RFR: 8347289: HKDF delayed provider selection failed with non-extractable PRK

[Kevin Driver]

On Wed, 8 Jan 2025 18:43:30 GMT, Weijun Wang <weijun at openjdk.org> wrote:

> A non-extractable PRK in HKDF Expand-Only is an invalid input, not an internal error.

src/java.base/share/classes/com/sun/crypto/provider/HKDFKeyDerivation.java line 183:

> 181:             // set this value in the "if"
> 182:             if ((pseudoRandomKey = anExpand.prk().getEncoded()) == null) {
> 183:                 throw new InvalidAlgorithmParameterException(

My only question here is whether the `Expand` could be created without a PRK for any other reason besides it being non-extractable. If we think so (even if it's just user-error), then perhaps the wording of the message for the IAPE should be revised from the currently proposed text.

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PR Review Comment: https://git.openjdk.org/jdk/pull/22976#discussion_r1907691518