<?php

/**
 * Hoa Framework
 *
 *
 * @license
 *
 * GNU General Public License
 *
 * This file is part of Hoa Open Accessibility.
 * Copyright (c) 2007, 2008 Ivan ENDERLIN. All rights reserved.
 *
 * HOA Open Accessibility is free software; you can redistribute it and/or
 * modify it under the terms of the GNU General Public License as published by
 * the Free Software Foundation; either version 2 of the License, or
 * (at your option) any later version.
 *
 * HOA Open Accessibility is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with HOA Open Accessibility; if not, write to the Free Software
 * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA  02110-1301  USA
 *
 *
 * @category    Framework
 * @package     Hoa_Form
 * @subpackage  Hoa_Form_Element_InputCaptcha
 *
 */

/**
 * Hoa_Framework
 */
require_once 'Framework.php';

/**
 * Hoa_Form_Exception
 */
import('Form.Exception');

/**
 * Hoa_Form_Element_Abstract
 */
import('Form.Element.Abstract');

/**
 * Class Hoa_Form_Element_InputCaptcha.
 *
 * Describe the input type text element.
 *
 * @author      
 * @copyright   
 * @license     http://gnu.org/licenses/gpl.txt GNU GPL
 * @since       PHP 5
 * @version     0.1
 * @package     Hoa_Form
 * @subpackage  Hoa_Form_Element_InputCaptcha
 */

class Hoa_Form_Element_InputCaptcha extends Hoa_Form_Element_Abstract {

    /**
     * List of attributes.
     *
     * @var Hoa_Form_Element_Abstract array
     */
    protected $attributes = array(
        'id'              => array(
            'default'     => null,
            'required'    => true,
            'type'        => parent::ATTRIBUTE_TYPE_ID,
            'description' => null,
            'value'       => null
        ),
        'name'            => array(
            'default'     => null,
            'required'    => true,
            'type'        => parent::ATTRIBUTE_TYPE_CDATA,
            'description' => 'submit as part of form',
            'value'       => null
        )
    );



    /**
     * Build an input type password.
     *
     * @access  public
     * @param   mixed   $attributes    Attributes.
     * @param   mixed   $rest          Rest of options.
     * @return  void
     */
    public function __construct ( $attributes, $rest = null ) {

        parent::__construct($attributes, 'id');

        if(is_string($rest)) {

            $this->setLabel($rest);
            $this->setDecorator('InputCaptcha');
        }
        elseif(is_array($rest)) {

            if(isset($rest['label']))
                $this->setLabel($rest['label']);
            else
                $this->setLabel(null);

            //if(isset($rest['filter']))
                //$this->setFilter($rest['filter']);

            //if(isset($rest['validator']))
                //$this->setValidator($rest['validator']);

            //if(isset($rest['decorator']))
                //$this->setDecorator($rest['decorator']);
            //else
                $this->setDecorator('InputCaptcha');
        }
        else {

            $this->setDecorator('InputCaptcha');
            $this->setLabel(null);
        }
    }

    /**
     * To string method.
     *
     * @access  public
     * @return  string
     */
    public function __toString ( ) {

        try {
            return self::recaptcha_get_html('xxxxxx'); // Public Key
            //return '<input'. $this->getAttributesChain() . ' />';
        }
        catch ( Hoa_Form_Exception $e ) {

            return $e->__toString();
        }
    }

    /*
       * This is a PHP library that handles calling reCAPTCHA.
       *    - Documentation and latest version
       *          http://recaptcha.net/plugins/php/
       *    - Get a reCAPTCHA API Key
       *          http://recaptcha.net/api/getkey
       *    - Discussion group
       *          http://groups.google.com/group/recaptcha
       *
       * Copyright (c) 2007 reCAPTCHA -- http://recaptcha.net
       * AUTHORS:
       *   Mike Crawford
       *   Ben Maurer
       *
       * Permission is hereby granted, free of charge, to any person obtaining a copy
       * of this software and associated documentation files (the "Software"), to deal
       * in the Software without restriction, including without limitation the rights
       * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
       * copies of the Software, and to permit persons to whom the Software is
       * furnished to do so, subject to the following conditions:
       *
       * The above copyright notice and this permission notice shall be included in
       * all copies or substantial portions of the Software.
       *
       * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
       * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
       * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
       * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
       * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
       * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
       * THE SOFTWARE.
    */

    /**
     * Gets the challenge HTML (javascript and non-javascript version).
     * This is called from the browser, and the resulting reCAPTCHA HTML widget
     * is embedded within the HTML form it was called from.
     * @param string $pubkey A public key for reCAPTCHA
     * @param string $error The error given by reCAPTCHA (optional, default is null)
     * @param boolean $use_ssl Should the request be made over ssl? (optional, default is false)

     * @return string - The HTML to be embedded in the user's form.
     */
    private function recaptcha_get_html ( $pubkey, $error = null, $use_ssl = false ) {

        if ($pubkey == null || $pubkey == '')
            die('To use reCAPTCHA you must get an API key from <a href="http://recaptcha.net/api/getkey">http://recaptcha.net/api/getkey</a>');

        if ($use_ssl)
            $server = 'https://api-secure.recaptcha.net';
        else
            $server = 'http://api.recaptcha.net';

        $errorpart = "";

        if ($error)
            $errorpart = "&amp;error=" . $error;

        return '
            <script type="text/javascript" src="'. $server . '/challenge?k=' . $pubkey . $errorpart . '"></script>
            <noscript>
                  <iframe src="'. $server . '/noscript?k=' . $pubkey . $errorpart . '" height="300" width="500" frameborder="0"></iframe><br/>
                  <textarea name="recaptcha_challenge_field" rows="3" cols="40"></textarea>
                  <input type="hidden" name="recaptcha_response_field" id="name="recaptcha_response_field" value="manual_challenge"/>
            </noscript>
        ';
    }



}

<?php

/**
 * Hoa Framework
 *
 *
 * @license
 *
 * GNU General Public License
 *
 * This file is part of Hoa Open Accessibility.
 * Copyright (c) 2007, 2009 Ivan ENDERLIN. All rights reserved.
 *
 * HOA Open Accessibility is free software; you can redistribute it and/or
 * modify it under the terms of the GNU General Public License as published by
 * the Free Software Foundation; either version 2 of the License, or
 * (at your option) any later version.
 *
 * HOA Open Accessibility is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with HOA Open Accessibility; if not, write to the Free Software
 * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA  02110-1301  USA
 *
 *
 * @category    Framework
 * @package     Hoa_Form
 * @subpackage  Hoa_Form_Decorator_InputCaptcha
 *
 */

/**
 * Hoa_Framework
 */
require_once 'Framework.php';

/**
 * Hoa_Form_Exception
 */
import('Form.Exception');

/**
 * Hoa_Form_Decorator_Abstract
 */
import('Form.Decorator.Abstract');

/**
 * Class Hoa_Form_Decorator_InputCaptcha.
 *
 * Decorate the input type text element.
 *
 * @author      
 * @copyright   
 * @license     http://gnu.org/licenses/gpl.txt GNU GPL
 * @since       PHP 5
 * @version     0.1
 * @package     Hoa_Form
 * @subpackage  Hoa_Form_Decorator_InputCaptcha
 */

class Hoa_Form_Decorator_InputCaptcha extends Hoa_Form_Decorator_Abstract {

    /**
     * Make a render of an input type text.
     *
     * @access  public
     * @param   Hoa_Form_Element_Abstract  $element      The element.
     * @param   Hoa_Form_Element_Label     $label        The associated label
     *                                                   element.
     * @param   Hoa_Validate_Abstract      $validator    The element validator
     *                                                   collection.
     * @return  string
     */
    public function render ( Hoa_Form_Element_Abstract $element,
        Hoa_Form_Element_Label    $label,
        Hoa_Validate_Abstract     $validator ) {

        return '  <p>' . $label . "\n" .
               '     ' . $element . $validator . '</p>' . "\n";
    }
}

import('Form.Element.InputCaptcha');

      $fieldset->addElements(array(
            'captcha'          => array(
                'type'      => Hoa_Form::ELEMENT_INPUT_CAPTCHA,
                'attribute' => array(
                    'id'    => 'recaptcha_response_field',
                    'name'  => 'recaptcha_response_field'
                )
            )
       ));

<?php
/*
 * This is a PHP library that handles calling reCAPTCHA.
 *    - Documentation and latest version
 *          http://recaptcha.net/plugins/php/
 *    - Get a reCAPTCHA API Key
 *          http://recaptcha.net/api/getkey
 *    - Discussion group
 *          http://groups.google.com/group/recaptcha
 *
 * Copyright (c) 2007 reCAPTCHA -- http://recaptcha.net
 * AUTHORS:
 *   Mike Crawford
 *   Ben Maurer
 *
 * Permission is hereby granted, free of charge, to any person obtaining a copy
 * of this software and associated documentation files (the "Software"), to deal
 * in the Software without restriction, including without limitation the rights
 * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
 * copies of the Software, and to permit persons to whom the Software is
 * furnished to do so, subject to the following conditions:
 *
 * The above copyright notice and this permission notice shall be included in
 * all copies or substantial portions of the Software.
 *
 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
 * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
 * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
 * THE SOFTWARE.
 */

define("RECAPTCHA_API_SERVER", "http://api.recaptcha.net");
define("RECAPTCHA_API_SECURE_SERVER", "https://api-secure.recaptcha.net");
define("RECAPTCHA_VERIFY_SERVER", "api-verify.recaptcha.net");

/**
 * Encodes the given data into a query string format
 * @param $data - array of string elements to be encoded
 * @return string - encoded request
 */
function _recaptcha_qsencode ($data) {
        $req = "";
        foreach ( $data as $key => $value )
                $req .= $key . '=' . urlencode( stripslashes($value) ) . '&';

        // Cut the last '&'
        $req=substr($req,0,strlen($req)-1);
        return $req;
}



/**
 * Submits an HTTP POST to a reCAPTCHA server
 * @param string $host
 * @param string $path
 * @param array $data
 * @param int port
 * @return array response
 */
function _recaptcha_http_post($host, $path, $data, $port = 80) {

        $req = _recaptcha_qsencode ($data);

        $http_request  = "POST $path HTTP/1.0\r\n";
        $http_request .= "Host: $host\r\n";
        $http_request .= "Content-Type: application/x-www-form-urlencoded;\r\n";
        $http_request .= "Content-Length: " . strlen($req) . "\r\n";
        $http_request .= "User-Agent: reCAPTCHA/PHP\r\n";
        $http_request .= "\r\n";
        $http_request .= $req;

        $response = '';
        if( false == ( $fs = @fsockopen($host, $port, $errno, $errstr, 10) ) ) {
                die ('Could not open socket');
        }

        fwrite($fs, $http_request);

        while ( !feof($fs) )
                $response .= fgets($fs, 1160); // One TCP-IP packet
        fclose($fs);
        $response = explode("\r\n\r\n", $response, 2);

        return $response;
}





/**
 * A ReCaptchaResponse is returned from recaptcha_check_answer()
 */
class ReCaptchaResponse {
        var $is_valid;
        var $error;
}


/**
  * Calls an HTTP POST function to verify if the user's guess was correct
  * @param string $privkey
  * @param string $remoteip
  * @param string $challenge
  * @param string $response
  * @param array $extra_params an array of extra variables to post to the server
  * @return ReCaptchaResponse
  */
function recaptcha_check_answer ($privkey, $remoteip, $challenge, $response, $extra_params = array())
{
    if ($privkey == null || $privkey == '') {
        die ("To use reCAPTCHA you must get an API key from <a href='http://recaptcha.net/api/getkey'>http://recaptcha.net/api/getkey</a>");
    }

    if ($remoteip == null || $remoteip == '') {
        die ("For security reasons, you must pass the remote ip to reCAPTCHA");
    }



        //discard spam submissions
        if ($challenge == null || strlen($challenge) == 0 || $response == null || strlen($response) == 0) {
                $recaptcha_response = new ReCaptchaResponse();
                $recaptcha_response->is_valid = false;
                $recaptcha_response->error = 'incorrect-captcha-sol';
                return $recaptcha_response;
        }

        $response = _recaptcha_http_post (RECAPTCHA_VERIFY_SERVER, "/verify",
                                          array (
                                                 'privatekey' => $privkey,
                                                 'remoteip' => $remoteip,
                                                 'challenge' => $challenge,
                                                 'response' => $response
                                                 ) + $extra_params
                                          );

        $answers = explode ("\n", $response [1]);
        $recaptcha_response = new ReCaptchaResponse();

        if (trim ($answers [0]) == 'true') {
                $recaptcha_response->is_valid = true;
        }
        else {
                $recaptcha_response->is_valid = false;
                $recaptcha_response->error = $answers [1];
        }
        return $recaptcha_response;

}

/**
 * gets a URL where the user can sign up for reCAPTCHA. If your application
 * has a configuration page where you enter a key, you should provide a link
 * using this function.
 * @param string $domain The domain where the page is hosted
 * @param string $appname The name of your application
 */
function recaptcha_get_signup_url ($domain = null, $appname = null) {
    return "http://recaptcha.net/api/getkey?" .  _recaptcha_qsencode (array ('domain' => $domain, 'app' => $appname));
}

function _recaptcha_aes_pad($val) {
    $block_size = 16;
    $numpad = $block_size - (strlen ($val) % $block_size);
    return str_pad($val, strlen ($val) + $numpad, chr($numpad));
}

/* Mailhide related code */

function _recaptcha_aes_encrypt($val,$ky) {
    if (! function_exists ("mcrypt_encrypt")) {
        die ("To use reCAPTCHA Mailhide, you need to have the mcrypt php module installed.");
    }
    $mode=MCRYPT_MODE_CBC;
    $enc=MCRYPT_RIJNDAEL_128;
    $val=_recaptcha_aes_pad($val);
    return mcrypt_encrypt($enc, $ky, $val, $mode, "\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0");
}


function _recaptcha_mailhide_urlbase64 ($x) {
    return strtr(base64_encode ($x), '+/', '-_');
}

/* gets the reCAPTCHA Mailhide url for a given email, public key and private key */
function recaptcha_mailhide_url($pubkey, $privkey, $email) {
    if ($pubkey == '' || $pubkey == null || $privkey == "" || $privkey == null) {
        die ("To use reCAPTCHA Mailhide, you have to sign up for a public and private key, " .
             "you can do so at <a href='http://mailhide.recaptcha.net/apikey'>http://mailhide.recaptcha.net/apikey</a>");
    }


    $ky = pack('H*', $privkey);
    $cryptmail = _recaptcha_aes_encrypt ($email, $ky);

    return "http://mailhide.recaptcha.net/d?k=" . $pubkey . "&c=" . _recaptcha_mailhide_urlbase64 ($cryptmail);
}

/**
 * gets the parts of the email to expose to the user.
 * eg, given johndoe@example,com return ["john", "example.com"].
 * the email is then displayed as john...@example.com
 */
function _recaptcha_mailhide_email_parts ($email) {
    $arr = preg_split("/@/", $email );

    if (strlen ($arr[0]) <= 4) {
        $arr[0] = substr ($arr[0], 0, 1);
    } else if (strlen ($arr[0]) <= 6) {
        $arr[0] = substr ($arr[0], 0, 3);
    } else {
        $arr[0] = substr ($arr[0], 0, 4);
    }
    return $arr;
}

/**
 * Gets html to display an email address given a public an private key.
 * to get a key, go to:
 *
 * http://mailhide.recaptcha.net/apikey
 */
function recaptcha_mailhide_html($pubkey, $privkey, $email) {
    $emailparts = _recaptcha_mailhide_email_parts ($email);
    $url = recaptcha_mailhide_url ($pubkey, $privkey, $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]);

}


?>

        
        // Vérification CAPTCHA
        require_once('lib/recaptchalib.php');
        $privatekey = 'xxxxxxx';
        $resp = recaptcha_check_answer($privatekey,
                                        $_SERVER["REMOTE_ADDR"],
                                        $_POST["recaptcha_challenge_field"],
                                        $_POST["recaptcha_response_field"]);

        if (!$resp->is_valid) {
            $this->view->error = true;
        }