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