Hands-On Spring Security 5 for Reactive Applications

Setting up LoginModule

LoginModule is responsible for authenticating a user. We will be creating our own LoginModule named JaasLoginModule and then implementing the login method. Being a sample application, our login logic is quite trivial. The LoginModule interface has to be implemented for you to write your own custom login module.

Create a class, JaasLoginModule.java (which implements LoginModule), and implement all the methods. In this class, we will be focusing on two important methods. In the initialize method, we get all the necessary information, such as username/password/subject, that is stored as field variables to be used in our main login method:

// Gather information and then use this in the login method@Overridepublic void initialize(Subject ...