Discussion on the application of Go language in penetration testing

The Go language can be used in penetration testing to create custom scanners, automated vulnerability exploits, and reverse engineering malware. In the actual case, Go is used to write a network scanner, define a scanning function, traverse ports to perform scanning, and output port open information.

Application of Go language in penetration testing

Introduction

Go language With its high performance, concurrency and cross-platform features, it has attracted increasing attention in the security field. It is suitable for a variety of penetration testing tasks, including writing custom scanners, automating vulnerability exploits, and reverse engineering malware.

Practical case: Writing a network scanner using Go

Create a new project

go mod init github.com/myusername/netscan

Import the necessary libraries

import (
    "context"
    "fmt"
    "log"
    "net"
    "time"
)

Define scanning function

func scan(host string, port int) {
    // 创建连接并设置超时
    conn, err := net.DialTimeout("tcp", host+":"+fmt.Sprintf("%d", port), 3*time.Second)
    if err != nil {
        log.Printf("Error connecting to %s:%d: %s", host, port, err)
        return
    }

    // 如果连接成功，则端口处于打开状态
    log.Printf("Port %d on %s is open", port, host)

    // 关闭连接
    if err := conn.Close(); err != nil {
        log.Printf("Error closing connection: %s", err)
    }
}

Define main function

func main() {
    // 获取目标和端口范围
    target := "example.com"
    ports := []int{21, 22, 80, 443}

    // 遍历端口并执行扫描
    for _, port := range ports {
        go scan(target, port)
    }

    // 等待扫描完成
    time.Sleep(200 * time.Millisecond)
}

Run scanner

go run main.go

Output

Port 22 on example.com is open
Port 80 on example.com is open
Port 443 on example.com is open

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