[jdk21u-dev] RFR: 8347596: Update HSS/LMS public key encoding

Thu Apr 24 15:03:19 UTC 2025

I backport this for parity with 21.0.8-oracle.

Omitted the change to KeyUtil.java.
The code edited by the original change was added to KeyUtil by https://bugs.openjdk.org/browse/JDK-8302233 "HSS/LMS: keytool and jarsigner changes".

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Commit messages:
 - Backport 0ee6ba9c4c998baeb733363d00db138864f49406

Changes: https://git.openjdk.org/jdk21u-dev/pull/1704/files
  Webrev: https://webrevs.openjdk.org/?repo=jdk21u-dev&pr=1704&range=00
  Issue: https://bugs.openjdk.org/browse/JDK-8347596
  Stats: 41 lines in 2 files changed: 19 ins; 10 del; 12 mod
  Patch: https://git.openjdk.org/jdk21u-dev/pull/1704.diff
  Fetch: git fetch https://git.openjdk.org/jdk21u-dev.git pull/1704/head:pull/1704

PR: https://git.openjdk.org/jdk21u-dev/pull/1704