diff -r 5b37998e522e -r 162c1de6545a web/lib/Zend/Service/ReCaptcha/MailHide.php
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/web/lib/Zend/Service/ReCaptcha/MailHide.php	Fri Mar 11 15:05:35 2011 +0100
@@ -0,0 +1,351 @@
+<?php
+/**
+ * Zend Framework
+ *
+ * LICENSE
+ *
+ * This source file is subject to the new BSD license that is bundled
+ * with this package in the file LICENSE.txt.
+ * It is also available through the world-wide-web at this URL:
+ * http://framework.zend.com/license/new-bsd
+ * If you did not receive a copy of the license and are unable to
+ * obtain it through the world-wide-web, please send an email
+ * to license@zend.com so we can send you a copy immediately.
+ *
+ * @category   Zend
+ * @package    Zend_Service
+ * @subpackage ReCaptcha
+ * @copyright  Copyright (c) 2005-2010 Zend Technologies USA Inc. (http://www.zend.com)
+ * @license    http://framework.zend.com/license/new-bsd     New BSD License
+ */
+
+/** @see Zend_Service_ReCaptcha */
+require_once 'Zend/Service/ReCaptcha.php';
+
+/**
+ * Zend_Service_ReCaptcha_MailHide
+ *
+ * @category   Zend
+ * @package    Zend_Service
+ * @subpackage ReCaptcha
+ * @copyright  Copyright (c) 2005-2010 Zend Technologies USA Inc. (http://www.zend.com)
+ * @license    http://framework.zend.com/license/new-bsd     New BSD License
+ * @version    $Id: MailHide.php 20108 2010-01-06 22:05:31Z matthew $
+ */
+class Zend_Service_ReCaptcha_MailHide extends Zend_Service_ReCaptcha
+{
+    /**#@+
+     * Encryption constants
+     */
+    const ENCRYPTION_MODE = MCRYPT_MODE_CBC;
+    const ENCRYPTION_CIPHER = MCRYPT_RIJNDAEL_128;
+    const ENCRYPTION_BLOCK_SIZE = 16;
+    const ENCRYPTION_IV = "\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0";
+    /**#@-*/
+
+    /**
+     * Url to the mailhide server
+     *
+     * @var string
+     */
+    const MAILHIDE_SERVER = 'http://mailhide.recaptcha.net/d';
+
+    /**
+     * The email address to protect
+     *
+     * @var string
+     */
+    protected $_email = null;
+
+    /**
+     * @var Zend_Validate_Interface
+     */
+    protected $_emailValidator;
+
+    /**
+     * Binary representation of the private key
+     *
+     * @var string
+     */
+    protected $_privateKeyPacked = null;
+
+    /**
+     * The local part of the email
+     *
+     * @var string
+     */
+    protected $_emailLocalPart = null;
+
+    /**
+     * The domain part of the email
+     *
+     * @var string
+     */
+    protected $_emailDomainPart = null;
+
+    /**
+     * Local constructor
+     *
+     * @param string $publicKey
+     * @param string $privateKey
+     * @param string $email
+     * @param array|Zend_Config $options
+     */
+    public function __construct($publicKey = null, $privateKey = null, $email = null, $options = null)
+    {
+        /* Require the mcrypt extension to be loaded */
+        $this->_requireMcrypt();
+
+        /* If options is a Zend_Config object we want to convert it to an array so we can merge it with the default options */
+        if ($options instanceof Zend_Config) {
+            $options = $options->toArray();
+        }
+
+        /* Merge if needed */
+        if (is_array($options)) {
+            $options = array_merge($this->getDefaultOptions(), $options);
+        } else {
+            $options = $this->getDefaultOptions();
+        }
+
+        parent::__construct($publicKey, $privateKey, null, $options);
+
+        if ($email !== null) {
+            $this->setEmail($email);
+        }
+    }
+
+
+    /**
+     * Get emailValidator
+     *
+     * @return Zend_Validate_Interface
+     */
+    public function getEmailValidator()
+    {
+        if (null === $this->_emailValidator) {
+            require_once 'Zend/Validate/EmailAddress.php';
+            $this->setEmailValidator(new Zend_Validate_EmailAddress());
+        }
+        return $this->_emailValidator;
+    }
+
+    /**
+     * Set email validator
+     *
+     * @param  Zend_Validate_Interface $validator
+     * @return Zend_Service_ReCaptcha_MailHide
+     */
+    public function setEmailValidator(Zend_Validate_Interface $validator)
+    {
+        $this->_emailValidator = $validator;
+        return $this;
+    }
+
+
+    /**
+     * See if the mcrypt extension is available
+     *
+     * @throws Zend_Service_ReCaptcha_MailHide_Exception
+     */
+    protected function _requireMcrypt()
+    {
+        if (!extension_loaded('mcrypt')) {
+            /** @see Zend_Service_ReCaptcha_MailHide_Exception */
+            require_once 'Zend/Service/ReCaptcha/MailHide/Exception.php';
+
+            throw new Zend_Service_ReCaptcha_MailHide_Exception('Use of the Zend_Service_ReCaptcha_MailHide component requires the mcrypt extension to be enabled in PHP');
+        }
+    }
+
+    /**
+     * Serialize as string
+     *
+     * When the instance is used as a string it will display the email address. Since we can't
+     * throw exceptions within this method we will trigger a user warning instead.
+     *
+     * @return string
+     */
+    public function __toString()
+    {
+        try {
+            $return = $this->getHtml();
+        } catch (Exception $e) {
+            $return = '';
+            trigger_error($e->getMessage(), E_USER_WARNING);
+        }
+
+        return $return;
+    }
+
+    /**
+     * Get the default set of parameters
+     *
+     * @return array
+     */
+    public function getDefaultOptions()
+    {
+        return array(
+            'encoding'       => 'UTF-8',
+            'linkTitle'      => 'Reveal this e-mail address',
+            'linkHiddenText' => '...',
+            'popupWidth'     => 500,
+            'popupHeight'    => 300,
+        );
+    }
+
+    /**
+     * Override the setPrivateKey method
+     *
+     * Override the parent method to store a binary representation of the private key as well.
+     *
+     * @param string $privateKey
+     * @return Zend_Service_ReCaptcha_MailHide
+     */
+    public function setPrivateKey($privateKey)
+    {
+        parent::setPrivateKey($privateKey);
+
+        /* Pack the private key into a binary string */
+        $this->_privateKeyPacked = pack('H*', $this->_privateKey);
+
+        return $this;
+    }
+
+    /**
+     * Set the email property
+     *
+     * This method will set the email property along with the local and domain parts
+     *
+     * @param string $email
+     * @return Zend_Service_ReCaptcha_MailHide
+     */
+    public function setEmail($email)
+    {
+        $this->_email = $email;
+
+        $validator = $this->getEmailValidator();
+        if (!$validator->isValid($email)) {
+            require_once 'Zend/Service/ReCaptcha/MailHide/Exception.php';
+            throw new Zend_Service_ReCaptcha_MailHide_Exception('Invalid email address provided');
+        }
+
+        $emailParts = explode('@', $email, 2);
+
+        /* Decide on how much of the local part we want to reveal */
+        if (strlen($emailParts[0]) <= 4) {
+            $emailParts[0] = substr($emailParts[0], 0, 1);
+        } else if (strlen($emailParts[0]) <= 6) {
+            $emailParts[0] = substr($emailParts[0], 0, 3);
+        } else {
+            $emailParts[0] = substr($emailParts[0], 0, 4);
+        }
+
+        $this->_emailLocalPart = $emailParts[0];
+        $this->_emailDomainPart = $emailParts[1];
+
+        return $this;
+    }
+
+    /**
+     * Get the email property
+     *
+     * @return string
+     */
+    public function getEmail()
+    {
+        return $this->_email;
+    }
+
+    /**
+     * Get the local part of the email address
+     *
+     * @return string
+     */
+    public function getEmailLocalPart()
+    {
+        return $this->_emailLocalPart;
+    }
+
+    /**
+     * Get the domain part of the email address
+     *
+     * @return string
+     */
+    public function getEmailDomainPart()
+    {
+        return $this->_emailDomainPart;
+    }
+
+    /**
+     * Get the HTML code needed for the mail hide
+     *
+     * @param string $email
+     * @return string
+     * @throws Zend_Service_ReCaptcha_MailHide_Exception
+     */
+    public function getHtml($email = null)
+    {
+        if ($email !== null) {
+            $this->setEmail($email);
+        } elseif (null === ($email = $this->getEmail())) {
+            /** @see Zend_Service_ReCaptcha_MailHide_Exception */
+            require_once 'Zend/Service/ReCaptcha/MailHide/Exception.php';
+            throw new Zend_Service_ReCaptcha_MailHide_Exception('Missing email address');
+        }
+
+        if ($this->_publicKey === null) {
+            /** @see Zend_Service_ReCaptcha_MailHide_Exception */
+            require_once 'Zend/Service/ReCaptcha/MailHide/Exception.php';
+            throw new Zend_Service_ReCaptcha_MailHide_Exception('Missing public key');
+        }
+
+        if ($this->_privateKey === null) {
+            /** @see Zend_Service_ReCaptcha_MailHide_Exception */
+            require_once 'Zend/Service/ReCaptcha/MailHide/Exception.php';
+            throw new Zend_Service_ReCaptcha_MailHide_Exception('Missing private key');
+        }
+
+        /* Generate the url */
+        $url = $this->_getUrl();
+
+        $enc = $this->getOption('encoding');
+
+        /* Genrate the HTML used to represent the email address */
+        $html = htmlentities($this->getEmailLocalPart(), ENT_COMPAT, $enc) 
+            . '<a href="' 
+                . htmlentities($url, ENT_COMPAT, $enc) 
+                . '" onclick="window.open(\'' 
+                    . htmlentities($url, ENT_COMPAT, $enc) 
+                    . '\', \'\', \'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->getEmailDomainPart(), ENT_COMPAT, $enc);
+
+        return $html;
+    }
+
+    /**
+     * Get the url used on the "hidden" part of the email address
+     *
+     * @return string
+     */
+    protected function _getUrl()
+    {
+        /* Figure out how much we need to pad the email */
+        $numPad = self::ENCRYPTION_BLOCK_SIZE - (strlen($this->_email) % self::ENCRYPTION_BLOCK_SIZE);
+
+        /* Pad the email */
+        $emailPadded = str_pad($this->_email, strlen($this->_email) + $numPad, chr($numPad));
+
+        /* Encrypt the email */
+        $emailEncrypted = mcrypt_encrypt(self::ENCRYPTION_CIPHER, $this->_privateKeyPacked, $emailPadded, self::ENCRYPTION_MODE, self::ENCRYPTION_IV);
+
+        /* Return the url */
+        return self::MAILHIDE_SERVER . '?k=' . $this->_publicKey . '&c=' . strtr(base64_encode($emailEncrypted), '+/', '-_');
+    }
+}