What is Keystore ?
A Java KeyStore (JKS) is a repository of security certificates – either authorization certificates or public key certificates – used for instance in SSL encryption. In Oracle WebLogic Server, a file with extension jks serves as keystore.
What is DemoTrust.jks ?
DemoTrust.jks Contains a list of certificate authorities trusted by WebLogic Server. This keystore establishes trust for WebLogic Server.
How to add import a certificate to DemoTrust.jks Keystore ?
keytool -import -alias <certificate name> -file <certificate path> -keystore <DemoTrust.jks path>
Example : Execute below command in CMD in Windows
keytool -import -alias FM-CA -file C:\libs\FM\FM-CA.cer -keystore C:\Oracle\Middleware\wlserver_10.3\server\lib\DemoTrust.jks
How to see existing certificates in DemoTrust.jks ?
keytool -list -v -keystore C:\Oracle\Middleware\wlserver_10.3\server\lib\DemoTrust.jks
Here is the default password for DemoTrust.jks : DemoTrustKeyStorePassPhrase
For More Info : http://docs.oracle.com/cd/E19118-01/n1.sprovsys51/819-1655/fapsf/index.html