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<?php
declare(strict_types=1);
namespace Sabre\HTTP\Auth;
/**
* HTTP Basic authentication utility.
*
* This class helps you setup basic auth. The process is fairly simple:
*
* 1. Instantiate the class.
* 2. Call getCredentials (this will return null or a user/pass pair)
* 3. If you didn't get valid credentials, call 'requireLogin'
*
* @copyright Copyright (C) fruux GmbH (https://fruux.com/)
* @author Evert Pot (http://evertpot.com/)
* @license http://sabre.io/license/ Modified BSD License
*/
class Basic extends AbstractAuth
{
/**
* This method returns a numeric array with a username and password as the
* only elements.
*
* If no credentials were found, this method returns null.
*
* @return array|null
*/
public function getCredentials()
{
$auth = $this->request->getHeader('Authorization');
if (!$auth) {
return null;
}
if ('basic ' !== strtolower(substr($auth, 0, 6))) {
return null;
}
$credentials = explode(':', base64_decode(substr($auth, 6)), 2);
if (2 !== count($credentials)) {
return null;
}
return $credentials;
}
/**
* This method sends the needed HTTP header and status code (401) to force
* the user to login.
*/
public function requireLogin()
{
$this->response->addHeader('WWW-Authenticate', 'Basic realm="'.$this->realm.'", charset="UTF-8"');
$this->response->setStatus(401);
}
}
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