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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 © 2008-2015 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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# Copyright © 2008-2017 Teddy Hogeborn
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# Copyright © 2008-2017 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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# 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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# 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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# 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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# along with Mandos. If not, see <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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import SocketServer as socketserver
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import gnutls.connection
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import gnutls.library.functions
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import gnutls.library.constants
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import gnutls.library.types
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import ConfigParser as configparser
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import ConfigParser as configparser
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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(['gpg', '--symmetric',
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proc = subprocess.Popen([self.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(['gpg', '--decrypt',
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proc = subprocess.Popen([self.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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# 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)]
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openpgp_crt_verify_self.restype = _error_code
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openpgp_crt_deinit = _library.gnutls_openpgp_crt_deinit
752
openpgp_crt_deinit.argtypes = [openpgp_crt_t]
753
openpgp_crt_deinit.restype = None
755
openpgp_crt_get_fingerprint = (
756
_library.gnutls_openpgp_crt_get_fingerprint)
757
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
765
# Create the global "gnutls" object, simulating a module
769
def call_pipe(connection, # : multiprocessing.Connection
770
func, *args, **kwargs):
771
"""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.
776
connection.send(func(*args, **kwargs))
415
780
class Client(object):
416
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"""A representation of a client host served by this server.
419
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approved: bool(); 'None' if not yet approved/disapproved
420
785
approval_delay: datetime.timedelta(); Time to wait for approval
591
960
logger.info("Disabling client %s", self.name)
592
961
if getattr(self, "disable_initiator_tag", None) is not None:
593
gobject.source_remove(self.disable_initiator_tag)
962
GLib.source_remove(self.disable_initiator_tag)
594
963
self.disable_initiator_tag = None
595
964
self.expires = None
596
965
if getattr(self, "checker_initiator_tag", None) is not None:
597
gobject.source_remove(self.checker_initiator_tag)
966
GLib.source_remove(self.checker_initiator_tag)
598
967
self.checker_initiator_tag = None
599
968
self.stop_checker()
600
969
self.enabled = False
602
971
self.send_changedstate()
603
# Do not run this again if called by a gobject.timeout_add
972
# Do not run this again if called by a GLib.timeout_add
606
975
def __del__(self):
609
978
def init_checker(self):
610
979
# Schedule a new checker to be started an 'interval' from now,
611
980
# and every interval from then on.
612
981
if self.checker_initiator_tag is not None:
613
gobject.source_remove(self.checker_initiator_tag)
614
self.checker_initiator_tag = gobject.timeout_add(
982
GLib.source_remove(self.checker_initiator_tag)
983
self.checker_initiator_tag = GLib.timeout_add(
615
984
int(self.interval.total_seconds() * 1000),
616
985
self.start_checker)
617
986
# Schedule a disable() when 'timeout' has passed
618
987
if self.disable_initiator_tag is not None:
619
gobject.source_remove(self.disable_initiator_tag)
620
self.disable_initiator_tag = gobject.timeout_add(
988
GLib.source_remove(self.disable_initiator_tag)
989
self.disable_initiator_tag = GLib.timeout_add(
621
990
int(self.timeout.total_seconds() * 1000), self.disable)
622
991
# Also start a new checker *right now*.
623
992
self.start_checker()
625
def checker_callback(self, pid, condition, command):
994
def checker_callback(self, source, condition, connection,
626
996
"""The checker has completed, so take appropriate actions."""
627
997
self.checker_callback_tag = None
628
998
self.checker = None
629
if os.WIFEXITED(condition):
630
self.last_checker_status = os.WEXITSTATUS(condition)
999
# Read return code from connection (see call_pipe)
1000
returncode = connection.recv()
1004
self.last_checker_status = returncode
1005
self.last_checker_signal = None
631
1006
if self.last_checker_status == 0:
632
1007
logger.info("Checker for %(name)s succeeded",
703
1071
return True # Try again later
704
1072
self.current_checker_command = command
706
logger.info("Starting checker %r for %s", command,
708
# We don't need to redirect stdout and stderr, since
709
# in normal mode, that is already done by daemon(),
710
# and in debug mode we don't want to. (Stdin is
711
# always replaced by /dev/null.)
712
# The exception is when not debugging but nevertheless
713
# running in the foreground; use the previously
716
if (not self.server_settings["debug"]
717
and self.server_settings["foreground"]):
718
popen_args.update({"stdout": wnull,
720
self.checker = subprocess.Popen(command,
725
except OSError as error:
726
logger.error("Failed to start subprocess",
729
self.checker_callback_tag = gobject.child_watch_add(
730
self.checker.pid, self.checker_callback, data=command)
731
# The checker may have completed before the gobject
732
# watch was added. Check for this.
734
pid, status = os.waitpid(self.checker.pid, os.WNOHANG)
735
except OSError as error:
736
if error.errno == errno.ECHILD:
737
# This should never happen
738
logger.error("Child process vanished",
743
gobject.source_remove(self.checker_callback_tag)
744
self.checker_callback(pid, status, command)
745
# Re-run this periodically if run by gobject.timeout_add
1073
logger.info("Starting checker %r for %s", command,
1075
# We don't need to redirect stdout and stderr, since
1076
# in normal mode, that is already done by daemon(),
1077
# and in debug mode we don't want to. (Stdin is
1078
# always replaced by /dev/null.)
1079
# The exception is when not debugging but nevertheless
1080
# running in the foreground; use the previously
1082
popen_args = {"close_fds": True,
1085
if (not self.server_settings["debug"]
1086
and self.server_settings["foreground"]):
1087
popen_args.update({"stdout": wnull,
1089
pipe = multiprocessing.Pipe(duplex=False)
1090
self.checker = multiprocessing.Process(
1092
args=(pipe[1], subprocess.call, command),
1094
self.checker.start()
1095
self.checker_callback_tag = GLib.io_add_watch(
1096
pipe[0].fileno(), GLib.IO_IN,
1097
self.checker_callback, pipe[0], command)
1098
# Re-run this periodically if run by GLib.timeout_add
748
1101
def stop_checker(self):
749
1102
"""Force the checker process, if any, to stop."""
750
1103
if self.checker_callback_tag:
751
gobject.source_remove(self.checker_callback_tag)
1104
GLib.source_remove(self.checker_callback_tag)
752
1105
self.checker_callback_tag = None
753
1106
if getattr(self, "checker", None) is None:
755
1108
logger.debug("Stopping checker for %(name)s", vars(self))
757
self.checker.terminate()
759
#if self.checker.poll() is None:
760
# self.checker.kill()
761
except OSError as error:
762
if error.errno != errno.ESRCH: # No such process
1109
self.checker.terminate()
764
1110
self.checker = None
883
1230
for cls in self.__class__.__mro__
884
1231
for name, athing in
885
1232
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.
887
1305
def _get_dbus_property(self, interface_name, property_name):
888
1306
"""Returns a bound method if one exists which is a D-Bus
889
1307
property with the specified name and interface.
994
1422
if prop._dbus_interface
995
1423
== if_tag.getAttribute("name")):
996
1424
if_tag.appendChild(tag)
997
# Add annotation tags
998
for typ in ("method", "signal", "property"):
999
for tag in if_tag.getElementsByTagName(typ):
1001
for name, prop in (self.
1002
_get_all_dbus_things(typ)):
1003
if (name == tag.getAttribute("name")
1004
and prop._dbus_interface
1005
== if_tag.getAttribute("name")):
1006
annots.update(getattr(
1007
prop, "_dbus_annotations", {}))
1008
for name, value in annots.items():
1009
ann_tag = document.createElement(
1011
ann_tag.setAttribute("name", name)
1012
ann_tag.setAttribute("value", value)
1013
tag.appendChild(ann_tag)
1014
# Add interface annotation tags
1015
for annotation, value in dict(
1016
itertools.chain.from_iterable(
1017
annotations().items()
1018
for name, annotations
1019
in self._get_all_dbus_things("interface")
1020
if name == if_tag.getAttribute("name")
1022
ann_tag = document.createElement("annotation")
1023
ann_tag.setAttribute("name", annotation)
1024
ann_tag.setAttribute("value", value)
1025
if_tag.appendChild(ann_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)
1026
1441
# Add the names to the return values for the
1027
1442
# "org.freedesktop.DBus.Properties" methods
1028
1443
if (if_tag.getAttribute("name")
1047
1462
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",
1050
1536
def datetime_to_dbus(dt, variant_level=0):
1051
1537
"""Convert a UTC datetime.datetime() to a D-Bus type."""
1053
return dbus.String("", variant_level = variant_level)
1539
return dbus.String("", variant_level=variant_level)
1054
1540
return dbus.String(dt.isoformat(), variant_level=variant_level)
1342
1828
if hasattr(DBusObjectWithProperties, "__del__"):
1343
1829
DBusObjectWithProperties.__del__(self, *args, **kwargs)
1344
1830
Client.__del__(self, *args, **kwargs)
1346
def checker_callback(self, pid, condition, command,
1348
self.checker_callback_tag = None
1350
if os.WIFEXITED(condition):
1351
exitstatus = os.WEXITSTATUS(condition)
1832
def checker_callback(self, source, condition,
1833
connection, command, *args, **kwargs):
1834
ret = Client.checker_callback(self, source, condition,
1835
connection, command, *args,
1837
exitstatus = self.last_checker_status
1352
1839
# Emit D-Bus signal
1353
1840
self.CheckerCompleted(dbus.Int16(exitstatus),
1354
dbus.Int64(condition),
1841
# This is specific to GNU libC
1842
dbus.Int64(exitstatus << 8),
1355
1843
dbus.String(command))
1357
1845
# Emit D-Bus signal
1358
1846
self.CheckerCompleted(dbus.Int16(-1),
1359
dbus.Int64(condition),
1848
# This is specific to GNU libC
1850
| self.last_checker_signal),
1360
1851
dbus.String(command))
1362
return Client.checker_callback(self, pid, condition, command,
1365
1854
def start_checker(self, *args, **kwargs):
1366
1855
old_checker_pid = getattr(self.checker, "pid", None)
1367
1856
r = Client.start_checker(self, *args, **kwargs)
1685
2190
class ClientHandler(socketserver.BaseRequestHandler, object):
1686
2191
"""A class to handle client connections.
1688
2193
Instantiated once for each connection to handle it.
1689
2194
Note: This will run in its own forked process."""
1691
2196
def handle(self):
1692
2197
with contextlib.closing(self.server.child_pipe) as child_pipe:
1693
2198
logger.info("TCP connection from: %s",
1694
2199
str(self.client_address))
1695
2200
logger.debug("Pipe FD: %d",
1696
2201
self.server.child_pipe.fileno())
1698
session = gnutls.connection.ClientSession(
1699
self.request, gnutls.connection .X509Credentials())
1701
# Note: gnutls.connection.X509Credentials is really a
1702
# generic GnuTLS certificate credentials object so long as
1703
# no X.509 keys are added to it. Therefore, we can use it
1704
# here despite using OpenPGP certificates.
1706
#priority = ':'.join(("NONE", "+VERS-TLS1.1",
1707
# "+AES-256-CBC", "+SHA1",
1708
# "+COMP-NULL", "+CTYPE-OPENPGP",
2203
session = gnutls.ClientSession(self.request)
2205
# priority = ':'.join(("NONE", "+VERS-TLS1.1",
2206
# "+AES-256-CBC", "+SHA1",
2207
# "+COMP-NULL", "+CTYPE-OPENPGP",
1710
2209
# Use a fallback default, since this MUST be set.
1711
2210
priority = self.server.gnutls_priority
1712
2211
if priority is None:
1713
2212
priority = "NORMAL"
1714
gnutls.library.functions.gnutls_priority_set_direct(
1715
session._c_object, priority, None)
2213
gnutls.priority_set_direct(session._c_object,
2214
priority.encode("utf-8"),
1717
2217
# Start communication using the Mandos protocol
1718
2218
# Get protocol number
1719
2219
line = self.request.makefile().readline()
1806
2305
delay -= time2 - time
1809
while sent_size < len(client.secret):
1811
sent = session.send(client.secret[sent_size:])
1812
except gnutls.errors.GNUTLSError as error:
1813
logger.warning("gnutls send failed",
1816
logger.debug("Sent: %d, remaining: %d", sent,
1817
len(client.secret) - (sent_size
2308
session.send(client.secret)
2309
except gnutls.Error as error:
2310
logger.warning("gnutls send failed",
1821
2314
logger.info("Sending secret to %s", client.name)
1822
2315
# bump the timeout using extended_timeout
1823
2316
client.bump_timeout(client.extended_timeout)
1824
2317
if self.server.use_dbus:
1825
2318
# Emit D-Bus signal
1826
2319
client.GotSecret()
1829
2322
if approval_required:
1830
2323
client.approvals_pending -= 1
1833
except gnutls.errors.GNUTLSError as error:
2326
except gnutls.Error as error:
1834
2327
logger.warning("GnuTLS bye failed",
1835
2328
exc_info=error)
1838
2331
def peer_certificate(session):
1839
2332
"Return the peer's OpenPGP certificate as a bytestring"
1840
2333
# If not an OpenPGP certificate...
1841
if (gnutls.library.functions.gnutls_certificate_type_get(
1843
!= gnutls.library.constants.GNUTLS_CRT_OPENPGP):
1844
# ...do the normal thing
1845
return session.peer_certificate
2334
if (gnutls.certificate_type_get(session._c_object)
2335
!= gnutls.CRT_OPENPGP):
2336
# ...return invalid data
1846
2338
list_size = ctypes.c_uint(1)
1847
cert_list = (gnutls.library.functions
1848
.gnutls_certificate_get_peers
2339
cert_list = (gnutls.certificate_get_peers
1849
2340
(session._c_object, ctypes.byref(list_size)))
1850
2341
if not bool(cert_list) and list_size.value != 0:
1851
raise gnutls.errors.GNUTLSError("error getting peer"
2342
raise gnutls.Error("error getting peer certificate")
1853
2343
if list_size.value == 0:
1855
2345
cert = cert_list[0]
1856
2346
return ctypes.string_at(cert.data, cert.size)
1859
2349
def fingerprint(openpgp):
1860
2350
"Convert an OpenPGP bytestring to a hexdigit fingerprint"
1861
2351
# New GnuTLS "datum" with the OpenPGP public key
1862
datum = gnutls.library.types.gnutls_datum_t(
2352
datum = gnutls.datum_t(
1863
2353
ctypes.cast(ctypes.c_char_p(openpgp),
1864
2354
ctypes.POINTER(ctypes.c_ubyte)),
1865
2355
ctypes.c_uint(len(openpgp)))
1866
2356
# New empty GnuTLS certificate
1867
crt = gnutls.library.types.gnutls_openpgp_crt_t()
1868
gnutls.library.functions.gnutls_openpgp_crt_init(
2357
crt = gnutls.openpgp_crt_t()
2358
gnutls.openpgp_crt_init(ctypes.byref(crt))
1870
2359
# Import the OpenPGP public key into the certificate
1871
gnutls.library.functions.gnutls_openpgp_crt_import(
1872
crt, ctypes.byref(datum),
1873
gnutls.library.constants.GNUTLS_OPENPGP_FMT_RAW)
2360
gnutls.openpgp_crt_import(crt, ctypes.byref(datum),
2361
gnutls.OPENPGP_FMT_RAW)
1874
2362
# Verify the self signature in the key
1875
2363
crtverify = ctypes.c_uint()
1876
gnutls.library.functions.gnutls_openpgp_crt_verify_self(
1877
crt, 0, ctypes.byref(crtverify))
2364
gnutls.openpgp_crt_verify_self(crt, 0,
2365
ctypes.byref(crtverify))
1878
2366
if crtverify.value != 0:
1879
gnutls.library.functions.gnutls_openpgp_crt_deinit(crt)
1880
raise gnutls.errors.CertificateSecurityError(
2367
gnutls.openpgp_crt_deinit(crt)
2368
raise gnutls.CertificateSecurityError("Verify failed")
1882
2369
# New buffer for the fingerprint
1883
2370
buf = ctypes.create_string_buffer(20)
1884
2371
buf_len = ctypes.c_size_t()
1885
2372
# Get the fingerprint from the certificate into the buffer
1886
gnutls.library.functions.gnutls_openpgp_crt_get_fingerprint(
1887
crt, ctypes.byref(buf), ctypes.byref(buf_len))
2373
gnutls.openpgp_crt_get_fingerprint(crt, ctypes.byref(buf),
2374
ctypes.byref(buf_len))
1888
2375
# Deinit the certificate
1889
gnutls.library.functions.gnutls_openpgp_crt_deinit(crt)
2376
gnutls.openpgp_crt_deinit(crt)
1890
2377
# Convert the buffer to a Python bytestring
1891
2378
fpr = ctypes.string_at(buf, buf_len.value)
1892
2379
# Convert the bytestring to hexadecimal notation
1980
2468
# socket_wrapper(), if socketfd was set.
1981
2469
socketserver.TCPServer.__init__(self, server_address,
1982
2470
RequestHandlerClass)
1984
2472
def server_bind(self):
1985
2473
"""This overrides the normal server_bind() function
1986
2474
to bind to an interface if one was specified, and also NOT to
1987
2475
bind to an address or port if they were not specified."""
2476
global SO_BINDTODEVICE
1988
2477
if self.interface is not None:
1989
2478
if SO_BINDTODEVICE is None:
1990
logger.error("SO_BINDTODEVICE does not exist;"
1991
" cannot bind to interface %s",
1995
self.socket.setsockopt(
1996
socket.SOL_SOCKET, SO_BINDTODEVICE,
1997
(self.interface + "\0").encode("utf-8"))
1998
except socket.error as error:
1999
if error.errno == errno.EPERM:
2000
logger.error("No permission to bind to"
2001
" interface %s", self.interface)
2002
elif error.errno == errno.ENOPROTOOPT:
2003
logger.error("SO_BINDTODEVICE not available;"
2004
" cannot bind to interface %s",
2006
elif error.errno == errno.ENODEV:
2007
logger.error("Interface %s does not exist,"
2008
" cannot bind", self.interface)
2479
# Fall back to a hard-coded value which seems to be
2481
logger.warning("SO_BINDTODEVICE not found, trying 25")
2482
SO_BINDTODEVICE = 25
2484
self.socket.setsockopt(
2485
socket.SOL_SOCKET, SO_BINDTODEVICE,
2486
(self.interface + "\0").encode("utf-8"))
2487
except socket.error as error:
2488
if error.errno == errno.EPERM:
2489
logger.error("No permission to bind to"
2490
" interface %s", self.interface)
2491
elif error.errno == errno.ENOPROTOOPT:
2492
logger.error("SO_BINDTODEVICE not available;"
2493
" cannot bind to interface %s",
2495
elif error.errno == errno.ENODEV:
2496
logger.error("Interface %s does not exist,"
2497
" cannot bind", self.interface)
2011
2500
# Only bind(2) the socket if we really need to.
2012
2501
if self.server_address[0] or self.server_address[1]:
2013
2502
if not self.server_address[0]:
2014
2503
if self.address_family == socket.AF_INET6:
2015
any_address = "::" # in6addr_any
2504
any_address = "::" # in6addr_any
2017
any_address = "0.0.0.0" # INADDR_ANY
2506
any_address = "0.0.0.0" # INADDR_ANY
2018
2507
self.server_address = (any_address,
2019
2508
self.server_address[1])
2020
2509
elif not self.server_address[1]:
2572
3064
protocol = avahi.PROTO_INET6 if use_ipv6 else avahi.PROTO_INET
2573
3065
service = AvahiServiceToSyslog(
2574
name = server_settings["servicename"],
2575
servicetype = "_mandos._tcp",
2576
protocol = protocol,
3066
name=server_settings["servicename"],
3067
servicetype="_mandos._tcp",
2578
3070
if server_settings["interface"]:
2579
3071
service.interface = if_nametoindex(
2580
3072
server_settings["interface"].encode("utf-8"))
2582
3074
global multiprocessing_manager
2583
3075
multiprocessing_manager = multiprocessing.Manager()
2585
3077
client_class = Client
2587
client_class = functools.partial(ClientDBus, bus = bus)
3079
client_class = functools.partial(ClientDBus, bus=bus)
2589
3081
client_settings = Client.config_parser(client_config)
2590
3082
old_client_settings = {}
2591
3083
clients_data = {}
2593
3085
# This is used to redirect stdout and stderr for checker processes
2595
wnull = open(os.devnull, "w") # A writable /dev/null
3087
wnull = open(os.devnull, "w") # A writable /dev/null
2596
3088
# Only used if server is running in foreground but not in debug
2598
3090
if debug or not foreground:
2601
3093
# Get client data and settings from last running state.
2602
3094
if server_settings["restore"]:
2604
3096
with open(stored_state_path, "rb") as stored_state:
2605
clients_data, old_client_settings = pickle.load(
3097
if sys.version_info.major == 2:
3098
clients_data, old_client_settings = pickle.load(
3101
bytes_clients_data, bytes_old_client_settings = (
3102
pickle.load(stored_state, encoding="bytes"))
3103
# Fix bytes to strings
3106
clients_data = {(key.decode("utf-8")
3107
if isinstance(key, bytes)
3110
bytes_clients_data.items()}
3111
del bytes_clients_data
3112
for key in clients_data:
3113
value = {(k.decode("utf-8")
3114
if isinstance(k, bytes) else k): v
3116
clients_data[key].items()}
3117
clients_data[key] = value
3119
value["client_structure"] = [
3121
if isinstance(s, bytes)
3123
value["client_structure"]]
3125
for k in ("name", "host"):
3126
if isinstance(value[k], bytes):
3127
value[k] = value[k].decode("utf-8")
3128
# old_client_settings
3130
old_client_settings = {
3131
(key.decode("utf-8")
3132
if isinstance(key, bytes)
3135
bytes_old_client_settings.items()}
3136
del bytes_old_client_settings
3138
for value in old_client_settings.values():
3139
if isinstance(value["host"], bytes):
3140
value["host"] = (value["host"]
2607
3142
os.remove(stored_state_path)
2608
3143
except IOError as e:
2609
3144
if e.errno == errno.ENOENT:
2687
3222
for client_name in (set(client_settings)
2688
3223
- set(old_client_settings)):
2689
3224
clients_data[client_name] = client_settings[client_name]
2691
3226
# Create all client objects
2692
3227
for client_name, client in clients_data.items():
2693
3228
tcp_server.clients[client_name] = client_class(
2696
server_settings = server_settings)
3231
server_settings=server_settings)
2698
3233
if not tcp_server.clients:
2699
3234
logger.warning("No clients defined")
2701
3236
if not foreground:
2702
3237
if pidfile is not None:
2706
pidfile.write("{}\n".format(pid).encode("utf-8"))
3241
print(pid, file=pidfile)
2707
3242
except IOError:
2708
3243
logger.error("Could not write to file %r with PID %d",
2709
3244
pidfilename, pid)
2711
3246
del pidfilename
2713
signal.signal(signal.SIGHUP, lambda signum, frame: sys.exit())
2714
signal.signal(signal.SIGTERM, lambda signum, frame: sys.exit())
3248
for termsig in (signal.SIGHUP, signal.SIGTERM):
3249
GLib.unix_signal_add(GLib.PRIORITY_HIGH, termsig,
3250
lambda: main_loop.quit() and False)
2718
3254
@alternate_dbus_interfaces(
2719
{ "se.recompile.Mandos": "se.bsnet.fukt.Mandos" })
2720
class MandosDBusService(DBusObjectWithProperties):
3255
{"se.recompile.Mandos": "se.bsnet.fukt.Mandos"})
3256
class MandosDBusService(DBusObjectWithObjectManager):
2721
3257
"""A D-Bus proxy object"""
2723
3259
def __init__(self):
2724
3260
dbus.service.Object.__init__(self, bus, "/")
2726
3262
_interface = "se.recompile.Mandos"
2728
@dbus_interface_annotations(_interface)
2731
"org.freedesktop.DBus.Property.EmitsChangedSignal":
2734
3264
@dbus.service.signal(_interface, signature="o")
2735
3265
def ClientAdded(self, objpath):
2739
3269
@dbus.service.signal(_interface, signature="ss")
2740
3270
def ClientNotFound(self, fingerprint, address):
3274
@dbus_annotations({"org.freedesktop.DBus.Deprecated":
2744
3276
@dbus.service.signal(_interface, signature="os")
2745
3277
def ClientRemoved(self, objpath, name):
3281
@dbus_annotations({"org.freedesktop.DBus.Deprecated":
2749
3283
@dbus.service.method(_interface, out_signature="ao")
2750
3284
def GetAllClients(self):
2752
3286
return dbus.Array(c.dbus_object_path for c in
2753
tcp_server.clients.itervalues())
3287
tcp_server.clients.values())
3289
@dbus_annotations({"org.freedesktop.DBus.Deprecated":
2755
3291
@dbus.service.method(_interface,
2756
3292
out_signature="a{oa{sv}}")
2757
3293
def GetAllClientsWithProperties(self):
2759
3295
return dbus.Dictionary(
2760
{ c.dbus_object_path: c.GetAll("")
2761
for c in tcp_server.clients.itervalues() },
3296
{c.dbus_object_path: c.GetAll(
3297
"se.recompile.Mandos.Client")
3298
for c in tcp_server.clients.values()},
2762
3299
signature="oa{sv}")
2764
3301
@dbus.service.method(_interface, in_signature="o")
2765
3302
def RemoveClient(self, object_path):
2767
for c in tcp_server.clients.itervalues():
3304
for c in tcp_server.clients.values():
2768
3305
if c.dbus_object_path == object_path:
2769
3306
del tcp_server.clients[c.name]
2770
3307
c.remove_from_connection()
2771
# Don't signal anything except ClientRemoved
3308
# Don't signal the disabling
2772
3309
c.disable(quiet=True)
2774
self.ClientRemoved(object_path, c.name)
3310
# Emit D-Bus signal for removal
3311
self.client_removed_signal(c)
2776
3313
raise KeyError(object_path)
3317
@dbus.service.method(dbus.OBJECT_MANAGER_IFACE,
3318
out_signature="a{oa{sa{sv}}}")
3319
def GetManagedObjects(self):
3321
return dbus.Dictionary(
3322
{client.dbus_object_path:
3324
{interface: client.GetAll(interface)
3326
client._get_all_interface_names()})
3327
for client in tcp_server.clients.values()})
3329
def client_added_signal(self, client):
3330
"""Send the new standard signal and the old signal"""
3332
# New standard signal
3333
self.InterfacesAdded(
3334
client.dbus_object_path,
3336
{interface: client.GetAll(interface)
3338
client._get_all_interface_names()}))
3340
self.ClientAdded(client.dbus_object_path)
3342
def client_removed_signal(self, client):
3343
"""Send the new standard signal and the old signal"""
3345
# New standard signal
3346
self.InterfacesRemoved(
3347
client.dbus_object_path,
3348
client._get_all_interface_names())
3350
self.ClientRemoved(client.dbus_object_path,
2780
3353
mandos_dbus_service = MandosDBusService()
3355
# Save modules to variables to exempt the modules from being
3356
# unloaded before the function registered with atexit() is run.
3357
mp = multiprocessing
2783
3361
"Cleanup function; run on exit"
2785
3363
service.cleanup()
2787
multiprocessing.active_children()
3365
mp.active_children()
2789
3367
if not (tcp_server.clients or client_settings):
2792
3370
# Store client before exiting. Secrets are encrypted with key
2793
3371
# based on what config file has. If config file is
2794
3372
# removed/edited, old secret will thus be unrecovable.
2796
3374
with PGPEngine() as pgp:
2797
for client in tcp_server.clients.itervalues():
3375
for client in tcp_server.clients.values():
2798
3376
key = client_settings[client.name]["secret"]
2799
3377
client.encrypted_secret = pgp.encrypt(client.secret,
2801
3379
client_dict = {}
2803
3381
# A list of attributes that can not be pickled
2805
exclude = { "bus", "changedstate", "secret",
2806
"checker", "server_settings" }
3383
exclude = {"bus", "changedstate", "secret",
3384
"checker", "server_settings"}
2807
3385
for name, typ in inspect.getmembers(dbus.service
2809
3387
exclude.add(name)
2811
3389
client_dict["encrypted_secret"] = (client
2812
3390
.encrypted_secret)
2813
3391
for attr in client.client_structure:
2814
3392
if attr not in exclude:
2815
3393
client_dict[attr] = getattr(client, attr)
2817
3395
clients[client.name] = client_dict
2818
3396
del client_settings[client.name]["secret"]
2821
3399
with tempfile.NamedTemporaryFile(