File indexing completed on 2024-05-12 06:02:02

 <?php
 namespace Cgsmith\Validate;
 
 /**
  * Class Recaptcha
  * Handle validation against Google API
  *
  * @package Cgsmith
  * @license MIT
  * @author Chris Smith
  * @link   https://github.com/google/recaptcha
  */
 class Recaptcha extends \Zend_Validate_Abstract
 {
     /** @var string secret key */
     protected $_secretKey;
 
     /** @const string invalid captcha */
     const INVALID_CAPTCHA = 'invalidCaptcha';
 
     /** @const string invalid captcha */
     const CAPTCHA_EMPTY = 'captchaEmpty';
 
     /** @const string URL to where requests are posted */
     const SITE_VERIFY_URL = 'https://www.google.com/recaptcha/api/siteverify';
 
     /** @const string http method for communicating with google */
     const POST_METHOD = 'POST';
 
     /** @const string peer key for communication */
     const PEER_KEY = 'www.google.com';
 
     /** @const string default name for captcha result in $_POST array */
     const CAPTCHA_NAME = 'g-recaptcha-response';
 
     protected $_messageTemplates = array(
         self::INVALID_CAPTCHA => 'The captcha was invalid',
         self::CAPTCHA_EMPTY   => 'The captcha must be completed'
     );
 
     /**
      * @param $options
      */
     public function __construct($options) {
         $this->_secretKey = $options['secretKey'];
     }
 
     /**
      * Validate our form's element
      *
      * @param mixed $value
      * @param null $context
      * @return bool
      */
     public function isValid($value, $context = null)
     {
         if (empty($value) AND (false == isset($context[self::CAPTCHA_NAME]))) {
             $this->_error(self::CAPTCHA_EMPTY);
             return false;
         }
 
         if (empty($value)) {
             $this->_value = $context[self::CAPTCHA_NAME];
         } else {
             $this->_value = $value;
         }
 
         if (false == $this->_verify($this->_value)) {
             $this->_error(self::INVALID_CAPTCHA);
             return false;
         }
 
         return true;
     }
 
     /**
      * Calls the reCAPTCHA siteverify API to verify whether the user passes the captcha test.
      *
      * @param  mixed $value
      * @return boolean
      * @link   https://github.com/google/recaptcha
      */
     protected function _verify($value)
     {
         $queryString = http_build_query(array(
             'secret'   => $this->_secretKey,
             'response' => $value,
             'remoteIp' => $_SERVER['REMOTE_ADDR']
         ));
 
         /**
          * PHP 5.6.0 changed the way you specify the peer name for SSL context options.
          * Using "CN_name" will still work, but it will raise deprecated errors.
          */
         $peerKey = version_compare(PHP_VERSION, '5.6.0', '<') ? 'CN_name' : 'peer_name';
         $context = stream_context_create(array(
             'http'  => array(
                 'header'      => "Content-type: application/x-www-form-urlencoded\r\n",
                 'method'      => self::POST_METHOD,
                 'content'     => $queryString,
                 'verify_peer' => true,
                 $peerKey      => self::PEER_KEY
             )
         ));
         $jsonObject = json_decode(file_get_contents(self::SITE_VERIFY_URL,false,$context));
 
         return $jsonObject->success;
     }
 }