mirror of
https://github.com/shadow1ng/fscan.git
synced 2025-06-02 03:30:21 +00:00
325 lines
7.8 KiB
Go
325 lines
7.8 KiB
Go
package Plugins
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import (
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"bufio"
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"context"
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"crypto/tls"
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"fmt"
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"github.com/shadow1ng/fscan/Common"
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"io"
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"net"
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"strings"
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"sync"
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"time"
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)
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// IMAPCredential 表示一个IMAP凭据
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type IMAPCredential struct {
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Username string
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Password string
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}
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// IMAPScanResult 表示IMAP扫描结果
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type IMAPScanResult struct {
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Success bool
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Error error
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Credential IMAPCredential
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}
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// IMAPScan 主扫描函数
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func IMAPScan(info *Common.HostInfo) error {
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if Common.DisableBrute {
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return nil
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}
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target := fmt.Sprintf("%v:%v", info.Host, info.Ports)
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Common.LogDebug(fmt.Sprintf("开始扫描 %s", target))
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// 设置全局超时上下文
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ctx, cancel := context.WithTimeout(context.Background(), time.Duration(Common.GlobalTimeout)*time.Second)
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defer cancel()
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// 构建凭据列表
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var credentials []IMAPCredential
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for _, user := range Common.Userdict["imap"] {
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for _, pass := range Common.Passwords {
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actualPass := strings.Replace(pass, "{user}", user, -1)
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credentials = append(credentials, IMAPCredential{
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Username: user,
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Password: actualPass,
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})
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}
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}
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Common.LogDebug(fmt.Sprintf("开始尝试用户名密码组合 (总用户数: %d, 总密码数: %d, 总组合数: %d)",
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len(Common.Userdict["imap"]), len(Common.Passwords), len(credentials)))
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// 并发扫描
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result := concurrentIMAPScan(ctx, info, credentials, Common.Timeout, Common.MaxRetries)
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if result != nil {
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// 记录成功结果
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saveIMAPResult(info, target, result.Credential)
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return nil
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}
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// 检查是否因为全局超时而退出
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select {
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case <-ctx.Done():
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Common.LogDebug("IMAP扫描全局超时")
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return fmt.Errorf("全局超时")
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default:
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Common.LogDebug(fmt.Sprintf("扫描完成，共尝试 %d 个组合", len(credentials)))
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return nil
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}
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}
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// concurrentIMAPScan 并发扫描IMAP服务
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func concurrentIMAPScan(ctx context.Context, info *Common.HostInfo, credentials []IMAPCredential, timeoutSeconds int64, maxRetries int) *IMAPScanResult {
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// 使用ModuleThreadNum控制并发数
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maxConcurrent := Common.ModuleThreadNum
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if maxConcurrent <= 0 {
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maxConcurrent = 10 // 默认值
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}
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if maxConcurrent > len(credentials) {
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maxConcurrent = len(credentials)
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}
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// 创建工作池
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var wg sync.WaitGroup
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resultChan := make(chan *IMAPScanResult, 1)
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workChan := make(chan IMAPCredential, maxConcurrent)
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scanCtx, scanCancel := context.WithCancel(ctx)
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defer scanCancel()
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// 启动工作协程
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for i := 0; i < maxConcurrent; i++ {
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wg.Add(1)
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go func() {
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defer wg.Done()
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for credential := range workChan {
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select {
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case <-scanCtx.Done():
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return
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default:
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result := tryIMAPCredential(scanCtx, info, credential, timeoutSeconds, maxRetries)
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if result.Success {
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select {
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case resultChan <- result:
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scanCancel() // 找到有效凭据，取消其他工作
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default:
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}
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return
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}
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}
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}
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}()
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}
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// 发送工作
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go func() {
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for i, cred := range credentials {
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select {
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case <-scanCtx.Done():
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break
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default:
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Common.LogDebug(fmt.Sprintf("[%d/%d] 尝试: %s:%s", i+1, len(credentials), cred.Username, cred.Password))
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workChan <- cred
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}
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}
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close(workChan)
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}()
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// 等待结果或完成
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go func() {
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wg.Wait()
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close(resultChan)
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}()
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// 获取结果，考虑全局超时
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select {
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case result, ok := <-resultChan:
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if ok && result != nil && result.Success {
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return result
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}
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return nil
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case <-ctx.Done():
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Common.LogDebug("IMAP并发扫描全局超时")
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scanCancel() // 确保取消所有未完成工作
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return nil
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}
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}
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// tryIMAPCredential 尝试单个IMAP凭据
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func tryIMAPCredential(ctx context.Context, info *Common.HostInfo, credential IMAPCredential, timeoutSeconds int64, maxRetries int) *IMAPScanResult {
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var lastErr error
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for retry := 0; retry < maxRetries; retry++ {
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select {
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case <-ctx.Done():
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return &IMAPScanResult{
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Success: false,
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Error: fmt.Errorf("全局超时"),
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Credential: credential,
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}
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default:
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if retry > 0 {
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Common.LogDebug(fmt.Sprintf("第%d次重试: %s:%s", retry+1, credential.Username, credential.Password))
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time.Sleep(500 * time.Millisecond) // 重试前等待
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}
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// 创建单个连接超时的上下文
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connCtx, cancel := context.WithTimeout(ctx, time.Duration(timeoutSeconds)*time.Second)
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success, err := IMAPConn(connCtx, info, credential.Username, credential.Password)
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cancel()
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if success {
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return &IMAPScanResult{
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Success: true,
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Credential: credential,
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}
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}
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lastErr = err
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if err != nil {
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// 检查是否需要重试
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if retryErr := Common.CheckErrs(err); retryErr == nil {
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break // 不需要重试的错误
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}
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}
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}
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}
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return &IMAPScanResult{
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Success: false,
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Error: lastErr,
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Credential: credential,
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}
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}
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// IMAPConn 连接测试函数
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func IMAPConn(ctx context.Context, info *Common.HostInfo, user string, pass string) (bool, error) {
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host, port := info.Host, info.Ports
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timeout := time.Duration(Common.Timeout) * time.Second
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addr := fmt.Sprintf("%s:%s", host, port)
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// 创建结果通道
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resultChan := make(chan struct {
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success bool
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err error
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}, 1)
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// 在协程中尝试连接
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go func() {
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// 先尝试普通连接
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dialer := &net.Dialer{Timeout: timeout}
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conn, err := dialer.DialContext(ctx, "tcp", addr)
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if err == nil {
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flag, authErr := tryIMAPAuth(conn, user, pass, timeout)
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conn.Close()
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if authErr == nil {
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select {
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case <-ctx.Done():
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case resultChan <- struct {
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success bool
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err error
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}{flag, nil}:
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}
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return
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}
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}
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// 如果普通连接失败或认证失败，尝试TLS连接
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tlsConfig := &tls.Config{
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InsecureSkipVerify: true,
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}
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tlsConn, tlsErr := tls.DialWithDialer(dialer, "tcp", addr, tlsConfig)
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if tlsErr != nil {
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select {
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case <-ctx.Done():
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case resultChan <- struct {
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success bool
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err error
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}{false, fmt.Errorf("连接失败: %v", tlsErr)}:
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}
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return
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}
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defer tlsConn.Close()
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flag, authErr := tryIMAPAuth(tlsConn, user, pass, timeout)
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select {
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case <-ctx.Done():
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case resultChan <- struct {
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success bool
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err error
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}{flag, authErr}:
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}
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}()
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// 等待结果或上下文取消
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select {
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case result := <-resultChan:
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return result.success, result.err
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case <-ctx.Done():
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return false, ctx.Err()
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}
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}
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// tryIMAPAuth 尝试IMAP认证
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func tryIMAPAuth(conn net.Conn, user string, pass string, timeout time.Duration) (bool, error) {
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conn.SetDeadline(time.Now().Add(timeout))
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reader := bufio.NewReader(conn)
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_, err := reader.ReadString('\n')
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if err != nil {
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return false, fmt.Errorf("读取欢迎消息失败: %v", err)
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}
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loginCmd := fmt.Sprintf("a001 LOGIN \"%s\" \"%s\"\r\n", user, pass)
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_, err = conn.Write([]byte(loginCmd))
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if err != nil {
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return false, fmt.Errorf("发送登录命令失败: %v", err)
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}
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for {
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conn.SetDeadline(time.Now().Add(timeout))
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response, err := reader.ReadString('\n')
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if err != nil {
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if err == io.EOF {
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return false, fmt.Errorf("认证失败")
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}
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return false, fmt.Errorf("读取响应失败: %v", err)
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}
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if strings.Contains(response, "a001 OK") {
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return true, nil
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}
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if strings.Contains(response, "a001 NO") || strings.Contains(response, "a001 BAD") {
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return false, fmt.Errorf("认证失败")
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}
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}
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}
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// saveIMAPResult 保存IMAP扫描结果
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func saveIMAPResult(info *Common.HostInfo, target string, credential IMAPCredential) {
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successMsg := fmt.Sprintf("IMAP服务 %s 爆破成功 用户名: %v 密码: %v",
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target, credential.Username, credential.Password)
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Common.LogSuccess(successMsg)
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// 保存结果
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vulnResult := &Common.ScanResult{
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Time: time.Now(),
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Type: Common.VULN,
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Target: info.Host,
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Status: "vulnerable",
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Details: map[string]interface{}{
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"port": info.Ports,
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"service": "imap",
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"username": credential.Username,
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"password": credential.Password,
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"type": "weak-password",
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},
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}
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Common.SaveResult(vulnResult)
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}
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