app/code/core/Mage/Rss/Helper/Data.php

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<?php
/**
 * Magento
 *
 * NOTICE OF LICENSE
 *
 * This source file is subject to the Open Software License (OSL 3.0)
 * that is bundled with this package in the file LICENSE.txt.
 * It is also available through the world-wide-web at this URL:
 * http://opensource.org/licenses/osl-3.0.php
 * 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@magentocommerce.com so we can send you a copy immediately.
 *
 * DISCLAIMER
 *
 * Do not edit or add to this file if you wish to upgrade Magento to newer
 * versions in the future. If you wish to customize Magento for your
 * needs please refer to http://www.magentocommerce.com for more information.
 *
 * @category   Mage
 * @package    Mage_Rss
 * @copyright  Copyright (c) 2009 Irubin Consulting Inc. DBA Varien (http://www.varien.com)
 * @license    http://opensource.org/licenses/osl-3.0.php  Open Software License (OSL 3.0)
 */


/**
 * Rss data helper
 *
 * @category   Mage
 * @package    Mage_Rss
 * @author     Magento Core Team <core@magentocommerce.com>
 */
class Mage_Rss_Helper_Data extends Mage_Core_Helper_Abstract
{
    /**
     * Authenticate customer on frontend
     *
     */
    public function authFrontend()
    {
        $session = Mage::getSingleton('rss/session');
        if ($session->isCustomerLoggedIn()) {
            return;
        }
        list($username, $password) = $this->authValidate();
        $customer = Mage::getModel('customer/customer')->authenticate($username, $password);
        if ($customer && $customer->getId()) {
            Mage::getSingleton('rss/session')->settCustomer($customer);
        } else {
            $this->authFailed();
        }
    }

    /**
     * Authenticate admin and check ACL
     *
     * @param string $path
     */
    public function authAdmin($path)
    {
        $session = Mage::getSingleton('rss/session');
        if ($session->isAdminLoggedIn()) {
            return;
        }
        list($username, $password) = $this->authValidate();
        Mage::getSingleton('adminhtml/url')->setNoSecret(true);
        $adminSession = Mage::getModel('admin/session');
        $user = $adminSession->login($username, $password);
        //$user = Mage::getModel('admin/user')->login($username, $password);
        if($user && $user->getId() && $user->getIsActive() == '1' && $adminSession->isAllowed($path)){
            $session->setAdmin($user);
        } else {
            $this->authFailed();
        }
    }

    /**
     * Validate Authenticate
     *
     * @param array $headers
     * @return array
     */
    public function authValidate($headers=null)
    {
        $userPass = Mage::helper('core/http')->authValidate($headers);
        return $userPass;
    }

    /**
     * Send authenticate failed headers
     *
     */
    public function authFailed()
    {
        Mage::helper('core/http')->authFailed();
    }
}

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