RFR: 8314323: Implement JEP 527: TLS 1.3 Hybrid Key Exchange [v9]

[Bradford Wetmore]

On Mon, 1 Dec 2025 15:58:23 GMT, Sean Mullan <mullan at openjdk.org> wrote:

>> One other nit, currently the `Params` class doesn't actually handle `DH`, just `ECDH`/`XDH`.  Should you remove `DH` from the `DH/ECDH/XDH` javadoc?
>
> Also, if it is only used by JSSE, I think it should be in the `sun.security.ssl` package.

We did include the internal `Tls*` implementations Sun in the `SunJCE` provider, but those were actually exposed/available as `KeyGenerator`s.  I was never a fan, but it is what it is.  

`sun.security.ssl` is a better fit for this and `Hybrid.java`, especially since these are strictly internal implementations for now.

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PR Review Comment: https://git.openjdk.org/jdk/pull/27614#discussion_r2578818202