diff --git a/synapse/rest/client/v2_alpha/keys.py b/synapse/rest/client/v2_alpha/keys.py
index 55c4606569..b91996c738 100644
--- a/synapse/rest/client/v2_alpha/keys.py
+++ b/synapse/rest/client/v2_alpha/keys.py
@@ -1,6 +1,7 @@
# -*- coding: utf-8 -*-
# Copyright 2015, 2016 OpenMarket Ltd
# Copyright 2019 New Vector Ltd
+# Copyright 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.
@@ -67,6 +68,7 @@ class KeyUploadServlet(RestServlet):
super().__init__()
self.auth = hs.get_auth()
self.e2e_keys_handler = hs.get_e2e_keys_handler()
+ self.device_handler = hs.get_device_handler()
@trace(opname="upload_keys")
async def on_POST(self, request, device_id):
@@ -75,23 +77,28 @@ class KeyUploadServlet(RestServlet):
body = parse_json_object_from_request(request)
if device_id is not None:
- # passing the device_id here is deprecated; however, we allow it
- # for now for compatibility with older clients.
+ # Providing the device_id should only be done for setting keys
+ # for dehydrated devices; however, we allow it for any device for
+ # compatibility with older clients.
if requester.device_id is not None and device_id != requester.device_id:
- set_tag("error", True)
- log_kv(
- {
- "message": "Client uploading keys for a different device",
- "logged_in_id": requester.device_id,
- "key_being_uploaded": device_id,
- }
- )
- logger.warning(
- "Client uploading keys for a different device "
- "(logged in as %s, uploading for %s)",
- requester.device_id,
- device_id,
+ dehydrated_device = await self.device_handler.get_dehydrated_device(
+ user_id
)
+ if dehydrated_device is not None and device_id != dehydrated_device[0]:
+ set_tag("error", True)
+ log_kv(
+ {
+ "message": "Client uploading keys for a different device",
+ "logged_in_id": requester.device_id,
+ "key_being_uploaded": device_id,
+ }
+ )
+ logger.warning(
+ "Client uploading keys for a different device "
+ "(logged in as %s, uploading for %s)",
+ requester.device_id,
+ device_id,
+ )
else:
device_id = requester.device_id
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