3 +--------------------------------------------------------------------+
4 | CiviCRM version 4.6 |
5 +--------------------------------------------------------------------+
6 | Copyright CiviCRM LLC (c) 2004-2014 |
7 +--------------------------------------------------------------------+
8 | This file is a part of CiviCRM. |
10 | CiviCRM is free software; you can copy, modify, and distribute it |
11 | under the terms of the GNU Affero General Public License |
12 | Version 3, 19 November 2007 and the CiviCRM Licensing Exception. |
14 | CiviCRM is distributed in the hope that it will be useful, but |
15 | WITHOUT ANY WARRANTY; without even the implied warranty of |
16 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. |
17 | See the GNU Affero General Public License for more details. |
19 | You should have received a copy of the GNU Affero General Public |
20 | License and the CiviCRM Licensing Exception along |
21 | with this program; if not, contact CiviCRM LLC |
22 | at info[AT]civicrm[DOT]org. If you have questions about the |
23 | GNU Affero General Public License or the licensing of CiviCRM, |
24 | see the CiviCRM license FAQ at http://civicrm.org/licensing |
25 +--------------------------------------------------------------------+
31 * @copyright CiviCRM LLC (c) 2004-2014
35 class CRM_Utils_ReCAPTCHA
{
37 protected $_captcha = NULL;
39 protected $_name = NULL;
41 protected $_url = NULL;
43 protected $_phrase = NULL;
46 * We only need one instance of this object. So we use the singleton
47 * pattern and cache the instance in this variable
52 static private $_singleton = NULL;
55 * Singleton function used to manage this object
57 * @param string the key to permit session scope's
62 public static function &singleton() {
63 if (self
::$_singleton === NULL) {
64 self
::$_singleton = new CRM_Utils_ReCAPTCHA();
66 return self
::$_singleton;
71 public function __construct() {
77 public static function add(&$form) {
79 $config = CRM_Core_Config
::singleton();
81 if (!function_exists('recaptcha_get_html')) {
82 require_once 'packages/recaptcha/recaptchalib.php';
85 // See if we are using SSL
86 if (CRM_Utils_System
::isSSL()) {
89 $html = recaptcha_get_html($config->recaptchaPublicKey
, $error, $useSSL);
91 $form->assign('recaptchaHTML', $html);
92 $form->assign('recaptchaOptions', $config->recaptchaOptions
);
95 'recaptcha_challenge_field',
102 'recaptcha_response_field',
106 $form->registerRule('recaptcha', 'callback', 'validate', 'CRM_Utils_ReCAPTCHA');
108 'recaptcha_challenge_field',
109 ts('Input text must match the phrase in the image. Please review the image and re-enter matching text.'),
117 * @param CRM_Core_Form $form
121 public static function validate($value, $form) {
122 $config = CRM_Core_Config
::singleton();
124 $resp = recaptcha_check_answer($config->recaptchaPrivateKey
,
125 $_SERVER['REMOTE_ADDR'],
126 $_POST["recaptcha_challenge_field"],
127 $_POST["recaptcha_response_field"]
129 return $resp->is_valid
;