833

1913

* 1000), self._reset_approved)

1834

1914

self.send_changedstate()

1835

1836

## D-Bus methods, signals & properties

1837

1838

## Interfaces

1839

1840

## Signals

1841

1915

1916

# D-Bus methods, signals & properties

1917

1918

# Interfaces

1919

1920

# Signals

1921

1842

1922

# CheckerCompleted - signal

1843

1923

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

1844

1924

def CheckerCompleted(self, exitcode, waitstatus, command):

1845

1925

"D-Bus signal"

1846

1926

pass

1847

1927

1848

1928

# CheckerStarted - signal

1849

1929

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

1850

1930

def CheckerStarted(self, command):

1851

1931

"D-Bus signal"

1852

1932

pass

1853

1933

1854

1934

# PropertyChanged - signal

1855

1935

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

1856

1936

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

1857

1937

def PropertyChanged(self, property, value):

1858

1938

"D-Bus signal"

1859

1939

pass

1860

1940

1861

1941

# GotSecret - signal

1862

1942

@dbus.service.signal(_interface)

1863

1943

def GotSecret(self):

1866

1946

server to mandos-client

1867

1947

"""

1868

1948

pass

1869

1949

1870

1950

# Rejected - signal

1871

1951

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

1872

1952

def Rejected(self, reason):

1873

1953

"D-Bus signal"

1874

1954

pass

1875

1955

1876

1956

# NeedApproval - signal

1877

1957

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

1878

1958

def NeedApproval(self, timeout, default):

1879

1959

"D-Bus signal"

1880

1960

return self.need_approval()

1881

1882

## Methods

1883

1961

1962

# Methods

1963

1884

1964

# Approve - method

1885

1965

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

1886

1966

def Approve(self, value):

1887

1967

self.approve(value)

1888

1968

1889

1969

# CheckedOK - method

1890

1970

@dbus.service.method(_interface)

1891

1971

def CheckedOK(self):

1892

1972

self.checked_ok()

1893

1973

1894

1974

# Enable - method

1895

1975

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

1896

1976

@dbus.service.method(_interface)

1897

1977

def Enable(self):

1898

1978

"D-Bus method"

1899

1979

self.enable()

1900

1980

1901

1981

# StartChecker - method

1902

1982

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

1903

1983

@dbus.service.method(_interface)

1904

1984

def StartChecker(self):

1905

1985

"D-Bus method"

1906

1986

self.start_checker()

1907

1987

1908

1988

# Disable - method

1909

1989

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

1910

1990

@dbus.service.method(_interface)

1911

1991

def Disable(self):

1912

1992

"D-Bus method"

1913

1993

self.disable()

1914

1994

1915

1995

# StopChecker - method

1916

1996

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

1917

1997

@dbus.service.method(_interface)

1918

1998

def StopChecker(self):

1919

1999

self.stop_checker()

1920

1921

## Properties

1922

2000

2001

# Properties

2002

1923

2003

# ApprovalPending - property

1924

2004

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

1925

2005

def ApprovalPending_dbus_property(self):

1926

2006

return dbus.Boolean(bool(self.approvals_pending))

1927

2007

1928

2008

# ApprovedByDefault - property

1929

2009

@dbus_service_property(_interface,

1930

2010

signature="b",

1933

2013

if value is None: # get

1934

2014

return dbus.Boolean(self.approved_by_default)

1935

2015

self.approved_by_default = bool(value)

1936

2016

1937

2017

# ApprovalDelay - property

1938

2018

@dbus_service_property(_interface,

1939

2019

signature="t",

1943

2023

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

1944

2024

* 1000)

1945

2025

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

1946

2026

1947

2027

# ApprovalDuration - property

1948

2028

@dbus_service_property(_interface,

1949

2029

signature="t",

1953

2033

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

1954

2034

* 1000)

1955

2035

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

1956

2036

1957

2037

# Name - property

1958

2038

@dbus_annotations(

1959

2039

{"org.freedesktop.DBus.Property.EmitsChangedSignal": "const"})

1960

2040

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

1961

2041

def Name_dbus_property(self):

1962

2042

return dbus.String(self.name)

1963

2043

2044

# KeyID - property

2045

@dbus_annotations(

2046

{"org.freedesktop.DBus.Property.EmitsChangedSignal": "const"})

2047

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

2048

def KeyID_dbus_property(self):

2049

return dbus.String(self.key_id)

2050

1964

2051

# Fingerprint - property

1965

2052

@dbus_annotations(

1966

2053

{"org.freedesktop.DBus.Property.EmitsChangedSignal": "const"})

1967

2054

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

1968

2055

def Fingerprint_dbus_property(self):

1969

2056

return dbus.String(self.fingerprint)

1970

2057

1971

2058

# Host - property

1972

2059

@dbus_service_property(_interface,

1973

2060

signature="s",

1976

2063

if value is None: # get

1977

2064

return dbus.String(self.host)

1978

2065

self.host = str(value)

1979

2066

1980

2067

# Created - property

1981

2068

@dbus_annotations(

1982

2069

{"org.freedesktop.DBus.Property.EmitsChangedSignal": "const"})

1983

2070

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

1984

2071

def Created_dbus_property(self):

1985

2072

return datetime_to_dbus(self.created)

1986

2073

1987

2074

# LastEnabled - property

1988

2075

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

1989

2076

def LastEnabled_dbus_property(self):

1990

2077

return datetime_to_dbus(self.last_enabled)

1991

2078

1992

2079

# Enabled - property

1993

2080

@dbus_service_property(_interface,

1994

2081

signature="b",

2000

2087

self.enable()

2001

2088

else:

2002

2089

self.disable()

2003

2090

2004

2091

# LastCheckedOK - property

2005

2092

@dbus_service_property(_interface,

2006

2093

signature="s",

2010

2097

self.checked_ok()

2011

2098

return

2012

2099

return datetime_to_dbus(self.last_checked_ok)

2013

2100

2014

2101

# LastCheckerStatus - property

2015

2102

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

2016

2103

def LastCheckerStatus_dbus_property(self):

2017

2104

return dbus.Int16(self.last_checker_status)

2018

2105

2019

2106

# Expires - property

2020

2107

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

2021

2108

def Expires_dbus_property(self):

2022

2109

return datetime_to_dbus(self.expires)

2023

2110

2024

2111

# LastApprovalRequest - property

2025

2112

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

2026

2113

def LastApprovalRequest_dbus_property(self):

2027

2114

return datetime_to_dbus(self.last_approval_request)

2028

2115

2029

2116

# Timeout - property

2030

2117

@dbus_service_property(_interface,

2031

2118

signature="t",

2050

2137

self.disable_initiator_tag = GLib.timeout_add(

2051

2138

int((self.expires - now).total_seconds() * 1000),

2052

2139

self.disable)

2053

2140

2054

2141

# ExtendedTimeout - property

2055

2142

@dbus_service_property(_interface,

2056

2143

signature="t",

2060

2147

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

2061

2148

* 1000)

2062

2149

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

2063

2150

2064

2151

# Interval - property

2065

2152

@dbus_service_property(_interface,

2066

2153

signature="t",

2076

2163

GLib.source_remove(self.checker_initiator_tag)

2077

2164

self.checker_initiator_tag = GLib.timeout_add(

2078

2165

value, self.start_checker)

2079

self.start_checker() # Start one now, too

2080

2166

self.start_checker() # Start one now, too

2167

2081

2168

# Checker - property

2082

2169

@dbus_service_property(_interface,

2083

2170

signature="s",

2086

2173

if value is None: # get

2087

2174

return dbus.String(self.checker_command)

2088

2175

self.checker_command = str(value)

2089

2176

2090

2177

# CheckerRunning - property

2091

2178

@dbus_service_property(_interface,

2092

2179

signature="b",

2098

2185

self.start_checker()

2099

2186

else:

2100

2187

self.stop_checker()

2101

2188

2102

2189

# ObjectPath - property

2103

2190

@dbus_annotations(

2104

2191

{"org.freedesktop.DBus.Property.EmitsChangedSignal": "const",

2105

2192

"org.freedesktop.DBus.Deprecated": "true"})

2106

2193

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

2107

2194

def ObjectPath_dbus_property(self):

2108

return self.dbus_object_path # is already a dbus.ObjectPath

2109

2195

return self.dbus_object_path # is already a dbus.ObjectPath

2196

2110

2197

# Secret = property

2111

2198

@dbus_annotations(

2112

2199

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

2117

2204

byte_arrays=True)

2118

2205

def Secret_dbus_property(self, value):

2119

2206

self.secret = bytes(value)

2120

2207

2121

2208

del _interface

2122

2209

2123

2210

2124

2211

class ProxyClient(object):

2125

def __init__(self, child_pipe, fpr, address):

2212

def __init__(self, child_pipe, key_id, fpr, address):

2126

2213

self._pipe = child_pipe

2127

self._pipe.send(('init', fpr, address))

2214

self._pipe.send(('init', key_id, fpr, address))

2128

2215

if not self._pipe.recv():

2129

raise KeyError(fpr)

2130

2216

raise KeyError(key_id or fpr)

2217

2131

2218

def __getattribute__(self, name):

2132

2219

if name == '_pipe':

2133

2220

return super(ProxyClient, self).__getattribute__(name)

2136

2223

if data[0] == 'data':

2137

2224

return data[1]

2138

2225

if data[0] == 'function':

2139

2226

2140

2227

def func(*args, **kwargs):

2141

2228

self._pipe.send(('funcall', name, args, kwargs))

2142

2229

return self._pipe.recv()[1]

2143

2230

2144

2231

return func

2145

2232

2146

2233

def __setattr__(self, name, value):

2147

2234

if name == '_pipe':

2148

2235

return super(ProxyClient, self).__setattr__(name, value)

2151

2238

2152

2239

class ClientHandler(socketserver.BaseRequestHandler, object):

2153

2240

"""A class to handle client connections.

2154

2241

2155

2242

Instantiated once for each connection to handle it.

2156

2243

Note: This will run in its own forked process."""

2157

2244

2158

2245

def handle(self):

2159

2246

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

2160

2247

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

2161

2248

str(self.client_address))

2162

2249

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

2163

2250

self.server.child_pipe.fileno())

2164

2251

2165

2252

session = gnutls.ClientSession(self.request)

2166

2167

#priority = ':'.join(("NONE", "+VERS-TLS1.1",

2168

# "+AES-256-CBC", "+SHA1",

2169

# "+COMP-NULL", "+CTYPE-OPENPGP",

2170

# "+DHE-DSS"))

2253

2254

# priority = ':'.join(("NONE", "+VERS-TLS1.1",

2255

# "+AES-256-CBC", "+SHA1",

2256

# "+COMP-NULL", "+CTYPE-OPENPGP",

2257

# "+DHE-DSS"))

2171

2258

# Use a fallback default, since this MUST be set.

2172

2259

priority = self.server.gnutls_priority

2173

2260

if priority is None:

2174

2261

priority = "NORMAL"

2175

gnutls.priority_set_direct(session._c_object, priority,

2262

gnutls.priority_set_direct(session._c_object,

2263

priority.encode("utf-8"),

2176

2264

None)

2177

2265

2178

2266

# Start communication using the Mandos protocol

2179

2267

# Get protocol number

2180

2268

line = self.request.makefile().readline()

2185

2273

except (ValueError, IndexError, RuntimeError) as error:

2186

2274

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

2187

2275

return

2188

2276

2189

2277

# Start GnuTLS connection

2190

2278

try:

2191

2279

session.handshake()

2195

2283

# established. Just abandon the request.

2196

2284

return

2197

2285

logger.debug("Handshake succeeded")

2198

2286

2199

2287

approval_required = False

2200

2288

try:

2201

try:

2202

fpr = self.fingerprint(

2203

self.peer_certificate(session))

2204

except (TypeError, gnutls.Error) as error:

2205

logger.warning("Bad certificate: %s", error)

2206

return

2207

logger.debug("Fingerprint: %s", fpr)

2208

2209

try:

2210

client = ProxyClient(child_pipe, fpr,

2289

if gnutls.has_rawpk:

2290

fpr = ""

2291

try:

2292

key_id = self.key_id(

2293

self.peer_certificate(session))

2294

except (TypeError, gnutls.Error) as error:

2295

logger.warning("Bad certificate: %s", error)

2296

return

2297

logger.debug("Key ID: %s", key_id)

2298

2299

else:

2300

key_id = ""

2301

try:

2302

fpr = self.fingerprint(

2303

self.peer_certificate(session))

2304

except (TypeError, gnutls.Error) as error:

2305

logger.warning("Bad certificate: %s", error)

2306

return

2307

logger.debug("Fingerprint: %s", fpr)

2308

2309

try:

2310

client = ProxyClient(child_pipe, key_id, fpr,

2211

2311

self.client_address)

2212

2312

except KeyError:

2213

2313

return

2214

2314

2215

2315

if client.approval_delay:

2216

2316

delay = client.approval_delay

2217

2317

client.approvals_pending += 1

2218

2318

approval_required = True

2219

2319

2220

2320

while True:

2221

2321

if not client.enabled:

2222

2322

logger.info("Client %s is disabled",

2225

2325

# Emit D-Bus signal

2226

2326

client.Rejected("Disabled")

2227

2327

return

2228

2328

2229

2329

if client.approved or not client.approval_delay:

2230

#We are approved or approval is disabled

2330

# We are approved or approval is disabled

2231

2331

break

2232

2332

elif client.approved is None:

2233

2333

logger.info("Client %s needs approval",

2244

2344

# Emit D-Bus signal

2245

2345

client.Rejected("Denied")

2246

2346

return

2247

2248

#wait until timeout or approved

2347

2348

# wait until timeout or approved

2249

2349

time = datetime.datetime.now()

2250

2350

client.changedstate.acquire()

2251

2351

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

2264

2364

break

2265

2365

else:

2266

2366

delay -= time2 - time

2267

2367

2268

2368

try:

2269

2369

session.send(client.secret)

2270

2370

except gnutls.Error as error:

2271

2371

logger.warning("gnutls send failed",

2272

exc_info = error)

2372

exc_info=error)

2273

2373

return

2274

2374

2275

2375

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

2276

2376

# bump the timeout using extended_timeout

2277

2377

client.bump_timeout(client.extended_timeout)

2278

2378

if self.server.use_dbus:

2279

2379

# Emit D-Bus signal

2280

2380

client.GotSecret()

2281

2381

2282

2382

finally:

2283

2383

if approval_required:

2284

2384

client.approvals_pending -= 1

2287

2387

except gnutls.Error as error:

2288

2388

logger.warning("GnuTLS bye failed",

2289

2389

exc_info=error)

2290

2390

2291

2391

@staticmethod

2292

2392

def peer_certificate(session):

2293

"Return the peer's OpenPGP certificate as a bytestring"

2294

# If not an OpenPGP certificate...

2295

if (gnutls.certificate_type_get(session._c_object)

2296

!= gnutls.CRT_OPENPGP):

2393

"Return the peer's certificate as a bytestring"

2394

try:

2395

cert_type = gnutls.certificate_type_get2(session._c_object,

2396

gnutls.CTYPE_PEERS)

2397

except AttributeError:

2398

cert_type = gnutls.certificate_type_get(session._c_object)

2399

if gnutls.has_rawpk:

2400

valid_cert_types = frozenset((gnutls.CRT_RAWPK,))

2401

else:

2402

valid_cert_types = frozenset((gnutls.CRT_OPENPGP,))

2403

# If not a valid certificate type...

2404

if cert_type not in valid_cert_types:

2405

logger.info("Cert type %r not in %r", cert_type,

2406

valid_cert_types)

2297

2407

# ...return invalid data

2298

2408

return b""

2299

2409

list_size = ctypes.c_uint(1)

2305

2415

return None

2306

2416

cert = cert_list[0]

2307

2417

return ctypes.string_at(cert.data, cert.size)

2308

2418

2419

@staticmethod

2420

def key_id(certificate):

2421

"Convert a certificate bytestring to a hexdigit key ID"

2422

# New GnuTLS "datum" with the public key

2423

datum = gnutls.datum_t(

2424

ctypes.cast(ctypes.c_char_p(certificate),

2425

ctypes.POINTER(ctypes.c_ubyte)),

2426

ctypes.c_uint(len(certificate)))

2427

# XXX all these need to be created in the gnutls "module"

2428

# New empty GnuTLS certificate

2429

pubkey = gnutls.pubkey_t()

2430

gnutls.pubkey_init(ctypes.byref(pubkey))

2431

# Import the raw public key into the certificate

2432

gnutls.pubkey_import(pubkey,

2433

ctypes.byref(datum),

2434

gnutls.X509_FMT_DER)

2435

# New buffer for the key ID

2436

buf = ctypes.create_string_buffer(32)

2437

buf_len = ctypes.c_size_t(len(buf))

2438

# Get the key ID from the raw public key into the buffer

2439

gnutls.pubkey_get_key_id(pubkey,

2440

gnutls.KEYID_USE_SHA256,

2441

ctypes.cast(ctypes.byref(buf),

2442

ctypes.POINTER(ctypes.c_ubyte)),

2443

ctypes.byref(buf_len))

2444

# Deinit the certificate

2445

gnutls.pubkey_deinit(pubkey)

2446

2447

# Convert the buffer to a Python bytestring

2448

key_id = ctypes.string_at(buf, buf_len.value)

2449

# Convert the bytestring to hexadecimal notation

2450

hex_key_id = binascii.hexlify(key_id).upper()

2451

return hex_key_id

2452

2309

2453

@staticmethod

2310

2454

def fingerprint(openpgp):

2311

2455

"Convert an OpenPGP bytestring to a hexdigit fingerprint"

2326

2470

ctypes.byref(crtverify))

2327

2471

if crtverify.value != 0:

2328

2472

gnutls.openpgp_crt_deinit(crt)

2329

raise gnutls.CertificateSecurityError("Verify failed")

2473

raise gnutls.CertificateSecurityError(code

2474

=crtverify.value)

2330

2475

# New buffer for the fingerprint

2331

2476

buf = ctypes.create_string_buffer(20)

2332

2477

buf_len = ctypes.c_size_t()

2344

2489

2345

2490

class MultiprocessingMixIn(object):

2346

2491

"""Like socketserver.ThreadingMixIn, but with multiprocessing"""

2347

2492

2348

2493

def sub_process_main(self, request, address):

2349

2494

try:

2350

2495

self.finish_request(request, address)

2351

2496

except Exception:

2352

2497

self.handle_error(request, address)

2353

2498

self.close_request(request)

2354

2499

2355

2500

def process_request(self, request, address):

2356

2501

"""Start a new process to process the request."""

2357

proc = multiprocessing.Process(target = self.sub_process_main,

2358

args = (request, address))

2502

proc = multiprocessing.Process(target=self.sub_process_main,

2503

args=(request, address))

2359

2504

proc.start()

2360

2505

return proc

2361

2506

2362

2507

2363

2508

class MultiprocessingMixInWithPipe(MultiprocessingMixIn, object):

2364

2509

""" adds a pipe to the MixIn """

2365

2510

2366

2511

def process_request(self, request, client_address):

2367

2512

"""Overrides and wraps the original process_request().

2368

2513

2369

2514

This function creates a new pipe in self.pipe

2370

2515

"""

2371

2516

parent_pipe, self.child_pipe = multiprocessing.Pipe()

2372

2517

2373

2518

proc = MultiprocessingMixIn.process_request(self, request,

2374

2519

client_address)

2375

2520

self.child_pipe.close()

2376

2521

self.add_pipe(parent_pipe, proc)

2377

2522

2378

2523

def add_pipe(self, parent_pipe, proc):

2379

2524

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

2380

2525

raise NotImplementedError()

2383

2528

class IPv6_TCPServer(MultiprocessingMixInWithPipe,

2384

2529

socketserver.TCPServer, object):

2385

2530

"""IPv6-capable TCP server. Accepts 'None' as address and/or port

2386

2531

2387

2532

Attributes:

2388

2533

enabled: Boolean; whether this server is activated yet

2389

2534

interface: None or a network interface name (string)

2390

2535

use_ipv6: Boolean; to use IPv6 or not

2391

2536

"""

2392

2537

2393

2538

def __init__(self, server_address, RequestHandlerClass,

2394

2539

interface=None,

2395

2540

use_ipv6=True,

2405

2550

self.socketfd = socketfd

2406

2551

# Save the original socket.socket() function

2407

2552

self.socket_socket = socket.socket

2553

2408

2554

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

2409

#

2555

#

2410

2556

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

2411

2557

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

2412

2558

# patching socket.socket.)

2413

#

2559

#

2414

2560

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

2415

2561

@functools.wraps(socket.socket)

2416

2562

def socket_wrapper(*args, **kwargs):

2428

2574

# socket_wrapper(), if socketfd was set.

2429

2575

socketserver.TCPServer.__init__(self, server_address,

2430

2576

RequestHandlerClass)

2431

2577

2432

2578

def server_bind(self):

2433

2579

"""This overrides the normal server_bind() function

2434

2580

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

2435

2581

bind to an address or port if they were not specified."""

2582

global SO_BINDTODEVICE

2436

2583

if self.interface is not None:

2437

2584

if SO_BINDTODEVICE is None:

2438

logger.error("SO_BINDTODEVICE does not exist;"

2439

" cannot bind to interface %s",

2440

self.interface)

2441

else:

2442

try:

2443

self.socket.setsockopt(

2444

socket.SOL_SOCKET, SO_BINDTODEVICE,

2445

(self.interface + "\0").encode("utf-8"))

2446

except socket.error as error:

2447

if error.errno == errno.EPERM:

2448

logger.error("No permission to bind to"

2449

" interface %s", self.interface)

2450

elif error.errno == errno.ENOPROTOOPT:

2451

logger.error("SO_BINDTODEVICE not available;"

2452

" cannot bind to interface %s",

2453

self.interface)

2454

elif error.errno == errno.ENODEV:

2455

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

2456

" cannot bind", self.interface)

2457

else:

2458

raise

2585

# Fall back to a hard-coded value which seems to be

2586

# common enough.

2587

logger.warning("SO_BINDTODEVICE not found, trying 25")

2588

SO_BINDTODEVICE = 25

2589

try:

2590

self.socket.setsockopt(

2591

socket.SOL_SOCKET, SO_BINDTODEVICE,

2592

(self.interface + "\0").encode("utf-8"))

2593

except socket.error as error:

2594

if error.errno == errno.EPERM:

2595

logger.error("No permission to bind to"

2596

" interface %s", self.interface)

2597

elif error.errno == errno.ENOPROTOOPT:

2598

logger.error("SO_BINDTODEVICE not available;"

2599

" cannot bind to interface %s",

2600

self.interface)

2601

elif error.errno == errno.ENODEV:

2602

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

2603

" cannot bind", self.interface)

2604

else:

2605

raise

2459

2606

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

2460

2607

if self.server_address[0] or self.server_address[1]:

2608

if self.server_address[1]:

2609

self.allow_reuse_address = True

2461

2610

if not self.server_address[0]:

2462

2611

if self.address_family == socket.AF_INET6:

2463

any_address = "::" # in6addr_any

2612

any_address = "::" # in6addr_any

2464

2613

else:

2465

any_address = "0.0.0.0" # INADDR_ANY

2614

any_address = "0.0.0.0" # INADDR_ANY

2466

2615

self.server_address = (any_address,

2467

2616

self.server_address[1])

2468

2617

elif not self.server_address[1]:

2478

2627

2479

2628

class MandosServer(IPv6_TCPServer):

2480

2629

"""Mandos server.

2481

2630

2482

2631

Attributes:

2483

2632

clients: set of Client objects

2484

2633

gnutls_priority GnuTLS priority string

2485

2634

use_dbus: Boolean; to emit D-Bus signals or not

2486

2635

2487

2636

Assumes a GLib.MainLoop event loop.

2488

2637

"""

2489

2638

2490

2639

def __init__(self, server_address, RequestHandlerClass,

2491

2640

interface=None,

2492

2641

use_ipv6=True,

2502

2651

self.gnutls_priority = gnutls_priority

2503

2652

IPv6_TCPServer.__init__(self, server_address,

2504

2653

RequestHandlerClass,

2505

interface = interface,

2506

use_ipv6 = use_ipv6,

2507

socketfd = socketfd)

2508

2654

interface=interface,

2655

use_ipv6=use_ipv6,

2656

socketfd=socketfd)

2657

2509

2658

def server_activate(self):

2510

2659

if self.enabled:

2511

2660

return socketserver.TCPServer.server_activate(self)

2512

2661

2513

2662

def enable(self):

2514

2663

self.enabled = True

2515

2664

2516

2665

def add_pipe(self, parent_pipe, proc):

2517

2666

# Call "handle_ipc" for both data and EOF events

2518

2667

GLib.io_add_watch(

2519

2668

parent_pipe.fileno(),

2520

2669

GLib.IO_IN | GLib.IO_HUP,

2521

2670

functools.partial(self.handle_ipc,

2522

parent_pipe = parent_pipe,

2523

proc = proc))

2524

2671

parent_pipe=parent_pipe,

2672

proc=proc))

2673

2525

2674

def handle_ipc(self, source, condition,

2526

2675

parent_pipe=None,

2527

proc = None,

2676

proc=None,

2528

2677

client_object=None):

2529

2678

# error, or the other end of multiprocessing.Pipe has closed

2530

2679

if condition & (GLib.IO_ERR | GLib.IO_HUP):

2531

2680

# Wait for other process to exit

2532

2681

proc.join()

2533

2682

return False

2534

2683

2535

2684

# Read a request from the child

2536

2685

request = parent_pipe.recv()

2537

2686

command = request[0]

2538

2687

2539

2688

if command == 'init':

2540

fpr = request[1]

2541

address = request[2]

2542

2689

key_id = request[1].decode("ascii")

2690

fpr = request[2].decode("ascii")

2691

address = request[3]

2692

2543

2693

for c in self.clients.values():

2544

if c.fingerprint == fpr:

2694

if key_id == "E3B0C44298FC1C149AFBF4C8996FB92427AE41E4649B934CA495991B7852B855":

2695

continue

2696

if key_id and c.key_id == key_id:

2697

client = c

2698

break

2699

if fpr and c.fingerprint == fpr:

2545

2700

client = c

2546

2701

break

2547

2702

else:

2548

logger.info("Client not found for fingerprint: %s, ad"

2549

"dress: %s", fpr, address)

2703

logger.info("Client not found for key ID: %s, address"

2704

": %s", key_id or fpr, address)

2550

2705

if self.use_dbus:

2551

2706

# Emit D-Bus signal

2552

mandos_dbus_service.ClientNotFound(fpr,

2707

mandos_dbus_service.ClientNotFound(key_id or fpr,

2553

2708

address[0])

2554

2709

parent_pipe.send(False)

2555

2710

return False

2556

2711

2557

2712

GLib.io_add_watch(

2558

2713

parent_pipe.fileno(),

2559

2714

GLib.IO_IN | GLib.IO_HUP,

2560

2715

functools.partial(self.handle_ipc,

2561

parent_pipe = parent_pipe,

2562

proc = proc,

2563

client_object = client))

2716

parent_pipe=parent_pipe,

2717

proc=proc,

2718

client_object=client))

2564

2719

parent_pipe.send(True)

2565

2720

# remove the old hook in favor of the new above hook on

2566

2721

# same fileno

2569

2724

funcname = request[1]

2570

2725

args = request[2]

2571

2726

kwargs = request[3]

2572

2727

2573

2728

parent_pipe.send(('data', getattr(client_object,

2574

2729

funcname)(*args,

2575

2730

**kwargs)))

2576

2731

2577

2732

if command == 'getattr':

2578

2733

attrname = request[1]

2579

2734

if isinstance(client_object.__getattribute__(attrname),

2582

2737

else:

2583

2738

parent_pipe.send((

2584

2739

'data', client_object.__getattribute__(attrname)))

2585

2740

2586

2741

if command == 'setattr':

2587

2742

attrname = request[1]

2588

2743

value = request[2]

2589

2744

setattr(client_object, attrname, value)

2590

2745

2591

2746

return True

2592

2747

2593

2748

2594

2749

def rfc3339_duration_to_delta(duration):

2595

2750

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

2596

2751

2597

2752

>>> rfc3339_duration_to_delta("P7D")

2598

2753

datetime.timedelta(7)

2599

2754

>>> rfc3339_duration_to_delta("PT60S")

2609

2764

>>> rfc3339_duration_to_delta("P1DT3M20S")

2610

2765

datetime.timedelta(1, 200)

2611

2766

"""

2612

2767

2613

2768

# Parsing an RFC 3339 duration with regular expressions is not

2614

2769

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

2615

2770

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

2616

2771

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

2617

2772

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

2618

2773

# avoid excessive use of external libraries.

2619

2774

2620

2775

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

2621

2776

Token = collections.namedtuple("Token", (

2622

2777

"regexp", # To match token; if "value" is not None, must have

2655

2810

frozenset((token_year, token_month,

2656

2811

token_day, token_time,

2657

2812

token_week)))

2658

# Define starting values

2659

value = datetime.timedelta() # Value so far

2813

# Define starting values:

2814

# Value so far

2815

value = datetime.timedelta()

2660

2816

found_token = None

2661

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

2662

s = duration # String left to parse

2817

# Following valid tokens

2818

followers = frozenset((token_duration, ))

2819

# String left to parse

2820

s = duration

2663

2821

# Loop until end token is found

2664

2822

while found_token is not token_end:

2665

2823

# Search for any currently valid tokens

2689

2847

2690

2848

def string_to_delta(interval):

2691

2849

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

2692

2850

2693

2851

>>> string_to_delta('7d')

2694

2852

datetime.timedelta(7)

2695

2853

>>> string_to_delta('60s')

2703

2861

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

2704

2862

datetime.timedelta(0, 330)

2705

2863

"""

2706

2864

2707

2865

try:

2708

2866

return rfc3339_duration_to_delta(interval)

2709

2867

except ValueError:

2710

2868

pass

2711

2869

2712

2870

timevalue = datetime.timedelta(0)

2713

2871

for s in interval.split():

2714

2872

try:

2732

2890

return timevalue

2733

2891

2734

2892

2735

def daemon(nochdir = False, noclose = False):

2893

def daemon(nochdir=False, noclose=False):

2736

2894

"""See daemon(3). Standard BSD Unix function.

2737

2895

2738

2896

This should really exist as os.daemon, but it doesn't (yet)."""

2739

2897

if os.fork():

2740

2898

sys.exit()

2758

2916

2759

2917

2760

2918

def main():

2761

2919

2762

2920

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

2763

2921

# Parsing of options, both command line and config file

2764

2922

2765

2923

parser = argparse.ArgumentParser()

2766

2924

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

2767

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

2925

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

2768

2926

help="show version number and exit")

2769

2927

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

2770

2928

help="Bind to interface IF")

2806

2964

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

2807

2965

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

2808

2966

default=None)

2809

2967

2810

2968

options = parser.parse_args()

2811

2969

2812

2970

if options.check:

2813

2971

import doctest

2814

2972

fail_count, test_count = doctest.testmod()

2815

2973

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

2816

2974

2817

2975

# Default values for config file for server-global settings

2818

server_defaults = { "interface": "",

2819

"address": "",

2820

"port": "",

2821

"debug": "False",

2822

"priority":

2823

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

2824

":+SIGN-DSA-SHA256",

2825

"servicename": "Mandos",

2826

"use_dbus": "True",

2827

"use_ipv6": "True",

2828

"debuglevel": "",

2829

"restore": "True",

2830

"socket": "",

2831

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

2832

"foreground": "False",

2833

"zeroconf": "True",

2834

}

2835

2976

if gnutls.has_rawpk:

2977

priority = ("SECURE128:!CTYPE-X.509:+CTYPE-RAWPK:!RSA"

2978

":!VERS-ALL:+VERS-TLS1.3:%PROFILE_ULTRA")

2979

else:

2980

priority = ("SECURE256:!CTYPE-X.509:+CTYPE-OPENPGP:!RSA"

2981

":+SIGN-DSA-SHA256")

2982

server_defaults = {"interface": "",

2983

"address": "",

2984

"port": "",

2985

"debug": "False",

2986

"priority": priority,

2987

"servicename": "Mandos",

2988

"use_dbus": "True",

2989

"use_ipv6": "True",

2990

"debuglevel": "",

2991

"restore": "True",

2992

"socket": "",

2993

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

2994

"foreground": "False",

2995

"zeroconf": "True",

2996

}

2997

del priority

2998

2836

2999

# Parse config file for server-global settings

2837

3000

server_config = configparser.SafeConfigParser(server_defaults)

2838

3001

del server_defaults

2840

3003

# Convert the SafeConfigParser object to a dict

2841

3004

server_settings = server_config.defaults()

2842

3005

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

2843

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

3006

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

3007

"foreground", "zeroconf"):

2844

3008

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

2845

3009

option)

2846

3010

if server_settings["port"]:

2856

3020

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

2857

3021

["socket"])

2858

3022

del server_config

2859

3023

2860

3024

# Override the settings from the config file with command line

2861

3025

# options, if set.

2862

3026

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

2880

3044

if server_settings["debug"]:

2881

3045

server_settings["foreground"] = True

2882

3046

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

2883

3047

2884

3048

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

2885

3049

2886

3050

if (not server_settings["zeroconf"]

2887

3051

and not (server_settings["port"]

2888

3052

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

2889

3053

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

2890

3054

2891

3055

# For convenience

2892

3056

debug = server_settings["debug"]

2893

3057

debuglevel = server_settings["debuglevel"]

2897

3061

stored_state_file)

2898

3062

foreground = server_settings["foreground"]

2899

3063

zeroconf = server_settings["zeroconf"]

2900

3064

2901

3065

if debug:

2902

3066

initlogger(debug, logging.DEBUG)

2903

3067

else:

2906

3070

else:

2907

3071

level = getattr(logging, debuglevel.upper())

2908

3072

initlogger(debug, level)

2909

3073

2910

3074

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

2911

3075

syslogger.setFormatter(

2912

3076

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

2913

3077

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

2914

3078

server_settings["servicename"])))

2915

3079

2916

3080

# Parse config file with clients

2917

3081

client_config = configparser.SafeConfigParser(Client

2918

3082

.client_defaults)

2919

3083

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

2920

3084

"clients.conf"))

2921

3085

2922

3086

global mandos_dbus_service

2923

3087

mandos_dbus_service = None

2924

3088

2925

3089

socketfd = None

2926

3090

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

2927

3091

socketfd = server_settings["socket"]

2943

3107

except IOError as e:

2944

3108

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

2945

3109

exc_info=e)

2946

3110

2947

3111

for name, group in (("_mandos", "_mandos"),

2948

3112

("mandos", "mandos"),

2949

3113

("nobody", "nogroup")):

2967

3131

.format(uid, gid, os.strerror(error.errno)))

2968

3132

if error.errno != errno.EPERM:

2969

3133

raise

2970

3134

2971

3135

if debug:

2972

3136

# Enable all possible GnuTLS debugging

2973

3137

2974

3138

# "Use a log level over 10 to enable all debugging options."

2975

3139

# - GnuTLS manual

2976

3140

gnutls.global_set_log_level(11)

2977

3141

2978

3142

@gnutls.log_func

2979

3143

def debug_gnutls(level, string):

2980

3144

logger.debug("GnuTLS: %s", string[:-1])

2981

3145

2982

3146

gnutls.global_set_log_function(debug_gnutls)

2983

3147

2984

3148

# Redirect stdin so all checkers get /dev/null

2985

3149

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

2986

3150

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

2987

3151

if null > 2:

2988

3152

os.close(null)

2989

3153

2990

3154

# Need to fork before connecting to D-Bus

2991

3155

if not foreground:

2992

3156

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

2993

3157

daemon()

2994

3158

2995

3159

# multiprocessing will use threads, so before we use GLib we need

2996

3160

# to inform GLib that threads will be used.

2997

3161

GLib.threads_init()

2998

3162

2999

3163

global main_loop

3000

3164

# From the Avahi example code

3001

3165

DBusGMainLoop(set_as_default=True)

3018

3182

if zeroconf:

3019

3183

protocol = avahi.PROTO_INET6 if use_ipv6 else avahi.PROTO_INET

3020

3184

service = AvahiServiceToSyslog(

3021

name = server_settings["servicename"],

3022

servicetype = "_mandos._tcp",

3023

protocol = protocol,

3024

bus = bus)

3185

name=server_settings["servicename"],

3186

servicetype="_mandos._tcp",

3187

protocol=protocol,

3188

bus=bus)

3025

3189

if server_settings["interface"]:

3026

3190

service.interface = if_nametoindex(

3027

3191

server_settings["interface"].encode("utf-8"))

3028

3192

3029

3193

global multiprocessing_manager

3030

3194

multiprocessing_manager = multiprocessing.Manager()

3031

3195

3032

3196

client_class = Client

3033

3197

if use_dbus:

3034

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

3035

3198

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

3199

3036

3200

client_settings = Client.config_parser(client_config)

3037

3201

old_client_settings = {}

3038

3202

clients_data = {}

3039

3203

3040

3204

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

3041

3205

global wnull

3042

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

3206

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

3043

3207

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

3044

3208

# mode

3045

3209

if debug or not foreground:

3046

3210

wnull.close()

3047

3211

3048

3212

# Get client data and settings from last running state.

3049

3213

if server_settings["restore"]:

3050

3214

try:

3051

3215

with open(stored_state_path, "rb") as stored_state:

3052

if sys.version_info.major == 2:

3216

if sys.version_info.major == 2:

3053

3217

clients_data, old_client_settings = pickle.load(

3054

3218

stored_state)

3055

3219

else:

3056

3220

bytes_clients_data, bytes_old_client_settings = (

3057

pickle.load(stored_state, encoding = "bytes"))

3058

### Fix bytes to strings

3059

## clients_data

3221

pickle.load(stored_state, encoding="bytes"))

3222

# Fix bytes to strings

3223

# clients_data

3060

3224

# .keys()

3061

clients_data = { (key.decode("utf-8")

3062

if isinstance(key, bytes)

3063

else key): value

3064

for key, value in

3065

bytes_clients_data.items() }

3225

clients_data = {(key.decode("utf-8")

3226

if isinstance(key, bytes)

3227

else key): value

3228

for key, value in

3229

bytes_clients_data.items()}

3066

3230

del bytes_clients_data

3067

3231

for key in clients_data:

3068

value = { (k.decode("utf-8")

3069

if isinstance(k, bytes) else k): v

3070

for k, v in

3071

clients_data[key].items() }

3232

value = {(k.decode("utf-8")

3233

if isinstance(k, bytes) else k): v

3234

for k, v in

3235

clients_data[key].items()}

3072

3236

clients_data[key] = value

3073

3237

# .client_structure

3074

3238

value["client_structure"] = [

3075

3239

(s.decode("utf-8")

3076

3240

if isinstance(s, bytes)

3077

3241

else s) for s in

3078

value["client_structure"] ]

3242

value["client_structure"]]

3079

3243

# .name & .host

3080

3244

for k in ("name", "host"):

3081

3245

if isinstance(value[k], bytes):

3082

3246

value[k] = value[k].decode("utf-8")

3083

## old_client_settings

3247

if not value.has_key("key_id"):

3248

value["key_id"] = ""

3249

elif not value.has_key("fingerprint"):

3250

value["fingerprint"] = ""

3251

# old_client_settings

3084

3252

# .keys()

3085

3253

old_client_settings = {

3086

3254

(key.decode("utf-8")

3087

3255

if isinstance(key, bytes)

3088

3256

else key): value

3089

3257

for key, value in

3090

bytes_old_client_settings.items() }

3258

bytes_old_client_settings.items()}

3091

3259

del bytes_old_client_settings

3092

3260

# .host

3093

3261

for value in old_client_settings.values():

3107

3275

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

3108

3276

"EOFError:",

3109

3277

exc_info=e)

3110

3278

3111

3279

with PGPEngine() as pgp:

3112

3280

for client_name, client in clients_data.items():

3113

3281

# Skip removed clients

3114

3282

if client_name not in client_settings:

3115

3283

continue

3116

3284

3117

3285

# Decide which value to use after restoring saved state.

3118

3286

# We have three different values: Old config file,

3119

3287

# new config file, and saved state.

3130

3298

client[name] = value

3131

3299

except KeyError:

3132

3300

pass

3133

3301

3134

3302

# Clients who has passed its expire date can still be

3135

3303

# enabled if its last checker was successful. A Client

3136

3304

# whose checker succeeded before we stored its state is

3169

3337

client_name))

3170

3338

client["secret"] = (client_settings[client_name]

3171

3339

["secret"])

3172

3340

3173

3341

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

3174

3342

for client_name in (set(old_client_settings)

3175

3343

- set(client_settings)):

3177

3345

for client_name in (set(client_settings)

3178

3346

- set(old_client_settings)):

3179

3347

clients_data[client_name] = client_settings[client_name]

3180

3348

3181

3349

# Create all client objects

3182

3350

for client_name, client in clients_data.items():

3183

3351

tcp_server.clients[client_name] = client_class(

3184

name = client_name,

3185

settings = client,

3186

server_settings = server_settings)

3187

3352

name=client_name,

3353

settings=client,

3354

server_settings=server_settings)

3355

3188

3356

if not tcp_server.clients:

3189

3357

logger.warning("No clients defined")

3190

3358

3191

3359

if not foreground:

3192

3360

if pidfile is not None:

3193

3361

pid = os.getpid()

3199

3367

pidfilename, pid)

3200

3368

del pidfile

3201

3369

del pidfilename

3202

3370

3203

3371

for termsig in (signal.SIGHUP, signal.SIGTERM):

3204

3372

GLib.unix_signal_add(GLib.PRIORITY_HIGH, termsig,

3205

3373

lambda: main_loop.quit() and False)

3206

3374

3207

3375

if use_dbus:

3208

3376

3209

3377

@alternate_dbus_interfaces(

3210

{ "se.recompile.Mandos": "se.bsnet.fukt.Mandos" })

3378

{"se.recompile.Mandos": "se.bsnet.fukt.Mandos"})

3211

3379

class MandosDBusService(DBusObjectWithObjectManager):

3212

3380

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

3213

3381

3214

3382

def __init__(self):

3215

3383

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

3216

3384

3217

3385

_interface = "se.recompile.Mandos"

3218

3386

3219

3387

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

3220

3388

def ClientAdded(self, objpath):

3221

3389

"D-Bus signal"

3222

3390

pass

3223

3391

3224

3392

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

3225

def ClientNotFound(self, fingerprint, address):

3393

def ClientNotFound(self, key_id, address):

3226

3394

"D-Bus signal"

3227

3395

pass

3228

3396

3229

3397

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

3230

3398

"true"})

3231

3399

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

3232

3400

def ClientRemoved(self, objpath, name):

3233

3401

"D-Bus signal"

3234

3402

pass

3235

3403

3236

3404

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

3237

3405

"true"})

3238

3406

@dbus.service.method(_interface, out_signature="ao")

3240

3408

"D-Bus method"

3241

3409

return dbus.Array(c.dbus_object_path for c in

3242

3410

tcp_server.clients.values())

3243

3411

3244

3412

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

3245

3413

"true"})

3246

3414

@dbus.service.method(_interface,

3248

3416

def GetAllClientsWithProperties(self):

3249

3417

"D-Bus method"

3250

3418

return dbus.Dictionary(

3251

{ c.dbus_object_path: c.GetAll(

3419

{c.dbus_object_path: c.GetAll(

3252

3420

"se.recompile.Mandos.Client")

3253

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

3421

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

3254

3422

signature="oa{sv}")

3255

3423

3256

3424

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

3257

3425

def RemoveClient(self, object_path):

3258

3426

"D-Bus method"

3266

3434

self.client_removed_signal(c)

3267

3435

return

3268

3436

raise KeyError(object_path)

3269

3437

3270

3438

del _interface

3271

3439

3272

3440

@dbus.service.method(dbus.OBJECT_MANAGER_IFACE,

3273

out_signature = "a{oa{sa{sv}}}")

3441

out_signature="a{oa{sa{sv}}}")

3274

3442

def GetManagedObjects(self):

3275

3443

"""D-Bus method"""

3276

3444

return dbus.Dictionary(

3277

{ client.dbus_object_path:

3278

dbus.Dictionary(

3279

{ interface: client.GetAll(interface)

3280

for interface in

3281

client._get_all_interface_names()})

3282

for client in tcp_server.clients.values()})

3283

3445

{client.dbus_object_path:

3446

dbus.Dictionary(

3447

{interface: client.GetAll(interface)

3448

for interface in

3449

client._get_all_interface_names()})

3450

for client in tcp_server.clients.values()})

3451

3284

3452

def client_added_signal(self, client):

3285

3453

"""Send the new standard signal and the old signal"""

3286

3454

if use_dbus:

3288

3456

self.InterfacesAdded(

3289

3457

client.dbus_object_path,

3290

3458

dbus.Dictionary(

3291

{ interface: client.GetAll(interface)

3292

for interface in

3293

client._get_all_interface_names()}))

3459

{interface: client.GetAll(interface)

3460

for interface in

3461

client._get_all_interface_names()}))

3294

3462

# Old signal

3295

3463

self.ClientAdded(client.dbus_object_path)

3296

3464

3297

3465

def client_removed_signal(self, client):

3298

3466

"""Send the new standard signal and the old signal"""

3299

3467

if use_dbus:

3304

3472

# Old signal

3305

3473

self.ClientRemoved(client.dbus_object_path,

3306

3474

client.name)

3307

3475

3308

3476

mandos_dbus_service = MandosDBusService()

3309

3477

3478

# Save modules to variables to exempt the modules from being

3479

# unloaded before the function registered with atexit() is run.

3480

mp = multiprocessing

3481

wn = wnull

3482

3310

3483

def cleanup():

3311

3484

"Cleanup function; run on exit"

3312

3485

if zeroconf:

3313

3486

service.cleanup()

3314

3315

multiprocessing.active_children()

3316

wnull.close()

3487

3488

mp.active_children()

3489

wn.close()

3317

3490

if not (tcp_server.clients or client_settings):

3318

3491

return

3319

3492

3320

3493

# Store client before exiting. Secrets are encrypted with key

3321

3494

# based on what config file has. If config file is

3322

3495

# removed/edited, old secret will thus be unrecovable.

3327

3500

client.encrypted_secret = pgp.encrypt(client.secret,

3328

3501

key)

3329

3502

client_dict = {}

3330

3503

3331

3504

# A list of attributes that can not be pickled

3332

3505

# + secret.

3333

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

3334

"checker", "server_settings" }

3506

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

3507

"checker", "server_settings"}

3335

3508

for name, typ in inspect.getmembers(dbus.service

3336

3509

.Object):

3337

3510

exclude.add(name)

3338

3511

3339

3512

client_dict["encrypted_secret"] = (client

3340

3513

.encrypted_secret)

3341

3514

for attr in client.client_structure:

3342

3515

if attr not in exclude:

3343

3516

client_dict[attr] = getattr(client, attr)

3344

3517

3345

3518

clients[client.name] = client_dict

3346

3519

del client_settings[client.name]["secret"]

3347

3520

3348

3521

try:

3349

3522

with tempfile.NamedTemporaryFile(

3350

3523

mode='wb',

3353

3526

dir=os.path.dirname(stored_state_path),

3354

3527

delete=False) as stored_state:

3355

3528

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

3356

protocol = 2)

3529

protocol=2)

3357

3530

tempname = stored_state.name

3358

3531

os.rename(tempname, stored_state_path)

3359

3532

except (IOError, OSError) as e:

3369

3542

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

3370

3543

exc_info=e)

3371

3544

raise

3372

3545

3373

3546

# Delete all clients, and settings from config

3374

3547

while tcp_server.clients:

3375

3548

name, client = tcp_server.clients.popitem()

3381

3554

if use_dbus:

3382

3555

mandos_dbus_service.client_removed_signal(client)

3383

3556

client_settings.clear()

3384

3557

3385

3558

atexit.register(cleanup)

3386

3559

3387

3560

for client in tcp_server.clients.values():

3388

3561

if use_dbus:

3389

3562

# Emit D-Bus signal for adding

3391

3564

# Need to initiate checking of clients

3392

3565

if client.enabled:

3393

3566

client.init_checker()

3394

3567

3395

3568

tcp_server.enable()

3396

3569

tcp_server.server_activate()

3397

3570

3398

3571

# Find out what port we got

3399

3572

if zeroconf:

3400

3573

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

3405

3578

else: # IPv4

3406

3579

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

3407

3580

*tcp_server.socket.getsockname())

3408

3409

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

3410

3581

3582

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

3583

3411

3584

try:

3412

3585

if zeroconf:

3413

3586

# From the Avahi example code

3418

3591

cleanup()

3419

3592

sys.exit(1)

3420

3593

# End of Avahi example code

3421

3594

3422

3595

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

3423

3596

lambda *args, **kwargs:

3424

3597

(tcp_server.handle_request

3425

3598

(*args[2:], **kwargs) or True))

3426

3599

3427

3600

logger.debug("Starting main loop")

3428

3601

main_loop.run()

3429

3602

except AvahiError as error: