pac4j / pac4j   4.3.0

Apache License 2.0 Website GitHub

Security engine for Java (authentication, authorization, multi frameworks): OAuth, CAS, SAML, OpenID Connect, LDAP, JWT...

pac4j is an easy and powerful security framework for Java to authenticate users, get their profiles and manage authorizations in order to secure web applications and web services.

It provides a comprehensive set of concepts and components. It is based on JDK 17 (v6.x), JDK 11 (v5.x) or JDK 8 (v4.x) and licensed under the Apache 2 license. It is available for most frameworks/tools and supports most authentication/authorization mechanisms.

Available implementations (Get started by clicking on your framework):

JEESpring Web MVC (Spring Boot)Spring Webflux (Spring Boot)Apache ShiroSpring Security (Spring Boot)

CAS serverSyncopeApache Knox

Play 2.xVertxSpark JavaRatpackJAX-RSDropwizard

JavalinPippoUndertowLagomAkka HTTPJooby

Authentication mechanisms:

OAuth (Facebook, Twitter, Google...) - SAML - CAS - OpenID Connect - HTTP - Google App Engine - Kerberos (SPNEGO/Negotiate)

LDAP - SQL - JWT - MongoDB - CouchDB - IP address - REST API

Authorization mechanisms:

Roles - Anonymous/remember-me/(fully) authenticated - Profile type, attribute

CORS - CSRF - Security headers - IP address, HTTP method


The latest released version is the Maven Central, available in the Maven central repository. The next version is under development.

Read the documentation for more information.

Need help?

You can use the mailing lists or the commercial support.

Supported by

CAS in the cloud The CAS and pac4j consulting company