Hello,
I have a system in place with a large mysql based usertable that we
want to use to authenticate a mediawiki installation. I want to use
the ExtAuthDB extension. Unfortunately the original system was setup
using mysql password encryption. (password=password('password')) Since
there is no way (that i have found) to decrypt a mysql password in php
or encrypt a password in php using mysql encryption I have been having
some struggles getting this to work. (as is we are comparing a
cleartext password to an encrypted password in the code). If anyone
has come up against this or has any suggestions I would love to hear
them. I have included the standard ExtAuthDB code below for
convenience.
Thanks for your time.
--
Darren Kemp
darrenkemp(a)gmail.com
http://world.anarchy.com/~dkemp
<?php
/**
* Authentication plugin interface. Instantiate a subclass of AuthPlugin
* and set $wgAuth to it to authenticate against some external tool.
*
* The default behavior is not to do anything, and use the local user
* database for all authentication. A subclass can require that all
* accounts authenticate externally, or use it only as a fallback; also
* you can transparently create internal wiki accounts the first time
* someone logs in who can be authenticated externally.
*
* This interface is a derivation of AuthJoomla and might change a bit
before 1.4.0 final is done...
*
*/
$wgExtensionCredits['parserhook'][] = array (
'name' => 'ExtAuthDB',
'author' => '[http://www.mediawiki.org/wiki/User:Bilardi Alessandra
Bilardi]',
'description' => 'Authenticate users about external MySQL database',
'url' => 'http://www.mediawiki.org/wiki/Extension:ExtAuthDB',
'version' => '0.1',
);
require_once ( 'AuthPlugin.php' );
class ExtAuthDB extends AuthPlugin
{
/**
* Add into LocalSettings.php the following code:
*
* MySQL Host Name.
* $wgExtAuthDB_MySQL_Host = '';
* MySQL Username.
* $wgExtAuthDB_MySQL_Username = '';
* MySQL Password.
* $wgExtAuthDB_MySQL_Password = '';
* MySQL Database Name.
* $wgExtAuthDB_MySQL_Database = '';
* MySQL Database Table of users data.
* $wgExtAuthDB_MySQL_Table = '';
* MySQL Database username column label.
* $wgExtAuthDB_MySQL_Login = '';
* MySQL Database login password column label
* $wgExtAuthDB_MySQL_Pswrd = '';
* MySQL Database email column label
* $wgExtAuthDB_MySQL_Email = '';
* MySQL Database user real name column label
* $wgExtAuthDB_MySQL_RealN = '';
* require_once("$IP/extensions/ExtAuthDB/ExtAuthDB.php");
* $wgAuth = new ExtAuthDB();
*
* @return Object Database
*/
private function connectToDB()
{
$db = & Database :: newFromParams(
$GLOBALS['wgExtAuthDB_MySQL_Host'],
$GLOBALS['wgExtAuthDB_MySQL_Username'],
$GLOBALS['wgExtAuthDB_MySQL_Password'],
$GLOBALS['wgExtAuthDB_MySQL_Database']);
$this->userTable = $GLOBALS['wgExtAuthDB_MySQL_Table'];
$this->userLogin = $GLOBALS['wgExtAuthDB_MySQL_Login'];
$this->userPswrd = $GLOBALS['wgExtAuthDB_MySQL_Pswrd'];
$this->userEmail = $GLOBALS['wgExtAuthDB_MySQL_Email'];
$this->userRealN = $GLOBALS['wgExtAuthDB_MySQL_RealN'];
wfDebug("ExtAuthDB::connectToDB() : DB failed to open\n");
return $db;
}
/**
* Check whether there exists a user account with the given name.
* The name will be normalized to MediaWiki's requirements, so
* you might need to munge it (for instance, for lowercase initial
* letters).
*
* @param $username String: username.
* @return bool
* @public
*/
function userExists( $username ) {
# Override this!
return true;
}
/**
* Check if a username+password pair is a valid login.
* The name will be normalized to MediaWiki's requirements, so
* you might need to munge it (for instance, for lowercase initial
* letters).
*
* @param $username String: username.
* @param $password String: user password.
* @return bool
* @public
*/
function authenticate( $username, $password )
{
$db = $this->connectToDB();
$hash_password = $db->selectRow($this->userTable,array
($this->userPswrd), array ($this->userLogin => $username ), __METHOD__
);
if ($password == $hash_password->{$this->userPswrd}) {
return true;
}
return false;
}
/**
* Set the domain this plugin is supposed to use when authenticating.
*
* @param $domain String: authentication domain.
* @public
*/
function setDomain( $domain ) {
$this->domain = $domain;
}
/**
* Check to see if the specific domain is a valid domain.
*
* @param $domain String: authentication domain.
* @return bool
* @public
*/
function validDomain( $domain ) {
# Override this!
return true;
}
/**
* When a user logs in, optionally fill in preferences and such.
* For instance, you might pull the email address or real name from the
* external user database.
*
* The User object is passed by reference so it can be modified; don't
* forget the & on your function declaration.
*
* @param User $user
* @public
*/
function updateUser( &$user )
{
$db = $this->connectToDB();
$euser = $db->selectRow($this->userTable,array ( '*' ), array
($this->userLogin => $user->mName ), __METHOD__ );
$user->setRealName($euser->{$this->userRealN});
$user->setEmail($euser->{$this->userEmail});
$user->mEmailAuthenticated = wfTimestampNow();
$user->saveSettings();
//exit;
# Override this and do something
return true;
}
function disallowPrefsEditByUser() {
return array (
'wpRealName' => true,
'wpUserEmail' => true,
'wpNick' => true
);
}
/**
* Return true if the wiki should create a new local account automatically
* when asked to login a user who doesn't exist locally but does in the
* external auth database.
*
* If you don't automatically create accounts, you must still create
* accounts in some way. It's not possible to authenticate without
* a local account.
*
* This is just a question, and shouldn't perform any actions.
*
* @return bool
* @public
*/
function autoCreate() {
return true;
}
/**
* Can users change their passwords?
*
* @return bool
*/
function allowPasswordChange() {
return false;
}
/**
* Set the given password in the authentication database.
* As a special case, the password may be set to null to request
* locking the password to an unusable value, with the expectation
* that it will be set later through a mail reset or other method.
*
* Return true if successful.
*
* @param $user User object.
* @param $password String: password.
* @return bool
* @public
*/
function setPassword( $user, $password ) {
return true;
}
/**
* Update user information in the external authentication database.
* Return true if successful.
*
* @param $user User object.
* @return bool
* @public
*/
function updateExternalDB( $user ) {
$db = $this->connectToDB();
$euser = $db->selectRow($this->userTable,array ( '*' ), array
($this->userLogin => $user->mName ), __METHOD__ );
$user->setRealName($euser->{$this->userRealN});
$user->setEmail($euser->{$this->userEmail});
$user->mEmailAuthenticated = wfTimestampNow();
$user->saveSettings();
return true;
}
/**
* Check to see if external accounts can be created.
* Return true if external accounts can be created.
* @return bool
* @public
*/
function canCreateAccounts() {
return false;
}
/**
* Add a user to the external authentication database.
* Return true if successful.
*
* @param User $user - only the name should be assumed valid at this point
* @param string $password
* @param string $email
* @param string $realname
* @return bool
* @public
*/
function addUser( $user, $password, $email='', $realname='' ) {
return false;
}
/**
* Return true to prevent logins that don't authenticate here from being
* checked against the local database's password fields.
*
* This is just a question, and shouldn't perform any actions.
*
* @return bool
* @public
*/
function strict() {
return true;
}
/**
* When creating a user account, optionally fill in preferences and such.
* For instance, you might pull the email address or real name from the
* external user database.
*
* The User object is passed by reference so it can be modified; don't
* forget the & on your function declaration.
*
* @param $user User object.
* @param $autocreate bool True if user is being autocreated on login
* @public
*/
function initUser( $user, $autocreate=false ) {
# Override this to do something.
}
/**
* If you want to munge the case of an account name before the final
* check, now is your chance.
*/
function getCanonicalName( $username ) {
return $username;
}
}