RFR: 8331008: Implement JEP 478: Key Derivation Function API (Preview) [v15]

[Weijun Wang]

On Wed, 28 Aug 2024 20:37:19 GMT, Kevin Driver <kdriver at openjdk.org> wrote:

>> The way this is worded it is part of the API specification, so I would expect `IllegalArgumentException` to be thrown if the length is less than 255 * HMAC length.  But as I understand, only the HKDF impl can do that. I would change this to only say the length must be greater than 0, and add an "Implementation Note" that says HKDF implementations will enforce that the length is less than 255 * HMAC length.
>
> Resolved in https://github.com/openjdk/jdk/pull/20301/commits/a65dc9da044297c313e02d698255bad915dc0a10.

Thanks for the update. The `prk` one also needs to be mentioned. I should have added a comment yesterday.

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PR Review Comment: https://git.openjdk.org/jdk/pull/20301#discussion_r1736305955