RFR: 8314323: Implement JEP 527: TLS 1.3 Hybrid Key Exchange [v19]

Sun Dec 7 03:36:45 UTC 2025

> Implement hybrid key exchange support for TLS 1.3 by adding three post-quantum hybrid named groups: X25519MLKEM768, SecP256r1MLKEM768, and SecP384r1MLKEM1024.
> Please see [JEP 527](https://openjdk.org/jeps/527) for details about this change.

Hai-May Chao has updated the pull request incrementally with one additional commit since the last revision:

  Remove len check from encapsulate

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Changes:
  - all: https://git.openjdk.org/jdk/pull/27614/files
  - new: https://git.openjdk.org/jdk/pull/27614/files/787f0042..02eab2f2

Webrevs:
 - full: https://webrevs.openjdk.org/?repo=jdk&pr=27614&range=18
 - incr: https://webrevs.openjdk.org/?repo=jdk&pr=27614&range=17-18

  Stats: 15 lines in 1 file changed: 0 ins; 14 del; 1 mod
  Patch: https://git.openjdk.org/jdk/pull/27614.diff
  Fetch: git fetch https://git.openjdk.org/jdk.git pull/27614/head:pull/27614

PR: https://git.openjdk.org/jdk/pull/27614