• Create a pkcs12 certificate, and copy it to $JBOSS_HOME/server/default/conf
• Edit the file $JBOSS_HOME/server/default/deploy/jbossweb-tomcat55.sar/server.xml

You must have something like :

      <Connector port="8443" address="${jboss.bind.address}"
           maxThreads="100" strategy="ms" maxHttpHeaderSize="8192"
           emptySessionPath="true"
           scheme="https" secure="true" clientAuth="false"
           keystoreFile="${jboss.server.home.dir}/conf/jboss-cert.p12" keystoreType="PKCS12"
           keystorePass="exportPassword" sslProtocol = "TLS" />

Note, I used my own CA tool to create the pkcs12 cert file.