diff options
| -rw-r--r-- | changelog.d/9634.misc | 1 | ||||
| -rw-r--r-- | synapse/handlers/device.py | 22 |
2 files changed, 19 insertions, 4 deletions
diff --git a/changelog.d/9634.misc b/changelog.d/9634.misc new file mode 100644 index 0000000000..59ac42cb83 --- /dev/null +++ b/changelog.d/9634.misc @@ -0,0 +1 @@ +Only save remote cross-signing and device keys if they're different from the current ones. diff --git a/synapse/handlers/device.py b/synapse/handlers/device.py index 6aa3f73eee..2fc4951df4 100644 --- a/synapse/handlers/device.py +++ b/synapse/handlers/device.py @@ -907,6 +907,7 @@ class DeviceListUpdater: master_key = result.get("master_key") self_signing_key = result.get("self_signing_key") + ignore_devices = False # If the remote server has more than ~1000 devices for this user # we assume that something is going horribly wrong (e.g. a bot # that logs in and creates a new device every time it tries to @@ -925,6 +926,12 @@ class DeviceListUpdater: len(devices), ) devices = [] + ignore_devices = True + else: + cached_devices = await self.store.get_cached_devices_for_user(user_id) + if cached_devices == {d["device_id"]: d for d in devices}: + devices = [] + ignore_devices = True for device in devices: logger.debug( @@ -934,7 +941,10 @@ class DeviceListUpdater: stream_id, ) - await self.store.update_remote_device_list_cache(user_id, devices, stream_id) + if not ignore_devices: + await self.store.update_remote_device_list_cache( + user_id, devices, stream_id + ) device_ids = [device["device_id"] for device in devices] # Handle cross-signing keys. @@ -945,7 +955,8 @@ class DeviceListUpdater: ) device_ids = device_ids + cross_signing_device_ids - await self.device_handler.notify_device_update(user_id, device_ids) + if device_ids: + await self.device_handler.notify_device_update(user_id, device_ids) # We clobber the seen updates since we've re-synced from a given # point. @@ -973,14 +984,17 @@ class DeviceListUpdater: """ device_ids = [] - if master_key: + current_keys_map = await self.store.get_e2e_cross_signing_keys_bulk([user_id]) + current_keys = current_keys_map.get(user_id) or {} + + if master_key and master_key != current_keys.get("master"): await self.store.set_e2e_cross_signing_key(user_id, "master", master_key) _, verify_key = get_verify_key_from_cross_signing_key(master_key) # verify_key is a VerifyKey from signedjson, which uses # .version to denote the portion of the key ID after the # algorithm and colon, which is the device ID device_ids.append(verify_key.version) - if self_signing_key: + if self_signing_key and self_signing_key != current_keys.get("self_signing"): await self.store.set_e2e_cross_signing_key( user_id, "self_signing", self_signing_key ) |