[crac] RFR: Reseed NativePRNG on checkpoint restore

[Alexey Bakhtin]

On Fri, 24 Dec 2021 06:37:17 GMT, Michael Bien <duke at openjdk.java.net> wrote:

>> NativePRNG should be re-seeded during checkpoint/restore because it uses SHA1PRNG secure random for additional seed. It is seeded at initialization, so it is not re-seeded automatically during checkpoint/restore
>> Also, the internal buffer should be cleared at the checkpoint.
>
> src/java.base/unix/classes/sun/security/provider/NativePRNG.java line 595:
> 
>> 593:             for(int i=0; i<nextBuffer.length; i++) {
>> 594:                 nextBuffer[i] = 0;
>> 595:             }
> 
> could use Arrays.fill

Yes. Thank you. I will update

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PR: https://git.openjdk.java.net/crac/pull/9