Neil Alexander 6d78c4d67d
Fix retrieving cross-signing signatures in /user/devices/{userId} (#2368)
* Fix retrieving cross-signing signatures in `/user/devices/{userId}`

We need to know the target device IDs in order to get the signatures and we weren't populating those.

* Fix up signature retrieval

* Fix SQLite

* Always include the target's own signatures as well as the requesting user
2022-04-22 14:58:24 +01:00
..
2022-03-29 14:14:35 +02:00
2022-03-29 14:14:35 +02:00
2022-03-23 10:20:18 +00:00

Key Server

This is an internal component which manages E2E keys from clients. It handles all the Key Management APIs with the exception of /keys/changes which is handled by Sync API. This component is designed to shard by user ID.

Keys are uploaded and stored in this component, and key changes are emitted to a Kafka topic for downstream components such as Sync API.

Internal APIs

  • PerformUploadKeys stores identity keys and one-time public keys for given user(s).
  • PerformClaimKeys acquires one-time public keys for given user(s). This may involve outbound federation calls.
  • QueryKeys returns identity keys for given user(s). This may involve outbound federation calls. This component may then cache federated identity keys to avoid repeatedly hitting remote servers.
  • A topic which emits identity keys every time there is a change (addition or deletion).

### Endpoint mappings

  • Client API maps /keys/upload to PerformUploadKeys.
  • Client API maps /keys/query to QueryKeys.
  • Client API maps /keys/claim to PerformClaimKeys.
  • Federation API maps /user/keys/query to QueryKeys.
  • Federation API maps /user/keys/claim to PerformClaimKeys.
  • Sync API maps /keys/changes to consuming from the Kafka topic.