Is it possible to purchase JAAS LoginModule for RACF separately and run it on another platform?
No, the JAAS LoginModule (OS390LoginModule) for RACF cannot be purchased separately. JAAS modules are only available in the JAAS component of the Java for z/OS SDK. The OS390LoginModule for RACF cannot be run on any other platform, as the support is compiled specifically for the z/OS platform. Also, JAAS, as shipped in the Java SDK, contains no support for remote authentication using the OS390LoginModule on z/OS.