package Plugins

import (
	"crypto/tls"
	"encoding/base64"
	"fmt"
	"github.com/shadow1ng/fscan/Common"
	"net/http"
	"strings"
	"time"
)

// ElasticScan 执行 Elasticsearch 服务扫描
func ElasticScan(info *Common.HostInfo) (tmperr error) {
	if Common.DisableBrute {
		return
	}

	starttime := time.Now().Unix()

	// 首先测试无认证访问
	flag, err := ElasticConn(info, "", "")
	if flag && err == nil {
		return err
	}

	// 尝试用户名密码组合
	for _, user := range Common.Userdict["elastic"] {
		for _, pass := range Common.Passwords {
			// 替换密码中的用户名占位符
			pass = strings.Replace(pass, "{user}", user, -1)

			flag, err := ElasticConn(info, user, pass)
			if flag && err == nil {
				return err
			}

			// 记录错误信息
			errlog := fmt.Sprintf("[-] Elasticsearch服务 %v:%v 尝试失败 用户名: %v 密码: %v 错误: %v", info.Host, info.Ports, user, pass, err)
			Common.LogError(errlog)
			tmperr = err

			if Common.CheckErrs(err) {
				return err
			}

			// 超时检查
			if time.Now().Unix()-starttime > (int64(len(Common.Userdict["elastic"])*len(Common.Passwords)) * Common.Timeout) {
				return err
			}
		}
	}
	return tmperr
}

// ElasticConn 尝试 Elasticsearch 连接
func ElasticConn(info *Common.HostInfo, user string, pass string) (bool, error) {
	host, port := info.Host, info.Ports
	timeout := time.Duration(Common.Timeout) * time.Second

	// 构造请求客户端
	client := &http.Client{
		Timeout: timeout,
		Transport: &http.Transport{
			TLSClientConfig: &tls.Config{InsecureSkipVerify: true},
		},
	}

	// 构造基础URL
	baseURL := fmt.Sprintf("http://%s:%s", host, port)

	// 创建请求
	req, err := http.NewRequest("GET", baseURL+"/_cat/indices", nil)
	if err != nil {
		return false, err
	}

	// 如果提供了认证信息,添加Basic认证头
	if user != "" || pass != "" {
		auth := base64.StdEncoding.EncodeToString([]byte(user + ":" + pass))
		req.Header.Add("Authorization", "Basic "+auth)
	}

	// 发送请求
	resp, err := client.Do(req)
	if err != nil {
		return false, err
	}
	defer resp.Body.Close()

	// 检查响应状态
	if resp.StatusCode == 200 {
		result := fmt.Sprintf("[+] Elasticsearch服务 %v:%v ", host, port)
		if user != "" {
			result += fmt.Sprintf("爆破成功 用户名: %v 密码: %v", user, pass)
		} else {
			result += "无需认证即可访问"
		}
		Common.LogSuccess(result)
		return true, nil
	}

	return false, fmt.Errorf("认证失败")
}