Mercurial > libervia-backend
view sat/plugins/plugin_xep_0380.py @ 4001:32d714a8ea51
plugin XEP-0045: dot not wait for MAM retrieval to be completed:
in `_join_MAM`, `room.fully_joined` is called before retrieving the MAM archive, as the
process can be very long, and is not necessary to have the room working (message can be
received after being in the room, and added out of order). This avoid blocking the `join`
workflow for an extended time.
Some renaming and coroutine integrations.
author | Goffi <goffi@goffi.org> |
---|---|
date | Fri, 10 Mar 2023 17:22:41 +0100 |
parents | be6d91572633 |
children | 524856bd7b19 |
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#!/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._sendMessageTrigger) host.trigger.add("messageReceived", self._messageReceivedTrigger, priority=100) host.registerNamespace("eme", NS_EME) def _addEMEElement(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 _sendMessageTrigger(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._addEMEElement, namespace=namespace, name=name) return True def _messageReceivedTrigger(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.getNamespaces(): # 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