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  Classes of Scott Arciszewski  >  Anti-CSRF  >  src/Reusable.php  >  Download  
File: src/Reusable.php
Role: Class source
Content type: text/plain
Description: Class source
Class: Anti-CSRF
Generate tokens to protect against CSRF exploits
Author: By
Last change:
Date: 7 months ago
Size: 2,240 bytes
 

 

Contents

Class file image Download
<?php
declare(strict_types=1);

namespace
ParagonIE\AntiCSRF;

/**
 * Class Reusable
 *
 * Reusable variant of the AntiCSRF class.
 * Tokens don't expire after a single use. This is dangerous, but allows them
 * to be used in AJAX forms.
 *
 * We will not award any bug bounties for any vulnerabilities found in the
 * Reusable class that are not also present in the main class, as we believe
 * this use-case to be a significant security downgrade.
 *
 * @package ParagonIE\AntiCSRF
 */
class Reusable extends AntiCSRF
{
   
/**
     * @var \DateInterval|null
     */
   
protected $tokenLifetime = null;

   
/**
     * @param \DateInterval $interval
     * @return self
     */
   
public function setTokenLifetime(\DateInterval $interval): self
   
{
       
$this->tokenLifetime = $interval;
        return
$this;
    }

   
/**
     * For figuring
     *
     * @param array $args
     * @return array
     */
   
protected function buildBasicToken(array $args = []): array
    {
       
$args['created-date'] = (new \DateTime())->format(\DateTime::ATOM);
        return
$args;
    }

   
/**
     * Use this to change the configuration settings.
     * Only use this if you know what you are doing.
     *
     * @param array $options
     * @return AntiCSRF
     */
   
public function reconfigure(array $options = []): AntiCSRF
   
{
       
/** @var string $opt */
        /** @var \DateInterval $val */
       
foreach ($options as $opt => $val) {
            switch (
$opt) {
                case
'tokenLifetime':
                    if (
$val instanceof \DateInterval) {
                       
$this->tokenLifetime = $val;
                    }
                    break;
            }
        }
        return
parent::reconfigure($options);
    }

   
/**
     * @param array<string, string> $token
     * @return bool
     */
   
public function deleteToken(array $token): bool
   
{
        if (empty(
$token['created-date'])) {
            return
true;
        }
        if (!(
$this->tokenLifetime instanceof \DateInterval)) {
            return
false;
        }
       
$dateTime = (new \DateTime($token['created-date']))->add($this->tokenLifetime);
       
$now = new \DateTime();
        return
$dateTime >= $now;
    }
}