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690 lines
26 KiB
Python
690 lines
26 KiB
Python
# -*- coding: utf-8 -*-
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# Copyright 2014 - 2016 OpenMarket Ltd
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#
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# Licensed under the Apache License, Version 2.0 (the "License");
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# you may not use this file except in compliance with the License.
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# You may obtain a copy of the License at
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#
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# http://www.apache.org/licenses/LICENSE-2.0
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#
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# Unless required by applicable law or agreed to in writing, software
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# distributed under the License is distributed on an "AS IS" BASIS,
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# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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# See the License for the specific language governing permissions and
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# limitations under the License.
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"""Contains functions for registering clients."""
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import logging
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from twisted.internet import defer
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from synapse import types
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from synapse.api.constants import MAX_USERID_LENGTH, LoginType
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from synapse.api.errors import AuthError, Codes, ConsentNotGivenError, SynapseError
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from synapse.config.server import is_threepid_reserved
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from synapse.http.servlet import assert_params_in_dict
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from synapse.replication.http.login import RegisterDeviceReplicationServlet
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from synapse.replication.http.register import (
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ReplicationPostRegisterActionsServlet,
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ReplicationRegisterServlet,
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)
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from synapse.types import RoomAlias, RoomID, UserID, create_requester
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from synapse.util.async_helpers import Linearizer
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from ._base import BaseHandler
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logger = logging.getLogger(__name__)
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class RegistrationHandler(BaseHandler):
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def __init__(self, hs):
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"""
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Args:
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hs (synapse.server.HomeServer):
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"""
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super(RegistrationHandler, self).__init__(hs)
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self.hs = hs
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self.auth = hs.get_auth()
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self._auth_handler = hs.get_auth_handler()
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self.profile_handler = hs.get_profile_handler()
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self.user_directory_handler = hs.get_user_directory_handler()
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self.identity_handler = self.hs.get_handlers().identity_handler
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self.ratelimiter = hs.get_registration_ratelimiter()
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self._next_generated_user_id = None
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self.macaroon_gen = hs.get_macaroon_generator()
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self._generate_user_id_linearizer = Linearizer(
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name="_generate_user_id_linearizer"
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)
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self._server_notices_mxid = hs.config.server_notices_mxid
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if hs.config.worker_app:
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self._register_client = ReplicationRegisterServlet.make_client(hs)
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self._register_device_client = RegisterDeviceReplicationServlet.make_client(
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hs
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)
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self._post_registration_client = ReplicationPostRegisterActionsServlet.make_client(
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hs
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)
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else:
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self.device_handler = hs.get_device_handler()
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self.pusher_pool = hs.get_pusherpool()
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self.session_lifetime = hs.config.session_lifetime
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@defer.inlineCallbacks
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def check_username(self, localpart, guest_access_token=None, assigned_user_id=None):
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if types.contains_invalid_mxid_characters(localpart):
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raise SynapseError(
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400,
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"User ID can only contain characters a-z, 0-9, or '=_-./'",
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Codes.INVALID_USERNAME,
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)
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if not localpart:
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raise SynapseError(400, "User ID cannot be empty", Codes.INVALID_USERNAME)
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if localpart[0] == "_":
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raise SynapseError(
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400, "User ID may not begin with _", Codes.INVALID_USERNAME
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)
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user = UserID(localpart, self.hs.hostname)
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user_id = user.to_string()
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if assigned_user_id:
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if user_id == assigned_user_id:
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return
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else:
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raise SynapseError(
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400,
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"A different user ID has already been registered for this session",
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)
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self.check_user_id_not_appservice_exclusive(user_id)
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if len(user_id) > MAX_USERID_LENGTH:
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raise SynapseError(
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400,
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"User ID may not be longer than %s characters" % (MAX_USERID_LENGTH,),
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Codes.INVALID_USERNAME,
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)
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users = yield self.store.get_users_by_id_case_insensitive(user_id)
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if users:
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if not guest_access_token:
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raise SynapseError(
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400, "User ID already taken.", errcode=Codes.USER_IN_USE
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)
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user_data = yield self.auth.get_user_by_access_token(guest_access_token)
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if not user_data["is_guest"] or user_data["user"].localpart != localpart:
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raise AuthError(
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403,
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"Cannot register taken user ID without valid guest "
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"credentials for that user.",
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errcode=Codes.FORBIDDEN,
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)
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@defer.inlineCallbacks
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def register_user(
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self,
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localpart=None,
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password=None,
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guest_access_token=None,
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make_guest=False,
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admin=False,
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threepid=None,
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user_type=None,
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default_display_name=None,
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address=None,
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bind_emails=[],
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):
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"""Registers a new client on the server.
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Args:
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localpart : The local part of the user ID to register. If None,
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one will be generated.
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password (unicode) : The password to assign to this user so they can
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login again. This can be None which means they cannot login again
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via a password (e.g. the user is an application service user).
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user_type (str|None): type of user. One of the values from
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api.constants.UserTypes, or None for a normal user.
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default_display_name (unicode|None): if set, the new user's displayname
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will be set to this. Defaults to 'localpart'.
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address (str|None): the IP address used to perform the registration.
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bind_emails (List[str]): list of emails to bind to this account.
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Returns:
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Deferred[str]: user_id
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Raises:
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SynapseError if there was a problem registering.
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"""
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yield self.check_registration_ratelimit(address)
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yield self.auth.check_auth_blocking(threepid=threepid)
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password_hash = None
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if password:
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password_hash = yield defer.ensureDeferred(
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self._auth_handler.hash(password)
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)
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if localpart is not None:
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yield self.check_username(localpart, guest_access_token=guest_access_token)
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was_guest = guest_access_token is not None
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if not was_guest:
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try:
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int(localpart)
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raise SynapseError(
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400, "Numeric user IDs are reserved for guest users."
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)
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except ValueError:
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pass
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user = UserID(localpart, self.hs.hostname)
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user_id = user.to_string()
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if was_guest:
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# If the user was a guest then they already have a profile
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default_display_name = None
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elif default_display_name is None:
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default_display_name = localpart
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yield self.register_with_store(
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user_id=user_id,
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password_hash=password_hash,
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was_guest=was_guest,
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make_guest=make_guest,
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create_profile_with_displayname=default_display_name,
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admin=admin,
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user_type=user_type,
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address=address,
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)
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if self.hs.config.user_directory_search_all_users:
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profile = yield self.store.get_profileinfo(localpart)
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yield self.user_directory_handler.handle_local_profile_change(
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user_id, profile
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)
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else:
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# autogen a sequential user ID
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fail_count = 0
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user = None
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while not user:
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# Fail after being unable to find a suitable ID a few times
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if fail_count > 10:
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raise SynapseError(500, "Unable to find a suitable guest user ID")
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localpart = yield self._generate_user_id()
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user = UserID(localpart, self.hs.hostname)
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user_id = user.to_string()
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yield self.check_user_id_not_appservice_exclusive(user_id)
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if default_display_name is None:
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default_display_name = localpart
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try:
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yield self.register_with_store(
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user_id=user_id,
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password_hash=password_hash,
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make_guest=make_guest,
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create_profile_with_displayname=default_display_name,
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address=address,
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)
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# Successfully registered
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break
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except SynapseError:
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# if user id is taken, just generate another
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user = None
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user_id = None
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fail_count += 1
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if not self.hs.config.user_consent_at_registration:
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yield self._auto_join_rooms(user_id)
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else:
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logger.info(
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"Skipping auto-join for %s because consent is required at registration",
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user_id,
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)
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# Bind any specified emails to this account
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current_time = self.hs.get_clock().time_msec()
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for email in bind_emails:
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# generate threepid dict
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threepid_dict = {
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"medium": "email",
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"address": email,
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"validated_at": current_time,
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}
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# Bind email to new account
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yield self._register_email_threepid(user_id, threepid_dict, None)
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return user_id
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@defer.inlineCallbacks
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def _auto_join_rooms(self, user_id):
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"""Automatically joins users to auto join rooms - creating the room in the first place
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if the user is the first to be created.
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Args:
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user_id(str): The user to join
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"""
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# auto-join the user to any rooms we're supposed to dump them into
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fake_requester = create_requester(user_id)
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# try to create the room if we're the first real user on the server. Note
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# that an auto-generated support or bot user is not a real user and will never be
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# the user to create the room
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should_auto_create_rooms = False
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is_real_user = yield self.store.is_real_user(user_id)
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if self.hs.config.autocreate_auto_join_rooms and is_real_user:
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count = yield self.store.count_real_users()
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should_auto_create_rooms = count == 1
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for r in self.hs.config.auto_join_rooms:
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logger.info("Auto-joining %s to %s", user_id, r)
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try:
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if should_auto_create_rooms:
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room_alias = RoomAlias.from_string(r)
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if self.hs.hostname != room_alias.domain:
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logger.warning(
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"Cannot create room alias %s, "
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"it does not match server domain",
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r,
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)
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else:
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# create room expects the localpart of the room alias
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room_alias_localpart = room_alias.localpart
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# getting the RoomCreationHandler during init gives a dependency
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# loop
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yield self.hs.get_room_creation_handler().create_room(
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fake_requester,
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config={
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"preset": "public_chat",
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"room_alias_name": room_alias_localpart,
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},
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ratelimit=False,
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)
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else:
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yield self._join_user_to_room(fake_requester, r)
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except ConsentNotGivenError as e:
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# Technically not necessary to pull out this error though
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# moving away from bare excepts is a good thing to do.
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logger.error("Failed to join new user to %r: %r", r, e)
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except Exception as e:
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logger.error("Failed to join new user to %r: %r", r, e)
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@defer.inlineCallbacks
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def post_consent_actions(self, user_id):
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"""A series of registration actions that can only be carried out once consent
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has been granted
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Args:
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user_id (str): The user to join
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"""
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yield self._auto_join_rooms(user_id)
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@defer.inlineCallbacks
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def appservice_register(self, user_localpart, as_token):
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user = UserID(user_localpart, self.hs.hostname)
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user_id = user.to_string()
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service = self.store.get_app_service_by_token(as_token)
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if not service:
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raise AuthError(403, "Invalid application service token.")
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if not service.is_interested_in_user(user_id):
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raise SynapseError(
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400,
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"Invalid user localpart for this application service.",
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errcode=Codes.EXCLUSIVE,
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)
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service_id = service.id if service.is_exclusive_user(user_id) else None
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yield self.check_user_id_not_appservice_exclusive(
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user_id, allowed_appservice=service
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)
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yield self.register_with_store(
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user_id=user_id,
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password_hash="",
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appservice_id=service_id,
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create_profile_with_displayname=user.localpart,
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)
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return user_id
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def check_user_id_not_appservice_exclusive(self, user_id, allowed_appservice=None):
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# don't allow people to register the server notices mxid
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if self._server_notices_mxid is not None:
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if user_id == self._server_notices_mxid:
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raise SynapseError(
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400, "This user ID is reserved.", errcode=Codes.EXCLUSIVE
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)
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# valid user IDs must not clash with any user ID namespaces claimed by
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# application services.
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services = self.store.get_app_services()
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interested_services = [
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s
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for s in services
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if s.is_interested_in_user(user_id) and s != allowed_appservice
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]
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for service in interested_services:
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if service.is_exclusive_user(user_id):
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raise SynapseError(
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400,
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"This user ID is reserved by an application service.",
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errcode=Codes.EXCLUSIVE,
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)
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@defer.inlineCallbacks
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def _generate_user_id(self):
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if self._next_generated_user_id is None:
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with (yield self._generate_user_id_linearizer.queue(())):
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if self._next_generated_user_id is None:
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self._next_generated_user_id = (
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yield self.store.find_next_generated_user_id_localpart()
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)
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id = self._next_generated_user_id
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self._next_generated_user_id += 1
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return str(id)
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@defer.inlineCallbacks
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def _join_user_to_room(self, requester, room_identifier):
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room_member_handler = self.hs.get_room_member_handler()
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if RoomID.is_valid(room_identifier):
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room_id = room_identifier
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elif RoomAlias.is_valid(room_identifier):
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room_alias = RoomAlias.from_string(room_identifier)
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room_id, remote_room_hosts = yield room_member_handler.lookup_room_alias(
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room_alias
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)
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room_id = room_id.to_string()
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else:
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raise SynapseError(
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400, "%s was not legal room ID or room alias" % (room_identifier,)
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)
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yield room_member_handler.update_membership(
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requester=requester,
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target=requester.user,
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room_id=room_id,
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remote_room_hosts=remote_room_hosts,
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action="join",
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ratelimit=False,
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)
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def check_registration_ratelimit(self, address):
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"""A simple helper method to check whether the registration rate limit has been hit
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for a given IP address
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Args:
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address (str|None): the IP address used to perform the registration. If this is
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None, no ratelimiting will be performed.
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Raises:
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LimitExceededError: If the rate limit has been exceeded.
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"""
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if not address:
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return
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time_now = self.clock.time()
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self.ratelimiter.ratelimit(
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address,
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time_now_s=time_now,
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rate_hz=self.hs.config.rc_registration.per_second,
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burst_count=self.hs.config.rc_registration.burst_count,
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)
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def register_with_store(
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self,
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user_id,
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password_hash=None,
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was_guest=False,
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make_guest=False,
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appservice_id=None,
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create_profile_with_displayname=None,
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admin=False,
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user_type=None,
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address=None,
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):
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"""Register user in the datastore.
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Args:
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user_id (str): The desired user ID to register.
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password_hash (str|None): Optional. The password hash for this user.
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was_guest (bool): Optional. Whether this is a guest account being
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upgraded to a non-guest account.
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make_guest (boolean): True if the the new user should be guest,
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false to add a regular user account.
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appservice_id (str|None): The ID of the appservice registering the user.
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create_profile_with_displayname (unicode|None): Optionally create a
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profile for the user, setting their displayname to the given value
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admin (boolean): is an admin user?
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user_type (str|None): type of user. One of the values from
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api.constants.UserTypes, or None for a normal user.
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address (str|None): the IP address used to perform the registration.
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Returns:
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Deferred
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"""
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if self.hs.config.worker_app:
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return self._register_client(
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user_id=user_id,
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password_hash=password_hash,
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was_guest=was_guest,
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make_guest=make_guest,
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appservice_id=appservice_id,
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create_profile_with_displayname=create_profile_with_displayname,
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admin=admin,
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user_type=user_type,
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address=address,
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)
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else:
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return self.store.register_user(
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user_id=user_id,
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password_hash=password_hash,
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was_guest=was_guest,
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make_guest=make_guest,
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appservice_id=appservice_id,
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create_profile_with_displayname=create_profile_with_displayname,
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admin=admin,
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user_type=user_type,
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)
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@defer.inlineCallbacks
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def register_device(self, user_id, device_id, initial_display_name, is_guest=False):
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"""Register a device for a user and generate an access token.
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The access token will be limited by the homeserver's session_lifetime config.
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Args:
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user_id (str): full canonical @user:id
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device_id (str|None): The device ID to check, or None to generate
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a new one.
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initial_display_name (str|None): An optional display name for the
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device.
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is_guest (bool): Whether this is a guest account
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|
|
|
Returns:
|
|
defer.Deferred[tuple[str, str]]: Tuple of device ID and access token
|
|
"""
|
|
|
|
if self.hs.config.worker_app:
|
|
r = yield self._register_device_client(
|
|
user_id=user_id,
|
|
device_id=device_id,
|
|
initial_display_name=initial_display_name,
|
|
is_guest=is_guest,
|
|
)
|
|
return r["device_id"], r["access_token"]
|
|
|
|
valid_until_ms = None
|
|
if self.session_lifetime is not None:
|
|
if is_guest:
|
|
raise Exception(
|
|
"session_lifetime is not currently implemented for guest access"
|
|
)
|
|
valid_until_ms = self.clock.time_msec() + self.session_lifetime
|
|
|
|
device_id = yield self.device_handler.check_device_registered(
|
|
user_id, device_id, initial_display_name
|
|
)
|
|
if is_guest:
|
|
assert valid_until_ms is None
|
|
access_token = self.macaroon_gen.generate_access_token(
|
|
user_id, ["guest = true"]
|
|
)
|
|
else:
|
|
access_token = yield defer.ensureDeferred(
|
|
self._auth_handler.get_access_token_for_user_id(
|
|
user_id, device_id=device_id, valid_until_ms=valid_until_ms
|
|
)
|
|
)
|
|
|
|
return (device_id, access_token)
|
|
|
|
@defer.inlineCallbacks
|
|
def post_registration_actions(self, user_id, auth_result, access_token):
|
|
"""A user has completed registration
|
|
|
|
Args:
|
|
user_id (str): The user ID that consented
|
|
auth_result (dict): The authenticated credentials of the newly
|
|
registered user.
|
|
access_token (str|None): The access token of the newly logged in
|
|
device, or None if `inhibit_login` enabled.
|
|
"""
|
|
if self.hs.config.worker_app:
|
|
yield self._post_registration_client(
|
|
user_id=user_id, auth_result=auth_result, access_token=access_token
|
|
)
|
|
return
|
|
|
|
if auth_result and LoginType.EMAIL_IDENTITY in auth_result:
|
|
threepid = auth_result[LoginType.EMAIL_IDENTITY]
|
|
# Necessary due to auth checks prior to the threepid being
|
|
# written to the db
|
|
if is_threepid_reserved(
|
|
self.hs.config.mau_limits_reserved_threepids, threepid
|
|
):
|
|
yield self.store.upsert_monthly_active_user(user_id)
|
|
|
|
yield self._register_email_threepid(user_id, threepid, access_token)
|
|
|
|
if auth_result and LoginType.MSISDN in auth_result:
|
|
threepid = auth_result[LoginType.MSISDN]
|
|
yield self._register_msisdn_threepid(user_id, threepid)
|
|
|
|
if auth_result and LoginType.TERMS in auth_result:
|
|
yield self._on_user_consented(user_id, self.hs.config.user_consent_version)
|
|
|
|
@defer.inlineCallbacks
|
|
def _on_user_consented(self, user_id, consent_version):
|
|
"""A user consented to the terms on registration
|
|
|
|
Args:
|
|
user_id (str): The user ID that consented.
|
|
consent_version (str): version of the policy the user has
|
|
consented to.
|
|
"""
|
|
logger.info("%s has consented to the privacy policy", user_id)
|
|
yield self.store.user_set_consent_version(user_id, consent_version)
|
|
yield self.post_consent_actions(user_id)
|
|
|
|
@defer.inlineCallbacks
|
|
def _register_email_threepid(self, user_id, threepid, token):
|
|
"""Add an email address as a 3pid identifier
|
|
|
|
Also adds an email pusher for the email address, if configured in the
|
|
HS config
|
|
|
|
Must be called on master.
|
|
|
|
Args:
|
|
user_id (str): id of user
|
|
threepid (object): m.login.email.identity auth response
|
|
token (str|None): access_token for the user, or None if not logged
|
|
in.
|
|
Returns:
|
|
defer.Deferred:
|
|
"""
|
|
reqd = ("medium", "address", "validated_at")
|
|
if any(x not in threepid for x in reqd):
|
|
# This will only happen if the ID server returns a malformed response
|
|
logger.info("Can't add incomplete 3pid")
|
|
return
|
|
|
|
yield defer.ensureDeferred(
|
|
self._auth_handler.add_threepid(
|
|
user_id,
|
|
threepid["medium"],
|
|
threepid["address"],
|
|
threepid["validated_at"],
|
|
)
|
|
)
|
|
|
|
# And we add an email pusher for them by default, but only
|
|
# if email notifications are enabled (so people don't start
|
|
# getting mail spam where they weren't before if email
|
|
# notifs are set up on a homeserver)
|
|
if (
|
|
self.hs.config.email_enable_notifs
|
|
and self.hs.config.email_notif_for_new_users
|
|
and token
|
|
):
|
|
# Pull the ID of the access token back out of the db
|
|
# It would really make more sense for this to be passed
|
|
# up when the access token is saved, but that's quite an
|
|
# invasive change I'd rather do separately.
|
|
user_tuple = yield self.store.get_user_by_access_token(token)
|
|
token_id = user_tuple["token_id"]
|
|
|
|
yield self.pusher_pool.add_pusher(
|
|
user_id=user_id,
|
|
access_token=token_id,
|
|
kind="email",
|
|
app_id="m.email",
|
|
app_display_name="Email Notifications",
|
|
device_display_name=threepid["address"],
|
|
pushkey=threepid["address"],
|
|
lang=None, # We don't know a user's language here
|
|
data={},
|
|
)
|
|
|
|
@defer.inlineCallbacks
|
|
def _register_msisdn_threepid(self, user_id, threepid):
|
|
"""Add a phone number as a 3pid identifier
|
|
|
|
Must be called on master.
|
|
|
|
Args:
|
|
user_id (str): id of user
|
|
threepid (object): m.login.msisdn auth response
|
|
Returns:
|
|
defer.Deferred:
|
|
"""
|
|
try:
|
|
assert_params_in_dict(threepid, ["medium", "address", "validated_at"])
|
|
except SynapseError as ex:
|
|
if ex.errcode == Codes.MISSING_PARAM:
|
|
# This will only happen if the ID server returns a malformed response
|
|
logger.info("Can't add incomplete 3pid")
|
|
return None
|
|
raise
|
|
|
|
yield defer.ensureDeferred(
|
|
self._auth_handler.add_threepid(
|
|
user_id,
|
|
threepid["medium"],
|
|
threepid["address"],
|
|
threepid["validated_at"],
|
|
)
|
|
)
|