[crac] RFR: Reseed NativePRNG on checkpoint restore

[Michael Bien]

On Thu, 23 Dec 2021 11:30:13 GMT, Alexey Bakhtin <abakhtin at openjdk.org> 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

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