PHP code example of slim / csrf

    
        
<?php
require_once('vendor/autoload.php');

/* Start to develop here. Best regards https://php-download.com/ */

    

slim / csrf example snippets

use DI\Container;
use Slim\Csrf\Guard;
use Slim\Factory\AppFactory;

er = new Container();
AppFactory::setContainer($container);

// Create App
$app = AppFactory::create();
$responseFactory = $app->getResponseFactory();

// Register Middleware On Container
$container->set('csrf', function () use ($responseFactory) {
    return new Guard($responseFactory);
});

// Register Middleware To Be Executed On All Routes
$app->add('csrf');

$app->get('/foo', function ($request, $response, $args) {
    // CSRF token name and value
    $csrf = $this->get('csrf');
    $nameKey = $csrf->getTokenNameKey();
    $valueKey = $csrf->getTokenValueKey();
    $name = $request->getAttribute($nameKey);
    $value = $request->getAttribute($valueKey);

    /*
       Render HTML form which POSTs to /bar with two hidden input fields for the
       name and value:
       <input type="hidden" name="<?= $nameKey 

use DI\Container;
use Slim\Csrf\Guard;
use Slim\Factory\AppFactory;

er = new Container();
AppFactory::setContainer($container);

// Create App
$app = AppFactory::create();
$responseFactory = $app->getResponseFactory();

// Register Middleware On Container
$container->set('csrf', function () use ($responseFactory) {
    return new Guard($responseFactory);
});

$app->get('/api/route',function ($request, $response, $args) {
    $csrf = $this->get('csrf');
    $nameKey = $csrf->getTokenNameKey();
    $valueKey = $csrf->getTokenValueKey();
    $name = $request->getAttribute($nameKey);
    $value = $request->getAttribute($valueKey);

    $tokenArray = [
        $nameKey => $name,
        $valueKey => $value
    ];
    
    return $response->write(json_encode($tokenArray));
})->add('csrf');

$app->post('/api/myEndPoint',function ($request, $response, $args) {
    //Do my Things Securely!
})->add('csrf');

$app->run();

use Slim\Csrf\Guard;
use Slim\Psr7\Factory\ResponseFactory;

// Start PHP session
session_start();

// Create Middleware
$responseFactory = new ResponseFactory(); // Note that you will need to import
$guard = new Guard($responseFactory);

// Generate new tokens
$csrfNameKey = $guard->getTokenNameKey();
$csrfValueKey = $guard->getTokenValueKey();
$keyPair = $guard->generateToken();

// Validate retrieved tokens
$guard->validateToken($_POST[$csrfNameKey], $_POST[$csrfValueKey]);

use Slim\Csrf\Guard;

class CsrfExtension extends \Twig\Extension\AbstractExtension implements \Twig\Extension\GlobalsInterface
{
    /**
     * @var Guard
     */
    protected $csrf;
    
    public function __construct(Guard $csrf)
    {
        $this->csrf = $csrf;
    }

    public function getGlobals()
    {
        // CSRF token name and value
        $csrfNameKey = $this->csrf->getTokenNameKey();
        $csrfValueKey = $this->csrf->getTokenValueKey();
        $csrfName = $this->csrf->getTokenName();
        $csrfValue = $this->csrf->getTokenValue();
        
        return [
            'csrf'   => [
                'keys' => [
                    'name'  => $csrfNameKey,
                    'value' => $csrfValueKey
                ],
                'name'  => $csrfName,
                'value' => $csrfValue
            ]
        ];
    }
}

use Slim\Csrf\Guard;
use Slim\Psr7\Factory\ResponseFactory;

$responseFactory = new ResponseFactory();
$guard = new Guard($responseFactory);
$guard->setFailureHandler(function (ServerRequestInterface $request, RequestHandlerInterface $handler) {
    $request = $request->withAttribute("csrf_status", false);
    return $handler->handle($request);
});

if (false === $request->getAttribute('csrf_status')) {
    // display suitable error here
} else {
    // successfully passed CSRF check
}