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# Slixmpp: The Slick XMPP Library
# Copyright (C) 2012 Nathanael C. Fritz, Lance J.T. Stout
# This file is part of Slixmpp.
# See the file LICENSE for copying permission.
import logging
import ssl
from slixmpp.stanza import StreamFeatures, Iq
from slixmpp.xmlstream import register_stanza_plugin, JID
from slixmpp.xmlstream.handler import CoroutineCallback
from slixmpp.xmlstream.matcher import StanzaPath
from slixmpp.plugins import BasePlugin
from slixmpp.plugins.xep_0077 import stanza, Register, RegisterFeature
log = logging.getLogger(__name__)
class XEP_0077(BasePlugin):
"""
XEP-0077: In-Band Registration
Events:
::
user_register -- After succesful validation and add to the user store
in api["user_validate"]
user_unregister -- After succesful user removal in api["user_remove"]
Config:
::
form_fields are only form_instructions are only used for component registration
in case api["make_registration_form"] is not overriden.
API:
::
user_get(jid, node, ifrom, iq)
Returns a dict-like object containing `form_fields` for this user or None
user_remove(jid, node, ifrom, iq)
Removes a user or raise KeyError in case the user is not found in the user store
make_registration_form(self, jid, node, ifrom, iq)
Returns an iq reply to a registration form request, pre-filled and with
<registered/> in case the requesting entity is already registered to us
user_validate((self, jid, node, ifrom, registration)
Add the user to the user store or raise ValueError(msg) if any problem is encountered
msg is sent back to the XMPP client as an error message.
"""
name = 'xep_0077'
description = 'XEP-0077: In-Band Registration'
dependencies = {'xep_0004', 'xep_0066'}
stanza = stanza
default_config = {
'create_account': True,
'force_registration': False,
'order': 50,
"form_fields": {"username", "password"},
"form_instructions": "Enter your credentials",
}
def plugin_init(self):
register_stanza_plugin(StreamFeatures, RegisterFeature)
register_stanza_plugin(Iq, Register)
if self.xmpp.is_component:
self.xmpp["xep_0030"].add_feature("jabber:iq:register")
self.xmpp.register_handler(
CoroutineCallback(
"registration",
StanzaPath("/iq/register"),
self._handle_registration,
)
)
self._user_store = {}
self.api.register(self._user_get, "user_get")
self.api.register(self._user_remove, "user_remove")
self.api.register(self._make_registration_form, "make_registration_form")
self.api.register(self._user_validate, "user_validate")
else:
self.xmpp.register_feature(
"register",
self._handle_register_feature,
restart=False,
order=self.order,
)
register_stanza_plugin(Register, self.xmpp['xep_0004'].stanza.Form)
register_stanza_plugin(Register, self.xmpp['xep_0066'].stanza.OOB)
self.xmpp.add_event_handler('connected', self._force_registration)
def plugin_end(self):
if not self.xmpp.is_component:
self.xmpp.unregister_feature('register', self.order)
def _user_get(self, jid, node, ifrom, iq):
return self._user_store.get(iq["from"].bare)
def _user_remove(self, jid, node, ifrom, iq):
return self._user_store.pop(iq["from"].bare)
async def _make_registration_form(self, jid, node, ifrom, iq: Iq):
reg = iq["register"]
user = await self.api["user_get"](None, None, iq['from'], iq)
if user is None:
user = {}
else:
reg["registered"] = True
reg["instructions"] = self.form_instructions
for field in self.form_fields:
data = user.get(field, "")
if data:
reg[field] = data
else:
# Add a blank field
reg.add_field(field)
reply = iq.reply()
reply.set_payload(reg.xml)
return reply
def _user_validate(self, jid, node, ifrom, registration):
self._user_store[ifrom.bare] = {key: registration[key] for key in self.form_fields}
async def _handle_registration(self, iq: Iq):
if iq["type"] == "get":
await self._send_form(iq)
elif iq["type"] == "set":
if iq["register"]["remove"]:
try:
await self.api["user_remove"](None, None, iq["from"], iq)
except KeyError:
_send_error(
iq,
"404",
"cancel",
"item-not-found",
"User not found",
)
else:
reply = iq.reply()
reply.send()
self.xmpp.event("user_unregister", iq)
return
for field in self.form_fields:
if not iq["register"][field]:
# Incomplete Registration
_send_error(
iq,
"406",
"modify",
"not-acceptable",
"Please fill in all fields.",
)
return
try:
await self.api["user_validate"](None, None, iq["from"], iq["register"])
except ValueError as e:
_send_error(
iq,
"406",
"modify",
"not-acceptable",
e.args,
)
else:
reply = iq.reply()
reply.send()
self.xmpp.event("user_register", iq)
async def _send_form(self, iq):
reply = await self.api["make_registration_form"](None, None, iq["from"], iq)
reply.send()
def _force_registration(self, event):
if self.force_registration:
self.xmpp.add_filter('in', self._force_stream_feature)
def _force_stream_feature(self, stanza):
if isinstance(stanza, StreamFeatures):
if not self.xmpp.disable_starttls:
if 'starttls' not in self.xmpp.features:
return stanza
elif not isinstance(self.xmpp.socket, ssl.SSLSocket):
return stanza
if 'mechanisms' not in self.xmpp.features:
log.debug('Forced adding in-band registration stream feature')
stanza.enable('register')
self.xmpp.del_filter('in', self._force_stream_feature)
return stanza
async def _handle_register_feature(self, features):
if 'mechanisms' in self.xmpp.features:
# We have already logged in with an account
return False
if self.create_account and self.xmpp.event_handled('register'):
form = await self.get_registration()
await self.xmpp.event_async('register', form)
return True
return False
def get_registration(self, jid=None, ifrom=None,
timeout=None, callback=None):
iq = self.xmpp.Iq()
iq['type'] = 'get'
iq['to'] = jid
iq['from'] = ifrom
iq.enable('register')
return iq.send(timeout=timeout, callback=callback)
def cancel_registration(self, jid=None, ifrom=None,
timeout=None, callback=None):
iq = self.xmpp.Iq()
iq['type'] = 'set'
iq['to'] = jid
iq['from'] = ifrom
iq['register']['remove'] = True
return iq.send(timeout=timeout, callback=callback)
def change_password(self, password, jid=None, ifrom=None,
timeout=None, callback=None):
iq = self.xmpp.Iq()
iq['type'] = 'set'
iq['to'] = jid
iq['from'] = ifrom
if self.xmpp.is_component:
ifrom = JID(ifrom)
iq['register']['username'] = ifrom.user
else:
iq['register']['username'] = self.xmpp.boundjid.user
iq['register']['password'] = password
return iq.send(timeout=timeout, callback=callback)
def _send_error(iq, code, error_type, name, text=""):
# It would be nice to raise XMPPError but the iq payload
# should include the register info
reply = iq.reply()
reply.set_payload(iq["register"].xml)
reply.error()
reply["error"]["code"] = code
reply["error"]["type"] = error_type
reply["error"]["condition"] = name
reply["error"]["text"] = text
reply.send()
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