RFR: 8331008: Implement JEP 478: Key Derivation Function API (Preview) [v8]

[Sean Mullan]

On Thu, 25 Jul 2024 19:29:05 GMT, Kevin Driver <kdriver at openjdk.org> wrote:

>> Introduce an API for Key Derivation Functions (KDFs), which are cryptographic algorithms for deriving additional keys from a secret key and other data. See [JEP 478](https://openjdk.org/jeps/478).
>> 
>> Work was begun in [another PR](https://github.com/openjdk/jdk/pull/18924).
>
> Kevin Driver has updated the pull request incrementally with two additional commits since the last revision:
> 
>  - update code snippet type in KDF
>  - add preview annotation to KDFParameters

src/java.base/share/classes/javax/crypto/KDF.java line 70:

> 68:  * The {@code deriveKey} and {@code deriveData} methods of {@code KDF} objects
> 69:  * must be thread-safe. That is, multiple threads may concurrently invoke these
> 70:  * methods on a single {@code KDF} object with no ill effects.

These sentences (and similar ones in KDFSpi) should be removed now.

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

PR Review Comment: https://git.openjdk.org/jdk/pull/20301#discussion_r1693386636