RFR: 8353578: Refactor existing usage of internal HKDF impl to use the KDF API [v8]

[Bradford Wetmore]

On Thu, 8 May 2025 21:19:10 GMT, Valerie Peng <valeriep at openjdk.org> wrote:

>> This PR removes the internal JSSE HKDF impl and changes to use the KDF API for the HKDF support from JCA/JCE providers.
>> 
>> This is just code refactoring. Known-answer regression test for the internal JSSE HKDF impl is removed as the test vectors are already covered by the HKDF impl in SunJCE provider.
>> 
>> Thanks in advance for the review~
>
> Valerie Peng has updated the pull request incrementally with one additional commit since the last revision:
> 
>   Address review feedbacks from Brad.

Marked as reviewed by wetmore (Reviewer).

You're probably good to go, but might check with Weijun/Sean/DJ in case there's anything last minute.

src/java.base/share/classes/sun/security/util/KeyUtil.java line 451:

> 449:                 || alg.equalsIgnoreCase("Generic");
> 450:     }
> 451: 

As you know, I've been working on the [TLS Exporters change]( https://github.com/openjdk/jdk/pull/24976) which will use the same KDF APIs.  I've already updated that to use your style.  

Looks like I've now got one more thing to change!  ;)

-------------

PR Review: https://git.openjdk.org/jdk/pull/24393#pullrequestreview-2830088116
PR Comment: https://git.openjdk.org/jdk/pull/24393#issuecomment-2868234417
PR Review Comment: https://git.openjdk.org/jdk/pull/24393#discussion_r2082762131