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300 lines
8.7 KiB
PHP
300 lines
8.7 KiB
PHP
<?php
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/**
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* Zend Framework
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*
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* LICENSE
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*
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* This source file is subject to the new BSD license that is bundled
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* with this package in the file LICENSE.txt.
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* It is also available through the world-wide-web at this URL:
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* http://framework.zend.com/license/new-bsd
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* If you did not receive a copy of the license and are unable to
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* obtain it through the world-wide-web, please send an email
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* to license@zend.com so we can send you a copy immediately.
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*
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* @category Zend
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* @package Zend_Service
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* @subpackage ReCaptcha
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* @copyright Copyright (c) 2005-2009 Zend Technologies USA Inc. (http://www.zend.com)
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* @license http://framework.zend.com/license/new-bsd New BSD License
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*/
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/** @see Zend_Service_ReCaptcha */
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require_once 'Zend/Service/ReCaptcha.php';
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/**
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* Zend_Service_ReCaptcha_MailHide
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*
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* @category Zend
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* @package Zend_Service
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* @subpackage ReCaptcha
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* @copyright Copyright (c) 2005-2009 Zend Technologies USA Inc. (http://www.zend.com)
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* @license http://framework.zend.com/license/new-bsd New BSD License
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* @version $Id: MailHide.php 16971 2009-07-22 18:05:45Z mikaelkael $
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*/
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class Zend_Service_ReCaptcha_MailHide extends Zend_Service_ReCaptcha
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{
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/**#@+
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* Encryption constants
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*/
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const ENCRYPTION_MODE = MCRYPT_MODE_CBC;
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const ENCRYPTION_CIPHER = MCRYPT_RIJNDAEL_128;
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const ENCRYPTION_BLOCK_SIZE = 16;
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const ENCRYPTION_IV = "\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0";
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/**#@-*/
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/**
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* Url to the mailhide server
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*
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* @var string
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*/
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const MAILHIDE_SERVER = 'http://mailhide.recaptcha.net/d';
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/**
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* The email address to protect
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*
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* @var string
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*/
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protected $_email = null;
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/**
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* Binary representation of the private key
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*
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* @var string
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*/
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protected $_privateKeyPacked = null;
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/**
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* The local part of the email
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*
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* @var string
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*/
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protected $_emailLocalPart = null;
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/**
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* The domain part of the email
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*
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* @var string
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*/
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protected $_emailDomainPart = null;
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/**
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* Local constructor
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*
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* @param string $publicKey
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* @param string $privateKey
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* @param string $email
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* @param array|Zend_Config $options
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*/
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public function __construct($publicKey = null, $privateKey = null, $email = null, $options = null)
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{
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/* Require the mcrypt extension to be loaded */
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$this->_requireMcrypt();
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/* If options is a Zend_Config object we want to convert it to an array so we can merge it with the default options */
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if ($options instanceof Zend_Config) {
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$options = $options->toArray();
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}
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/* Merge if needed */
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if (is_array($options)) {
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$options = array_merge($this->getDefaultOptions(), $options);
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} else {
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$options = $this->getDefaultOptions();
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}
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parent::__construct($publicKey, $privateKey, null, $options);
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if ($email !== null) {
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$this->setEmail($email);
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}
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}
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/**
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* See if the mcrypt extension is available
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*
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* @throws Zend_Service_ReCaptcha_MailHide_Exception
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*/
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protected function _requireMcrypt()
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{
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if (!extension_loaded('mcrypt')) {
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/** @see Zend_Service_ReCaptcha_MailHide_Exception */
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require_once 'Zend/Service/ReCaptcha/MailHide/Exception.php';
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throw new Zend_Service_ReCaptcha_MailHide_Exception('Use of the Zend_Service_ReCaptcha_MailHide component requires the mcrypt extension to be enabled in PHP');
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}
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}
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/**
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* Serialize as string
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*
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* When the instance is used as a string it will display the email address. Since we can't
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* throw exceptions within this method we will trigger a user warning instead.
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*
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* @return string
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*/
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public function __toString()
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{
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try {
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$return = $this->getHtml();
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} catch (Exception $e) {
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$return = '';
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trigger_error($e->getMessage(), E_USER_WARNING);
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}
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return $return;
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}
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/**
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* Get the default set of parameters
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*
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* @return array
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*/
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public function getDefaultOptions()
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{
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return array(
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'linkTitle' => 'Reveal this e-mail address',
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'linkHiddenText' => '...',
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'popupWidth' => 500,
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'popupHeight' => 300,
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);
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}
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/**
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* Override the setPrivateKey method
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*
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* Override the parent method to store a binary representation of the private key as well.
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*
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* @param string $privateKey
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* @return Zend_Service_ReCaptcha_MailHide
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*/
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public function setPrivateKey($privateKey)
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{
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parent::setPrivateKey($privateKey);
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/* Pack the private key into a binary string */
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$this->_privateKeyPacked = pack('H*', $this->_privateKey);
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return $this;
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}
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/**
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* Set the email property
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*
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* This method will set the email property along with the local and domain parts
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*
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* @param string $email
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* @return Zend_Service_ReCaptcha_MailHide
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*/
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public function setEmail($email)
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{
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$this->_email = $email;
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$emailParts = explode('@', $email, 2);
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/* Decide on how much of the local part we want to reveal */
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if (strlen($emailParts[0]) <= 4) {
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$emailParts[0] = substr($emailParts[0], 0, 1);
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} else if (strlen($emailParts[0]) <= 6) {
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$emailParts[0] = substr($emailParts[0], 0, 3);
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} else {
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$emailParts[0] = substr($emailParts[0], 0, 4);
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}
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$this->_emailLocalPart = $emailParts[0];
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$this->_emailDomainPart = $emailParts[1];
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return $this;
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}
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/**
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* Get the email property
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*
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* @return string
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*/
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public function getEmail()
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{
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return $this->_email;
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}
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/**
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* Get the local part of the email address
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*
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* @return string
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*/
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public function getEmailLocalPart()
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{
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return $this->_emailLocalPart;
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}
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/**
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* Get the domain part of the email address
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*
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* @return string
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*/
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public function getEmailDomainPart()
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{
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return $this->_emailDomainPart;
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}
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/**
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* Get the HTML code needed for the mail hide
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*
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* @param string $email
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* @return string
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* @throws Zend_Service_ReCaptcha_MailHide_Exception
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*/
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public function getHtml($email = null)
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{
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if ($email !== null) {
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$this->setEmail($email);
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} else if ($this->_email === null) {
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/** @see Zend_Service_ReCaptcha_MailHide_Exception */
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require_once 'Zend/Service/ReCaptcha/MailHide/Exception.php';
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throw new Zend_Service_ReCaptcha_MailHide_Exception('Missing email address');
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}
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if ($this->_publicKey === null) {
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/** @see Zend_Service_ReCaptcha_MailHide_Exception */
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require_once 'Zend/Service/ReCaptcha/MailHide/Exception.php';
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throw new Zend_Service_ReCaptcha_MailHide_Exception('Missing public key');
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}
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if ($this->_privateKey === null) {
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/** @see Zend_Service_ReCaptcha_MailHide_Exception */
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require_once 'Zend/Service/ReCaptcha/MailHide/Exception.php';
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throw new Zend_Service_ReCaptcha_MailHide_Exception('Missing private key');
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}
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/* Generate the url */
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$url = $this->_getUrl();
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/* Genrate the HTML used to represent the email address */
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$html = htmlentities($this->_emailLocalPart) . '<a href="' . htmlentities($url) . '" onclick="window.open(\'' . htmlentities($url) . '\', \'\', \'toolbar=0,scrollbars=0,location=0,statusbar=0,menubar=0,resizable=0,width=' . $this->_options['popupWidth'] . ',height=' . $this->_options['popupHeight'] . '\'); return false;" title="' . $this->_options['linkTitle'] . '">' . $this->_options['linkHiddenText'] . '</a>@' . htmlentities($this->_emailDomainPart);
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return $html;
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}
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/**
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* Get the url used on the "hidden" part of the email address
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*
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* @return string
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*/
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protected function _getUrl()
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{
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/* Figure out how much we need to pad the email */
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$numPad = self::ENCRYPTION_BLOCK_SIZE - (strlen($this->_email) % self::ENCRYPTION_BLOCK_SIZE);
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/* Pad the email */
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$emailPadded = str_pad($this->_email, strlen($this->_email) + $numPad, chr($numPad));
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/* Encrypt the email */
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$emailEncrypted = mcrypt_encrypt(self::ENCRYPTION_CIPHER, $this->_privateKeyPacked, $emailPadded, self::ENCRYPTION_MODE, self::ENCRYPTION_IV);
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/* Return the url */
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return self::MAILHIDE_SERVER . '?k=' . $this->_publicKey . '&c=' . strtr(base64_encode($emailEncrypted), '+/', '-_');
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}
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} |