The demo certificates delivered with WebLogic and used by the PIA are stored in the file:

$PS_CFG_HOME/webserv/<domain>/security/DemoIdentity.jks

To access the keystore, you can use keytool which is included with the JDK:

keytool -list -keytore $PS_CFG_HOME/webserv/<domain>/security/DemoIdentity.jks

Property Value
Trust store location $ORACLE_HOME/bea/wlserver/server/lib/DemoTrust.jks
Trust store password DemoTrustKeyStorePassPhrase
Key store location $PS_CFG_HOME/webserv/<domain>/security/DemoIdentity.jks
Key store password DemoIdentityKeyStorePassPhrase
Private key password DemoIdentityPassPhrase

This information is from G’s Blog