mirror of
https://github.com/vichan-devel/vichan.git
synced 2024-12-18 18:36:00 +01:00
279 lines
7.7 KiB
PHP
279 lines
7.7 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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use Vichan\Context;
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use Vichan\Functions\Net;
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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(string $username, string $password, mixed $salt = false): array|string {
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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 [ $hash, $salt ];
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} else {
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return $hash;
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}
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}
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function crypt_password(string $password): array {
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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 [ $version, $password ];
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}
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function test_password(string $password, string $salt, string $test): array {
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// Version = 0 denotes an old password hashing schema. In the same column, the
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// password hash was kept previously
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$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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} else {
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$comp = crypt($test, $password);
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}
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return [ $version, hash_equals($password, $comp) ];
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}
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function generate_salt(): string {
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return strtr(base64_encode(random_bytes(16)), '+', '.');
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}
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function calc_cookie_name(bool $is_https, bool $is_path_jailed, string $base_name): string {
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if ($is_https) {
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if ($is_path_jailed) {
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return "__Host-$base_name";
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} else {
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return "__Secure-$base_name";
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}
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} else {
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return $base_name;
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}
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}
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function login(string $username, string $password): array|false {
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global $mod, $config;
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$query = prepare("SELECT `id`, `type`, `boards`, `password`, `version` FROM ``mods`` WHERE BINARY `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 = [
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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(): void {
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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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}
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$is_https = Net\is_connection_secure($config['cookies']['secure_login_only'] === 1);
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$is_path_jailed = $config['cookies']['jail'];
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$name = calc_cookie_name($is_https, $is_path_jailed, $config['cookies']['mod']);
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// <username>:<password>:<salt>
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$value = "{$mod['username']}:{$mod['hash'][0]}:{$mod['hash'][1]}";
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$options = [
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'expires' => time() + $config['cookies']['expire'],
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'path' => $is_path_jailed ? $config['cookies']['path'] : '/',
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'secure' => $is_https,
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'httponly' => $config['cookies']['httponly'],
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'samesite' => 'Strict'
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];
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setcookie($name, $value, $options);
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}
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function destroyCookies(): void {
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global $config;
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$base_name = $config['cookies']['mod'];
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$del_time = time() - 60 * 60 * 24 * 365; // 1 year.
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$jailed_path = $config['cookies']['jail'] ? $config['cookies']['path'] : '/';
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$http_only = $config['cookies']['httponly'];
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$options_multi = [
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$base_name => [
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'expires' => $del_time,
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'path' => $jailed_path ,
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'secure' => false,
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'httponly' => $http_only,
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'samesite' => 'Strict'
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],
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"__Host-$base_name" => [
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'expires' => $del_time,
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'path' => $jailed_path,
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'secure' => true,
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'httponly' => $http_only,
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'samesite' => 'Strict'
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],
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"__Secure-$base_name" => [
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'expires' => $del_time,
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'path' => '/',
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'secure' => true,
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'httponly' => $http_only,
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'samesite' => 'Strict'
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]
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];
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foreach ($options_multi as $name => $options) {
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if (isset($_COOKIE[$name])) {
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setcookie($name, 'deleted', $options);
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unset($_COOKIE[$name]);
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}
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}
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}
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function modLog(string $action, ?string $_board = null): void {
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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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$query->bindValue(':id', (isset($mod['id']) ? $mod['id'] : -1), PDO::PARAM_INT);
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$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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}
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function create_pm_header(): mixed {
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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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}
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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 = [ 'id' => $pm['id'], 'waiting' => $query->rowCount() - 1 ];
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} else {
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$header = true;
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}
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if ($config['cache']['enabled']) {
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cache::set('pm_unread_' . $mod['id'], $header);
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}
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if ($header === true) {
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return false;
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}
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return $header;
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}
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function make_secure_link_token(string $uri): string {
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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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function check_login(Context $ctx, bool $prompt = false): void {
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global $config, $mod;
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$is_https = Net\is_connection_secure($config['cookies']['secure_login_only'] === 1);
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$is_path_jailed = $config['cookies']['jail'];
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$expected_cookie_name = calc_cookie_name($is_https, $is_path_jailed, $config['cookies']['mod']);
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// Validate session
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if (isset($_COOKIE[$expected_cookie_name])) {
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// Should be username:hash:salt
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$cookie = explode(':', $_COOKIE[$expected_cookie_name]);
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if (count($cookie) != 3) {
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// Malformed cookies
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destroyCookies();
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if ($prompt) {
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mod_login($ctx);
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}
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exit;
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}
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$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'], $cookie[2])) {
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// Malformed cookies
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destroyCookies();
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if ($prompt) {
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mod_login($ctx);
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}
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exit;
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}
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$mod = array(
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'id' => (int)$user['id'],
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'type' => (int)$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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}
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