RFR: 8368073: PKCS11 HKDF can't use byte array IKM in FIPS mode

[Valerie Peng]

On Fri, 19 Sep 2025 08:32:41 GMT, Daniel Jeliński <djelinski at openjdk.org> wrote:

> Enable HDKF to work with providers that do not allow secret keys to be created from arbitrary data.
> 
> This permits the TLS 1.3 handshake to complete with SunPKCS11 provider backed by NSS in FIPS mode.
> 
> I added a TLS 1.3 test case to an existing test. The new test passes with the HKDF changes, fails without them. Other tier1-3 tests continue to pass.

src/jdk.crypto.cryptoki/share/classes/sun/security/pkcs11/P11HKDF.java line 268:

> 266:     }
> 267: 
> 268:     private long convertKeyToData(byte[] keyBytes) {

Check `keyBytes` being non-null?

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PR Review Comment: https://git.openjdk.org/jdk/pull/27384#discussion_r2370666449