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<?php
// Set the session name.
session_name(SESS_COOKIE);
// Set session parameters
session_set_cookie_params(0, JAIL_COOKIES?ROOT:'/');
// Start the session
session_start();
// Session creation time
if(!isset($_SESSION['created'])) $_SESSION['created'] = time();
if(!isset($_COOKIE[HASH_COOKIE]) || !isset($_COOKIE[TIME_COOKIE]) || $_COOKIE[HASH_COOKIE] != md5($_COOKIE[TIME_COOKIE].SALT)) {
$time = time();
setcookie(TIME_COOKIE, $time, time()+COOKIE_EXPIRE, JAIL_COOKIES?ROOT:'/', null, false, true);
setcookie(HASH_COOKIE, md5($time.SALT), $time+COOKIE_EXPIRE, JAIL_COOKIES?ROOT:'/', null, false, true);
$user = Array('valid' => false, 'appeared' => $time);
} else {
$user = Array('valid' => true, 'appeared' => $_COOKIE[TIME_COOKIE]);
}
// 'false' means that the user is not logged in as a moderator
$mod = false;
// Creates a small random string for validating moderators' cookies
function mkhash($length=12) {
// The method here isn't really important,
// but I think this generates a relatively
// unique string that looks cool.
// If you choose to change this, make sure it cannot include a ':' character.
return substr(base64_encode(sha1(rand() . time(), true)), 0, $length);
}
function login($username, $password, $makehash=true) {
global $sql, $mod;
// SHA1 password
if($makehash) {
$password = sha1($password);
}
$res = mysql_query(sprintf(
"SELECT `id`,`type` FROM `mods` WHERE `username` = '%s' AND `password` = '%s' LIMIT 1",
mysql_real_escape_string($username),
$password
), $sql) or error(mysql_error($sql));
if($user = mysql_fetch_array($res)) {
return $mod = Array(
'id' => $user['id'],
'type' => $user['type'],
'username' => $username,
'password' => $password,
'hash' => mkhash()
);
} else return false;
}
function setCookies() {
global $mod;
if(!$mod) error('setCookies() was called for a non-moderator!');
// MOD_COOKIE contains username:hash
setcookie(MOD_COOKIE, $mod['username'] . ':' . $mod['hash'], time()+COOKIE_EXPIRE, JAIL_COOKIES?ROOT:'/', null, false, true);
// Put $mod in the session
$_SESSION['mod'] = $mod;
// Lock sessions to IP addresses
if(MOD_LOCK_IP)
$_SESSION['mod']['ip'] = $_SERVER['REMOTE_ADDR'];
}
function destroyCookies() {
// Delete the cookies
setcookie(MOD_COOKIE, 'deleted', time()-COOKIE_EXPIRE, JAIL_COOKIES?ROOT:'/', null, false, true);
// Unset the session
unset($_SESSION['mod']);
}
if(isset($_COOKIE['mod']) && isset($_SESSION['mod']) && is_array($_SESSION['mod'])) {
// Should be username:session hash
$cookie = explode(':', $_COOKIE['mod']);
if(count($cookie) != 2) {
destroyCookies();
error(ERROR_MALFORMED);
}
// Validate session
if( $cookie[0] != $_SESSION['mod']['username'] ||
$cookie[1] != $_SESSION['mod']['hash']) {
// Malformed cookies
destroyCookies();
error(ERROR_MALFORMED);
}
// Open connection
sql_open();
// Check username/password
if(!login($_SESSION['mod']['username'], $_SESSION['mod']['password'], false)) {
destroyCookies();
error(ERROR_INVALIDAFTER);
}
$mod = $_SESSION['mod'];
}
?>
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