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# -*- mode: python; coding: utf-8 -*-
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# Mandos server - give out binary blobs to connecting clients.
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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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# Everything else is
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# Copyright © 2008-2018 Teddy Hogeborn
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# Copyright © 2008-2018 Björn Påhlsson
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# This file is part of Mandos.
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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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# Copyright © 2008-2015 Teddy Hogeborn
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# Copyright © 2008-2015 Björn Påhlsson
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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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# 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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# 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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# 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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# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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# GNU General Public License for more details.
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# You should have received a copy of the GNU General Public License
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# along with Mandos. If not, see <http://www.gnu.org/licenses/>.
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# along with this program. If not, see
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# <http://www.gnu.org/licenses/>.
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# Contact the authors at <mandos@recompile.se>.
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from __future__ import (division, absolute_import, print_function,
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from future_builtins import *
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from future_builtins import *
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import SocketServer as socketserver
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.replace(b"\n", b"\\n")
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.replace(b"\0", b"\\x00"))
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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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dir=self.tempdir) as passfile:
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passfile.write(passphrase)
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proc = subprocess.Popen([self.gpg, '--symmetric',
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proc = subprocess.Popen(['gpg', '--symmetric',
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'--passphrase-file',
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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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proc = subprocess.Popen([self.gpg, '--decrypt',
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proc = subprocess.Popen(['gpg', '--decrypt',
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'--passphrase-file',
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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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"""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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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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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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class AvahiError(Exception):
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def __init__(self, value, *args, **kwargs):
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self.value = value
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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 = super(AvahiServiceToSyslog, self).rename(*args, **kwargs)
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ret = AvahiService.rename(self, *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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# 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.util.find_library("gnutls")
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library = ctypes.util.find_library("gnutls-deb0")
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_library = ctypes.cdll.LoadLibrary(library)
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_need_version = b"3.3.0"
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# Need to use "self" here, since this method is called before
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# the assignment to the "gnutls" global variable happens.
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if self.check_version(self._need_version) is None:
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raise self.Error("Needs GnuTLS {} or later"
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.format(self._need_version))
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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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E_NO_CERTIFICATE_FOUND = -49
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OPENPGP_FMT_RAW = 0 # gnutls/openpgp.h
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class session_int(ctypes.Structure):
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session_t = ctypes.POINTER(session_int)
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class certificate_credentials_st(ctypes.Structure):
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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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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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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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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=()):
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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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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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class CertificateSecurityError(Error):
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class Credentials(object):
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self._c_object = gnutls.certificate_credentials_t()
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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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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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self._c_object = gnutls.session_t()
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gnutls.init(ctypes.byref(self._c_object), gnutls.CLIENT)
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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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if credentials is None:
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credentials = gnutls.Credentials()
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gnutls.credentials_set(self._c_object, credentials.type,
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ctypes.cast(credentials._c_object,
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self.credentials = credentials
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gnutls.deinit(self._c_object)
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return gnutls.handshake(self._c_object)
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def send(self, data):
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data_len -= gnutls.record_send(self._c_object,
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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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for the 'restype' attribute on ctypes functions"""
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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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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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if result not in (gnutls.E_INTERRUPTED, gnutls.E_AGAIN):
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return _error_code(result)
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result = func(*arguments)
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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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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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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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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
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record_send.argtypes = [session_t, ctypes.c_void_p,
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record_send.restype = ctypes.c_ssize_t
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record_send.errcheck = _retry_on_error
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certificate_allocate_credentials = (
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_library.gnutls_certificate_allocate_credentials)
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certificate_allocate_credentials.argtypes = [
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ctypes.POINTER(certificate_credentials_t)]
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certificate_allocate_credentials.restype = _error_code
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certificate_free_credentials = (
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_library.gnutls_certificate_free_credentials)
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certificate_free_credentials.argtypes = [
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certificate_credentials_t]
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certificate_free_credentials.restype = None
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handshake_set_private_extensions = (
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_library.gnutls_handshake_set_private_extensions)
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handshake_set_private_extensions.argtypes = [session_t,
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handshake_set_private_extensions.restype = None
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credentials_set = _library.gnutls_credentials_set
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credentials_set.argtypes = [session_t, credentials_type_t,
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credentials_set.restype = _error_code
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strerror = _library.gnutls_strerror
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strerror.argtypes = [ctypes.c_int]
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strerror.restype = ctypes.c_char_p
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certificate_type_get = _library.gnutls_certificate_type_get
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certificate_type_get.argtypes = [session_t]
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certificate_type_get.restype = _error_code
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certificate_get_peers = _library.gnutls_certificate_get_peers
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certificate_get_peers.argtypes = [session_t,
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ctypes.POINTER(ctypes.c_uint)]
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certificate_get_peers.restype = ctypes.POINTER(datum_t)
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global_set_log_level = _library.gnutls_global_set_log_level
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global_set_log_level.argtypes = [ctypes.c_int]
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global_set_log_level.restype = None
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global_set_log_function = _library.gnutls_global_set_log_function
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global_set_log_function.argtypes = [log_func]
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global_set_log_function.restype = None
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deinit = _library.gnutls_deinit
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deinit.argtypes = [session_t]
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deinit.restype = None
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handshake = _library.gnutls_handshake
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handshake.argtypes = [session_t]
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handshake.restype = _error_code
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handshake.errcheck = _retry_on_error
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transport_set_ptr = _library.gnutls_transport_set_ptr
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transport_set_ptr.argtypes = [session_t, transport_ptr_t]
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transport_set_ptr.restype = None
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bye = _library.gnutls_bye
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bye.argtypes = [session_t, close_request_t]
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bye.restype = _error_code
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bye.errcheck = _retry_on_error
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check_version = _library.gnutls_check_version
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check_version.argtypes = [ctypes.c_char_p]
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check_version.restype = ctypes.c_char_p
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# All the function declarations below are from gnutls/openpgp.h
736
openpgp_crt_init = _library.gnutls_openpgp_crt_init
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openpgp_crt_init.argtypes = [ctypes.POINTER(openpgp_crt_t)]
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openpgp_crt_init.restype = _error_code
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openpgp_crt_import = _library.gnutls_openpgp_crt_import
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openpgp_crt_import.argtypes = [openpgp_crt_t,
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ctypes.POINTER(datum_t),
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openpgp_crt_import.restype = _error_code
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openpgp_crt_verify_self = _library.gnutls_openpgp_crt_verify_self
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openpgp_crt_verify_self.argtypes = [openpgp_crt_t, ctypes.c_uint,
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ctypes.POINTER(ctypes.c_uint)]
749
openpgp_crt_verify_self.restype = _error_code
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openpgp_crt_deinit = _library.gnutls_openpgp_crt_deinit
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openpgp_crt_deinit.argtypes = [openpgp_crt_t]
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openpgp_crt_deinit.restype = None
755
openpgp_crt_get_fingerprint = (
756
_library.gnutls_openpgp_crt_get_fingerprint)
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openpgp_crt_get_fingerprint.argtypes = [openpgp_crt_t,
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openpgp_crt_get_fingerprint.restype = _error_code
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# Remove non-public functions
764
del _error_code, _retry_on_error
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# Create the global "gnutls" object, simulating a module
769
def call_pipe(connection, # : multiprocessing.Connection
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func, *args, **kwargs):
426
def subprocess_call_pipe(connection, # : multiprocessing.Connection
771
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"""This function is meant to be called by multiprocessing.Process
773
This function runs func(*args, **kwargs), and writes the resulting
774
return value on the provided multiprocessing.Connection.
430
This function runs a synchronous subprocess.call(), and writes the
431
resulting return code on the provided multiprocessing.Connection.
776
connection.send(func(*args, **kwargs))
433
connection.send(subprocess.call(*args, **kwargs))
777
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connection.close()
780
436
class Client(object):
781
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"""A representation of a client host served by this server.
784
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approved: bool(); 'None' if not yet approved/disapproved
785
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approval_delay: datetime.timedelta(); Time to wait for approval
960
614
logger.info("Disabling client %s", self.name)
961
615
if getattr(self, "disable_initiator_tag", None) is not None:
962
GLib.source_remove(self.disable_initiator_tag)
616
gobject.source_remove(self.disable_initiator_tag)
963
617
self.disable_initiator_tag = None
964
618
self.expires = None
965
619
if getattr(self, "checker_initiator_tag", None) is not None:
966
GLib.source_remove(self.checker_initiator_tag)
620
gobject.source_remove(self.checker_initiator_tag)
967
621
self.checker_initiator_tag = None
968
622
self.stop_checker()
969
623
self.enabled = False
971
625
self.send_changedstate()
972
# Do not run this again if called by a GLib.timeout_add
626
# Do not run this again if called by a gobject.timeout_add
975
629
def __del__(self):
978
632
def init_checker(self):
979
633
# Schedule a new checker to be started an 'interval' from now,
980
634
# and every interval from then on.
981
635
if self.checker_initiator_tag is not None:
982
GLib.source_remove(self.checker_initiator_tag)
983
self.checker_initiator_tag = GLib.timeout_add(
636
gobject.source_remove(self.checker_initiator_tag)
637
self.checker_initiator_tag = gobject.timeout_add(
984
638
int(self.interval.total_seconds() * 1000),
985
639
self.start_checker)
986
640
# Schedule a disable() when 'timeout' has passed
987
641
if self.disable_initiator_tag is not None:
988
GLib.source_remove(self.disable_initiator_tag)
989
self.disable_initiator_tag = GLib.timeout_add(
642
gobject.source_remove(self.disable_initiator_tag)
643
self.disable_initiator_tag = gobject.timeout_add(
990
644
int(self.timeout.total_seconds() * 1000), self.disable)
991
645
# Also start a new checker *right now*.
992
646
self.start_checker()
994
def checker_callback(self, source, condition, connection,
648
def checker_callback(self, source, condition,
649
(connection, command)):
996
650
"""The checker has completed, so take appropriate actions."""
997
651
self.checker_callback_tag = None
998
652
self.checker = None
999
# Read return code from connection (see call_pipe)
653
# Read return code from connection (see subprocess_call_pipe)
1000
654
returncode = connection.recv()
1001
655
connection.close()
1003
657
if returncode >= 0:
1004
658
self.last_checker_status = returncode
1005
659
self.last_checker_signal = None
1230
882
for cls in self.__class__.__mro__
1231
883
for name, athing in
1232
884
inspect.getmembers(cls, self._is_dbus_thing(thing)))
1234
@dbus.service.method(dbus.INTROSPECTABLE_IFACE,
1236
path_keyword='object_path',
1237
connection_keyword='connection')
1238
def Introspect(self, object_path, connection):
1239
"""Overloading of standard D-Bus method.
1241
Inserts annotation tags on methods and signals.
1243
xmlstring = dbus.service.Object.Introspect(self, object_path,
1246
document = xml.dom.minidom.parseString(xmlstring)
1248
for if_tag in document.getElementsByTagName("interface"):
1249
# Add annotation tags
1250
for typ in ("method", "signal"):
1251
for tag in if_tag.getElementsByTagName(typ):
1253
for name, prop in (self.
1254
_get_all_dbus_things(typ)):
1255
if (name == tag.getAttribute("name")
1256
and prop._dbus_interface
1257
== if_tag.getAttribute("name")):
1258
annots.update(getattr(
1259
prop, "_dbus_annotations", {}))
1260
for name, value in annots.items():
1261
ann_tag = document.createElement(
1263
ann_tag.setAttribute("name", name)
1264
ann_tag.setAttribute("value", value)
1265
tag.appendChild(ann_tag)
1266
# Add interface annotation tags
1267
for annotation, value in dict(
1268
itertools.chain.from_iterable(
1269
annotations().items()
1270
for name, annotations
1271
in self._get_all_dbus_things("interface")
1272
if name == if_tag.getAttribute("name")
1274
ann_tag = document.createElement("annotation")
1275
ann_tag.setAttribute("name", annotation)
1276
ann_tag.setAttribute("value", value)
1277
if_tag.appendChild(ann_tag)
1278
# Fix argument name for the Introspect method itself
1279
if (if_tag.getAttribute("name")
1280
== dbus.INTROSPECTABLE_IFACE):
1281
for cn in if_tag.getElementsByTagName("method"):
1282
if cn.getAttribute("name") == "Introspect":
1283
for arg in cn.getElementsByTagName("arg"):
1284
if (arg.getAttribute("direction")
1286
arg.setAttribute("name",
1288
xmlstring = document.toxml("utf-8")
1290
except (AttributeError, xml.dom.DOMException,
1291
xml.parsers.expat.ExpatError) as error:
1292
logger.error("Failed to override Introspection method",
1297
class DBusObjectWithProperties(DBusObjectWithAnnotations):
1298
"""A D-Bus object with properties.
1300
Classes inheriting from this can use the dbus_service_property
1301
decorator to expose methods as D-Bus properties. It exposes the
1302
standard Get(), Set(), and GetAll() methods on the D-Bus.
1305
886
def _get_dbus_property(self, interface_name, property_name):
1306
887
"""Returns a bound method if one exists which is a D-Bus
1307
888
property with the specified name and interface.
1422
993
if prop._dbus_interface
1423
994
== if_tag.getAttribute("name")):
1424
995
if_tag.appendChild(tag)
1425
# Add annotation tags for properties
1426
for tag in if_tag.getElementsByTagName("property"):
1428
for name, prop in self._get_all_dbus_things(
1430
if (name == tag.getAttribute("name")
1431
and prop._dbus_interface
1432
== if_tag.getAttribute("name")):
1433
annots.update(getattr(
1434
prop, "_dbus_annotations", {}))
1435
for name, value in annots.items():
1436
ann_tag = document.createElement(
1438
ann_tag.setAttribute("name", name)
1439
ann_tag.setAttribute("value", value)
1440
tag.appendChild(ann_tag)
996
# Add annotation tags
997
for typ in ("method", "signal", "property"):
998
for tag in if_tag.getElementsByTagName(typ):
1000
for name, prop in (self.
1001
_get_all_dbus_things(typ)):
1002
if (name == tag.getAttribute("name")
1003
and prop._dbus_interface
1004
== if_tag.getAttribute("name")):
1005
annots.update(getattr(
1006
prop, "_dbus_annotations", {}))
1007
for name, value in annots.items():
1008
ann_tag = document.createElement(
1010
ann_tag.setAttribute("name", name)
1011
ann_tag.setAttribute("value", value)
1012
tag.appendChild(ann_tag)
1013
# Add interface annotation tags
1014
for annotation, value in dict(
1015
itertools.chain.from_iterable(
1016
annotations().items()
1017
for name, annotations
1018
in self._get_all_dbus_things("interface")
1019
if name == if_tag.getAttribute("name")
1021
ann_tag = document.createElement("annotation")
1022
ann_tag.setAttribute("name", annotation)
1023
ann_tag.setAttribute("value", value)
1024
if_tag.appendChild(ann_tag)
1441
1025
# Add the names to the return values for the
1442
1026
# "org.freedesktop.DBus.Properties" methods
1443
1027
if (if_tag.getAttribute("name")
1462
1046
return xmlstring
1466
dbus.OBJECT_MANAGER_IFACE
1467
except AttributeError:
1468
dbus.OBJECT_MANAGER_IFACE = "org.freedesktop.DBus.ObjectManager"
1471
class DBusObjectWithObjectManager(DBusObjectWithAnnotations):
1472
"""A D-Bus object with an ObjectManager.
1474
Classes inheriting from this exposes the standard
1475
GetManagedObjects call and the InterfacesAdded and
1476
InterfacesRemoved signals on the standard
1477
"org.freedesktop.DBus.ObjectManager" interface.
1479
Note: No signals are sent automatically; they must be sent
1482
@dbus.service.method(dbus.OBJECT_MANAGER_IFACE,
1483
out_signature="a{oa{sa{sv}}}")
1484
def GetManagedObjects(self):
1485
"""This function must be overridden"""
1486
raise NotImplementedError()
1488
@dbus.service.signal(dbus.OBJECT_MANAGER_IFACE,
1489
signature="oa{sa{sv}}")
1490
def InterfacesAdded(self, object_path, interfaces_and_properties):
1493
@dbus.service.signal(dbus.OBJECT_MANAGER_IFACE, signature="oas")
1494
def InterfacesRemoved(self, object_path, interfaces):
1497
@dbus.service.method(dbus.INTROSPECTABLE_IFACE,
1499
path_keyword='object_path',
1500
connection_keyword='connection')
1501
def Introspect(self, object_path, connection):
1502
"""Overloading of standard D-Bus method.
1504
Override return argument name of GetManagedObjects to be
1505
"objpath_interfaces_and_properties"
1507
xmlstring = DBusObjectWithAnnotations.Introspect(self,
1511
document = xml.dom.minidom.parseString(xmlstring)
1513
for if_tag in document.getElementsByTagName("interface"):
1514
# Fix argument name for the GetManagedObjects method
1515
if (if_tag.getAttribute("name")
1516
== dbus.OBJECT_MANAGER_IFACE):
1517
for cn in if_tag.getElementsByTagName("method"):
1518
if (cn.getAttribute("name")
1519
== "GetManagedObjects"):
1520
for arg in cn.getElementsByTagName("arg"):
1521
if (arg.getAttribute("direction")
1525
"objpath_interfaces"
1527
xmlstring = document.toxml("utf-8")
1529
except (AttributeError, xml.dom.DOMException,
1530
xml.parsers.expat.ExpatError) as error:
1531
logger.error("Failed to override Introspection method",
1536
1049
def datetime_to_dbus(dt, variant_level=0):
1537
1050
"""Convert a UTC datetime.datetime() to a D-Bus type."""
1539
return dbus.String("", variant_level=variant_level)
1052
return dbus.String("", variant_level = variant_level)
1540
1053
return dbus.String(dt.isoformat(), variant_level=variant_level)
2190
1684
class ClientHandler(socketserver.BaseRequestHandler, object):
2191
1685
"""A class to handle client connections.
2193
1687
Instantiated once for each connection to handle it.
2194
1688
Note: This will run in its own forked process."""
2196
1690
def handle(self):
2197
1691
with contextlib.closing(self.server.child_pipe) as child_pipe:
2198
1692
logger.info("TCP connection from: %s",
2199
1693
str(self.client_address))
2200
1694
logger.debug("Pipe FD: %d",
2201
1695
self.server.child_pipe.fileno())
2203
session = gnutls.ClientSession(self.request)
2205
# priority = ':'.join(("NONE", "+VERS-TLS1.1",
2206
# "+AES-256-CBC", "+SHA1",
2207
# "+COMP-NULL", "+CTYPE-OPENPGP",
1697
session = gnutls.connection.ClientSession(
1698
self.request, gnutls.connection .X509Credentials())
1700
# Note: gnutls.connection.X509Credentials is really a
1701
# generic GnuTLS certificate credentials object so long as
1702
# no X.509 keys are added to it. Therefore, we can use it
1703
# here despite using OpenPGP certificates.
1705
#priority = ':'.join(("NONE", "+VERS-TLS1.1",
1706
# "+AES-256-CBC", "+SHA1",
1707
# "+COMP-NULL", "+CTYPE-OPENPGP",
2209
1709
# Use a fallback default, since this MUST be set.
2210
1710
priority = self.server.gnutls_priority
2211
1711
if priority is None:
2212
1712
priority = "NORMAL"
2213
gnutls.priority_set_direct(session._c_object,
2214
priority.encode("utf-8"),
1713
gnutls.library.functions.gnutls_priority_set_direct(
1714
session._c_object, priority, None)
2217
1716
# Start communication using the Mandos protocol
2218
1717
# Get protocol number
2219
1718
line = self.request.makefile().readline()
2305
1805
delay -= time2 - time
2308
session.send(client.secret)
2309
except gnutls.Error as error:
2310
logger.warning("gnutls send failed",
1808
while sent_size < len(client.secret):
1810
sent = session.send(client.secret[sent_size:])
1811
except gnutls.errors.GNUTLSError as error:
1812
logger.warning("gnutls send failed",
1815
logger.debug("Sent: %d, remaining: %d", sent,
1816
len(client.secret) - (sent_size
2314
1820
logger.info("Sending secret to %s", client.name)
2315
1821
# bump the timeout using extended_timeout
2316
1822
client.bump_timeout(client.extended_timeout)
2317
1823
if self.server.use_dbus:
2318
1824
# Emit D-Bus signal
2319
1825
client.GotSecret()
2322
1828
if approval_required:
2323
1829
client.approvals_pending -= 1
2326
except gnutls.Error as error:
1832
except gnutls.errors.GNUTLSError as error:
2327
1833
logger.warning("GnuTLS bye failed",
2328
1834
exc_info=error)
2331
1837
def peer_certificate(session):
2332
1838
"Return the peer's OpenPGP certificate as a bytestring"
2333
1839
# If not an OpenPGP certificate...
2334
if (gnutls.certificate_type_get(session._c_object)
2335
!= gnutls.CRT_OPENPGP):
2336
# ...return invalid data
1840
if (gnutls.library.functions.gnutls_certificate_type_get(
1842
!= gnutls.library.constants.GNUTLS_CRT_OPENPGP):
1843
# ...do the normal thing
1844
return session.peer_certificate
2338
1845
list_size = ctypes.c_uint(1)
2339
cert_list = (gnutls.certificate_get_peers
1846
cert_list = (gnutls.library.functions
1847
.gnutls_certificate_get_peers
2340
1848
(session._c_object, ctypes.byref(list_size)))
2341
1849
if not bool(cert_list) and list_size.value != 0:
2342
raise gnutls.Error("error getting peer certificate")
1850
raise gnutls.errors.GNUTLSError("error getting peer"
2343
1852
if list_size.value == 0:
2345
1854
cert = cert_list[0]
2346
1855
return ctypes.string_at(cert.data, cert.size)
2349
1858
def fingerprint(openpgp):
2350
1859
"Convert an OpenPGP bytestring to a hexdigit fingerprint"
2351
1860
# New GnuTLS "datum" with the OpenPGP public key
2352
datum = gnutls.datum_t(
1861
datum = gnutls.library.types.gnutls_datum_t(
2353
1862
ctypes.cast(ctypes.c_char_p(openpgp),
2354
1863
ctypes.POINTER(ctypes.c_ubyte)),
2355
1864
ctypes.c_uint(len(openpgp)))
2356
1865
# New empty GnuTLS certificate
2357
crt = gnutls.openpgp_crt_t()
2358
gnutls.openpgp_crt_init(ctypes.byref(crt))
1866
crt = gnutls.library.types.gnutls_openpgp_crt_t()
1867
gnutls.library.functions.gnutls_openpgp_crt_init(
2359
1869
# Import the OpenPGP public key into the certificate
2360
gnutls.openpgp_crt_import(crt, ctypes.byref(datum),
2361
gnutls.OPENPGP_FMT_RAW)
1870
gnutls.library.functions.gnutls_openpgp_crt_import(
1871
crt, ctypes.byref(datum),
1872
gnutls.library.constants.GNUTLS_OPENPGP_FMT_RAW)
2362
1873
# Verify the self signature in the key
2363
1874
crtverify = ctypes.c_uint()
2364
gnutls.openpgp_crt_verify_self(crt, 0,
2365
ctypes.byref(crtverify))
1875
gnutls.library.functions.gnutls_openpgp_crt_verify_self(
1876
crt, 0, ctypes.byref(crtverify))
2366
1877
if crtverify.value != 0:
2367
gnutls.openpgp_crt_deinit(crt)
2368
raise gnutls.CertificateSecurityError(code
1878
gnutls.library.functions.gnutls_openpgp_crt_deinit(crt)
1879
raise gnutls.errors.CertificateSecurityError(
2370
1881
# New buffer for the fingerprint
2371
1882
buf = ctypes.create_string_buffer(20)
2372
1883
buf_len = ctypes.c_size_t()
2373
1884
# Get the fingerprint from the certificate into the buffer
2374
gnutls.openpgp_crt_get_fingerprint(crt, ctypes.byref(buf),
2375
ctypes.byref(buf_len))
1885
gnutls.library.functions.gnutls_openpgp_crt_get_fingerprint(
1886
crt, ctypes.byref(buf), ctypes.byref(buf_len))
2376
1887
# Deinit the certificate
2377
gnutls.openpgp_crt_deinit(crt)
1888
gnutls.library.functions.gnutls_openpgp_crt_deinit(crt)
2378
1889
# Convert the buffer to a Python bytestring
2379
1890
fpr = ctypes.string_at(buf, buf_len.value)
2380
1891
# Convert the bytestring to hexadecimal notation
2469
1979
# socket_wrapper(), if socketfd was set.
2470
1980
socketserver.TCPServer.__init__(self, server_address,
2471
1981
RequestHandlerClass)
2473
1983
def server_bind(self):
2474
1984
"""This overrides the normal server_bind() function
2475
1985
to bind to an interface if one was specified, and also NOT to
2476
1986
bind to an address or port if they were not specified."""
2477
global SO_BINDTODEVICE
2478
1987
if self.interface is not None:
2479
1988
if SO_BINDTODEVICE is None:
2480
# Fall back to a hard-coded value which seems to be
2482
logger.warning("SO_BINDTODEVICE not found, trying 25")
2483
SO_BINDTODEVICE = 25
2485
self.socket.setsockopt(
2486
socket.SOL_SOCKET, SO_BINDTODEVICE,
2487
(self.interface + "\0").encode("utf-8"))
2488
except socket.error as error:
2489
if error.errno == errno.EPERM:
2490
logger.error("No permission to bind to"
2491
" interface %s", self.interface)
2492
elif error.errno == errno.ENOPROTOOPT:
2493
logger.error("SO_BINDTODEVICE not available;"
2494
" cannot bind to interface %s",
2496
elif error.errno == errno.ENODEV:
2497
logger.error("Interface %s does not exist,"
2498
" cannot bind", self.interface)
1989
logger.error("SO_BINDTODEVICE does not exist;"
1990
" cannot bind to interface %s",
1994
self.socket.setsockopt(
1995
socket.SOL_SOCKET, SO_BINDTODEVICE,
1996
(self.interface + "\0").encode("utf-8"))
1997
except socket.error as error:
1998
if error.errno == errno.EPERM:
1999
logger.error("No permission to bind to"
2000
" interface %s", self.interface)
2001
elif error.errno == errno.ENOPROTOOPT:
2002
logger.error("SO_BINDTODEVICE not available;"
2003
" cannot bind to interface %s",
2005
elif error.errno == errno.ENODEV:
2006
logger.error("Interface %s does not exist,"
2007
" cannot bind", self.interface)
2501
2010
# Only bind(2) the socket if we really need to.
2502
2011
if self.server_address[0] or self.server_address[1]:
2503
2012
if not self.server_address[0]:
2504
2013
if self.address_family == socket.AF_INET6:
2505
any_address = "::" # in6addr_any
2014
any_address = "::" # in6addr_any
2507
any_address = "0.0.0.0" # INADDR_ANY
2016
any_address = "0.0.0.0" # INADDR_ANY
2508
2017
self.server_address = (any_address,
2509
2018
self.server_address[1])
2510
2019
elif not self.server_address[1]:
3065
2571
protocol = avahi.PROTO_INET6 if use_ipv6 else avahi.PROTO_INET
3066
2572
service = AvahiServiceToSyslog(
3067
name=server_settings["servicename"],
3068
servicetype="_mandos._tcp",
2573
name = server_settings["servicename"],
2574
servicetype = "_mandos._tcp",
2575
protocol = protocol,
3071
2577
if server_settings["interface"]:
3072
2578
service.interface = if_nametoindex(
3073
2579
server_settings["interface"].encode("utf-8"))
3075
2581
global multiprocessing_manager
3076
2582
multiprocessing_manager = multiprocessing.Manager()
3078
2584
client_class = Client
3080
client_class = functools.partial(ClientDBus, bus=bus)
2586
client_class = functools.partial(ClientDBus, bus = bus)
3082
2588
client_settings = Client.config_parser(client_config)
3083
2589
old_client_settings = {}
3084
2590
clients_data = {}
3086
2592
# This is used to redirect stdout and stderr for checker processes
3088
wnull = open(os.devnull, "w") # A writable /dev/null
2594
wnull = open(os.devnull, "w") # A writable /dev/null
3089
2595
# Only used if server is running in foreground but not in debug
3091
2597
if debug or not foreground:
3094
2600
# Get client data and settings from last running state.
3095
2601
if server_settings["restore"]:
3097
2603
with open(stored_state_path, "rb") as stored_state:
3098
if sys.version_info.major == 2:
3099
clients_data, old_client_settings = pickle.load(
3102
bytes_clients_data, bytes_old_client_settings = (
3103
pickle.load(stored_state, encoding="bytes"))
3104
# Fix bytes to strings
3107
clients_data = {(key.decode("utf-8")
3108
if isinstance(key, bytes)
3111
bytes_clients_data.items()}
3112
del bytes_clients_data
3113
for key in clients_data:
3114
value = {(k.decode("utf-8")
3115
if isinstance(k, bytes) else k): v
3117
clients_data[key].items()}
3118
clients_data[key] = value
3120
value["client_structure"] = [
3122
if isinstance(s, bytes)
3124
value["client_structure"]]
3126
for k in ("name", "host"):
3127
if isinstance(value[k], bytes):
3128
value[k] = value[k].decode("utf-8")
3129
# old_client_settings
3131
old_client_settings = {
3132
(key.decode("utf-8")
3133
if isinstance(key, bytes)
3136
bytes_old_client_settings.items()}
3137
del bytes_old_client_settings
3139
for value in old_client_settings.values():
3140
if isinstance(value["host"], bytes):
3141
value["host"] = (value["host"]
2604
clients_data, old_client_settings = pickle.load(
3143
2606
os.remove(stored_state_path)
3144
2607
except IOError as e:
3145
2608
if e.errno == errno.ENOENT:
3223
2686
for client_name in (set(client_settings)
3224
2687
- set(old_client_settings)):
3225
2688
clients_data[client_name] = client_settings[client_name]
3227
2690
# Create all client objects
3228
2691
for client_name, client in clients_data.items():
3229
2692
tcp_server.clients[client_name] = client_class(
3232
server_settings=server_settings)
2695
server_settings = server_settings)
3234
2697
if not tcp_server.clients:
3235
2698
logger.warning("No clients defined")
3237
2700
if not foreground:
3238
2701
if pidfile is not None:
3242
print(pid, file=pidfile)
2705
pidfile.write("{}\n".format(pid).encode("utf-8"))
3243
2706
except IOError:
3244
2707
logger.error("Could not write to file %r with PID %d",
3245
2708
pidfilename, pid)
3247
2710
del pidfilename
3249
for termsig in (signal.SIGHUP, signal.SIGTERM):
3250
GLib.unix_signal_add(GLib.PRIORITY_HIGH, termsig,
3251
lambda: main_loop.quit() and False)
2712
signal.signal(signal.SIGHUP, lambda signum, frame: sys.exit())
2713
signal.signal(signal.SIGTERM, lambda signum, frame: sys.exit())
3255
2717
@alternate_dbus_interfaces(
3256
{"se.recompile.Mandos": "se.bsnet.fukt.Mandos"})
3257
class MandosDBusService(DBusObjectWithObjectManager):
2718
{ "se.recompile.Mandos": "se.bsnet.fukt.Mandos" })
2719
class MandosDBusService(DBusObjectWithProperties):
3258
2720
"""A D-Bus proxy object"""
3260
2722
def __init__(self):
3261
2723
dbus.service.Object.__init__(self, bus, "/")
3263
2725
_interface = "se.recompile.Mandos"
2727
@dbus_interface_annotations(_interface)
2730
"org.freedesktop.DBus.Property.EmitsChangedSignal":
3265
2733
@dbus.service.signal(_interface, signature="o")
3266
2734
def ClientAdded(self, objpath):
3270
2738
@dbus.service.signal(_interface, signature="ss")
3271
2739
def ClientNotFound(self, fingerprint, address):
3275
@dbus_annotations({"org.freedesktop.DBus.Deprecated":
3277
2743
@dbus.service.signal(_interface, signature="os")
3278
2744
def ClientRemoved(self, objpath, name):
3282
@dbus_annotations({"org.freedesktop.DBus.Deprecated":
3284
2748
@dbus.service.method(_interface, out_signature="ao")
3285
2749
def GetAllClients(self):
3287
2751
return dbus.Array(c.dbus_object_path for c in
3288
tcp_server.clients.values())
3290
@dbus_annotations({"org.freedesktop.DBus.Deprecated":
2752
tcp_server.clients.itervalues())
3292
2754
@dbus.service.method(_interface,
3293
2755
out_signature="a{oa{sv}}")
3294
2756
def GetAllClientsWithProperties(self):
3296
2758
return dbus.Dictionary(
3297
{c.dbus_object_path: c.GetAll(
3298
"se.recompile.Mandos.Client")
3299
for c in tcp_server.clients.values()},
2759
{ c.dbus_object_path: c.GetAll("")
2760
for c in tcp_server.clients.itervalues() },
3300
2761
signature="oa{sv}")
3302
2763
@dbus.service.method(_interface, in_signature="o")
3303
2764
def RemoveClient(self, object_path):
3305
for c in tcp_server.clients.values():
2766
for c in tcp_server.clients.itervalues():
3306
2767
if c.dbus_object_path == object_path:
3307
2768
del tcp_server.clients[c.name]
3308
2769
c.remove_from_connection()
3309
# Don't signal the disabling
2770
# Don't signal anything except ClientRemoved
3310
2771
c.disable(quiet=True)
3311
# Emit D-Bus signal for removal
3312
self.client_removed_signal(c)
2773
self.ClientRemoved(object_path, c.name)
3314
2775
raise KeyError(object_path)
3318
@dbus.service.method(dbus.OBJECT_MANAGER_IFACE,
3319
out_signature="a{oa{sa{sv}}}")
3320
def GetManagedObjects(self):
3322
return dbus.Dictionary(
3323
{client.dbus_object_path:
3325
{interface: client.GetAll(interface)
3327
client._get_all_interface_names()})
3328
for client in tcp_server.clients.values()})
3330
def client_added_signal(self, client):
3331
"""Send the new standard signal and the old signal"""
3333
# New standard signal
3334
self.InterfacesAdded(
3335
client.dbus_object_path,
3337
{interface: client.GetAll(interface)
3339
client._get_all_interface_names()}))
3341
self.ClientAdded(client.dbus_object_path)
3343
def client_removed_signal(self, client):
3344
"""Send the new standard signal and the old signal"""
3346
# New standard signal
3347
self.InterfacesRemoved(
3348
client.dbus_object_path,
3349
client._get_all_interface_names())
3351
self.ClientRemoved(client.dbus_object_path,
3354
2779
mandos_dbus_service = MandosDBusService()
3356
# Save modules to variables to exempt the modules from being
3357
# unloaded before the function registered with atexit() is run.
3358
mp = multiprocessing
3362
2782
"Cleanup function; run on exit"
3364
2784
service.cleanup()
3366
mp.active_children()
2786
multiprocessing.active_children()
3368
2788
if not (tcp_server.clients or client_settings):
3371
2791
# Store client before exiting. Secrets are encrypted with key
3372
2792
# based on what config file has. If config file is
3373
2793
# removed/edited, old secret will thus be unrecovable.
3375
2795
with PGPEngine() as pgp:
3376
for client in tcp_server.clients.values():
2796
for client in tcp_server.clients.itervalues():
3377
2797
key = client_settings[client.name]["secret"]
3378
2798
client.encrypted_secret = pgp.encrypt(client.secret,
3380
2800
client_dict = {}
3382
2802
# A list of attributes that can not be pickled
3384
exclude = {"bus", "changedstate", "secret",
3385
"checker", "server_settings"}
2804
exclude = { "bus", "changedstate", "secret",
2805
"checker", "server_settings" }
3386
2806
for name, typ in inspect.getmembers(dbus.service
3388
2808
exclude.add(name)
3390
2810
client_dict["encrypted_secret"] = (client
3391
2811
.encrypted_secret)
3392
2812
for attr in client.client_structure:
3393
2813
if attr not in exclude:
3394
2814
client_dict[attr] = getattr(client, attr)
3396
2816
clients[client.name] = client_dict
3397
2817
del client_settings[client.name]["secret"]
3400
2820
with tempfile.NamedTemporaryFile(