479 lines
18 KiB
Python
479 lines
18 KiB
Python
# Copyright 2017 New Vector Ltd
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# Copyright 2020 The Matrix.org Foundation C.I.C.
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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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import logging
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from typing import TYPE_CHECKING, Any, Generator, Iterable, List, Optional, Tuple
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from twisted.internet import defer
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from synapse.events import EventBase
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from synapse.http.client import SimpleHttpClient
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from synapse.http.site import SynapseRequest
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from synapse.logging.context import make_deferred_yieldable, run_in_background
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from synapse.storage.state import StateFilter
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from synapse.types import JsonDict, UserID, create_requester
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if TYPE_CHECKING:
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from synapse.server import HomeServer
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"""
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This package defines the 'stable' API which can be used by extension modules which
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are loaded into Synapse.
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"""
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__all__ = ["errors", "make_deferred_yieldable", "run_in_background", "ModuleApi"]
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logger = logging.getLogger(__name__)
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class ModuleApi:
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"""A proxy object that gets passed to various plugin modules so they
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can register new users etc if necessary.
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"""
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def __init__(self, hs, auth_handler):
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self._hs = hs
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self._store = hs.get_datastore()
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self._auth = hs.get_auth()
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self._auth_handler = auth_handler
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self._server_name = hs.hostname
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self._presence_stream = hs.get_event_sources().sources["presence"]
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# We expose these as properties below in order to attach a helpful docstring.
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self._http_client = hs.get_simple_http_client() # type: SimpleHttpClient
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self._public_room_list_manager = PublicRoomListManager(hs)
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# The next time these users sync, they will receive the current presence
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# state of all local users. Users are added by send_local_online_presence_to,
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# and removed after a successful sync.
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#
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# We make this a private variable to deter modules from accessing it directly,
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# though other classes in Synapse will still do so.
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self._send_full_presence_to_local_users = set()
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@property
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def http_client(self):
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"""Allows making outbound HTTP requests to remote resources.
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An instance of synapse.http.client.SimpleHttpClient
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"""
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return self._http_client
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@property
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def public_room_list_manager(self):
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"""Allows adding to, removing from and checking the status of rooms in the
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public room list.
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An instance of synapse.module_api.PublicRoomListManager
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"""
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return self._public_room_list_manager
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def get_user_by_req(self, req, allow_guest=False):
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"""Check the access_token provided for a request
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Args:
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req (twisted.web.server.Request): Incoming HTTP request
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allow_guest (bool): True if guest users should be allowed. If this
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is False, and the access token is for a guest user, an
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AuthError will be thrown
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Returns:
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twisted.internet.defer.Deferred[synapse.types.Requester]:
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the requester for this request
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Raises:
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synapse.api.errors.AuthError: if no user by that token exists,
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or the token is invalid.
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"""
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return self._auth.get_user_by_req(req, allow_guest)
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def get_qualified_user_id(self, username):
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"""Qualify a user id, if necessary
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Takes a user id provided by the user and adds the @ and :domain to
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qualify it, if necessary
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Args:
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username (str): provided user id
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Returns:
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str: qualified @user:id
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"""
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if username.startswith("@"):
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return username
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return UserID(username, self._hs.hostname).to_string()
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def check_user_exists(self, user_id):
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"""Check if user exists.
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Args:
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user_id (str): Complete @user:id
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Returns:
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Deferred[str|None]: Canonical (case-corrected) user_id, or None
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if the user is not registered.
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"""
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return defer.ensureDeferred(self._auth_handler.check_user_exists(user_id))
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@defer.inlineCallbacks
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def register(self, localpart, displayname=None, emails: Optional[List[str]] = None):
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"""Registers a new user with given localpart and optional displayname, emails.
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Also returns an access token for the new user.
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Deprecated: avoid this, as it generates a new device with no way to
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return that device to the user. Prefer separate calls to register_user and
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register_device.
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Args:
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localpart (str): The localpart of the new user.
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displayname (str|None): The displayname of the new user.
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emails (List[str]): Emails to bind to the new user.
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Returns:
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Deferred[tuple[str, str]]: a 2-tuple of (user_id, access_token)
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"""
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logger.warning(
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"Using deprecated ModuleApi.register which creates a dummy user device."
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)
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user_id = yield self.register_user(localpart, displayname, emails or [])
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_, access_token = yield self.register_device(user_id)
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return user_id, access_token
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def register_user(
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self, localpart, displayname=None, emails: Optional[List[str]] = None
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):
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"""Registers a new user with given localpart and optional displayname, emails.
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Args:
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localpart (str): The localpart of the new user.
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displayname (str|None): The displayname of the new user.
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emails (List[str]): Emails to bind to the new user.
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Raises:
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SynapseError if there is an error performing the registration. Check the
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'errcode' property for more information on the reason for failure
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Returns:
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defer.Deferred[str]: user_id
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"""
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return defer.ensureDeferred(
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self._hs.get_registration_handler().register_user(
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localpart=localpart,
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default_display_name=displayname,
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bind_emails=emails or [],
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)
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)
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def register_device(self, user_id, device_id=None, initial_display_name=None):
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"""Register a device for a user and generate an access token.
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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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Returns:
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defer.Deferred[tuple[str, str]]: Tuple of device ID and access token
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"""
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return defer.ensureDeferred(
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self._hs.get_registration_handler().register_device(
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user_id=user_id,
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device_id=device_id,
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initial_display_name=initial_display_name,
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)
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)
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def record_user_external_id(
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self, auth_provider_id: str, remote_user_id: str, registered_user_id: str
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) -> defer.Deferred:
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"""Record a mapping from an external user id to a mxid
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Args:
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auth_provider: identifier for the remote auth provider
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external_id: id on that system
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user_id: complete mxid that it is mapped to
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"""
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return defer.ensureDeferred(
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self._store.record_user_external_id(
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auth_provider_id, remote_user_id, registered_user_id
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)
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)
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def generate_short_term_login_token(
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self,
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user_id: str,
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duration_in_ms: int = (2 * 60 * 1000),
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auth_provider_id: str = "",
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) -> str:
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"""Generate a login token suitable for m.login.token authentication
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Args:
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user_id: gives the ID of the user that the token is for
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duration_in_ms: the time that the token will be valid for
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auth_provider_id: the ID of the SSO IdP that the user used to authenticate
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to get this token, if any. This is encoded in the token so that
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/login can report stats on number of successful logins by IdP.
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"""
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return self._hs.get_macaroon_generator().generate_short_term_login_token(
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user_id,
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auth_provider_id,
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duration_in_ms,
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)
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@defer.inlineCallbacks
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def invalidate_access_token(self, access_token):
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"""Invalidate an access token for a user
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Args:
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access_token(str): access token
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Returns:
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twisted.internet.defer.Deferred - resolves once the access token
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has been removed.
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Raises:
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synapse.api.errors.AuthError: the access token is invalid
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"""
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# see if the access token corresponds to a device
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user_info = yield defer.ensureDeferred(
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self._auth.get_user_by_access_token(access_token)
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)
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device_id = user_info.get("device_id")
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user_id = user_info["user"].to_string()
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if device_id:
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# delete the device, which will also delete its access tokens
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yield defer.ensureDeferred(
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self._hs.get_device_handler().delete_device(user_id, device_id)
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)
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else:
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# no associated device. Just delete the access token.
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yield defer.ensureDeferred(
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self._auth_handler.delete_access_token(access_token)
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)
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def run_db_interaction(self, desc, func, *args, **kwargs):
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"""Run a function with a database connection
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Args:
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desc (str): description for the transaction, for metrics etc
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func (func): function to be run. Passed a database cursor object
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as well as *args and **kwargs
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*args: positional args to be passed to func
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**kwargs: named args to be passed to func
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Returns:
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Deferred[object]: result of func
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"""
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return defer.ensureDeferred(
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self._store.db_pool.runInteraction(desc, func, *args, **kwargs)
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)
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def complete_sso_login(
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self, registered_user_id: str, request: SynapseRequest, client_redirect_url: str
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):
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"""Complete a SSO login by redirecting the user to a page to confirm whether they
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want their access token sent to `client_redirect_url`, or redirect them to that
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URL with a token directly if the URL matches with one of the whitelisted clients.
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This is deprecated in favor of complete_sso_login_async.
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Args:
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registered_user_id: The MXID that has been registered as a previous step of
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of this SSO login.
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request: The request to respond to.
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client_redirect_url: The URL to which to offer to redirect the user (or to
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redirect them directly if whitelisted).
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"""
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self._auth_handler._complete_sso_login(
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registered_user_id,
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"<unknown>",
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request,
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client_redirect_url,
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)
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async def complete_sso_login_async(
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self,
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registered_user_id: str,
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request: SynapseRequest,
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client_redirect_url: str,
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new_user: bool = False,
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auth_provider_id: str = "<unknown>",
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):
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"""Complete a SSO login by redirecting the user to a page to confirm whether they
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want their access token sent to `client_redirect_url`, or redirect them to that
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URL with a token directly if the URL matches with one of the whitelisted clients.
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Args:
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registered_user_id: The MXID that has been registered as a previous step of
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of this SSO login.
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request: The request to respond to.
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client_redirect_url: The URL to which to offer to redirect the user (or to
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redirect them directly if whitelisted).
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new_user: set to true to use wording for the consent appropriate to a user
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who has just registered.
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auth_provider_id: the ID of the SSO IdP which was used to log in. This
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is used to track counts of sucessful logins by IdP.
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"""
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await self._auth_handler.complete_sso_login(
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registered_user_id,
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auth_provider_id,
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request,
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client_redirect_url,
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new_user=new_user,
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)
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@defer.inlineCallbacks
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def get_state_events_in_room(
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self, room_id: str, types: Iterable[Tuple[str, Optional[str]]]
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) -> Generator[defer.Deferred, Any, defer.Deferred]:
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"""Gets current state events for the given room.
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(This is exposed for compatibility with the old SpamCheckerApi. We should
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probably deprecate it and replace it with an async method in a subclass.)
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Args:
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room_id: The room ID to get state events in.
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types: The event type and state key (using None
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to represent 'any') of the room state to acquire.
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Returns:
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twisted.internet.defer.Deferred[list(synapse.events.FrozenEvent)]:
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The filtered state events in the room.
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"""
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state_ids = yield defer.ensureDeferred(
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self._store.get_filtered_current_state_ids(
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room_id=room_id, state_filter=StateFilter.from_types(types)
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)
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)
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state = yield defer.ensureDeferred(self._store.get_events(state_ids.values()))
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return state.values()
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async def create_and_send_event_into_room(self, event_dict: JsonDict) -> EventBase:
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"""Create and send an event into a room. Membership events are currently not supported.
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Args:
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event_dict: A dictionary representing the event to send.
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Required keys are `type`, `room_id`, `sender` and `content`.
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Returns:
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The event that was sent. If state event deduplication happened, then
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the previous, duplicate event instead.
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Raises:
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SynapseError if the event was not allowed.
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"""
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# Create a requester object
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requester = create_requester(
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event_dict["sender"], authenticated_entity=self._server_name
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)
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# Create and send the event
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(
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event,
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_,
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) = await self._hs.get_event_creation_handler().create_and_send_nonmember_event(
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requester,
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event_dict,
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ratelimit=False,
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ignore_shadow_ban=True,
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)
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return event
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async def send_local_online_presence_to(self, users: Iterable[str]) -> None:
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"""
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Forces the equivalent of a presence initial_sync for a set of local or remote
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users. The users will receive presence for all currently online users that they
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are considered interested in.
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Updates to remote users will be sent immediately, whereas local users will receive
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them on their next sync attempt.
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Note that this method can only be run on the main or federation_sender worker
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processes.
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"""
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if not self._hs.should_send_federation():
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raise Exception(
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"send_local_online_presence_to can only be run "
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"on processes that send federation",
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)
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for user in users:
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if self._hs.is_mine_id(user):
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# Modify SyncHandler._generate_sync_entry_for_presence to call
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# presence_source.get_new_events with an empty `from_key` if
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# that user's ID were in a list modified by ModuleApi somewhere.
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# That user would then get all presence state on next incremental sync.
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# Force a presence initial_sync for this user next time
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self._send_full_presence_to_local_users.add(user)
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else:
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# Retrieve presence state for currently online users that this user
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# is considered interested in
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presence_events, _ = await self._presence_stream.get_new_events(
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UserID.from_string(user), from_key=None, include_offline=False
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)
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# Send to remote destinations
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await make_deferred_yieldable(
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# We pull the federation sender here as we can only do so on workers
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# that support sending presence
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self._hs.get_federation_sender().send_presence(presence_events)
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)
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class PublicRoomListManager:
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"""Contains methods for adding to, removing from and querying whether a room
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is in the public room list.
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"""
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def __init__(self, hs: "HomeServer"):
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self._store = hs.get_datastore()
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async def room_is_in_public_room_list(self, room_id: str) -> bool:
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"""Checks whether a room is in the public room list.
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Args:
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room_id: The ID of the room.
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Returns:
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Whether the room is in the public room list. Returns False if the room does
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not exist.
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"""
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room = await self._store.get_room(room_id)
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if not room:
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return False
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return room.get("is_public", False)
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async def add_room_to_public_room_list(self, room_id: str) -> None:
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"""Publishes a room to the public room list.
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Args:
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room_id: The ID of the room.
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"""
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await self._store.set_room_is_public(room_id, True)
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async def remove_room_from_public_room_list(self, room_id: str) -> None:
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"""Removes a room from the public room list.
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Args:
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room_id: The ID of the room.
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"""
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await self._store.set_room_is_public(room_id, False)
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