pictcode

<?php

/**

 * Copyright 2009-2014, Cake Development Corporation (http://cakedc.com)

 *

 * Licensed under The MIT License

 * Redistributions of files must retain the above copyright notice.

 *

 * @copyright Copyright 2009-2014, Cake Development Corporation (http://cakedc.com)

 * @license MIT License (http://www.opensource.org/licenses/mit-license.php)

 */

/**

 * CakePHP Recaptcha helper

 *

 * @package recaptcha

 * @subpackage recaptcha.views.helpers

 */

class RecaptchaHelper extends AppHelper {

/**

 * Secure API Url

 *

 * @var string

 */

        public $secureApiUrl = 'https://www.google.com/recaptcha/api';

/**

 * API Url

 *

 * @var string

 */

        public $apiUrl = 'http://www.google.com/recaptcha/api';

/**

 * View helpers

 *

 * @var array

 */

        public $helpers = array('Form', 'Html');

/**

 * Displays the Recaptcha input

 *

 * @param array $options An array of options

 *

 * ### Options:

 *

 * - `element` String, name of the view element that can be used instead of the hardcoded HTML structure from this helper

 * - `publicKey` String, default is read from Configure::read('Recaptcha.publicKey'), you can override it here

 * - `error` String, optional error message that is displayed using Form::error()

 * - `ssl` Boolean, use SSL or not, default is true

 * - `div` Array of options for the div tag the recaptcha is wrapped with, set to false if you want to disable it

 * - `recaptchaOptions` assoc array of options to pass into RecaptchaOptions var, like 'theme', 'lang'

 *    or 'custom_translations' to runtime configure the widget.

 *

 * @return string The resulting mark up

 * @access public

 */

        public function display($options = array()) {

                $defaults = array(

                        'element' => null,

                        'publicKey' => Configure::read('Recaptcha.publicKey'),

                        'error' => null,

                        'ssl' => true,

                        'error' => false,

                        'div' => array(

                                'class' => 'recaptcha'),

                                'recaptchaOptions' => array(

                                        'theme' => 'red',

                                        'lang' => 'en',

                                        'custom_translations' => array()

                                )

                );

                $options = Set::merge($defaults, $options);

                extract($options);

                if ($ssl) {

                        $server = $this->secureApiUrl;

                } else {

                        $server = $this->apiUrl;

                }

                $errorpart = "";

                if ($error) {

                        $errorpart = "&error=" . $error;

                }

                if (!empty($element)) {

                        $elementOptions = array();

                        if (is_array($element)) {

                                $keys = array_keys($element);

                                $elementOptions = $element[$keys[0]];

                        }

                        return $this->View->element($element, $elementOptions);

                }

                $jsonOptions = preg_replace('/"callback":"([^"\r\n]*)"/', '"callback":$1', json_encode($recaptchaOptions));

                unset($recaptchaOptions);

                if (empty($this->params['isAjax'])) {

                        $configScript = sprintf('var RecaptchaOptions = %s', $jsonOptions);

                        echo $this->Html->scriptBlock($configScript);

                        $script = '';

                        $script .= '<script type="text/javascript" src="' . $server . '/challenge?k=' . $publicKey . '"></script>';

                        $script .= '<noscript>';

                        $script .= '        <iframe src="' . $server . '/noscript?k=' . $publicKey . '" height="300" width="500" frameborder="0"></iframe><br/>';

                        $script .= '        <textarea name="recaptcha_challenge_field" rows="3" cols="40"></textarea>';

                        $script .= '  <input type="hidden" name="recaptcha_response_field" value="manual_challenge"/>';

                        $script .= '</noscript>';

                        if (!empty($error)) {

                                $script .= $this->Form->error($error);

                        }

                        if ($options['div'] != false) {

                                $script = $this->Html->tag('div', $script, $options['div']);

                        }

                        $this->Form->unlockField('recaptcha_challenge_field');

                        $this->Form->unlockField('recaptcha_response_field');

                        return $script;

                }

                $id = uniqid('recaptcha-');

                $script = '';

                $script .= '<div id="' . $id . '"></div>';

                $script .= '<script>';

                $script .= 'if (window.Recaptcha == undefined) {';

                $script .= '  (function() {';

                $script .= '          var headID = document.getElementsByTagName("head")[0];';

                $script .= '                var newScript = document.createElement("script");';

                $script .= '                newScript.type = "text/javascript";';

                $script .= '                newScript.onload = function() {';

                $script .= '                        Recaptcha.create("' . $publicKey . '", "' . $id . '", ' . $jsonOptions . ');';

                $script .= '                  Recaptcha.focus_response_field();';

                $script .= '                };';

                $script .= '                newScript.src = "' . $server . '/js/recaptcha_ajax.js"';

                $script .= '          headID.appendChild(newScript);';

                $script .= '  })();';

                $script .= '} else {';

                $script .= '  setTimeout(\'Recaptcha.create("' . $publicKey . '", "' . $id . '", ' . $jsonOptions . ')\', 1000);';

                $script .= '}';

                $script .= '</script>';

                return $script;

        }

/**

 * Recaptcha signup URL

 *

 * @param string $appName An application name

 * @return string A signup url

 */

        public function signupUrl($appName = null) {

                return "http://recaptcha.net/api/getkey?domain=" . WWW_ROOT . '&app=' . urlencode($appName);

        }

/**

 * AES Pad

 *

 * @param string $val A value to pad

 * @return string

 */

        private function __aesPad($val) {

                $blockSize = 16;

                $numpad = $blockSize - (strlen($val) % $blockSize);

                return str_pad($val, strlen($val) + $numpad, chr($numpad));

        }

/**

 * AES Encryption

 *

 * @param string $value A value

 * @param string $key A key to use

 * @return string

 * @throws Exception

 */

        private function __aesEncrypt($value, $key) {

                if (!function_exists('mcrypt_encrypt')) {

                        throw new Exception(__d('recaptcha', 'To use reCAPTCHA Mailhide, you need to have the mcrypt php module installed.', true));

                }

                $mode = MCRYPT_MODE_CBC;

                $encryption = MCRYPT_RIJNDAEL_128;

                $value = $this->__aesPad($value);

                return mcrypt_encrypt($encryption, $key, $value, $mode, "\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0");

        }

/**

 * Mail-hide URL

 *

 * @param string $x An input string

 * @return string A base 64 encrypted string

 */

        private function __mailhideUrlbase64($x) {

                return strtr(base64_encode($x), '+/', '-_');

        }

/**

 * Gets the reCAPTCHA Mailhide url for a given email

 *

 * @param string $email An email address

 * @return string

 * @throws Exception

 */

        public function mailHideUrl($email = null) {

                $publicKey = Configure::read('Recaptcha.mailHide.publicKey');

                $privateKey = Configure::read('Recaptcha.mailHide.privateKey');

                if ($publicKey == '' || $publicKey == null || $privateKey == "" || $privateKey == null) {

                        throw new Exception(__d('recaptcha', "You need to set a private and public mail hide key. Please visit http://mailhide.recaptcha.net/apikey", true));

                }

                $key = pack('H*', $privateKey);

                $cryptmail = $this->__aesEncrypt($email, $key);

                return "http://mailhide.recaptcha.net/d?k=" . $publicKey . "&c=" . $this->__mailhideUrlbase64($cryptmail);

        }

/**

 * Get a part of the email to show

 *

 * Given johndoe@example,com return ["john", "example.com"].

 * the email is then displayed as john...@example.com

 *

 * @param string $email an email address

 * @return array

 */

        private function __hideEmailParts($email) {

                $array = preg_split("/@/", $email );

                if (strlen($array[0]) <= 4) {

                        $array[0] = substr($array[0], 0, 1);

                } elseif (strlen($array[0]) <= 6) {

                        $array[0] = substr($array[0], 0, 3);

                } else {

                        $array[0] = substr($array[0], 0, 4);

                }

                return $array;

        }

/**

 * Gets html to display an email address given a public an private key to get a key go to:

 * http://mailhide.recaptcha.net/apikey

 *

 * @param string $email An email address

 * @return string

 */

        public function mailHide($email) {

                $emailparts = $this->__hideEmailParts($email);

                $url = $this->mailHideUrl($email);

                return htmlentities($emailparts[0]) . "<a href='" . htmlentities($url) .

                        "' onclick=\"window.open('" . htmlentities($url) . "', '', 'toolbar=0,scrollbars=0,location=0,statusbar=0,menubar=0,resizable=0,width=500,height=300'); return false;\" title=\"Reveal this e-mail address\">...</a>@" . htmlentities($emailparts[1]);

        }

}