RFR: 8325448: Hybrid Public Key Encryption [v33]

[Weijun Wang]

On Mon, 25 Aug 2025 19:09:58 GMT, Sean Mullan <mullan at openjdk.org> wrote:

>> Weijun Wang has updated the pull request incrementally with one additional commit since the last revision:
>> 
>>   8325448: Hybrid Public Key Encryption
>
> src/java.base/share/classes/javax/crypto/spec/HPKEParameterSpec.java line 40:
> 
>> 38:  * This immutable class specifies the set of parameters used with a {@code Cipher} for the
>> 39:  * <a href="https://www.rfc-editor.org/info/rfc9180">Hybrid Public Key Encryption</a>
>> 40:  * (HPKE) algorithm. The <a href=
> 
> I think would be useful to add one or two (but no more) sentences describing HPKE and what it should be used for.

I've added

     * HPKE is a public key encryption scheme for encrypting
     * arbitrary-sized plaintexts to a receiver's public key. It combines a key
     * encapsulation mechanism (KEM), a key derivation function (KDF), and an
     * authenticated encryption with additional data (AEAD) cipher.

These are copied from [the Abstract of RFC 9180](https://www.rfc-editor.org/rfc/rfc9180.html#abstract) with a few tweaks.

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PR Review Comment: https://git.openjdk.org/jdk/pull/18411#discussion_r2301430760