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ammended mod authentication system (no more $_SESSION)

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This commit is contained in:
Savetheinternet 2011-12-02 15:11:13 +11:00
parent 313012f034
commit c1be29ce35
3 changed files with 71 additions and 68 deletions
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111
inc/mod.php
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@ -5,13 +5,24 @@
exit;
}
// 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, $length);
// create a hash/salt pair for validate logins
function mkhash($username, $password, $salt = false) {
global $config;
if(!$salt) {
// create some sort of salt for the hash
$salt = substr(base64_encode(sha1(rand() . time(), true) . $config['cookies']['salt']), 0, 15);
$generated_salt = true;
}
// generate hash (method is not important as long as it's strong)
$hash = substr(base64_encode(md5($username . sha1($username . $password . $salt . ($config['mod']['lock_ip'] ? $_SERVER['REMOTE_ADDR'] : ''), true), true)), 0, 20);
if(isset($generated_salt))
return Array($hash, $salt);
else
return $hash;
}
function hasPermission($action = null, $board = null, $_mod = null) {
@ -52,8 +63,7 @@
'id' => $user['id'],
'type' => $user['type'],
'username' => $username,
'password' => $password,
'hash' => isset($_SESSION['mod']['hash']) ? $_SESSION['mod']['hash'] : mkhash(),
'hash' => mkhash($username, $password),
'boards' => explode(',', $user['boards'])
);
} else return false;
@ -61,26 +71,22 @@
function setCookies() {
global $mod, $config;
if(!$mod) error('setCookies() was called for a non-moderator!');
if(!$mod)
error('setCookies() was called for a non-moderator!');
// $config['cookies']['mod'] contains username:hash
setcookie($config['cookies']['mod'], $mod['username'] . ':' . $mod['hash'], time()+$config['cookies']['expire'], $config['cookies']['jail']?$config['cookies']['path']:'/', null, false, true);
// Put $mod in the session
$_SESSION['mod'] = $mod;
// Lock sessions to IP addresses
if($config['mod']['lock_ip'])
$_SESSION['mod']['ip'] = $_SERVER['REMOTE_ADDR'];
setcookie($config['cookies']['mod'],
$mod['username'] . // username
':' .
$mod['hash'][0] . // password
':' .
$mod['hash'][1], // salt
time() + $config['cookies']['expire'], $config['cookies']['jail'] ? $config['cookies']['path'] : '/', null, false, true);
}
function destroyCookies() {
global $config;
// Delete the cookies
setcookie($config['cookies']['mod'], 'deleted', time()-$config['cookies']['expire'], $config['cookies']['jail']?$config['cookies']['path']:'/', null, false, true);
// Unset the session
unset($_SESSION['mod']);
setcookie($config['cookies']['mod'], 'deleted', time() - $config['cookies']['expire'], $config['cookies']['jail']?$config['cookies']['path'] : '/', null, false, true);
}
function create_pm_header() {
@ -112,33 +118,6 @@
$query->execute() or error(db_error($query));
}
if(isset($_COOKIE[$config['cookies']['mod']]) && isset($_SESSION['mod']) && is_array($_SESSION['mod'])) {
// Should be username:session hash
$cookie = explode(':', $_COOKIE[$config['cookies']['mod']]);
if(count($cookie) != 2) {
destroyCookies();
error($config['error']['malformed']);
}
// Validate session
if( $cookie[0] != $_SESSION['mod']['username'] ||
$cookie[1] != $_SESSION['mod']['hash']) {
// Malformed cookies
destroyCookies();
error($config['error']['malformed']);
}
// Open connection
sql_open();
// Check username/password
if(!login($_SESSION['mod']['username'], $_SESSION['mod']['password'], false)) {
destroyCookies();
error($config['error']['invalidafter']);
}
}
// Generates a <ul> element with a list of linked
// boards and their subtitles. (without the <ul> opening and ending tags)
function ulBoards() {
@ -288,4 +267,34 @@
//}
}
?>
// Validate session
if(isset($_COOKIE[$config['cookies']['mod']])) {
// Should be username:hash:salt
$cookie = explode(':', $_COOKIE[$config['cookies']['mod']]);
if(count($cookie) != 3) {
destroyCookies();
error($config['error']['malformed']);
}
$query = prepare("SELECT `id`, `type`, `boards`, `password` FROM `mods` WHERE `username` = :username LIMIT 1");
$query->bindValue(':username', $cookie[0]);
$query->execute() or error(db_error($query));
$user = $query->fetch();
// validate password hash
if($cookie[1] != mkhash($cookie[0], $user['password'], $cookie[2])) {
// Malformed cookies
destroyCookies();
error($config['error']['malformed']);
}
$mod = Array(
'id' => $user['id'],
'type' => $user['type'],
'username' => $cookie[0],
'boards' => explode(',', $user['boards'])
);
}