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Enable obtaining certain DRBG params without a lock
Even if a DRBG has locking enabled on it, there are certain parameters which are still safe to obtain even without a lock. The max_request value is constant for all our DRBGs. The reseed_counter does not matter if we get it wrong - so it is safe to avoid the lock. So if all we are reading are those parameters then we take no lock at all. Partially fixes #20286 Reviewed-by: Tomas Mraz <tomas@openssl.org> Reviewed-by: Todd Short <todd.short@me.com> Reviewed-by: Paul Dale <pauli@openssl.org> (Merged from #20970)
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