RFR: 8258915: Temporary buffer cleanup [v5]

[Valerie Peng]

On Thu, 28 Jan 2021 16:12:58 GMT, Weijun Wang <weijun at openjdk.org> wrote:

>> Clean up temporary byte array, char array, and keyspec around keys and passwords.
>> 
>> No new regression test.
>
> Weijun Wang has updated the pull request incrementally with one additional commit since the last revision:
> 
>   cleanups for key generations

src/java.base/share/classes/com/sun/crypto/provider/AESCrypt.java line 690:

> 688:         limit = ROUNDS*4;
> 689: 
> 690:         // store the expanded sub keys into 'sessionK'

Update the comment with "erase the previous values in sessionK or other similar wording.

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PR: https://git.openjdk.java.net/jdk/pull/2070