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# Source code for slixmpp.plugins.xep_0380.eme

    # Slixmpp: The Slick XMPP Library
    # Copyright (C) 2016 Emmanuel Gil Peyrot <linkmauve@linkmauve.fr>
    # This file is part of Slixmpp.
    # See the file LICENSE for copying permission.
    import logging

    import slixmpp
    from slixmpp.stanza import Message
    from slixmpp.xmlstream.handler import Callback
    from slixmpp.xmlstream.matcher import StanzaPath
    from slixmpp.xmlstream import register_stanza_plugin, ElementBase, ET
    from slixmpp.plugins import BasePlugin
    from slixmpp.plugins.xep_0380 import stanza, Encryption

    log = logging.getLogger(__name__)

    class XEP_0380(BasePlugin):

        """
        XEP-0380: Explicit Message Encryption
        """

        name = 'xep_0380'
        description = 'XEP-0380: Explicit Message Encryption'
        dependencies = {'xep_0030'}
        default_config = {
            'template': 'This message is encrypted with {name} ({namespace})',
        }

        mechanisms = {
            'jabber:x:encrypted': 'Legacy OpenPGP',
            'urn:xmpp:ox:0': 'OpenPGP for XMPP',
            'urn:xmpp:otr:0': 'OTR',
            'eu.siacs.conversations.axolotl': 'Legacy OMEMO',
            'urn:xmpp:omemo:0': 'OMEMO',
        }

        def plugin_init(self):
            self.xmpp.register_handler(
                Callback('Explicit Message Encryption',
                         StanzaPath('message/eme'),
                         self._handle_eme))

            register_stanza_plugin(Message, Encryption)

        def session_bind(self, jid):
            self.xmpp.plugin['xep_0030'].add_feature(Encryption.namespace)

        def has_eme(self, msg):
            return msg.xml.find('{%s}encryption' % Encryption.namespace) is not None

        def add_eme(self, msg: Message, namespace: str) -> Message:
            msg['eme']['name'] = self.mechanisms[namespace]
            msg['eme']['namespace'] = namespace
            return msg

        def replace_body_with_eme(self, msg):
            eme = msg['eme']
            namespace = eme['namespace']
            name = self.mechanisms[namespace] if namespace in self.mechanisms else eme['name']
            body = self.config['template'].format(name=name, namespace=namespace)
            msg['body'] = body

        def _handle_eme(self, msg):
            self.xmpp.event('message_encryption', msg)