--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/sat/plugins/plugin_xep_0077.py	Mon Apr 02 19:44:50 2018 +0200
@@ -0,0 +1,228 @@
+#!/usr/bin/env python2
+# -*- coding: utf-8 -*-
+
+# SAT plugin for managing xep-0077
+# Copyright (C) 2009-2018 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 _
+from sat.core.constants import Const as C
+from sat.core import exceptions
+from sat.core.log import getLogger
+log = getLogger(__name__)
+from twisted.words.protocols.jabber import jid
+from twisted.words.protocols.jabber import xmlstream
+from twisted.internet import defer, reactor
+from sat.tools import xml_tools
+
+from wokkel import data_form
+
+NS_REG = 'jabber:iq:register'
+
+PLUGIN_INFO = {
+    C.PI_NAME: "XEP 0077 Plugin",
+    C.PI_IMPORT_NAME: "XEP-0077",
+    C.PI_TYPE: "XEP",
+    C.PI_PROTOCOLS: ["XEP-0077"],
+    C.PI_DEPENDENCIES: [],
+    C.PI_MAIN: "XEP_0077",
+    C.PI_DESCRIPTION: _("""Implementation of in-band registration""")
+}
+
+# FIXME: this implementation is incomplete
+
+class RegisteringAuthenticator(xmlstream.ConnectAuthenticator):
+    # FIXME: request IQ is not send to check available fields, while XEP recommand to use it
+    # FIXME: doesn't handle data form or oob
+
+    def __init__(self, jid_, password, email=None):
+        xmlstream.ConnectAuthenticator.__init__(self, jid_.host)
+        self.jid = jid_
+        self.password = password
+        self.email = email
+        self.registered = defer.Deferred()
+        log.debug(_(u"Registration asked for {jid}").format(
+            jid = jid_))
+
+    def connectionMade(self):
+        log.debug(_(u"Connection made with {server}".format(server=self.jid.host)))
+        self.xmlstream.otherEntity = jid.JID(self.jid.host)
+        self.xmlstream.namespace = C.NS_CLIENT
+        self.xmlstream.sendHeader()
+
+        iq = XEP_0077.buildRegisterIQ(self.xmlstream, self.jid, self.password, self.email)
+        d = iq.send(self.jid.host).addCallbacks(self.registrationCb, self.registrationEb)
+        d.chainDeferred(self.registered)
+
+    def registrationCb(self, answer):
+        log.debug(_(u"Registration answer: {}").format(answer.toXml()))
+        self.xmlstream.sendFooter()
+
+    def registrationEb(self, failure_):
+        log.info(_("Registration failure: {}").format(unicode(failure_.value)))
+        self.xmlstream.sendFooter()
+        raise failure_
+
+
+class XEP_0077(object):
+
+    def __init__(self, host):
+        log.info(_("Plugin XEP_0077 initialization"))
+        self.host = host
+        host.bridge.addMethod("inBandRegister", ".plugin", in_sign='ss', out_sign='',
+                              method=self._inBandRegister,
+                              async=True)
+        host.bridge.addMethod("inBandAccountNew", ".plugin", in_sign='ssssi', out_sign='',
+                              method=self._registerNewAccount,
+                              async=True)
+        host.bridge.addMethod("inBandUnregister", ".plugin", in_sign='ss', out_sign='',
+                              method=self._unregister,
+                              async=True)
+        host.bridge.addMethod("inBandPasswordChange", ".plugin", in_sign='ss', out_sign='',
+                              method=self._changePassword,
+                              async=True)
+
+    @staticmethod
+    def buildRegisterIQ(xmlstream_, jid_, password, email=None):
+        iq_elt = xmlstream.IQ(xmlstream_, 'set')
+        iq_elt["to"] = jid_.host
+        query_elt = iq_elt.addElement(('jabber:iq:register', 'query'))
+        username_elt = query_elt.addElement('username')
+        username_elt.addContent(jid_.user)
+        password_elt = query_elt.addElement('password')
+        password_elt.addContent(password)
+        if email is not None:
+            email_elt = query_elt.addElement('email')
+            email_elt.addContent(email)
+        return iq_elt
+
+    def _regCb(self, answer, client, post_treat_cb):
+        """Called after the first get IQ"""
+        try:
+            query_elt = answer.elements(NS_REG, 'query').next()
+        except StopIteration:
+            raise exceptions.DataError("Can't find expected query element")
+
+        try:
+            x_elem = query_elt.elements(data_form.NS_X_DATA, 'x').next()
+        except StopIteration:
+            # XXX: it seems we have an old service which doesn't manage data forms
+            log.warning(_("Can't find data form"))
+            raise exceptions.DataError(_("This gateway can't be managed by SàT, sorry :("))
+
+        def submitForm(data, profile):
+            form_elt = xml_tools.XMLUIResultToElt(data)
+
+            iq_elt = client.IQ()
+            iq_elt['id'] = answer['id']
+            iq_elt['to'] = answer['from']
+            query_elt = iq_elt.addElement("query", NS_REG)
+            query_elt.addChild(form_elt)
+            d = iq_elt.send()
+            d.addCallback(self._regSuccess, client, post_treat_cb)
+            d.addErrback(self._regFailure, client)
+            return d
+
+        form = data_form.Form.fromElement(x_elem)
+        submit_reg_id = self.host.registerCallback(submitForm, with_data=True, one_shot=True)
+        return xml_tools.dataForm2XMLUI(form, submit_reg_id)
+
+    def _regEb(self, failure, client):
+        """Called when something is wrong with registration"""
+        log.info(_("Registration failure: %s") % unicode(failure.value))
+        raise failure
+
+    def _regSuccess(self, answer, client, post_treat_cb):
+        log.debug(_(u"registration answer: %s") % answer.toXml())
+        if post_treat_cb is not None:
+            post_treat_cb(jid.JID(answer['from']), client.profile)
+        return {}
+
+    def _regFailure(self, failure, client):
+        log.info(_(u"Registration failure: %s") % unicode(failure.value))
+        if failure.value.condition == 'conflict':
+            raise exceptions.ConflictError( _("Username already exists, please choose an other one"))
+        raise failure
+
+    def _inBandRegister(self, to_jid_s, profile_key=C.PROF_KEY_NONE):
+        return self.inBandRegister, jid.JID(to_jid_s, profile_key)
+
+    def inBandRegister(self, to_jid, post_treat_cb=None, profile_key=C.PROF_KEY_NONE):
+        """register to a service
+
+        @param to_jid(jid.JID): jid of the service to register to
+        """
+        # FIXME: this post_treat_cb arguments seems wrong, check it
+        client = self.host.getClient(profile_key)
+        log.debug(_(u"Asking registration for {}").format(to_jid.full()))
+        reg_request = client.IQ(u'get')
+        reg_request["from"] = client.jid.full()
+        reg_request["to"] = to_jid.full()
+        reg_request.addElement('query', NS_REG)
+        d = reg_request.send(to_jid.full()).addCallbacks(self._regCb, self._regEb, callbackArgs=[client, post_treat_cb], errbackArgs=[client])
+        return d
+
+    def _registerNewAccount(self, jid_, password, email, host, port):
+        kwargs = {}
+        if email:
+            kwargs['email'] = email
+        if host:
+            kwargs['host'] = host
+        if port:
+            kwargs['port'] = port
+        return self.registerNewAccount(jid.JID(jid_), password, **kwargs)
+
+    def registerNewAccount(self, jid_, password, email=None, host=u"127.0.0.1", port=C.XMPP_C2S_PORT):
+        """register a new account on a XMPP server
+
+        @param jid_(jid.JID): request jid to register
+        @param password(unicode): password of the account
+        @param email(unicode): email of the account
+        @param host(unicode): host of the server to register to
+        @param port(int): port of the server to register to
+        """
+        authenticator = RegisteringAuthenticator(jid_, password, email)
+        registered_d = authenticator.registered
+        serverRegistrer = xmlstream.XmlStreamFactory(authenticator)
+        connector = reactor.connectTCP(host, port, serverRegistrer)
+        serverRegistrer.clientConnectionLost = lambda conn, reason: connector.disconnect()
+        return registered_d
+
+    def _changePassword(self, new_password, profile_key):
+        client = self.host.getClient(profile_key)
+        return self.changePassword(client, new_password)
+
+    def changePassword(self, client, new_password):
+        iq_elt = self.buildRegisterIQ(client.xmlstream, client.jid, new_password)
+        d = iq_elt.send(client.jid.host)
+        d.addCallback(lambda dummy: self.host.memory.setParam("Password", new_password, "Connection", profile_key=client.profile))
+        return d
+
+    def _unregister(self, to_jid_s, profile_key):
+        client = self.host.getClient(profile_key)
+        return self.unregister(client, jid.JID(to_jid_s))
+
+    def unregister(self, client, to_jid):
+        """remove registration from a server/service
+
+        BEWARE! if you remove registration from profile own server, this will
+        DELETE THE XMPP ACCOUNT WITHOUT WARNING
+        @param to_jid(jid.JID): jid of the service or server
+        """
+        iq_elt = client.IQ()
+        iq_elt['to'] = to_jid.full()
+        query_elt = iq_elt.addElement((NS_REG, u'query'))
+        query_elt.addElement(u'remove')
+        return iq_elt.send()