216 lines
6.1 KiB
PHP
216 lines
6.1 KiB
PHP
<?php
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/*
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* Copyright (c) 2010-2013 Tinyboard Development Group
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*/
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defined('TINYBOARD') or exit;
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// create a hash/salt pair for validate logins
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function mkhash($username, $password, $salt = false) {
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global $config;
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if (!$salt) {
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// create some sort of salt for the hash
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$salt = substr(base64_encode(sha1(rand() . time(), true) . $config['cookies']['salt']), 0, 15);
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$generated_salt = true;
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}
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// generate hash (method is not important as long as it's strong)
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$hash = substr(
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base64_encode(
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md5(
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$username . $config['cookies']['salt'] . sha1(
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$username . $password . $salt . (
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$config['mod']['lock_ip'] ? $_SERVER['REMOTE_ADDR'] : ''
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), true
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) . sha1($config['password_crypt_version']) // Log out users being logged in with older password encryption schema
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, true
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)
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), 0, 20
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);
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if (isset($generated_salt))
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return array($hash, $salt);
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else
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return $hash;
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}
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function crypt_password_old($password) {
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$salt = generate_salt();
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$password = hash('sha256', $salt . sha1($password));
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return array($salt, $password);
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}
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function crypt_password($password) {
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global $config;
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// `salt` database field is reused as a version value. We don't want it to be 0.
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$version = $config['password_crypt_version'] ? $config['password_crypt_version'] : 1;
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$new_salt = generate_salt();
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$password = crypt($password, $config['password_crypt'] . $new_salt . "$");
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return array($version, $password);
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}
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function test_password($password, $salt, $test) {
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global $config;
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// Version = 0 denotes an old password hashing schema. In the same column, the
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// password hash was kept previously
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$version = (strlen($salt) <= 8) ? (int) $salt : 0;
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if ($version == 0) {
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$comp = hash('sha256', $salt . sha1($test));
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}
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else {
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$comp = crypt($test, $password);
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}
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return array($version, hash_equals($password, $comp));
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}
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function generate_salt() {
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// 128 bits of entropy
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return strtr(base64_encode(mcrypt_create_iv(16, MCRYPT_DEV_URANDOM)), '+', '.');
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}
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function login($username, $password) {
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global $mod, $config;
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$query = prepare("SELECT `id`, `type`, `boards`, `password`, `version` FROM ``mods`` WHERE `username` = :username");
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$query->bindValue(':username', $username);
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$query->execute() or error(db_error($query));
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if ($user = $query->fetch(PDO::FETCH_ASSOC)) {
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list($version, $ok) = test_password($user['password'], $user['version'], $password);
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if ($ok) {
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if ($config['password_crypt_version'] > $version) {
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// It's time to upgrade the password hashing method!
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list ($user['version'], $user['password']) = crypt_password($password);
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$query = prepare("UPDATE ``mods`` SET `password` = :password, `version` = :version WHERE `id` = :id");
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$query->bindValue(':password', $user['password']);
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$query->bindValue(':version', $user['version']);
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$query->bindValue(':id', $user['id']);
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$query->execute() or error(db_error($query));
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}
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return $mod = array(
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'id' => $user['id'],
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'type' => $user['type'],
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'username' => $username,
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'hash' => mkhash($username, $user['password']),
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'boards' => explode(',', $user['boards'])
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);
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}
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}
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return false;
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}
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function setCookies() {
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global $mod, $config;
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if (!$mod)
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error('setCookies() was called for a non-moderator!');
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setcookie($config['cookies']['mod'],
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$mod['username'] . // username
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':' .
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$mod['hash'][0] . // password
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':' .
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$mod['hash'][1], // salt
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time() + $config['cookies']['expire'], $config['cookies']['jail'] ? $config['cookies']['path'] : '/', null, !empty($_SERVER['HTTPS']) && $_SERVER['HTTPS'] != 'off', $config['cookies']['httponly']);
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}
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function destroyCookies() {
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global $config;
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// Delete the cookies
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setcookie($config['cookies']['mod'], 'deleted', time() - $config['cookies']['expire'], $config['cookies']['jail']?$config['cookies']['path'] : '/', null, !empty($_SERVER['HTTPS']) && $_SERVER['HTTPS'] != 'off', true);
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}
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function modLog($action, $_board=null) {
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global $mod, $board, $config;
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$query = prepare("INSERT INTO ``modlogs`` VALUES (:id, :ip, :board, :time, :text)");
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$query->bindValue(':id', $mod['id'], PDO::PARAM_INT);
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$query->bindValue(':ip', $_SERVER['REMOTE_ADDR']);
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$query->bindValue(':time', time(), PDO::PARAM_INT);
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$query->bindValue(':text', $action);
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if (isset($_board))
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$query->bindValue(':board', $_board);
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elseif (isset($board))
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$query->bindValue(':board', $board['uri']);
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else
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$query->bindValue(':board', null, PDO::PARAM_NULL);
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$query->execute() or error(db_error($query));
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if ($config['syslog'])
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_syslog(LOG_INFO, '[mod/' . $mod['username'] . ']: ' . $action);
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}
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// Validate session
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if (isset($_COOKIE[$config['cookies']['mod']])) {
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// Should be username:hash:salt
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$cookie = explode(':', $_COOKIE[$config['cookies']['mod']]);
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if (count($cookie) != 3) {
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// Malformed cookies
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destroyCookies();
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mod_login();
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exit;
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}
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$query = prepare("SELECT `id`, `type`, `boards`, `password` FROM ``mods`` WHERE `username` = :username");
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$query->bindValue(':username', $cookie[0]);
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$query->execute() or error(db_error($query));
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$user = $query->fetch(PDO::FETCH_ASSOC);
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// validate password hash
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if ($cookie[1] !== mkhash($cookie[0], $user['password'], $cookie[2])) {
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// Malformed cookies
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destroyCookies();
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mod_login();
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exit;
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}
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$mod = array(
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'id' => $user['id'],
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'type' => $user['type'],
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'username' => $cookie[0],
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'boards' => explode(',', $user['boards'])
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);
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}
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function create_pm_header() {
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global $mod, $config;
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if ($config['cache']['enabled'] && ($header = cache::get('pm_unread_' . $mod['id'])) != false) {
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if ($header === true)
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return false;
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return $header;
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}
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$query = prepare("SELECT `id` FROM ``pms`` WHERE `to` = :id AND `unread` = 1");
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$query->bindValue(':id', $mod['id'], PDO::PARAM_INT);
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$query->execute() or error(db_error($query));
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if ($pm = $query->fetch(PDO::FETCH_ASSOC))
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$header = array('id' => $pm['id'], 'waiting' => $query->rowCount() - 1);
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else
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$header = true;
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if ($config['cache']['enabled'])
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cache::set('pm_unread_' . $mod['id'], $header);
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if ($header === true)
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return false;
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return $header;
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}
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function make_secure_link_token($uri) {
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global $mod, $config;
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return substr(sha1($config['cookies']['salt'] . '-' . $uri . '-' . $mod['id']), 0, 8);
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}
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