On Tue, 16 Sep 2025 14:58:05 GMT, Weijun Wang <[email protected]> wrote:

>> Implement HPKE as defined in https://datatracker.ietf.org/doc/rfc9180/.
>> <img alt="image" 
>> src="https://github.com/user-attachments/assets/df3b454d-2161-4036-9930-c4f84d887b31";
>>  />
>
> Weijun Wang has updated the pull request incrementally with one additional 
> commit since the last revision:
> 
>   more key checks; some small spec change

src/java.base/share/classes/com/sun/crypto/provider/DHKEM.java line 31:

> 29: import java.io.Serial;
> 30: import java.math.BigInteger;
> 31: import java.security.AsymmetricKey;

Since your original putback used import java.security.* and others below, was 
it your intent to specify 11 java.security class instead of using a wildcard, 
or did the IDE do this?

src/java.base/share/classes/com/sun/crypto/provider/HPKE.java line 225:

> 223:     }
> 224: 
> 225:     //@Override

Do you need this comment here and the next method below?

src/java.base/share/classes/com/sun/crypto/provider/HPKE.java line 452:

> 450:         private static void checkMatch(boolean inSpec, AsymmetricKey k, 
> int kem_id)
> 451:                 throws InvalidKeyException, 
> InvalidAlgorithmParameterException {
> 452:             var p = k.getParams();

nit: It looks like you could have used a `switch (k.params())` here.

src/java.base/share/classes/com/sun/crypto/provider/HPKE.java line 499:

> 497:                     DHKEM.I2OSP(params.kdf_id(), 2),
> 498:                     DHKEM.I2OSP(params.aead_id(), 2));
> 499:             kdfAlg = switch (params.kdf_id()) {

I think it would be more efficient to have one switch that sets both values 
instead of two identical switches to set each.  Similar to what you did in 
`AEAD()`.

-------------

PR Review Comment: https://git.openjdk.org/jdk/pull/18411#discussion_r2395233573
PR Review Comment: https://git.openjdk.org/jdk/pull/18411#discussion_r2402601153
PR Review Comment: https://git.openjdk.org/jdk/pull/18411#discussion_r2402807458
PR Review Comment: https://git.openjdk.org/jdk/pull/18411#discussion_r2402688988

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