tree accccdce6b781605aebc92d9384b60a52070af51
parent 0fc4979ddc54eaa28b62af3cbf72ac870444bc52
author Adam Langley <alangley@gmail.com> 1563315981 -0700
committer Adam Langley <agl@google.com> 1563493196 +0000

Add post-quantum experiment signal extension.

When testing HRSS-SXY and SIKE, we also want a control group. However,
how are clients to indicate that they're part of the 1/3 of the
experiment population that's not advertising CECPQ? And how are servers
to indicate that they would have negotiated CECPQ2 / 2b if only the
client had asked?

This change adds a temporary signaling extension to solve these issues.

Change-Id: Ic087a09149ef10141568b734396981ae97950a9b
Reviewed-on: https://boringssl-review.googlesource.com/c/boringssl/+/36725
Reviewed-by: David Benjamin <davidben@google.com>