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<?php
/**
* Home-cooked auth libraries - because PEAR is fat.
* @package mirror
* @subpackage lib
* @todo re-enforce one-per-user session limit
*/
/**
* Check admin session against sessions table in database.
* @return bool
*/
function auth_is_valid_session()
{
if (!empty($_COOKIE['mozilla-mirror-admin'])) { // check cookie
$res = db_query("SELECT * FROM mirror_sessions WHERE session_id = '{$_COOKIE['mozilla-mirror-admin']}'"); // check db for id
if ($res && db_numrows($res)>0) {
$buf = db_fetch($res,MYSQL_ASSOC);
// comment line below to disable gc and allow multiple sessions per username
db_query("DELETE FROM mirror_sessions WHERE username='{$buf['username']}' AND session_id != '{$_COOKIE['mozilla-mirror-admin']}'"); // garbage collection
$user = db_fetch(db_query("SELECT * FROM mirror_users WHERE username='{$buf['username']}'"),MYSQL_ASSOC);
if (empty($_SESSION)) {
auth_create_session($user); // if session isn't started, create it and push user data
}
return true;
}
}
return false;
}
/**
* Authentication a user.
* @param string $username
* @param string $password
* @return array|bool array containing user data or false on failure
*/
function auth_mysql($username,$password)
{
if (empty($username)||empty($password)) {
return false;
}
$username = trim(strip_tags(addslashes($username)));
$password = trim(strip_tags(addslashes($password)));
$res = db_query("SELECT * FROM mirror_users WHERE username='{$username}' AND password=MD5('{$password}')");
if ($res && db_numrows($res)>0) {
return db_fetch($res,MYSQL_ASSOC);
} else {
return false;
}
}
/**
* Start a valid session.
* @param array $user array containing user information.
*/
function auth_create_session($user,$secure=0)
{
session_name('mozilla-mirror-admin');
session_set_cookie_params(0,'/',$_SERVER['HTTP_HOST'],$secure);
session_start();
db_query("INSERT INTO mirror_sessions(session_id,username) VALUES('".session_id()."','{$user['username']}')");
$_SESSION['user']=$user;
}
/**
* Logout.
*/
function auth_logout()
{
// comment line below to keep gc from deleting other sessions for this user
db_query("DELETE FROM mirror_sessions WHERE session_id='{$_COOKIE['mozilla-mirror-admin']}' OR username='{$_SESSION['user']['username']}'");
$_COOKIE = array();
$_SESSION = array();
}
?>
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