RFR: 8353578: Refactor existing usage of internal HKDF impl to use the KDF API [v2]

[Sean Mullan]

On Sat, 5 Apr 2025 19:12:23 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:
> 
>   added default deriveData method to SSLKeyDerivation interface and
>   refactored code to remove unused AlgorithmParameterSpec argument.

src/java.base/share/classes/sun/security/ssl/SSLKeyDerivation.java line 35:

> 33:     SecretKey deriveKey(String purpose) throws IOException;
> 34: 
> 35:     default byte[] deriveData(String purpose) throws IOException {

This is an internal interface, so I don't think you need to make this a `default` method.

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PR Review Comment: https://git.openjdk.org/jdk/pull/24393#discussion_r2031630692