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<?php
/*
* Copyright (c) 2010-2013 Tinyboard Development Group
*/
defined('TINYBOARD') or exit;
// 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 . $config['cookies']['salt'] . sha1(
$username . $password . $salt . (
$config['mod']['lock_ip'] ? $_SERVER['REMOTE_ADDR'] : ''
), true
) . sha1($config['password_crypt_version']) // Log out users being logged in with older password encryption schema
, true
)
), 0, 20
);
if (isset($generated_salt))
return array($hash, $salt);
else
return $hash;
}
function crypt_password_old($password) {
$salt = generate_salt();
$password = hash('sha256', $salt . sha1($password));
return array($salt, $password);
}
function crypt_password($password) {
global $config;
// `salt` database field is reused as a version value. We don't want it to be 0.
$version = $config['password_crypt_version'] ? $config['password_crypt_version'] : 1;
$new_salt = generate_salt();
$password = crypt($password, $config['password_crypt'] . $new_salt . "$");
return array($version, $password);
}
function test_password($password, $salt, $test) {
global $config;
// Version = 0 denotes an old password hashing schema. In the same column, the
// password hash was kept previously
$version = (strlen($salt) <= 8) ? (int) $salt : 0;
if ($version == 0) {
$comp = hash('sha256', $salt . sha1($test));
}
else {
$comp = crypt($test, $password);
}
return array($version, hash_equals($password, $comp));
}
function generate_salt() {
// 128 bits of entropy
return strtr(base64_encode(mcrypt_create_iv(16, MCRYPT_DEV_URANDOM)), '+', '.');
}
function login($username, $password) {
global $mod, $config;
$query = prepare("SELECT `id`, `type`, `boards`, `password`, `version` FROM ``mods`` WHERE BINARY `username` = :username");
$query->bindValue(':username', $username);
$query->execute() or error(db_error($query));
if ($user = $query->fetch(PDO::FETCH_ASSOC)) {
list($version, $ok) = test_password($user['password'], $user['version'], $password);
if ($ok) {
if ($config['password_crypt_version'] > $version) {
// It's time to upgrade the password hashing method!
list ($user['version'], $user['password']) = crypt_password($password);
$query = prepare("UPDATE ``mods`` SET `password` = :password, `version` = :version WHERE `id` = :id");
$query->bindValue(':password', $user['password']);
$query->bindValue(':version', $user['version']);
$query->bindValue(':id', $user['id']);
$query->execute() or error(db_error($query));
}
return $mod = array(
'id' => $user['id'],
'type' => $user['type'],
'username' => $username,
'hash' => mkhash($username, $user['password']),
'boards' => explode(',', $user['boards'])
);
}
}
return false;
}
function setCookies() {
global $mod, $config;
if (!$mod)
error('setCookies() was called for a non-moderator!');
setcookie($config['cookies']['mod'],
$mod['username'] . // username
':' .
$mod['hash'][0] . // password
':' .
$mod['hash'][1], // salt
time() + $config['cookies']['expire'], $config['cookies']['jail'] ? $config['cookies']['path'] : '/', null, !empty($_SERVER['HTTPS']) && $_SERVER['HTTPS'] != 'off', $config['cookies']['httponly']);
}
function destroyCookies() {
global $config;
// Delete the cookies
setcookie($config['cookies']['mod'], 'deleted', time() - $config['cookies']['expire'], $config['cookies']['jail']?$config['cookies']['path'] : '/', null, !empty($_SERVER['HTTPS']) && $_SERVER['HTTPS'] != 'off', true);
}
function modLog($action, $_board=null) {
global $mod, $board, $config;
$query = prepare("INSERT INTO ``modlogs`` VALUES (:id, :ip, :board, :time, :text)");
$query->bindValue(':id', $mod['id'], PDO::PARAM_INT);
$query->bindValue(':ip', $_SERVER['REMOTE_ADDR']);
$query->bindValue(':time', time(), PDO::PARAM_INT);
$query->bindValue(':text', $action);
if (isset($_board))
$query->bindValue(':board', $_board);
elseif (isset($board))
$query->bindValue(':board', $board['uri']);
else
$query->bindValue(':board', null, PDO::PARAM_NULL);
$query->execute() or error(db_error($query));
if ($config['syslog'])
_syslog(LOG_INFO, '[mod/' . $mod['username'] . ']: ' . $action);
}
// Validate session
if (isset($_COOKIE[$config['cookies']['mod']])) {
// Should be username:hash:salt
$cookie = explode(':', $_COOKIE[$config['cookies']['mod']]);
if (count($cookie) != 3) {
// Malformed cookies
destroyCookies();
mod_login();
exit;
}
$query = prepare("SELECT `id`, `type`, `boards`, `password` FROM ``mods`` WHERE `username` = :username");
$query->bindValue(':username', $cookie[0]);
$query->execute() or error(db_error($query));
$user = $query->fetch(PDO::FETCH_ASSOC);
// validate password hash
if ($cookie[1] !== mkhash($cookie[0], $user['password'], $cookie[2])) {
// Malformed cookies
destroyCookies();
mod_login();
exit;
}
$mod = array(
'id' => $user['id'],
'type' => $user['type'],
'username' => $cookie[0],
'boards' => explode(',', $user['boards'])
);
}
function create_pm_header() {
global $mod, $config;
if ($config['cache']['enabled'] && ($header = cache::get('pm_unread_' . $mod['id'])) != false) {
if ($header === true)
return false;
return $header;
}
$query = prepare("SELECT `id` FROM ``pms`` WHERE `to` = :id AND `unread` = 1");
$query->bindValue(':id', $mod['id'], PDO::PARAM_INT);
$query->execute() or error(db_error($query));
if ($pm = $query->fetch(PDO::FETCH_ASSOC))
$header = array('id' => $pm['id'], 'waiting' => $query->rowCount() - 1);
else
$header = true;
if ($config['cache']['enabled'])
cache::set('pm_unread_' . $mod['id'], $header);
if ($header === true)
return false;
return $header;
}
function make_secure_link_token($uri) {
global $mod, $config;
return substr(sha1($config['cookies']['salt'] . '-' . $uri . '-' . $mod['id']), 0, 8);
}
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