UNDERTOW-1791: Migrate from getPeerCertificateChain to getPeerCertificates #988
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Jira: https://issues.redhat.com/browse/UNDERTOW-1791
Java 15 runtimes default jsse SSLSession implementation throws an
UnsupportedOperationException when getPeerCertificateChain is called.
https://www.oracle.com/java/technologies/javase/15-relnote-issues.html#JDK-8241039
In this PR I have replaced uses of getPeerCertificateChain with getPeerCertificates, however I have not provided an implementation of sslsessioninfo.getPeerCertificateChain which delegates to getPeerCertificates and converts to the javax variant. It's unclear if that would be desirable.
It appears unlikely that there are cases in which getPeerCertificates produces different results, but it's possible a SSLSession implementation is incorrect in a way that causes this change to introduce failures. We could flag this behavior behind a property.