RFR: 8325448: Hybrid Public Key Encryption [v19]

[Weijun Wang]

> Implement HPKE as defined in https://datatracker.ietf.org/doc/rfc9180/.
> ![HPKEParameterSpec · 11 54 · 04-21](https://github.com/user-attachments/assets/da309585-db51-40d6-b291-3d38040d6292)

Weijun Wang has updated the pull request with a new target base due to a merge or a rebase. The pull request now contains 32 commits:

 - merge
 - engineGetBlockSize and engineGetOutputSize returns 0 when not initialized
 - change argument order for exporters, reject null exporter_context
 - Merge branch 'master' into 8325448
 - address Sean's comments
 - toString, exportData, spec in HPKEParameters must have algorithm identifiers specified
 - put encapsulation in params from getParameters
 - receiver must specify all algorithm identifiers
 - Merge branch 'master' into 8325448
 - remove unused imports
 - ... and 22 more: https://git.openjdk.org/jdk/compare/62d155e8...f819de2e

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Changes: https://git.openjdk.org/jdk/pull/18411/files
  Webrev: https://webrevs.openjdk.org/?repo=jdk&pr=18411&range=18
  Stats: 2168 lines in 12 files changed: 1971 ins; 74 del; 123 mod
  Patch: https://git.openjdk.org/jdk/pull/18411.diff
  Fetch: git fetch https://git.openjdk.org/jdk.git pull/18411/head:pull/18411

PR: https://git.openjdk.org/jdk/pull/18411