Detect default keystore change

In Java 11 the default keystore was updated from JKS to PKCS12. As a result, applications relying on KeyStore.getDefaultType() may encounter issues after migrating, unless their JKS keystore has been converted to PKCS12.

This rule identifies and flags the use of the KeyStore.getDefaultType() method. If developers need to maintain compatibility with JKS, they can manually specify the keystore type as "jks" in their applications.

For example consider the following code snippet:

KeyStore keystore = KeyStore.getInstance(KeyStore.getDefaultType());

Instead of relying on the default keystore type value returned by KeyStore.getDefaultType(), in Java11 users can explicitely specify "jks" like this:

KeyStore keystore = KeyStore.getInstance("jks");

This rule has an automated fix that returns "jks" when KeyStore.getDefaultType()method is called.

Copy the custom configuration to your application build file to enable the fix automation.

For more information, see the following resources: