SSL Java java.io.IOException: Invalid keystore format

Question

I am testing SSL in java with SSLServerSocket and other classes in the java.ssl package. When I run the following code, I get the exception java.io.IOException: Invalid keys

Answer 1

I had exactly the same issue. Indeed, the keystore file was invalid and not related to the JDK//JRE version. The problem in my case was caused by Maven. I was using the following option in my pom file:

        
            src/main/resources
            true
        
    

The "true" value in the filtering was messing with the key file. Therefore, the keyfile that was available in my classpath when Spring run was not exactly the same I had under my directory "src/main/resources" and that caused the Invalid Keystore Format exception. When I tested with keytool I was using the one under the "resources" folder so that was misleading the real issue.

Solving the issue: in your pom.xml file, change the value for "filtering" to "false". Another way of solving the issue was to specify explicitly the location of the keystore in the application.properties file. So instead of:

server.ssl.key-store: classpath:keystore.jks

I used

server.ssl.key-store: keystore/keystore.jks