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<?php |
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/** |
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* \AppserverIo\Psr\Servlet\SessionUtils |
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* |
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* NOTICE OF LICENSE |
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* |
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* This source file is subject to the Open Software License (OSL 3.0) |
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* that is available through the world-wide-web at this URL: |
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* http://opensource.org/licenses/osl-3.0.php |
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* |
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* PHP version 5 |
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* |
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* @author Tim Wagner <[email protected]> |
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* @copyright 2015 TechDivision GmbH <[email protected]> |
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* @license http://opensource.org/licenses/osl-3.0.php Open Software License (OSL 3.0) |
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* @link https://github.com/appserver-io-psr/servlet |
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* @link http://www.appserver.io |
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*/ |
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namespace AppserverIo\Psr\Servlet; |
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/** |
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* A servlet session implementation. |
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* |
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* @author Tim Wagner <[email protected]> |
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* @copyright 2015 TechDivision GmbH <[email protected]> |
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* @license http://opensource.org/licenses/osl-3.0.php Open Software License (OSL 3.0) |
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* @link https://github.com/appserver-io-psr/servlet |
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* @link http://www.appserver.io |
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*/ |
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class SessionUtils |
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{ |
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/** |
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* Private constructor to disable direct instantiation. |
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*/ |
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private function __construct() |
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{ |
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} |
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/** |
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* Creates a random string with the passed length. |
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* |
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* @param integer $length The byte length to generate |
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* |
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* @return string The hex encoded random bytes |
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*/ |
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public static function generateRandomString($length = 32) |
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{ |
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// generate random bytes using openssl |
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$randomBytes = openssl_random_pseudo_bytes($length, $cryptoSafe); |
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// make sure the generation was a) successful and b) cryptographically safe |
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if (false === $randomBytes || false === $cryptoSafe) { |
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throw new \RuntimeException('Unable to generate cryptographically safe pseudo random bytes.'); |
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} |
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return bin2hex($randomBytes); |
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} |
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} |
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appserver-io-psr /
servlet
