Check private key

[ZainabF92]

Fixes: eclipse-openj9/openj9#15413

Signed-off-by: Zainab Fatmi zainab@ibm.com

[keithc-ca]

jenkins test extended.openjdk xlinux jdk18

[pshipton]

The original version of this change was ported to jdk19+. Does it also need to be backported? The ECDSAPrvGreaterThanOrder.java test only exists in jdk18+, but the original ECDH key agreement feature was added to jdk8+ and may have the same problem.

[ZainabF92]

The method ECUtil.checkPrivateKey does not exist prior to jdk18

[pshipton]

For the record it was introduced via ca068f817e21fb.

[pshipton]

jenkins compile amac jdk18

[pshipton]

extended.openjdk takes a while to run, and the machines aren't setup up correctly to pass all the testing. In particular there is jdk_nio Datagram testing which is running and timing out.

I've run a grinder on all the openjdk sanity/extended testing that looks security related.
testList TESTLIST=jdk_security1,jdk_security2,jdk_security3,jdk_security4,jdk_security_infra,jdk11_tier1_cipher
https://openj9-jenkins.osuosl.org/view/Test/job/Grinder/1130

ECKeyCheck.java is still failing but that is a different known problem eclipse-openj9/openj9#15412
ECDSAPrvGreaterThanOrder.java is passing as expected with this fix.