refactoring: renamed sat package to libervia.backend

sat/plugins/plugin_xep_0380.py

@@ -1,102 +0,0 @@
-#!/usr/bin/env python3
-
-
-# SAT plugin for Explicit Message Encryption
-# Copyright (C) 2009-2021 Jérôme Poisson (goffi@goffi.org)
-
-# This program is free software: you can redistribute it and/or modify
-# it under the terms of the GNU Affero General Public License as published by
-# the Free Software Foundation, either version 3 of the License, or
-# (at your option) any later version.
-
-# This program is distributed in the hope that it will be useful,
-# but WITHOUT ANY WARRANTY; without even the implied warranty of
-# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
-# GNU Affero General Public License for more details.
-
-# You should have received a copy of the GNU Affero General Public License
-# along with this program.  If not, see <http://www.gnu.org/licenses/>.
-
-from sat.core.i18n import _, D_
-from sat.core.constants import Const as C
-from sat.core.log import getLogger
-from twisted.words.protocols.jabber import jid
-
-log = getLogger(__name__)
-
-PLUGIN_INFO = {
-    C.PI_NAME: "Explicit Message Encryption",
-    C.PI_IMPORT_NAME: "XEP-0380",
-    C.PI_TYPE: "SEC",
-    C.PI_PROTOCOLS: ["XEP-0380"],
-    C.PI_DEPENDENCIES: [],
-    C.PI_MAIN: "XEP_0380",
-    C.PI_HANDLER: "no",
-    C.PI_DESCRIPTION: _("""Implementation of Explicit Message Encryption"""),
-}
-
-NS_EME = "urn:xmpp:eme:0"
-KNOWN_NAMESPACES = {
-    "urn:xmpp:otr:0": "OTR",
-    "jabber:x:encrypted": "Legacy OpenPGP",
-    "urn:xmpp:openpgp:0": "OpenPGP for XMPP",
-}
-
-
-class XEP_0380(object):
-
-    def __init__(self, host):
-        self.host = host
-        host.trigger.add("sendMessage", self._send_message_trigger)
-        host.trigger.add("message_received", self._message_received_trigger, priority=100)
-        host.register_namespace("eme", NS_EME)
-
-    def _add_eme_element(self, mess_data, namespace, name):
-        message_elt = mess_data['xml']
-        encryption_elt = message_elt.addElement((NS_EME, 'encryption'))
-        encryption_elt['namespace'] = namespace
-        if name is not None:
-            encryption_elt['name'] = name
-        return mess_data
-
-    def _send_message_trigger(self, client, mess_data, __, post_xml_treatments):
-        encryption = mess_data.get(C.MESS_KEY_ENCRYPTION)
-        if encryption is not None:
-            namespace = encryption['plugin'].namespace
-            if namespace not in KNOWN_NAMESPACES:
-                name = encryption['plugin'].name
-            else:
-                name = None
-            post_xml_treatments.addCallback(
-                self._add_eme_element, namespace=namespace, name=name)
-        return True
-
-    def _message_received_trigger(self, client, message_elt, post_treat):
-        try:
-            encryption_elt = next(message_elt.elements(NS_EME, 'encryption'))
-        except StopIteration:
-            return True
-
-        namespace = encryption_elt['namespace']
-        if namespace in client.encryption.get_namespaces():
-            # message is encrypted and we can decrypt it
-            return True
-
-        name = KNOWN_NAMESPACES.get(namespace, encryption_elt.getAttribute("name"))
-
-        # at this point, message is encrypted but we know that we can't decrypt it,
-        # we need to notify the user
-        sender_s = message_elt['from']
-        to_jid = jid.JID(message_elt['from'])
-        algorithm = "{} [{}]".format(name, namespace) if name else namespace
-        log.warning(
-            _("Message from {sender} is encrypted with {algorithm} and we can't "
-              "decrypt it.".format(sender=message_elt['from'], algorithm=algorithm)))
-
-        user_msg = D_(
-            "User {sender} sent you an encrypted message (encrypted with {algorithm}), "
-            "and we can't decrypt it.").format(sender=sender_s, algorithm=algorithm)
-
-        extra = {C.MESS_EXTRA_INFO: C.EXTRA_INFO_DECR_ERR}
-        client.feedback(to_jid, user_msg, extra)
-        return False