PHP

How to integrate phpCAS in Laravel

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I would like to share you how to integrate phpCAS in Laravel. As you know, Jasig CAS is a Single-Sign-On System. If you want to connect to Jasig CAS from your system (that is wrote by PHP), you use phpCAS Library

Work hard in Silence, Let Success make the noise

Work hard in Silence, Let Success make the noise

To know how to install a Jasig CAS server, please see:  https://sonnguyen.ws/install-jasig-cas-ubuntu-14-04/

Step 1:  Download phpCAS Library and locate it in app/library directory

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cd app/library
git clone https://github.com/Jasig/phpCAS.git

Step 2: Create CAS Authentication Provider

We create file CasAuthProvider.php

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mkdir app/cas
cd app/cas
vi CasAuthProvider.php

Add source code to file:

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<?php namespace cas;
 
use Illuminate\Auth\GenericUser;
use Illuminate\Auth\UserInterface;
use Illuminate\Auth\UserProviderInterface;
 
class CasAuthProvider implements UserProviderInterface
{
    /**
     * Retrieve a user by their unique identifier.
     *
     * @param  mixed  $id
     * @return \Illuminate\Auth\UserInterface|null
     */
    public function retrieveById($id)
    {
        return $this->casUser();
    }
 
    /**
     * Retrieve a user by the given credentials.
     *
     * @param  array  $credentials
     * @return \Illuminate\Auth\UserInterface|null
     */
    public function retrieveByCredentials(array $credentials)
    {
        return $this->casUser();
    }
 
    /**
     * Validate a user against the given credentials.
     *
     * @param  \Illuminate\Auth\UserInterface  $user
     * @param  array  $credentials
     * @return bool
     */
    public function validateCredentials(UserInterface $user, array $credentials)
    {
        return true;
    }
 
    protected function casUser()
    {
        $cas_host = \Config::get('app.cas_host');
        $cas_context = \Config::get('app.cas_context');
        $cas_port = \Config::get('app.cas_port');
        \phpCAS::setDebug();
        \phpCAS::client(CAS_VERSION_2_0, $cas_host, $cas_port, $cas_context);
        \phpCAS::setNoCasServerValidation();
 
        if (\phpCAS::isAuthenticated())
        {
            $attributes = array(
                'id' => \phpCAS::getUser(),
                'name' => \phpCAS::getUser()
            );
            return new GenericUser($attributes);
        }
        else
        {
            \phpCAS::setServerURL(\Config::get('app.url'));
            \phpCAS::forceAuthentication();
        }
        return null;
    }
 
    /**
     * Needed by Laravel 4.1.26 and above
     */
    public function retrieveByToken($identifier, $token)
    {
        return new \Exception('not implemented');
    }
 
    /**
     * Needed by Laravel 4.1.26 and above
     */
    public function updateRememberToken(UserInterface $user, $token)
    {
        return new \Exception('not implemented');
    }
}
?>

Please make note that, you have to add  cas_host, cas_context, cas_port to app/config/app.php file

Step 3: Adding new provider to Laravel

Edit app/start/global.php file by adding code:

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Auth::extend('cas', function($app)
{
    return new cas\CasAuthProvider;
});

Step 4: Adding phpCAS library, new provider to Laravel Autoload

Open composer.json located at Laravel Root Directory and add app/library/phpCAS, app/cas:

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    "autoload": {
        "classmap": [
            "app/commands",
            "app/controllers",
            "app/models",
            "app/library",
            "app/library/phpCAS",
            "app/cas",
            "app/database/migrations",
            "app/database/seeds",
            "app/tests/TestCase.php"
        ]
    },

Dump new Laravel Autoload file:

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php artisan dump-autoload

Step 5: Finally, create route and controller for login action

In app/routes.php file add:

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Route::get('/login', array('as' => 'login', 'uses' => '[email protected]'));
Route::post('/login', array('as' => 'login', 'uses' => '[email protected]'));

In app/controllers/Admin.php add:

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    function login()
    {
        $message_error = "";
        if(Auth::check())
            // Redirect to link after login
        else
        {
            if (Auth::attempt(array()))
            {
                // Redirect to link after login
            }
            // Redirect to un-logged in page
        }
    }

 

 

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Nguyen Sy Thanh Son

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