Mercurial > libervia-backend
view sat/plugins/plugin_xep_0380.py @ 2845:42380a4f6433
quick frontend (app): new synchronisation mechanism:
on some frontend (notably on mobiles) frontend can be paused and lose synchronisation with backend, this can also happen if backend restart a connexion without resuming using stream management. To manage that, QuickApp now has a sync attribute which is True when the backend is in sync with frontend.
When synchronisation has been lost and is possible again, all widget will have their "resync" method called, which can be used to do necessary calls to update the status.
It's the responsability of each widget to then reset the "sync" attribute, once everything has been resynchronised.
author | Goffi <goffi@goffi.org> |
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date | Sat, 09 Mar 2019 16:33:31 +0100 |
parents | 607cfc79e40f |
children | ab2696e34d29 |
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#!/usr/bin/env python2 # -*- coding: utf-8 -*- # SAT plugin for Explicit Message Encryption # Copyright (C) 2009-2019 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: u"Explicit Message Encryption", C.PI_IMPORT_NAME: u"XEP-0380", C.PI_TYPE: u"SEC", C.PI_PROTOCOLS: [u"XEP-0380"], C.PI_DEPENDENCIES: [], C.PI_MAIN: u"XEP_0380", C.PI_HANDLER: u"no", C.PI_DESCRIPTION: _(u"""Implementation of Explicit Message Encryption"""), } NS_EME = u"urn:xmpp:eme:0" KNOWN_NAMESPACES = { u"urn:xmpp:otr:0": u"OTR", u"jabber:x:encrypted": u"Legacy OpenPGP", u"urn:xmpp:openpgp:0": u"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(u"eme", NS_EME) def _addEMEElement(self, mess_data, namespace, name): message_elt = mess_data[u'xml'] encryption_elt = message_elt.addElement((NS_EME, u'encryption')) encryption_elt[u'namespace'] = namespace if name is not None: encryption_elt[u'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[u'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, u'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(u"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[u'from'] to_jid = jid.JID(message_elt[u'from']) algorithm = u"{} [{}]".format(name, namespace) if name else namespace log.warning( _(u"Message from {sender} is encrypted with {algorithm} and we can't " u"decrypt it.".format(sender=message_elt['from'], algorithm=algorithm))) user_msg = D_( u"User {sender} sent you an encrypted message (encrypted with {algorithm}), " u"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