Файл: upload/module/captcha/include/service/captcha.class.php
Строк: 152
<?php
/**
* [PHPFOX_HEADER]
*/
defined('PHPFOX') or exit('NO DICE!');
/**
*
*
* @copyright [PHPFOX_COPYRIGHT]
* @author Raymond Benc
* @package Module_Captcha
* @version $Id: captcha.class.php 1496 2010-03-05 17:15:05Z Raymond_Benc $
*/
class Captcha_Service_Captcha extends Phpfox_Service
{
private $_oSession;
/**
* Class constructor
*/
public function __construct()
{
$this->_oSession = Phpfox::getService('log.session');
}
public function checkHash($sCode = null)
{
if (Phpfox::getParam('captcha.recaptcha'))
{
require_once(PHPFOX_DIR_LIB . 'recaptcha' . PHPFOX_DS . 'recaptchalib.php');
if (isset($_POST["recaptcha_response_field"]))
{
$oResp = recaptcha_check_answer(Phpfox::getParam('captcha.recaptcha_private_key'), $_SERVER["REMOTE_ADDR"], $_POST["recaptcha_challenge_field"], $_POST["recaptcha_response_field"]);
if ($oResp->is_valid)
{
return true;
}
else
{
return false;
}
}
return false;
}
if ($this->_getHash(strtolower($sCode), $this->_oSession->getSessionId()) == $this->_oSession->get('captcha_hash'))
{
return true;
}
return false;
}
public function setHash($sCode)
{
$iId = $this->_oSession->getSessionId();
$this->database()->update(Phpfox::getT('log_session'), array('captcha_hash' => $this->_getHash($sCode, $iId)), "session_hash = '" . $iId . "'");
}
public function displayCaptcha($sText)
{
((Phpfox::getParam('captcha.captcha_use_font') && function_exists('imagettftext')) ? $this->_writeFromFont($sText) : $this->_writeFromString($sText));
ob_clean();
header("X-Content-Encoded-By: phpFox " . PhpFox::getVersion());
header("Pragma: no-cache");
header('Cache-Control: no-store, no-cache, must-revalidate');
header('Content-Type: image/jpeg');
imagejpeg($this->_hImg);
imagedestroy($this->_hImg);
}
public function generateCode($sCharacters)
{
$sPossible = Phpfox::getParam('captcha.captcha_code');
$sCode = '';
$i = 0;
while ($i < $sCharacters)
{
$sCode .= substr($sPossible, mt_rand(0, strlen($sPossible)-1), 1);
$i++;
}
return strtolower($sCode);
}
/**
* If a call is made to an unknown method attempt to connect
* it to a specific plug-in with the same name thus allowing
* plug-in developers the ability to extend classes.
*
* @param string $sMethod is the name of the method
* @param array $aArguments is the array of arguments of being passed
*/
public function __call($sMethod, $aArguments)
{
/**
* Check if such a plug-in exists and if it does call it.
*/
if ($sPlugin = Phpfox_Plugin::get('captcha.service_captcha__call'))
{
return eval($sPlugin);
}
/**
* No method or plug-in found we must throw a error.
*/
Phpfox_Error::trigger('Call to undefined method ' . __CLASS__ . '::' . $sMethod . '()', E_USER_ERROR);
}
private function _getHash($sCode, $sSalt)
{
return md5(md5($sCode) . $sSalt);
}
private function _writeFromFont($sText)
{
$iString = strlen($sText);
$iWidth = (($iString + 5) * 10 * 2);
$iHeight = 45;
$iTextSize = 20;
$sFont = Phpfox::getParam('core.dir_static') . 'image/font/' . Phpfox::getParam('captcha.captcha_font');
if (!file_exists($sFont))
{
return $this->_writeFromString($sText);
}
$this->_imageCreate($iWidth, $iHeight);
$nBgColor = imageColorAllocate($this->_hImg, 255, 255, 255);
$nTxtColor = imageColorAllocate($this->_hImg, 0, 0, 0);
if (!($aBox = @imagettfbbox($iTextSize, 0, $sFont, $sText)))
{
return $this->_writeFromString($sText);
}
//Find out the width and height of the text box
$iTextW = $aBox[2] - $aBox[0];
$iTextH = $aBox[5] - $aBox[3];
if (function_exists('imagefilledellipse'))
{
$nNoiseColor = imagecolorallocate($this->_hImg, 207, 181, 181);
for ($i = 0; $i < ($iWidth*$iHeight) / 3; $i++)
{
imagefilledellipse($this->_hImg, mt_rand(0, $iWidth), mt_rand(0, $iHeight), 1, 1, $nNoiseColor);
}
}
$iImageLineColor = imagecolorallocate($this->_hImg, 207, 181, 181);
for ($i = 0; $i < ($iWidth*$iHeight) / 150; $i++)
{
imageline($this->_hImg, mt_rand(0, $iWidth), mt_rand(0, $iHeight), mt_rand(0, $iWidth), mt_rand(0, $iHeight), $iImageLineColor);
}
// Calculate the positions
$positionLeft = (($iWidth - $iTextW) / 2) - (20 + $iString);
$positionTop = (($iHeight - $iTextH) / 2);
for ($i = 0; $i < $iString; $i++)
{
if (!@imagettftext($this->_hImg, $iTextSize, 0, $positionLeft, 30, $nTxtColor, $sFont, $sText[$i]))
{
return $this->_writeFromString($sText);
}
$positionLeft += 20;
}
}
private function _writeFromString($sText)
{
$iString = strlen($sText);
$iWidth = (($iString + 5) * 6.4 * 2);
$iHeight = 40;
$this->_imageCreate($iWidth, $iHeight);
$nBgColor = imageColorAllocate($this->_hImg, 255, 255, 255);
$nTxtColor = imageColorAllocate($this->_hImg, 0, 0, 0);
$positionLeft = 20;
for ($i = 0; $i < $iString; $i++)
{
imagestring($this->_hImg, 5, $positionLeft, 12, $sText[$i], $nTxtColor);
$positionLeft += 15;
}
}
private function _imageCreate($iWidth, $iHeight)
{
$this->_hImg = imageCreate($iWidth, $iHeight);
}
}
?>