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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)]
738
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,
748
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
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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 = (
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_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
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# Create the global "gnutls" object, simulating a module
769
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def call_pipe(connection, # : multiprocessing.Connection
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func, *args, **kwargs):
771
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"""This function is meant to be called by multiprocessing.Process
773
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This function runs func(*args, **kwargs), and writes the resulting
774
431
return value on the provided multiprocessing.Connection.
776
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connection.send(func(*args, **kwargs))
777
434
connection.close()
780
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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
653
# Read return code from connection (see 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
883
for cls in self.__class__.__mro__
1231
884
for name, athing in
1232
885
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
887
def _get_dbus_property(self, interface_name, property_name):
1306
888
"""Returns a bound method if one exists which is a D-Bus
1307
889
property with the specified name and interface.
1422
994
if prop._dbus_interface
1423
995
== if_tag.getAttribute("name")):
1424
996
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)
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)
1441
1026
# Add the names to the return values for the
1442
1027
# "org.freedesktop.DBus.Properties" methods
1443
1028
if (if_tag.getAttribute("name")
1462
1047
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
1050
def datetime_to_dbus(dt, variant_level=0):
1537
1051
"""Convert a UTC datetime.datetime() to a D-Bus type."""
1539
return dbus.String("", variant_level=variant_level)
1053
return dbus.String("", variant_level = variant_level)
1540
1054
return dbus.String(dt.isoformat(), variant_level=variant_level)
2190
1685
class ClientHandler(socketserver.BaseRequestHandler, object):
2191
1686
"""A class to handle client connections.
2193
1688
Instantiated once for each connection to handle it.
2194
1689
Note: This will run in its own forked process."""
2196
1691
def handle(self):
2197
1692
with contextlib.closing(self.server.child_pipe) as child_pipe:
2198
1693
logger.info("TCP connection from: %s",
2199
1694
str(self.client_address))
2200
1695
logger.debug("Pipe FD: %d",
2201
1696
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",
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",
2209
1710
# Use a fallback default, since this MUST be set.
2210
1711
priority = self.server.gnutls_priority
2211
1712
if priority is None:
2212
1713
priority = "NORMAL"
2213
gnutls.priority_set_direct(session._c_object,
2214
priority.encode("utf-8"),
1714
gnutls.library.functions.gnutls_priority_set_direct(
1715
session._c_object, priority, None)
2217
1717
# Start communication using the Mandos protocol
2218
1718
# Get protocol number
2219
1719
line = self.request.makefile().readline()
2305
1806
delay -= time2 - time
2308
session.send(client.secret)
2309
except gnutls.Error as error:
2310
logger.warning("gnutls send failed",
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
2314
1821
logger.info("Sending secret to %s", client.name)
2315
1822
# bump the timeout using extended_timeout
2316
1823
client.bump_timeout(client.extended_timeout)
2317
1824
if self.server.use_dbus:
2318
1825
# Emit D-Bus signal
2319
1826
client.GotSecret()
2322
1829
if approval_required:
2323
1830
client.approvals_pending -= 1
2326
except gnutls.Error as error:
1833
except gnutls.errors.GNUTLSError as error:
2327
1834
logger.warning("GnuTLS bye failed",
2328
1835
exc_info=error)
2331
1838
def peer_certificate(session):
2332
1839
"Return the peer's OpenPGP certificate as a bytestring"
2333
1840
# If not an OpenPGP certificate...
2334
if (gnutls.certificate_type_get(session._c_object)
2335
!= gnutls.CRT_OPENPGP):
2336
# ...return invalid data
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
2338
1846
list_size = ctypes.c_uint(1)
2339
cert_list = (gnutls.certificate_get_peers
1847
cert_list = (gnutls.library.functions
1848
.gnutls_certificate_get_peers
2340
1849
(session._c_object, ctypes.byref(list_size)))
2341
1850
if not bool(cert_list) and list_size.value != 0:
2342
raise gnutls.Error("error getting peer certificate")
1851
raise gnutls.errors.GNUTLSError("error getting peer"
2343
1853
if list_size.value == 0:
2345
1855
cert = cert_list[0]
2346
1856
return ctypes.string_at(cert.data, cert.size)
2349
1859
def fingerprint(openpgp):
2350
1860
"Convert an OpenPGP bytestring to a hexdigit fingerprint"
2351
1861
# New GnuTLS "datum" with the OpenPGP public key
2352
datum = gnutls.datum_t(
1862
datum = gnutls.library.types.gnutls_datum_t(
2353
1863
ctypes.cast(ctypes.c_char_p(openpgp),
2354
1864
ctypes.POINTER(ctypes.c_ubyte)),
2355
1865
ctypes.c_uint(len(openpgp)))
2356
1866
# New empty GnuTLS certificate
2357
crt = gnutls.openpgp_crt_t()
2358
gnutls.openpgp_crt_init(ctypes.byref(crt))
1867
crt = gnutls.library.types.gnutls_openpgp_crt_t()
1868
gnutls.library.functions.gnutls_openpgp_crt_init(
2359
1870
# Import the OpenPGP public key into the certificate
2360
gnutls.openpgp_crt_import(crt, ctypes.byref(datum),
2361
gnutls.OPENPGP_FMT_RAW)
1871
gnutls.library.functions.gnutls_openpgp_crt_import(
1872
crt, ctypes.byref(datum),
1873
gnutls.library.constants.GNUTLS_OPENPGP_FMT_RAW)
2362
1874
# Verify the self signature in the key
2363
1875
crtverify = ctypes.c_uint()
2364
gnutls.openpgp_crt_verify_self(crt, 0,
2365
ctypes.byref(crtverify))
1876
gnutls.library.functions.gnutls_openpgp_crt_verify_self(
1877
crt, 0, ctypes.byref(crtverify))
2366
1878
if crtverify.value != 0:
2367
gnutls.openpgp_crt_deinit(crt)
2368
raise gnutls.CertificateSecurityError(code
1879
gnutls.library.functions.gnutls_openpgp_crt_deinit(crt)
1880
raise gnutls.errors.CertificateSecurityError(
2370
1882
# New buffer for the fingerprint
2371
1883
buf = ctypes.create_string_buffer(20)
2372
1884
buf_len = ctypes.c_size_t()
2373
1885
# Get the fingerprint from the certificate into the buffer
2374
gnutls.openpgp_crt_get_fingerprint(crt, ctypes.byref(buf),
2375
ctypes.byref(buf_len))
1886
gnutls.library.functions.gnutls_openpgp_crt_get_fingerprint(
1887
crt, ctypes.byref(buf), ctypes.byref(buf_len))
2376
1888
# Deinit the certificate
2377
gnutls.openpgp_crt_deinit(crt)
1889
gnutls.library.functions.gnutls_openpgp_crt_deinit(crt)
2378
1890
# Convert the buffer to a Python bytestring
2379
1891
fpr = ctypes.string_at(buf, buf_len.value)
2380
1892
# Convert the bytestring to hexadecimal notation
2469
1980
# socket_wrapper(), if socketfd was set.
2470
1981
socketserver.TCPServer.__init__(self, server_address,
2471
1982
RequestHandlerClass)
2473
1984
def server_bind(self):
2474
1985
"""This overrides the normal server_bind() function
2475
1986
to bind to an interface if one was specified, and also NOT to
2476
1987
bind to an address or port if they were not specified."""
2477
global SO_BINDTODEVICE
2478
1988
if self.interface is not None:
2479
1989
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)
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)
2501
2011
# Only bind(2) the socket if we really need to.
2502
2012
if self.server_address[0] or self.server_address[1]:
2503
2013
if not self.server_address[0]:
2504
2014
if self.address_family == socket.AF_INET6:
2505
any_address = "::" # in6addr_any
2015
any_address = "::" # in6addr_any
2507
any_address = "0.0.0.0" # INADDR_ANY
2017
any_address = "0.0.0.0" # INADDR_ANY
2508
2018
self.server_address = (any_address,
2509
2019
self.server_address[1])
2510
2020
elif not self.server_address[1]:
3065
2572
protocol = avahi.PROTO_INET6 if use_ipv6 else avahi.PROTO_INET
3066
2573
service = AvahiServiceToSyslog(
3067
name=server_settings["servicename"],
3068
servicetype="_mandos._tcp",
2574
name = server_settings["servicename"],
2575
servicetype = "_mandos._tcp",
2576
protocol = protocol,
3071
2578
if server_settings["interface"]:
3072
2579
service.interface = if_nametoindex(
3073
2580
server_settings["interface"].encode("utf-8"))
3075
2582
global multiprocessing_manager
3076
2583
multiprocessing_manager = multiprocessing.Manager()
3078
2585
client_class = Client
3080
client_class = functools.partial(ClientDBus, bus=bus)
2587
client_class = functools.partial(ClientDBus, bus = bus)
3082
2589
client_settings = Client.config_parser(client_config)
3083
2590
old_client_settings = {}
3084
2591
clients_data = {}
3086
2593
# This is used to redirect stdout and stderr for checker processes
3088
wnull = open(os.devnull, "w") # A writable /dev/null
2595
wnull = open(os.devnull, "w") # A writable /dev/null
3089
2596
# Only used if server is running in foreground but not in debug
3091
2598
if debug or not foreground:
3094
2601
# Get client data and settings from last running state.
3095
2602
if server_settings["restore"]:
3097
2604
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"]
2605
clients_data, old_client_settings = pickle.load(
3143
2607
os.remove(stored_state_path)
3144
2608
except IOError as e:
3145
2609
if e.errno == errno.ENOENT:
3223
2687
for client_name in (set(client_settings)
3224
2688
- set(old_client_settings)):
3225
2689
clients_data[client_name] = client_settings[client_name]
3227
2691
# Create all client objects
3228
2692
for client_name, client in clients_data.items():
3229
2693
tcp_server.clients[client_name] = client_class(
3232
server_settings=server_settings)
2696
server_settings = server_settings)
3234
2698
if not tcp_server.clients:
3235
2699
logger.warning("No clients defined")
3237
2701
if not foreground:
3238
2702
if pidfile is not None:
3242
print(pid, file=pidfile)
2706
pidfile.write("{}\n".format(pid).encode("utf-8"))
3243
2707
except IOError:
3244
2708
logger.error("Could not write to file %r with PID %d",
3245
2709
pidfilename, pid)
3247
2711
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)
2713
signal.signal(signal.SIGHUP, lambda signum, frame: sys.exit())
2714
signal.signal(signal.SIGTERM, lambda signum, frame: sys.exit())
3255
2718
@alternate_dbus_interfaces(
3256
{"se.recompile.Mandos": "se.bsnet.fukt.Mandos"})
3257
class MandosDBusService(DBusObjectWithObjectManager):
2719
{ "se.recompile.Mandos": "se.bsnet.fukt.Mandos" })
2720
class MandosDBusService(DBusObjectWithProperties):
3258
2721
"""A D-Bus proxy object"""
3260
2723
def __init__(self):
3261
2724
dbus.service.Object.__init__(self, bus, "/")
3263
2726
_interface = "se.recompile.Mandos"
2728
@dbus_interface_annotations(_interface)
2731
"org.freedesktop.DBus.Property.EmitsChangedSignal":
3265
2734
@dbus.service.signal(_interface, signature="o")
3266
2735
def ClientAdded(self, objpath):
3270
2739
@dbus.service.signal(_interface, signature="ss")
3271
2740
def ClientNotFound(self, fingerprint, address):
3275
@dbus_annotations({"org.freedesktop.DBus.Deprecated":
3277
2744
@dbus.service.signal(_interface, signature="os")
3278
2745
def ClientRemoved(self, objpath, name):
3282
@dbus_annotations({"org.freedesktop.DBus.Deprecated":
3284
2749
@dbus.service.method(_interface, out_signature="ao")
3285
2750
def GetAllClients(self):
3287
2752
return dbus.Array(c.dbus_object_path for c in
3288
tcp_server.clients.values())
3290
@dbus_annotations({"org.freedesktop.DBus.Deprecated":
2753
tcp_server.clients.itervalues())
3292
2755
@dbus.service.method(_interface,
3293
2756
out_signature="a{oa{sv}}")
3294
2757
def GetAllClientsWithProperties(self):
3296
2759
return dbus.Dictionary(
3297
{c.dbus_object_path: c.GetAll(
3298
"se.recompile.Mandos.Client")
3299
for c in tcp_server.clients.values()},
2760
{ c.dbus_object_path: c.GetAll("")
2761
for c in tcp_server.clients.itervalues() },
3300
2762
signature="oa{sv}")
3302
2764
@dbus.service.method(_interface, in_signature="o")
3303
2765
def RemoveClient(self, object_path):
3305
for c in tcp_server.clients.values():
2767
for c in tcp_server.clients.itervalues():
3306
2768
if c.dbus_object_path == object_path:
3307
2769
del tcp_server.clients[c.name]
3308
2770
c.remove_from_connection()
3309
# Don't signal the disabling
2771
# Don't signal anything except ClientRemoved
3310
2772
c.disable(quiet=True)
3311
# Emit D-Bus signal for removal
3312
self.client_removed_signal(c)
2774
self.ClientRemoved(object_path, c.name)
3314
2776
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
2780
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
2783
"Cleanup function; run on exit"
3364
2785
service.cleanup()
3366
mp.active_children()
2787
multiprocessing.active_children()
3368
2789
if not (tcp_server.clients or client_settings):
3371
2792
# Store client before exiting. Secrets are encrypted with key
3372
2793
# based on what config file has. If config file is
3373
2794
# removed/edited, old secret will thus be unrecovable.
3375
2796
with PGPEngine() as pgp:
3376
for client in tcp_server.clients.values():
2797
for client in tcp_server.clients.itervalues():
3377
2798
key = client_settings[client.name]["secret"]
3378
2799
client.encrypted_secret = pgp.encrypt(client.secret,
3380
2801
client_dict = {}
3382
2803
# A list of attributes that can not be pickled
3384
exclude = {"bus", "changedstate", "secret",
3385
"checker", "server_settings"}
2805
exclude = { "bus", "changedstate", "secret",
2806
"checker", "server_settings" }
3386
2807
for name, typ in inspect.getmembers(dbus.service
3388
2809
exclude.add(name)
3390
2811
client_dict["encrypted_secret"] = (client
3391
2812
.encrypted_secret)
3392
2813
for attr in client.client_structure:
3393
2814
if attr not in exclude:
3394
2815
client_dict[attr] = getattr(client, attr)
3396
2817
clients[client.name] = client_dict
3397
2818
del client_settings[client.name]["secret"]
3400
2821
with tempfile.NamedTemporaryFile(