TLS 1.3 changed the way it generates the FFDHE shared secret. In TLS 1.2, the leading zeroes in the shared secret were stripped, and in TLS 1.3 the leading zeroes are preserved.
Thanks to the recent work in [JDK-8189441](https://bugs.openjdk.org/browse/JDK-8189441), we now have a new algorithm name `Generic` that can be used to generate a shared secret with the leading zeroes preserved. This PR changes the TLS 1.3 handshake to use the new algorithm name. It also fixes a bug in PKCS11 Generic key derivation, and updates the existing tests to verify that the Generic algorithm doesn't strip leading zeroes. I didn't add any tests to verify the correctness of the handshake. This can be verified using tlsfuzzer, see JBS for details. Tier1-3 tests continue to pass. The `TestLeadingZeroesP11.java` test fails before the `P11KeyAgreement.java` changes, passes after. ------------- Commit messages: - Update copyright, add bug IDs - Fix PKCS11 DH key derivation - Keep leading zeroes in tls13 Changes: https://git.openjdk.org/jdk/pull/27343/files Webrev: https://webrevs.openjdk.org/?repo=jdk&pr=27343&range=00 Issue: https://bugs.openjdk.org/browse/JDK-8328046 Stats: 86 lines in 4 files changed: 51 ins; 24 del; 11 mod Patch: https://git.openjdk.org/jdk/pull/27343.diff Fetch: git fetch https://git.openjdk.org/jdk.git pull/27343/head:pull/27343 PR: https://git.openjdk.org/jdk/pull/27343
