| 1 | <?php |
| 2 | /* |
| 3 | +--------------------------------------------------------------------+ |
| 4 | | CiviCRM version 4.4 | |
| 5 | +--------------------------------------------------------------------+ |
| 6 | | Copyright CiviCRM LLC (c) 2004-2013 | |
| 7 | +--------------------------------------------------------------------+ |
| 8 | | This file is a part of CiviCRM. | |
| 9 | | | |
| 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. | |
| 13 | | | |
| 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. | |
| 18 | | | |
| 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 | +--------------------------------------------------------------------+ |
| 26 | */ |
| 27 | |
| 28 | /** |
| 29 | * |
| 30 | * @package CRM |
| 31 | * @copyright CiviCRM LLC (c) 2004-2013 |
| 32 | * $Id$ |
| 33 | * |
| 34 | */ |
| 35 | class CRM_Utils_ReCAPTCHA { |
| 36 | |
| 37 | protected $_captcha = NULL; |
| 38 | |
| 39 | protected $_name = NULL; |
| 40 | |
| 41 | protected $_url = NULL; |
| 42 | |
| 43 | protected $_phrase = NULL; |
| 44 | |
| 45 | /** |
| 46 | * We only need one instance of this object. So we use the singleton |
| 47 | * pattern and cache the instance in this variable |
| 48 | * |
| 49 | * @var object |
| 50 | * @static |
| 51 | */ |
| 52 | static private $_singleton = NULL; |
| 53 | |
| 54 | /** |
| 55 | * singleton function used to manage this object |
| 56 | * |
| 57 | * @param string the key to permit session scope's |
| 58 | * |
| 59 | * @return object |
| 60 | * @static |
| 61 | * |
| 62 | */ |
| 63 | static function &singleton() { |
| 64 | if (self::$_singleton === NULL) { |
| 65 | self::$_singleton = new CRM_Utils_ReCAPTCHA(); |
| 66 | } |
| 67 | return self::$_singleton; |
| 68 | } |
| 69 | |
| 70 | function __construct() {} |
| 71 | |
| 72 | /** |
| 73 | * Add element to form |
| 74 | * |
| 75 | */ |
| 76 | static function add(&$form) { |
| 77 | $error = NULL; |
| 78 | $config = CRM_Core_Config::singleton(); |
| 79 | $useSSL = FALSE; |
| 80 | require_once 'packages/recaptcha/recaptchalib.php'; |
| 81 | |
| 82 | // See if we are using SSL |
| 83 | if (CRM_Utils_System::isSSL()) { |
| 84 | $useSSL = TRUE; |
| 85 | } |
| 86 | $html = recaptcha_get_html($config->recaptchaPublicKey, $error, $useSSL); |
| 87 | |
| 88 | $form->assign('recaptchaHTML', $html); |
| 89 | $form->assign('recaptchaOptions', $config->recaptchaOptions); |
| 90 | $form->add( |
| 91 | 'text', |
| 92 | 'recaptcha_challenge_field', |
| 93 | NULL, |
| 94 | NULL, |
| 95 | TRUE |
| 96 | ); |
| 97 | $form->add( |
| 98 | 'hidden', |
| 99 | 'recaptcha_response_field', |
| 100 | 'manual_challenge' |
| 101 | ); |
| 102 | |
| 103 | $form->registerRule('recaptcha', 'callback', 'validate', 'CRM_Utils_ReCAPTCHA'); |
| 104 | $form->addRule( |
| 105 | 'recaptcha_challenge_field', |
| 106 | ts('Input text must match the phrase in the image. Please review the image and re-enter matching text.'), |
| 107 | 'recaptcha', |
| 108 | $form |
| 109 | ); |
| 110 | } |
| 111 | |
| 112 | static function validate($value, $form) { |
| 113 | $config = CRM_Core_Config::singleton(); |
| 114 | |
| 115 | $resp = recaptcha_check_answer($config->recaptchaPrivateKey, |
| 116 | $_SERVER['REMOTE_ADDR'], |
| 117 | $_POST["recaptcha_challenge_field"], |
| 118 | $_POST["recaptcha_response_field"] |
| 119 | ); |
| 120 | return $resp->is_valid; |
| 121 | } |
| 122 | } |
| 123 | |