Mercurial > libervia-backend
view sat/plugins/plugin_xep_0380.py @ 2766:93a421de0e3d
tools (common/data_objects): metadata parsing in BlogItems:
metadata are parsed to deserialise some well known values like rsm index and count, and some properties have been added to have easier access.
A "complete" property (or item in metadata) is set to True if we are on the last page, False if we are not, or None if we don't have enough data to know if we are on the last page or not.
author | Goffi <goffi@goffi.org> |
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date | Fri, 11 Jan 2019 16:35:13 +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