What is jaas?

JAAS stands for Java Authentication and Authorization Service. It is a set of APIs and a framework that provides a way for Java applications to authenticate and authorize users. JAAS provides a pluggable architecture that supports different types of authentication technologies and can be integrated with different security policies and authorization models.

JAAS includes a LoginModule interface, which defines the methods used to authenticate a user. JAAS also includes a Subject class, which represents the user and their associated credentials and permissions. JAAS can be used in a variety of scenarios, such as securing web applications, desktop applications, and services.

JAAS is often used in conjunction with other security frameworks in Java, such as the Java Secure Socket Extension (JSSE) and Java Authentication Service Provider Interface for Pluggable Authentication Modules (JASPIC).