Basic CAS (SSO) authenticator for Symfony 3 and 4

This bundle provides a -very- basic CAS (http://jasig.github.io/cas/4.1.x/index.html) authentication client for Symfony 3 and 4.

Install the library via Composer by running the following command:

composer require prayno/casauth-bundle

Next, enable the bundle in your app/AppKernel.php file:

<?php
// app/AppKernel.php

public function registerBundles()
{
    $bundles = array(
        // ...
        new PRayno\CasAuthBundle\PRaynoCasAuthBundle(),
        // ...
    );
}

In config.yml (Symfony 3) or config/packages/p_rayno_cas_auth.yaml (create this file in Symfony 4), add these settings :

p_rayno_cas_auth:
    server_login_url: https://mycasserver/cas/
    server_validation_url: https://mycasserver/cas/serviceValidate
    server_logout_url: https://mycasserver/cas/logout
    xml_namespace: cas
    options:[] see http://docs.guzzlephp.org/en/latest/request-options.html

Note : the xml_namespace and options parameters are optionals

Modify your security.yml with the following values (the provider in the following settings should not be used as it's just a very basic example ; in production, create your own UserProvider and add its service name in providers:cas:id) :

security:
    providers:
        cas:
          id: prayno.cas_user_provider

    firewalls:
        dev:
            pattern: ^/(_(profiler|wdt)|css|images|js)/
            security: false
        main:
            anonymous: ~
            logout: ~
            guard:
                authenticators:
                    - prayno.cas_authenticator

    access_control:
        - { path: ^/, roles: ROLE_USER }

And voila ! Your secured route should redirect you to your CAS login page which should authenticate you.

If you want your users to logout from the remote CAS server when logging out from your app, you should apply the following settings :

security.yaml:

# ...
    firewalls:
        # ...
        main:
          # ...
          logout:
            path: /logout
            success_handler: PRayno\CasAuthBundle\Event\LogoutSuccessHandler

services.yaml

# ...
services:
    # ...
    PRayno\CasAuthBundle\Event\LogoutSuccessHandler:
        arguments:
            $logoutUrl: "%cas_logout_url%"

Of course, you must set a "cas_logout_url" parameter in your app (eg. https://my_remote_cas_server/logout)

Don't forget to define a /logout route in your app