织梦网站后台登陆页安全加强代码重置版

//只允许用户名和密码用0-9,a-z,A-Z,'@','_','.','-'这些字符
$userid = preg_replace("/[^0-9a-zA-Z_@!\.-]/", '', $userid);
$pwd = preg_replace("/[^0-9a-zA-Z_@!\.-]/", '', $pwd);

if(preg_match("#[^0-9a-zA-Z_@!\.-]#", $pwd) || preg_match("#[^0-9a-zA-Z_@!\.-]#", $userid))
{
    ShowMsg('密码或或用户名不合法，<br />请使用[0-9a-zA-Z_@!.-]内的字符！', '-1', 0, 3000);
    exit();
}
	
if($pwd!='' && !preg_match("#^(?=.*[0-9])(?=.*[a-z])(?=.*[A-Z]).*$#", $pwd))
{
    ShowMsg('密码必须包含1个数字，1个小写字母，1个大写字母！', '-1', 0, 3000);
    exit();
}
	
if($pwd!='' && !preg_match("#^.{8,128}$#", $pwd))
{
    ShowMsg('密码必须大于8位小于128位！', '-1', 0, 3000);
    exit();
}

<?php
/**
 * 后台登录
 *
 * @version        $Id: login.php 1 8:48 2010年7月13日 $
 * @package        DedeCMS.Administrator
 * @founder        IT柏拉图, https://weibo.com/itprato
 * @author         DedeCMS团队
 * @copyright      Copyright (c) 2004 - 2024, 上海卓卓网络科技有限公司 (DesDev, Inc.)
 * @license        http://help.dedecms.com/usersguide/license.html
 * @link           http://www.dedecms.com
 */
require_once(dirname(__FILE__).'/../include/common.inc.php');
require_once(DEDEINC.'/userlogin.class.php');
if(empty($dopost)) $dopost = '';
 
//登录检测
if($dopost=='login')
{
    $userid = isset($_POST['userid']) ? $_POST['userid'] : '';
    $pwd = isset($_POST['pwd']) ? $_POST['pwd'] : '';
 
    // 连续登录失败用户锁定
    $fail_limit = isset($cfg_fail_limit) ? $cfg_fail_limit : 3;//输错三次
    $lock_time = isset($cfg_lock_time) ? $cfg_lock_time : 86400;//锁定24小时
    $arr_login = array();
    $filename = DEDEDATA.'/login.data.php';
    if (file_exists($filename)) {
        require_once($filename);
        $arr_login = json_decode($str_login, true);
        if ($arr_login[$userid] != '') {
            $count = explode(',', $arr_login[$userid])[0];
            $timestamp = explode(',', $arr_login[$userid])[1];
            if ($count == $fail_limit && $timestamp + $lock_time > time()) {
                $date = date('Y-m-d H:i:s', $timestamp + $lock_time);
                ResetVdValue();
                ShowMsg("连续登录失败用户锁定！<br>解锁时间：{$date}", 'login.php', 0, 5000);
                exit();
            }
        }
    }
    // 连续登录失败用户锁定
 
    $validate = isset($_POST['validate']) ? strtolower(trim($_POST['validate'])) : '';
    $svali = strtolower(GetCkVdValue());
    if(($validate=='' || $validate != $svali) && preg_match("/6/",$safe_gdopen)){
        ResetVdValue();
        ShowMsg('验证码不正确!','login.php',0,1000);
        exit();
    } else {
        $cuserLogin = new userLogin();
        if(!empty($userid) && !empty($pwd))
        {
            //success
            $res = $cuserLogin->checkUser($userid,$pwd);
            if($res==1)
            {
                // 连续登录失败用户锁定
                $count = 0;
                $timestamp = time();
                $arr_login[$userid] = "{$count},{$timestamp}";
                $content = "<?php\r\n\$str_login='".json_encode($arr_login)."';\r\n?>";
                $fp = fopen($filename, 'w');
                fwrite($fp, $content);
                fclose($fp);
                // 连续登录失败用户锁定
                $cuserLogin->keepUser();
				ShowMsg('成功登录，正在转向管理管理主页！',"index.php");
                exit();
            }
            //error
            else if($res==-1)
            {
                ResetVdValue();
                ShowMsg('用户名或者密码错误!','login.php',0,1000);
                exit();
            }
            else
            {
                // 连续登录失败用户锁定
                $count = 1;
                $timestamp = time();
                if ($arr_login[$userid] != '') {
                    $count = explode(',', $arr_login[$userid])[0] + 1;
                    if ($count > $fail_limit) {
                        $count = 1;
                    }
                }
                $arr_login[$userid] = "{$count},{$timestamp}";
                $content = "<?php\r\n\$str_login='".json_encode($arr_login)."';\r\n?>";
                $fp = fopen($filename, 'w');
                fwrite($fp, $content);
                fclose($fp);
                // 连续登录失败用户锁定
                ResetVdValue();
                ShowMsg('用户名或者密码错误!','login.php',0,1000);
				exit();
            }
        }
 
        //password empty
        else
        {
            ResetVdValue();
            ShowMsg('用户名和密码没填写完整!','login.php',0,1000);
            exit();
        }
    }
}
 
include('templets/login.htm');