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[2014-11-08 18:41 UTC] thomaxz at gmail dot com
Description:
------------
First of the, I use an online web hosting server so can't upgrade anything. PHP 5.3
When using Example 2 in the HTTP authentication with PHP article
it works first, but when wrong creditnals is neter, it will be wrong forever.
Which makes the user not able to login.
Test script:
---------------
$realm = "Hurra 2";
//user => password
$users = array('tcx' => 'yesmrsir');
if (empty($_SERVER['PHP_AUTH_DIGEST'])) {
header('WWW-Authenticate: Digest realm="'.$realm.
'",qop="auth",nonce="'.uniqid().'",opaque="'.md5($realm).'"');
header($_SERVER["SERVER_PROTOCOL"].' 401 Unauthorized');
$txts='<!DOCTYPE HTML PUBLIC \"-//IETF//DTD HTML 2.0//EN\"><html><head><title>403 Forbidden</title></head><body>';
$txts.='<h1>Forbidden</h1><p>You don\'t have permission to access ny.php on this server.</p><hr>';
$txts.='<address>Apache Server at example.com Port 80</address></body></html>';
die($txts);
}
// analyze the PHP_AUTH_DIGEST variable
if (!($data = http_digest_parse($_SERVER['PHP_AUTH_DIGEST'])) ||
!isset($users[$data['username']]))
header('WWW-Authenticate: Digest realm="'.$realm.
'",qop="auth",nonce="'.uniqid().'",opaque="'.md5($realm).'"');
header($_SERVER["SERVER_PROTOCOL"].' 401 Unauthorized');
die('Wrong Credentials!');
var_dump($_SERVER['PHP_AUTH_DIGEST']);
// 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)
die('Wrong Credentials!');
// ok, valid username & password
echo 'You are logged in as: ' . $data['username'];
//comment reae change
// function to parse the http auth header
function http_digest_parse($txt)
{
// protect against missing data
$needed_parts = array('nonce'=>1, 'nc'=>1, 'cnonce'=>1, 'qop'=>1, 'username'=>1, 'uri'=>1, 'response'=>1);
$data = array();
preg_match_all('@(\w+)=(?:([\'"])([^$2]+)$2|([^\s,]+))@', $txt, $matches, PREG_SET_ORDER);
foreach ($matches as $m) {
$data[$m[1]] = $m[3] ? trim($m[3],"\",'") : trim($m[4],"\",'");
unset($needed_parts[$m[1]]);
}
return $needed_parts ? false : $data;
}
Expected result:
----------------
the user is able to renter creditals and then login.
Actual result:
--------------
the script show
wrong crenditals and not show new login box
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Last updated: Thu Nov 06 11:00:01 2025 UTC |
If I missing some {} in analyze the PHP_AUTH_DIGEST then I don't understand, it its exactly as it is written in the manual. if so your have a bug in your manual.> it its exactly as it is written in the manual. No. It most certainly is not. Your code is // analyze the PHP_AUTH_DIGEST variable if (!($data = http_digest_parse($_SERVER['PHP_AUTH_DIGEST'])) || !isset($users[$data['username']])) header('WWW-Authenticate: Digest realm="'.$realm. '",qop="auth",nonce="'.uniqid().'",opaque="'.md5($realm).'"'); header($_SERVER["SERVER_PROTOCOL"].' 401 Unauthorized'); die('Wrong Credentials!'); var_dump($_SERVER['PHP_AUTH_DIGEST']); The manual's code is // analyze the PHP_AUTH_DIGEST variable if (!($data = http_digest_parse($_SERVER['PHP_AUTH_DIGEST'])) || !isset($users[$data['username']])) die('Wrong Credentials!');