feat(security): 新增网站安全扩展模块并支持修改手机脱敏验证
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<?php
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/**
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* 网站安全:安全加固开关、内容防刷限制与验证错误频率限制。
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*
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* 对应后台「扩展&增强 → 网站安全」设置(ExtensionRuntime::get_security_settings()),
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* 行为对齐参考主题 zib-theme.php / action/function.php 的安全套件。
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*
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* @package AKSRT
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*/
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namespace AKSRT\Extensions;
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defined('ABSPATH') || exit;
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class SecurityHardening {
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private static $instance = null;
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public static function get_instance(): self {
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if (null === self::$instance) {
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self::$instance = new self();
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}
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return self::$instance;
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}
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public function init(): void {
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$settings = \AKSRT\Settings\ExtensionRuntime::get_security_settings();
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if (!empty($settings['security_disabled_xmlrpc'])) {
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add_filter('xmlrpc_enabled', '__return_false');
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add_filter('xmlrpc_methods', '__return_empty_array');
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}
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if (!empty($settings['security_disabled_pingback'])) {
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add_action('pre_ping', [$this, 'disable_self_pingback']);
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}
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if (!empty($settings['security_user_disable_admin'])) {
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add_action('admin_init', [$this, 'restrict_admin_access']);
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}
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}
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/**
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* 防 pingback 攻击:移除指向自己站点的 pingback。
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*/
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public function disable_self_pingback(array &$links): void {
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$home = home_url();
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foreach ($links as $index => $link) {
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if (0 === strpos((string) $link, $home)) {
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unset($links[$index]);
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}
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}
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}
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/**
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* 非管理员禁止进入后台(放行 admin-ajax 与定时任务)。
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*/
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public function restrict_admin_access(): void {
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if (wp_doing_ajax() || wp_doing_cron()) {
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return;
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}
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if (!is_user_logged_in() || current_user_can('manage_options')) {
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return;
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}
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wp_safe_redirect(home_url('/'));
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exit;
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}
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/**
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* 内容防刷限制:检查并计数(10 分钟窗口 + 当天两个维度,0 = 不限制)。
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*
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* @param string $scope post|comment|upload|register|order
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* @param string $subject 用户 ID 或 IP 等限流主体
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* @param int $cap_10 10 分钟上限
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* @param int $cap_day 一天上限
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* @return true|string true = 放行(并计数),字符串 = 拒绝原因
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*/
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public static function brush_allow(string $scope, string $subject, int $cap_10, int $cap_day) {
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if ($cap_10 <= 0 && $cap_day <= 0) {
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return true;
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}
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$scope = sanitize_key($scope);
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$hash = md5((string) $subject);
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$minute_key = sprintf('aksrt_brush_%s_m_%s_%s%d', $scope, $hash, wp_date('YmdH'), intdiv((int) wp_date('i'), 10));
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$day_key = sprintf('aksrt_brush_%s_d_%s_%s', $scope, $hash, wp_date('Ymd'));
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if ($cap_10 > 0 && (int) get_transient($minute_key) >= $cap_10) {
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return __('操作过于频繁,请稍后再试', 'aksrt');
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}
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if ($cap_day > 0 && (int) get_transient($day_key) >= $cap_day) {
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return __('今日操作次数已达上限,请明天再试', 'aksrt');
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}
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if ($cap_10 > 0) {
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set_transient($minute_key, (int) get_transient($minute_key) + 1, 10 * MINUTE_IN_SECONDS);
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}
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if ($cap_day > 0) {
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set_transient($day_key, (int) get_transient($day_key) + 1, DAY_IN_SECONDS);
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}
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return true;
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}
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/**
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* 错误频率限制:返回下一次验证需等待的秒数(0 = 可立即验证)。
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* 错误超过 5 次限 30 秒一次,超过 10 次限 3 分钟一次。
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*/
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public static function error_frequency_wait(): int {
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$settings = \AKSRT\Settings\ExtensionRuntime::get_security_settings();
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if (empty($settings['security_error_frequency_limit'])) {
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return 0;
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}
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$state = get_transient(self::error_frequency_key());
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if (!is_array($state)) {
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return 0;
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}
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$count = (int) ($state['count'] ?? 0);
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$last = (int) ($state['last'] ?? 0);
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if ($count < 5) {
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return 0;
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}
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$remaining = ($count >= 10 ? 180 : 30) - (time() - $last);
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return $remaining > 0 ? $remaining : 0;
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}
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/** 记录一次验证失败(滑动 10 分钟窗口)。 */
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public static function error_frequency_record(): void {
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$settings = \AKSRT\Settings\ExtensionRuntime::get_security_settings();
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if (empty($settings['security_error_frequency_limit'])) {
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return;
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}
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$key = self::error_frequency_key();
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$state = get_transient($key);
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$count = is_array($state) ? (int) ($state['count'] ?? 0) + 1 : 1;
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set_transient($key, ['count' => $count, 'last' => time()], 10 * MINUTE_IN_SECONDS);
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}
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/** 验证成功后清除错误计数。 */
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public static function error_frequency_clear(): void {
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delete_transient(self::error_frequency_key());
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}
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private static function error_frequency_key(): string {
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$ip = function_exists('aksrt_get_client_ip') ? aksrt_get_client_ip() : (string) ($_SERVER['REMOTE_ADDR'] ?? '');
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return 'aksrt_err_freq_' . md5((string) get_current_user_id() . '|' . $ip);
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}
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}
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