Unable to create SSL connection if expired certificate chain used

Reproducer:

• Server secured by certificate chain, it means Certificate is signed with Intermediate CA which is signed by root CA.
• Server certificate is expired
• Client has Intermediate CA in Elytron truststore
• SSL handshake fails using Elytron client ssl context:

  18:27:54,540 INFO  [stdout] (default task-1) default task-1, SEND TLSv1 ALERT:  fatal, description = certificate_unknown
  18:27:54,540 INFO  [stdout] (default task-1) default task-1, WRITE: TLSv1 Alert, length = 2
  18:27:54,540 INFO  [stdout] (default task-1) [Raw write]: length = 7
  18:27:54,540 INFO  [stdout] (default task-1) 0000: 15 03 01 00 02 02 2E                               .......
  18:27:54,541 INFO  [stdout] (default task-1) default task-1, called closeSocket()
  18:27:54,541 INFO  [stdout] (default task-1) default task-1, handling exception: javax.net.ssl.SSLHandshakeException: java.security.cert.CertificateExpiredException: NotAfter: Sat Dec 16 10:49:56 CET 2017
  

  Full SSL handshake log is in attached ssl_handshake_CA.log

• If I put expired certificate itself into truststore SSL handshake pass, although warning is logged.

  18:35:28,648 WARN  [org.wildfly.extension.elytron] (MSC service thread 1-8) WFLYELY00024: Certificate [cn=rhds05.mw.lab.eng.bos.redhat.com, ou=engineering operations, o="red hat, inc.", st=north carolina, c=us] in KeyStore is not valid: java.security.cert.CertificateExpiredException: NotAfter: Sat Dec 16 12:39:06 CET 2017
  	at sun.security.x509.CertificateValidity.valid(CertificateValidity.java:274)
  	at sun.security.x509.X509CertImpl.checkValidity(X509CertImpl.java:629)
  	at sun.security.x509.X509CertImpl.checkValidity(X509CertImpl.java:602)
  	at org.wildfly.extension.elytron.KeyStoreService.checkCertificatesValidity(KeyStoreService.java:177)
  	at org.wildfly.extension.elytron.KeyStoreService.start(KeyStoreService.java:140)
  	at org.jboss.msc.service.ServiceControllerImpl$StartTask.startService(ServiceControllerImpl.java:1701)
  	at org.jboss.msc.service.ServiceControllerImpl$StartTask.execute(ServiceControllerImpl.java:1680)
  	at org.jboss.msc.service.ServiceControllerImpl$ControllerTask.run(ServiceControllerImpl.java:1527)
  	at org.jboss.threads.EnhancedQueueExecutor.safeRun(EnhancedQueueExecutor.java:1979)
  	at org.jboss.threads.EnhancedQueueExecutor$ThreadBody.doRunTask(EnhancedQueueExecutor.java:1481)
  	at org.jboss.threads.EnhancedQueueExecutor$ThreadBody.run(EnhancedQueueExecutor.java:1374)
  	at java.lang.Thread.run(Thread.java:748)
  

  Full SSL handshake log is in attached ssl_handshake_certificate.log

So behaviour in these 2 cases is inconsistent. I think we have agreed before we let pass SSL handshake with expired certificate but warn about it in log [1].

[1] https://issues.jboss.org/browse/JBEAP-6157