1: <?php
  2: /**
  3:  * reCaptcha handler (http://www.google.com/recaptcha)
  4:  *
  5:  * This plugin lets you select from one of Google's reCaptcha themes (<i>Red</i>, <i>White</i>, <i>Black Glass</i>, or <i>Clean</i>)
  6:  * or from a custom reCaptcha theme such as the <i>lt-blue</i> theme included.
  7:  *
  8:  * The <i>lt-blue></i> theme is intended as an example of how to create a custom theme.
  9:  * You can create themes and place them into the <var>%USER_PLUGIN_FOLDER%/reCpatcha</var> folder. The folder name will be the theme name. The only
 10:  * required file is <var>reCaptcha.html</var> but you can include other items like images, etc. in the folder.
 11:  *
 12:  * Your custom <var>reCaptcha.html</var> will be processed at runtime making substitutions of the followng "definitions":
 13:  * <ul>
 14:  *  <li><var>__GETHELP__</var> => <i>localized text for</i> "Help"</li>
 15:  *  <li><var>__GETIMAGE__</var> => <i>localized text for</i> "Get an image CAPTCHA"</li>
 16:  *  <li><var>__GETAUDIO__</var> => <i>localized text for</i> "Get an audio CAPTCHA"</li>
 17:  *  <li><var>__RELOAD__</var> => <i>localized text for</i> "Get another CAPTCHA"</li>
 18:  *  <li><var>__WORDS__</var> => <i>localized text for</i> "Enter the words above"</li>
 19:  *  <li><var>__NUMBERS__</var> => <i>localized text for</i> "Enter the numbers you hear"</li>
 20:  *  <li><var>__ERROR__</var> => <i>localized text for</i> "Incorrect please try again"</li>
 21:  *  <li><var>__SOURCEWEBPATH__</var> => <i>the WEB path to your folder (for url references)</i></li>
 22:  * </ul>
 23:  *
 24:  * @package plugins
 25:  * @subpackage spam
 26:  */
 27: // force UTF-8 Ø
 28: $plugin_is_filter = 5 | CLASS_PLUGIN;
 29: $plugin_description = gettext("Google reCaptcha handler.");
 30: $plugin_author = "Stephen Billard (sbillard)";
 31: $plugin_disable = ($_zp_captcha->name && $_zp_captcha->name != 'reCaptcha') ? sprintf(gettext('Only one Captcha handler plugin may be enabled. <a href="#%1$s"><code>%1$s</code></a> is already enabled.'), $_zp_captcha->name) : '';
 32: 
 33: $option_interface = 'reCaptcha';
 34: 
 35: require_once(dirname(__FILE__) . '/reCaptcha/recaptchalib.php');
 36: 
 37: class reCaptcha extends _zp_captcha {
 38: 
 39:     var $name = 'reCaptcha';
 40: 
 41:     /**
 42:      * Class instantiator
 43:      *
 44:      * @return captcha
 45:      */
 46:     function __construct() {
 47:         setOptionDefault('reCaptcha_theme', 'red');
 48:     }
 49: 
 50:     /**
 51:      * Returns array of supported options for the admin-options handler
 52:      *
 53:      * @return unknown
 54:      */
 55:     function getOptionsSupported() {
 56:         $themes = array(gettext('Red')               => 'red', gettext('White')          => 'white', gettext('Black Glass') => 'blackglass', gettext('Clean')            => 'clean');
 57:         $custom = getPluginFiles('*', 'reCaptcha', false);
 58:         foreach ($custom as $theme => $path) {
 59:             if (is_dir($path)) {
 60:                 $themes[$theme = basename($theme)] = $theme;
 61:             }
 62:         }
 63: 
 64:         return array(
 65:                         gettext('Public key')    => array('key'      => 'reCaptcha_public_key', 'type'   => OPTION_TYPE_TEXTBOX,
 66:                                         'order'  => 1,
 67:                                         'desc'   => gettext('Enter your <em>reCaptcha</em> public key. You can obtain this key from the Google <a href="http://www.google.com/recaptcha">reCaptcha</a> site')),
 68:                         gettext('Private key') => array('key'        => 'reCaptcha_private_key', 'type'  => OPTION_TYPE_TEXTBOX,
 69:                                         'order'  => 2,
 70:                                         'desc'   => gettext('Enter your <em>reCaptcha</em> private key.')),
 71:                         gettext('Theme')             => array('key'              => 'reCaptcha_theme', 'type'            => OPTION_TYPE_SELECTOR,
 72:                                         'order'          => 3,
 73:                                         'selections' => $themes,
 74:                                         'desc'           => gettext('Select the <em>reCaptcha</em> theme.')),
 75:                         ''                                       => array('key'      => 'reCcaptcha_image', 'type'   => OPTION_TYPE_CUSTOM,
 76:                                         'order'  => 4,
 77:                                         'desc'   => gettext('Sample CAPTCHA image'))
 78:         );
 79:     }
 80: 
 81:     function handleOption($key, $cv) {
 82:         $captcha = $this->getCaptcha(NULL);
 83:         ?>
 84:         <span id="zenphoto_captcha_image_loc"><?php echo $captcha['input']; ?></span>
 85:         <?php
 86:     }
 87: 
 88:     /**
 89:      * Checks reCaptcha
 90:      *
 91:      * @return bool
 92:      */
 93:     function checkCaptcha($s1, $s2) {
 94:         $resp = recaptcha_check_answer(getOption('reCaptcha_private_key'), @$_SERVER["REMOTE_ADDR"], @$_POST["recaptcha_challenge_field"], @$_POST["recaptcha_response_field"]);
 95:         return $resp->is_valid;
 96:     }
 97: 
 98:     /**
 99:      * generates a simple captcha for comments
100:      *
101:      * Thanks to gregb34 who posted the original code
102:      *
103:      * Returns the captcha code string and image URL (via the $image parameter).
104:      *
105:      * @return string;
106:      */
107:     function getCaptcha($prompt) {
108:         $theme = getOption('reCaptcha_theme');
109:         $publicKey = getOption('reCaptcha_public_key');
110:         $lang = strtolower(substr(ZENPHOTO_LOCALE, 0, 2));
111: 
112:         if (!getOption('reCaptcha_public_key')) {
113:             return array('input'     => '', 'html'   => '<p class="errorbox">' . gettext('reCAPTCHA is not properly configured.') . '</p>', 'hidden' => '');
114:         } else {
115: 
116:             $source = getPlugin('reCaptcha/' . $theme . '/reCaptcha.html');
117:             if ($source) {
118:                 $webpath = dirname(getplugin('reCaptcha/' . $theme . '/reCaptcha.html', false, true));
119:                 $tr = array('__GETHELP__'                => gettext("Help"),
120:                                 '__GETIMAGE__'           => gettext("Get a visual challenge"),
121:                                 '__GETAUDIO__'           => gettext("Get an audio challenge"),
122:                                 '__RELOAD__'                 => gettext("Get another challenge"),
123:                                 '__WORDS__'                  => gettext("Type the two words"),
124:                                 '__NUMBERS__'                => gettext("Type what you hear"),
125:                                 '__ERROR__'                  => gettext("Incorrect please try again"),
126:                                 '__SOURCEWEBPATH__'  => $webpath);
127:                 $html = strtr(file_get_contents($source), $tr);
128:                 $theme = 'custom'; //   to tell google to use the above
129:             } else {
130:                 $html = '';
131:             }
132:             $themejs = '<script type="text/javascript">' . "\n" .
133:                             "  var RecaptchaOptions = {\n";
134:             if (!in_array($lang, array('de', 'en', 'es', 'fr', 'nl', 'ru', 'pt', 'tr'))) { // google's list as of June 2013
135:                 $themejs .= "      custom_translations : {\n" .
136:                                 "               instructions_visual : 'Type the two words',\n" .
137:                                 "               instructions_audio : 'Type what you hear',\n" .
138:                                 "               play_again : 'Play sound again',\n" .
139:                                 "               cant_hear_this : 'Download the sound as MP3',\n" .
140:                                 "               visual_challenge : 'Get a visual challenge',\n" .
141:                                 "               audio_challenge : 'Get an audio challenge',\n" .
142:                                 "               refresh_btn : 'Get another challenge',\n" .
143:                                 "               help_btn : 'Help',\n" .
144:                                 "               incorrect_try_again : 'Incorrect please try again',\n" .
145:                                 "      },\n";
146:             }
147:             $themejs .= "       lang : '$lang',\n" .
148:                             "               theme : '$theme'\n" .
149:                             "               };\n" .
150:                             "</script>\n";
151:             $html .= recaptcha_get_html($publicKey, NULL, secureServer());
152:             return array('html'  => '<label class="captcha_label">' . $prompt . '</label>', 'input'  => $themejs . $html);
153:         }
154:     }
155: 
156: }
157: 
158: if ($plugin_disable) {
159:     enableExtension('reCaptcha', 0);
160: } else {
161:     $_zp_captcha = new reCaptcha();
162: }
163: ?>
164: