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1 | <?php |
2 | /* | |
3 | +--------------------------------------------------------------------+ | |
4 | | CiviCRM version 4.3 | | |
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 |