How to avoid storing passwords in the clear for tomcat's server.xml Resource definition of a DataSource?

Question

The resource definition in tomcat\'s server.xml looks something like this...

Answer 1

Note:

You can use WinDPAPI to encrypt and decrypt data

public class MyDataSourceFactory extends DataSourceFactory{

private static WinDPAPI winDPAPI;

protected static final String DATA_SOURCE_FACTORY_PROP_PASSWORD = "password";

@Override
public Object getObjectInstance(Object obj, Name name, Context nameCtx, Hashtable environment) throws Exception{

    Reference ref = (Reference) obj;
    for (int i = 0; i < ref.size(); i++) {
        RefAddr ra = ref.get(i);
        if (ra.getType().equals(DATA_SOURCE_FACTORY_PROP_PASSWORD)) {

            if (ra.getContent() != null && ra.getContent().toString().length() > 0) {
                String pwd = getUnprotectedData(ra.getContent().toString());
                ref.remove(i);
                ref.add(i, new StringRefAddr(DATA_SOURCE_FACTORY_PROP_PASSWORD, pwd));
            }

            break;
        }
    }

    return super.getObjectInstance(obj, name, nameCtx, environment);
  }
}