feat: 添加VNC扫描功能

Plugins/VNC.go

@@ -0,0 +1,81 @@
+package Plugins
+
+import (
+	"fmt"
+	"github.com/mitchellh/go-vnc"
+	"github.com/shadow1ng/fscan/Common"
+	"net"
+	"time"
+)
+
+// VncScan 执行VNC服务扫描及密码尝试
+func VncScan(info *Common.HostInfo) (tmperr error) {
+	// 如果已开启暴力破解则直接返回
+	if Common.IsBrute {
+		return
+	}
+
+	modename := "vnc"
+	starttime := time.Now().Unix()
+
+	// 遍历密码字典尝试连接
+	for _, pass := range Common.Passwords {
+		flag, err := VncConn(info, pass)
+
+		if flag && err == nil {
+			// 连接成功，记录结果
+			result := fmt.Sprintf("[+] %s://%v:%v 密码: %v", modename, info.Host, info.Ports, pass)
+			Common.LogSuccess(result)
+			return err
+		}
+
+		// 连接失败，记录错误信息
+		errlog := fmt.Sprintf("[-] %s://%v:%v 尝试密码: %v 错误: %v",
+			modename, info.Host, info.Ports, pass, err)
+		Common.LogError(errlog)
+		tmperr = err
+
+		// 检查是否需要中断扫描
+		if Common.CheckErrs(err) {
+			return err
+		}
+
+		// 检查是否超时
+		if time.Now().Unix()-starttime > (int64(len(Common.Passwords)) * Common.Timeout) {
+			return fmt.Errorf("扫描超时")
+		}
+	}
+	return tmperr
+}
+
+// VncConn 尝试建立VNC连接
+func VncConn(info *Common.HostInfo, pass string) (flag bool, err error) {
+	flag = false
+	Host, Port := info.Host, info.Ports
+
+	// 建立TCP连接
+	conn, err := net.DialTimeout("tcp", fmt.Sprintf("%s:%s", Host, Port),
+		time.Duration(Common.Timeout)*time.Second)
+	if err != nil {
+		return
+	}
+	defer conn.Close()
+
+	// 配置VNC客户端
+	config := &vnc.ClientConfig{
+		Auth: []vnc.ClientAuth{
+			&vnc.PasswordAuth{
+				Password: pass,
+			},
+		},
+	}
+
+	// 尝试VNC认证
+	client, err := vnc.Client(conn, config)
+	if err == nil {
+		defer client.Close()
+		flag = true
+	}
+
+	return
+}