RFR: 8267125: AES Galois CounterMode (GCM) interleaved implementation using AVX512 + VAES instructions [v7]

[Valerie Peng]

On Wed, 4 Aug 2021 02:24:05 GMT, Smita Kamath <svkamath at openjdk.org> wrote:

>> I would like to submit AES-GCM optimization for x86_64 architectures supporting AVX3+VAES (Evex encoded AES). This optimization interleaves AES and GHASH operations.
>> Performance gain of ~1.5x - 2x for message sizes 8k and above.
>
> Smita Kamath has updated the pull request incrementally with five additional commits since the last revision:
> 
>  - Merge branch 'aes-gcm' of github.com:smita-kamath/jdk into aes-gcm
>  - Updates, comment and variable cleanup
>  - merge rest
>  - merge
>  - fixes and code comments

src/java.base/share/classes/com/sun/crypto/provider/GaloisCounterMode.java line 1648:

> 1646: 
> 1647:             ghash.doFinal(in, inOfs, inLen);
> 1648:             return len + gctr.doFinal(in, inOfs, inLen, out, outOfs);

Why not just keep "return len + op.doFinal(in, inOfs, inLen, out, outOfs);"?

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PR: https://git.openjdk.java.net/jdk/pull/4019