Installation

This package has a Symfony Flex recipe that will install configuration files for you.

Default configuration files will be copied in the dev environment.

Step 1

The recommended way to install it is with Composer :

composer require ecphp/cas-bundle

Warning

If you use API Platform and Symfony < 5.2, then it’s possible that some URLs contains parameters with a dot inside. By default, Symfony mangles url parameters having dot with an underscore, which can lead in huge inconsistencies if you heavily rely on query parameters like in API Platform.

In order to fix that issue, the optional package loophp/unaltered-psr-http-message-bridge-bundle can be installed.

composer require loophp/unaltered-psr-http-message-bridge-bundle

Step 2

This is the crucial part of your application’s security.

Edit the security settings of your application, usually in config/packages/security.yaml, as such:

security:
    enable_authenticator_manager: true

    firewalls:
        dev:
            pattern: ^/(_(profiler|wdt)|css|images|js)/
            security: false
        # this firewall is going to require to login for the /secured path
        secured:
            provider: cas
            pattern: ^/secured
            custom_authenticator: EcPhp\CasBundle\Security\CasAuthenticator
            form_login:
                check_path: cas_bundle_login
                login_path: cas_bundle_login
            entry_point: EcPhp\CasBundle\Security\CasAuthenticator
        main:
            # lazy: true
            provider: users_in_memory

            # activate different ways to authenticate
            # https://symfony.com/doc/current/security.html#firewalls-authentication

            # https://symfony.com/doc/current/security/impersonating_user.html
            # switch_user: true

    # Easy way to control access for large sections of your site
    # Note: Only the *first* access control that matches will be used
    access_control:
        # in case you want to put the entire application behind a secured firewall, you'll need
        # to give public assess to the login area of the cas bundle like below
        - { path: ^/cas, roles: PUBLIC_ACCESS }
        - { path: ^/secured, roles: ROLE_CAS_AUTHENTICATED }

This configuration example will trigger the authentication on paths starting with /secured, therefore make sure that at least such paths exists.

Feel free to change these configuration to fits your need. Have a look at the Symfony documentation about security.

Step 3

The CAS protocol requires HTTPS on both side (client and server) in order to communicate.

Whilst it is not possible to configure the behavior of the CAS server, it is possible to configure the HTTP client in use in this bundle in order to relax the requirement and to disable SSL checks when communicating from the client to the server.

Warning

Keep in mind that the following is only for development setup, not for production.

On step 3, while copying the configuration files, the file config/packages/dev/cas_framework.yaml is copied over. That file is useful when developing, it will disable some verifications required when using SSL protocol.

Those particular settings are specific to the default HTTP client that is installed, which is symfony/http-client.

The User-Agent HTTP header used on the dev environment is SymfonyCasBundle. Feel free to customize it or remove it when switching to another environment.

If you plan to change the HTTP client, those settings will most probably need to be updated accordingly.

Step 4

The default configuration of this bundle comes with a configuration for authenticating with a real CAS server setup for testing and demo purposes at https://casserver.herokuapp.com/cas/.

Warning

It is important to note that this is the Apereo official public demo cas server, used by the project for basic showcases. They may go up and down as the project needs without notice, see this page for further information.

The credentials to use for authentication are the following:

• User: casuser
• Password: Mellon

Modifying the configuration file is key in this bundle and requires some understanding of the CAS protocol. See more on the dedicated Configuration page for that.

The aforementioned server provided by Apereo does not support Proxy authentication.

If you prefer using a local CAS server, you can choose to build your own using the tool you prefer. The quickest solution for a working CAS server on any platform is this Docker project.