Based on a post from David Cameron (19 Feb 2005) I've hacked up the
following modification to loadFromSession (in User.php) which allows
authentication against our NTLM database (based on the variable AUTH_USER
passed from IIS).
I'm trying to avoid hacking the code for 1.4 so if you know a way to achieve
this without modifying User.php (or another core file) then feedback would
be most appreciated.
Cheers,
al.
/**
* Read datas from session
* @static
*/
function loadFromSession() {
global $wgMemc, $wgDBname;
if ( isset( $_SESSION['wsUserID'] ) ) {
if ( 0 != $_SESSION['wsUserID'] ) {
$sId = $_SESSION['wsUserID'];
} else {
return new User();
}
} else if ( isset( $_COOKIE["{$wgDBname}UserID"] ) ) {
$sId = IntVal( $_COOKIE["{$wgDBname}UserID"] );
$_SESSION['wsUserID'] = $sId;
} else if ( isset($_SERVER["AUTH_USER"])) {
//Rembrandt modification to allow logon via authentication
information
//passed from IIS
global $wgUser;
global $wgDeferredUpdateList;
//get the username
$temp = explode('DOMAINNAME', $_SERVER["AUTH_USER"]); //remove
the domain name from AUTH_USER
$name = $temp[1];
//pull in the usernames and passwords we'll need for the
database lookup
global $wgDBprefix;
global $wgDBuser;
global $wgDBpassword;
global $wgDBserver;
global $wgDBname;
//we'll use PHP's MYSQL module to access the mediawiki
database as it's Q&D
mysql_connect($wgDBserver,$wgDBuser,$wgDBpassword);
@mysql_select_db($wgDBname) or die( "Unable to select user
database for NTLM authentication");
$query="SELECT * FROM " . $wgDBprefix . "user WHERE
LOWER(user_name) = '" . strtolower($name) . "'";
$result = mysql_query($query);
$row = mysql_fetch_array($result, MYSQL_ASSOC);
mysql_close();
//set the variables we need to transparently authenticate
$sId = $row['user_id'];
$_SESSION['wsUserID'] = $row['user_id'];
$_SESSION['wsUserName'] = $row['user_name'];
$_SESSION['wsToken'] = $row['user_token'];
} else {
return new User();
}
if ( isset( $_SESSION['wsUserName'] ) ) {
$sName = $_SESSION['wsUserName'];
} else if ( isset( $_COOKIE["{$wgDBname}UserName"] ) ) {
$sName = $_COOKIE["{$wgDBname}UserName"];
$_SESSION['wsUserName'] = $sName;
} else {
return new User();
}
$passwordCorrect = FALSE;
$user = $wgMemc->get( $key = "$wgDBname:user:id:$sId" );
if($makenew = !$user) {
wfDebug( "User::loadFromSession() unable to load
from memcached\n" );
$user = new User();
$user->mId = $sId;
$user->loadFromDatabase();
} else {
wfDebug( "User::loadFromSession() got from cache!\n"
);
}
if ( isset( $_SESSION['wsToken'] ) ) {
$passwordCorrect = $_SESSION['wsToken'] ==
$user->mToken;
} else if ( isset( $_COOKIE["{$wgDBname}Token"] ) ) {
$passwordCorrect = $user->mToken ==
$_COOKIE["{$wgDBname}Token"];
} else {
return new User(); # Can't log in from session
}
if ( ( strtolower($sName) == strtolower($user->mName) ) &&
$passwordCorrect ) { //modified to allow for case differences between
mediawiki and NTLM usernames
if($makenew) {
if($wgMemc->set( $key, $user )) {
wfDebug( "User::loadFromSession()
successfully saved user\n" );
} else {
wfDebug( "User::loadFromSession()
unable to save to memcached\n" );
}
}
$user->spreadBlock();
return $user;
}
return new User(); # Can't log in from session
}