diff options
Diffstat (limited to 'synapse/handlers/device.py')
| -rw-r--r-- | synapse/handlers/device.py | 207 |
1 files changed, 161 insertions, 46 deletions
diff --git a/synapse/handlers/device.py b/synapse/handlers/device.py index 4b0a4f96cc..debb1b4f29 100644 --- a/synapse/handlers/device.py +++ b/synapse/handlers/device.py @@ -1,7 +1,7 @@ # -*- coding: utf-8 -*- # Copyright 2016 OpenMarket Ltd # Copyright 2019 New Vector Ltd -# Copyright 2019 The Matrix.org Foundation C.I.C. +# Copyright 2019,2020 The Matrix.org Foundation C.I.C. # # Licensed under the Apache License, Version 2.0 (the "License"); # you may not use this file except in compliance with the License. @@ -15,11 +15,12 @@ # See the License for the specific language governing permissions and # limitations under the License. import logging -from typing import Any, Dict, List, Optional +from typing import TYPE_CHECKING, Any, Dict, Iterable, List, Optional, Set, Tuple from synapse.api import errors from synapse.api.constants import EventTypes from synapse.api.errors import ( + Codes, FederationDeniedError, HttpResponseException, RequestSendFailed, @@ -28,8 +29,10 @@ from synapse.api.errors import ( from synapse.logging.opentracing import log_kv, set_tag, trace from synapse.metrics.background_process_metrics import run_as_background_process from synapse.types import ( - RoomStreamToken, + Collection, + JsonDict, StreamToken, + UserID, get_domain_from_id, get_verify_key_from_cross_signing_key, ) @@ -41,14 +44,17 @@ from synapse.util.retryutils import NotRetryingDestination from ._base import BaseHandler +if TYPE_CHECKING: + from synapse.app.homeserver import HomeServer + logger = logging.getLogger(__name__) MAX_DEVICE_DISPLAY_NAME_LEN = 100 class DeviceWorkerHandler(BaseHandler): - def __init__(self, hs): - super(DeviceWorkerHandler, self).__init__(hs) + def __init__(self, hs: "HomeServer"): + super().__init__(hs) self.hs = hs self.state = hs.get_state_handler() @@ -105,15 +111,16 @@ class DeviceWorkerHandler(BaseHandler): @trace @measure_func("device.get_user_ids_changed") - async def get_user_ids_changed(self, user_id: str, from_token: StreamToken): + async def get_user_ids_changed( + self, user_id: str, from_token: StreamToken + ) -> JsonDict: """Get list of users that have had the devices updated, or have newly joined a room, that `user_id` may be interested in. """ set_tag("user_id", user_id) set_tag("from_token", from_token) - now_room_id = self.store.get_room_max_stream_ordering() - now_room_key = RoomStreamToken(None, now_room_id) + now_room_key = self.store.get_room_max_token() room_ids = await self.store.get_rooms_for_user(user_id) @@ -222,8 +229,8 @@ class DeviceWorkerHandler(BaseHandler): possibly_joined = possibly_changed & users_who_share_room possibly_left = (possibly_changed | possibly_left) - users_who_share_room else: - possibly_joined = [] - possibly_left = [] + possibly_joined = set() + possibly_left = set() result = {"changed": list(possibly_joined), "left": list(possibly_left)} @@ -231,7 +238,7 @@ class DeviceWorkerHandler(BaseHandler): return result - async def on_federation_query_user_devices(self, user_id): + async def on_federation_query_user_devices(self, user_id: str) -> JsonDict: stream_id, devices = await self.store.get_e2e_device_keys_for_federation_query( user_id ) @@ -250,8 +257,8 @@ class DeviceWorkerHandler(BaseHandler): class DeviceHandler(DeviceWorkerHandler): - def __init__(self, hs): - super(DeviceHandler, self).__init__(hs) + def __init__(self, hs: "HomeServer"): + super().__init__(hs) self.federation_sender = hs.get_federation_sender() @@ -265,9 +272,30 @@ class DeviceHandler(DeviceWorkerHandler): hs.get_distributor().observe("user_left_room", self.user_left_room) + def _check_device_name_length(self, name: Optional[str]): + """ + Checks whether a device name is longer than the maximum allowed length. + + Args: + name: The name of the device. + + Raises: + SynapseError: if the device name is too long. + """ + if name and len(name) > MAX_DEVICE_DISPLAY_NAME_LEN: + raise SynapseError( + 400, + "Device display name is too long (max %i)" + % (MAX_DEVICE_DISPLAY_NAME_LEN,), + errcode=Codes.TOO_LARGE, + ) + async def check_device_registered( - self, user_id, device_id, initial_device_display_name=None - ): + self, + user_id: str, + device_id: Optional[str], + initial_device_display_name: Optional[str] = None, + ) -> str: """ If the given device has not been registered, register it with the supplied display name. @@ -275,13 +303,15 @@ class DeviceHandler(DeviceWorkerHandler): If no device_id is supplied, we make one up. Args: - user_id (str): @user:id - device_id (str | None): device id supplied by client - initial_device_display_name (str | None): device display name from - client + user_id: @user:id + device_id: device id supplied by client + initial_device_display_name: device display name from client Returns: - str: device id (generated if none was supplied) + device id (generated if none was supplied) """ + + self._check_device_name_length(initial_device_display_name) + if device_id is not None: new_device = await self.store.store_device( user_id=user_id, @@ -296,15 +326,15 @@ class DeviceHandler(DeviceWorkerHandler): # times in case of a clash. attempts = 0 while attempts < 5: - device_id = stringutils.random_string(10).upper() + new_device_id = stringutils.random_string(10).upper() new_device = await self.store.store_device( user_id=user_id, - device_id=device_id, + device_id=new_device_id, initial_device_display_name=initial_device_display_name, ) if new_device: - await self.notify_device_update(user_id, [device_id]) - return device_id + await self.notify_device_update(user_id, [new_device_id]) + return new_device_id attempts += 1 raise errors.StoreError(500, "Couldn't generate a device ID.") @@ -397,12 +427,8 @@ class DeviceHandler(DeviceWorkerHandler): # Reject a new displayname which is too long. new_display_name = content.get("display_name") - if new_display_name and len(new_display_name) > MAX_DEVICE_DISPLAY_NAME_LEN: - raise SynapseError( - 400, - "Device display name is too long (max %i)" - % (MAX_DEVICE_DISPLAY_NAME_LEN,), - ) + + self._check_device_name_length(new_display_name) try: await self.store.update_device( @@ -417,7 +443,9 @@ class DeviceHandler(DeviceWorkerHandler): @trace @measure_func("notify_device_update") - async def notify_device_update(self, user_id, device_ids): + async def notify_device_update( + self, user_id: str, device_ids: Collection[str] + ) -> None: """Notify that a user's device(s) has changed. Pokes the notifier, and remote servers if the user is local. """ @@ -429,7 +457,7 @@ class DeviceHandler(DeviceWorkerHandler): user_id ) - hosts = set() + hosts = set() # type: Set[str] if self.hs.is_mine_id(user_id): hosts.update(get_domain_from_id(u) for u in users_who_share_room) hosts.discard(self.server_name) @@ -481,7 +509,7 @@ class DeviceHandler(DeviceWorkerHandler): self.notifier.on_new_event("device_list_key", position, users=[from_user_id]) - async def user_left_room(self, user, room_id): + async def user_left_room(self, user: UserID, room_id: str) -> None: user_id = user.to_string() room_ids = await self.store.get_rooms_for_user(user_id) if not room_ids: @@ -489,8 +517,89 @@ class DeviceHandler(DeviceWorkerHandler): # receive device updates. Mark this in DB. await self.store.mark_remote_user_device_list_as_unsubscribed(user_id) + async def store_dehydrated_device( + self, + user_id: str, + device_data: JsonDict, + initial_device_display_name: Optional[str] = None, + ) -> str: + """Store a dehydrated device for a user. If the user had a previous + dehydrated device, it is removed. + + Args: + user_id: the user that we are storing the device for + device_data: the dehydrated device information + initial_device_display_name: The display name to use for the device + Returns: + device id of the dehydrated device + """ + device_id = await self.check_device_registered( + user_id, None, initial_device_display_name, + ) + old_device_id = await self.store.store_dehydrated_device( + user_id, device_id, device_data + ) + if old_device_id is not None: + await self.delete_device(user_id, old_device_id) + return device_id + + async def get_dehydrated_device( + self, user_id: str + ) -> Optional[Tuple[str, JsonDict]]: + """Retrieve the information for a dehydrated device. -def _update_device_from_client_ips(device, client_ips): + Args: + user_id: the user whose dehydrated device we are looking for + Returns: + a tuple whose first item is the device ID, and the second item is + the dehydrated device information + """ + return await self.store.get_dehydrated_device(user_id) + + async def rehydrate_device( + self, user_id: str, access_token: str, device_id: str + ) -> dict: + """Process a rehydration request from the user. + + Args: + user_id: the user who is rehydrating the device + access_token: the access token used for the request + device_id: the ID of the device that will be rehydrated + Returns: + a dict containing {"success": True} + """ + success = await self.store.remove_dehydrated_device(user_id, device_id) + + if not success: + raise errors.NotFoundError() + + # If the dehydrated device was successfully deleted (the device ID + # matched the stored dehydrated device), then modify the access + # token to use the dehydrated device's ID and copy the old device + # display name to the dehydrated device, and destroy the old device + # ID + old_device_id = await self.store.set_device_for_access_token( + access_token, device_id + ) + old_device = await self.store.get_device(user_id, old_device_id) + await self.store.update_device(user_id, device_id, old_device["display_name"]) + # can't call self.delete_device because that will clobber the + # access token so call the storage layer directly + await self.store.delete_device(user_id, old_device_id) + await self.store.delete_e2e_keys_by_device( + user_id=user_id, device_id=old_device_id + ) + + # tell everyone that the old device is gone and that the dehydrated + # device has a new display name + await self.notify_device_update(user_id, [old_device_id, device_id]) + + return {"success": True} + + +def _update_device_from_client_ips( + device: Dict[str, Any], client_ips: Dict[Tuple[str, str], Dict[str, Any]] +) -> None: ip = client_ips.get((device["user_id"], device["device_id"]), {}) device.update({"last_seen_ts": ip.get("last_seen"), "last_seen_ip": ip.get("ip")}) @@ -498,7 +607,7 @@ def _update_device_from_client_ips(device, client_ips): class DeviceListUpdater: "Handles incoming device list updates from federation and updates the DB" - def __init__(self, hs, device_handler): + def __init__(self, hs: "HomeServer", device_handler: DeviceHandler): self.store = hs.get_datastore() self.federation = hs.get_federation_client() self.clock = hs.get_clock() @@ -507,7 +616,9 @@ class DeviceListUpdater: self._remote_edu_linearizer = Linearizer(name="remote_device_list") # user_id -> list of updates waiting to be handled. - self._pending_updates = {} + self._pending_updates = ( + {} + ) # type: Dict[str, List[Tuple[str, str, Iterable[str], JsonDict]]] # Recently seen stream ids. We don't bother keeping these in the DB, # but they're useful to have them about to reduce the number of spurious @@ -530,7 +641,9 @@ class DeviceListUpdater: ) @trace - async def incoming_device_list_update(self, origin, edu_content): + async def incoming_device_list_update( + self, origin: str, edu_content: JsonDict + ) -> None: """Called on incoming device list update from federation. Responsible for parsing the EDU and adding to pending updates list. """ @@ -591,7 +704,7 @@ class DeviceListUpdater: await self._handle_device_updates(user_id) @measure_func("_incoming_device_list_update") - async def _handle_device_updates(self, user_id): + async def _handle_device_updates(self, user_id: str) -> None: "Actually handle pending updates." with (await self._remote_edu_linearizer.queue(user_id)): @@ -639,7 +752,9 @@ class DeviceListUpdater: stream_id for _, stream_id, _, _ in pending_updates ) - async def _need_to_do_resync(self, user_id, updates): + async def _need_to_do_resync( + self, user_id: str, updates: Iterable[Tuple[str, str, Iterable[str], JsonDict]] + ) -> bool: """Given a list of updates for a user figure out if we need to do a full resync, or whether we have enough data that we can just apply the delta. """ @@ -670,7 +785,7 @@ class DeviceListUpdater: return False @trace - async def _maybe_retry_device_resync(self): + async def _maybe_retry_device_resync(self) -> None: """Retry to resync device lists that are out of sync, except if another retry is in progress. """ @@ -713,7 +828,7 @@ class DeviceListUpdater: async def user_device_resync( self, user_id: str, mark_failed_as_stale: bool = True - ) -> Optional[dict]: + ) -> Optional[JsonDict]: """Fetches all devices for a user and updates the device cache with them. Args: @@ -737,7 +852,7 @@ class DeviceListUpdater: # it later. await self.store.mark_remote_user_device_cache_as_stale(user_id) - return + return None except (RequestSendFailed, HttpResponseException) as e: logger.warning( "Failed to handle device list update for %s: %s", user_id, e, @@ -754,12 +869,12 @@ class DeviceListUpdater: # next time we get a device list update for this user_id. # This makes it more likely that the device lists will # eventually become consistent. - return + return None except FederationDeniedError as e: set_tag("error", True) log_kv({"reason": "FederationDeniedError"}) logger.info(e) - return + return None except Exception as e: set_tag("error", True) log_kv( @@ -772,7 +887,7 @@ class DeviceListUpdater: # it later. await self.store.mark_remote_user_device_cache_as_stale(user_id) - return + return None log_kv({"result": result}) stream_id = result["stream_id"] devices = result["devices"] @@ -833,7 +948,7 @@ class DeviceListUpdater: user_id: str, master_key: Optional[Dict[str, Any]], self_signing_key: Optional[Dict[str, Any]], - ) -> list: + ) -> List[str]: """Process the given new master and self-signing key for the given remote user. Args: |