Book Image

Security with Go

By : John Daniel Leon
Book Image

Security with Go

By: John Daniel Leon

Overview of this book

Go is becoming more and more popular as a language for security experts. Its wide use in server and cloud environments, its speed and ease of use, and its evident capabilities for data analysis, have made it a prime choice for developers who need to think about security. Security with Go is the first Golang security book, and it is useful for both blue team and red team applications. With this book, you will learn how to write secure software, monitor your systems, secure your data, attack systems, and extract information. Defensive topics include cryptography, forensics, packet capturing, and building secure web applications. Offensive topics include brute force, port scanning, packet injection, web scraping, social engineering, and post exploitation techniques.
Table of Contents (15 chapters)

Getting a list of network devices

Part of the pcap library includes a function for getting a list of network devices.

This program will simply get a list of network devices and list their information. In Linux, a common default device name is eth0 or wlan0. On a Mac, it is en0. In Windows, the names are not pronounceable because they are much longer and represent a unique ID. You use the device name as a string to identify the device to capture from in later examples. You may need to run the example with administrative privileges (for example, sudo) if you don't see the lists of the exact devices.

The equivalent tcpdump command to list devices is as follows:

tcpdump -D

Alternatively, you can use this command:

tcpdump --list-interfaces

You can also use utilities such as ifconfig and ip to get the names of your network devices:

package main

import (