DooDigestAuth php（后台）授权管理类 web浏览器授权

<?php/** * DooDigestAuth class file. * * @author Leng Sheng Hong <[e-mail]> * @link http://www.doophp.com/ * @copyright Copyright &copy; 2009 Leng Sheng Hong * @license http://www.doophp.com/license *//** * Handles HTTP digest authentication * * <p>HTTP digest authentication can be used with the URI router. * HTTP digest is much more recommended over the use of HTTP Basic auth which doesn't provide any encryption. * If you are running PHP on Apache in CGI/FastCGI mode, you would need to * add the following line to your .htaccess for digest auth to work correctly.</p> * <code>RewriteRule .* - [E=HTTP_AUTHORIZATION:%{HTTP:Authorization},L]</code> * * <p>This class is tested under Apache 2.2 and Cherokee web server. It should work in both mod_php and cgi mode.</p> * * @author Leng Sheng Hong <[e-mail]> * @version $Id: DooDigestAuth.php 1000 2009-07-7 18:27:22 * @package doo.auth * @since 1.0 */class DooDigestAuth{    /**     * Authenticate against a list of username and passwords.     *     * <p>HTTP Digest Authentication doesn't work with PHP in CGI mode,     * you have to add this into your .htaccess <code>RewriteRule .* - [E=HTTP_AUTHORIZATION:%{HTTP:Authorization},L]</code></p>     *     * @param string $realm Name of the authentication session     * @param array $users An assoc array of username and password: array('uname1'=>'pwd1', 'uname2'=>'pwd2')     * @param string $fail_msg Message to be displayed if the User cancel the login     * @param string $fail_url URL to be redirect if the User cancel the login     * @return string The username if login success.     */    public static function http_auth($realm, $users, $fail_msg=NULL, $fail_url=NULL){        $realm = "Restricted area - $realm";        //user => password        //$users = array('admin' => '1234', 'guest' => 'guest');        if(!empty($_SERVER['REDIRECT_HTTP_AUTHORIZATION']) && strpos($_SERVER['REDIRECT_HTTP_AUTHORIZATION'], 'Digest')===0){            $_SERVER['PHP_AUTH_DIGEST'] = $_SERVER['REDIRECT_HTTP_AUTHORIZATION'];        }        if (empty($_SERVER['PHP_AUTH_DIGEST'])) {            header('WWW-Authenticate: Digest realm="'.$realm.                   '",qop="auth",nonce="'.uniqid().'",opaque="'.md5($realm).'"');            header('HTTP/1.1 401 Unauthorized');            if($fail_msg!=NULL)                die($fail_msg);            if($fail_url!=NULL)                die("<script>window.location.href = '$fail_url'</script>");            exit;        }        // analyze the PHP_AUTH_DIGEST variable        if (!($data = self::http_digest_parse($_SERVER['PHP_AUTH_DIGEST'])) || !isset($users[$data['username']])){            header('WWW-Authenticate: Digest realm="'.$realm.                   '",qop="auth",nonce="'.uniqid().'",opaque="'.md5($realm).'"');            header('HTTP/1.1 401 Unauthorized');            if($fail_msg!=NULL)                die($fail_msg);            if($fail_url!=NULL)                die("<script>window.location.href = '$fail_url'</script>");            exit;        }        // generate the valid response        $A1 = md5($data['username'] . ':' . $realm . ':' . $users[$data['username']]);        $A2 = md5($_SERVER['REQUEST_METHOD'].':'.$data['uri']);        $valid_response = md5($A1.':'.$data['nonce'].':'.$data['nc'].':'.$data['cnonce'].':'.$data['qop'].':'.$A2);        if ($data['response'] != $valid_response){            header('HTTP/1.1 401 Unauthorized');            header('WWW-Authenticate: Digest realm="'.$realm.                   '",qop="auth",nonce="'.uniqid().'",opaque="'.md5($realm).'"');            if($fail_msg!=NULL)                die($fail_msg);            if($fail_url!=NULL)                die("<script>window.location.href = '$fail_url'</script>");            exit;        }        // ok, valid username & password        return $data['username'];    }    /**     * Method to parse the http auth header, works with IE.     *     * Internet Explorer returns a qop="xxxxxxxxxxx" in the header instead of qop=xxxxxxxxxxx as most browsers do.     *     * @param string $txt header string to parse     * @return array An assoc array of the digest auth session     */    private static function http_digest_parse($txt)    {        $res = preg_match("/username=\"([^\"]+)\"/i", $txt, $match);        $data['username'] = (isset($match[1]))?$match[1]:null;        $res = preg_match('/nonce=\"([^\"]+)\"/i', $txt, $match);        $data['nonce'] = $match[1];        $res = preg_match('/nc=([0-9]+)/i', $txt, $match);        $data['nc'] = $match[1];        $res = preg_match('/cnonce=\"([^\"]+)\"/i', $txt, $match);        $data['cnonce'] = $match[1];        $res = preg_match('/qop=([^,]+)/i', $txt, $match);        $data['qop'] = str_replace('"','',$match[1]);        $res = preg_match('/uri=\"([^\"]+)\"/i', $txt, $match);        $data['uri'] = $match[1];        $res = preg_match('/response=\"([^\"]+)\"/i', $txt, $match);        $data['response'] = $match[1];        return $data;    }}

调用方法:

require_once(dirname(__FILE__)."/DooDigestAuth.php");DooDigestAuth::http_auth('example.com', array('admin'=>"123456789"));