tree d0b6e0aafa203bb7a50b38e4caed131450cba3c1
parent e62bf02a131a14b6ec6ebea3590342a6c8265bbf
author Matthew Braithwaite <mab@google.com> 1531265242 -0700
committer Matt Braithwaite <mab@google.com> 1541187942 +0000

Serialize SSL configuration in handoff and check it on application.

A split SSL handshake may involve 2 binaries, potentially built at
different versions: call them the "handoff/handback" binary and the
"handshake" binary.  We would like to guarantee that the
handoff/handback binary does not make any promises that the handshake
binary cannot keep.

As a start, this commit serializes |kCiphers| to the handoff message.
When the handoff message is applied to an |SSL|, any configured
ciphers not listed in the handoff message will be removed, in order to
prevent them from being negotiated.

Subsequent commits will apply the same approach to other lists of features.

Change-Id: Idf6dbeadb750c076ab0509c09b9d3f22eb162b9c
Reviewed-on: https://boringssl-review.googlesource.com/c/29264
Reviewed-by: Matt Braithwaite <mab@google.com>