tree acc51487e6d64278dd2fb1974ebab05300d7e7df
parent caf5961d5a28df7a18274b932ddfb7fe2272c2dd
author Lily Chen <chlily@google.com> 1759430459 -0400
committer Boringssl LUCI CQ <boringssl-scoped@luci-project-accounts.iam.gserviceaccount.com> 1759431337 -0700

Add API for caller to hint server's preferred key shares

This change introduces a new mechanism for clients to provide a "hint"
about which key exchange groups the server is likely to support. This is
meant to be used for draft-ietf-tls-key-share-prediction.

We will try to make a prediction based on the server's hint, and if a
group was predicted, it is sent as the key_share, overriding any
explicit key shares configured by the caller.

Bug: 437414371
Change-Id: Ie98d2a63e5bfb4f10683ca4f1f77e5439b39e256
Reviewed-on: https://boringssl-review.googlesource.com/c/boringssl/+/81588
Reviewed-by: David Benjamin <davidben@google.com>
Commit-Queue: Lily Chen <chlily@google.com>