JASIG CAS Authentication with Laravel Lumen

CAS.md

##JASIG CAS Authentication with Laravel Lumen

composer.json

require {
    "jasig/phpcas": "^1.3"
}

.env

CAS_HOST=login.gatech.edu
CAS_CONTEXT=/cas

app\Http\Middleware\AuthCASMiddleware.php

<?php

namespace App\Http\Middleware;

use Closure;
use phpCAS;

class AuthCASMiddleware
{


    /**
     * Handle an incoming request.
     *
     * @param  \Illuminate\Http\Request  $request
     * @param  \Closure  $next
     * @return mixed
     */
    public function handle($request, Closure $next)
    {
        $cas_config = array(
            'host' => getenv('CAS_HOST'),
            'context' => getenv('CAS_CONTEXT'),
        );

        phpCAS::client(CAS_VERSION_2_0, $cas_config['host'], 443, $cas_config['context']);
        phpCAS::setNoCasServerValidation();

        if ($request->has('logout')) {
            phpCAS::logout();
        } else if (phpCAS::isAuthenticated()) {
            return $next($request);
        } else {
            phpCAS::forceAuthentication();
        }
    }
}

bootstrap/app.php

Uncomment the array opening/closing, and insert this line as follows. This will force CAS authentication for all routes. This can be moved to $app->routeMiddleware if you want to only use it for certain routes. Just specify the middleware as documented in the Lumen docs.

$app->middleware([
    ...
    'App\Http\Middleware\AuthCASMiddleware::class',
    ...
]);

Get CAS Username

Put this function in your controller, then access the variable as seen in the example.

/**
     * Get current CAS logged-in user
     * @return bool|string GT Username if logged in, false if not
     */
    public function getCASUser() {
        if (phpCAS::isAuthenticated()) {
            return phpCAS::getUser();
        } else {
            return false;
        }
    }

Add this to your controller's return statement ->with("casUser",$this->getCASUser())

Then you can access it in a view with {{ (isset($casUser)) ? $casUser : "null" }} or just {{ $casUser }}

Out of curiosity what version of Lumen was this for?