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)

Reading and writing

Reading and writing files can be done in numerous ways. Go provides interfaces that make it easy to write your own functions that work with files or any other reader/writer interface.

Between the os, io, and ioutil packages, you can find the right function for your needs. These examples cover a number of the options available.

Copying a file

The following example uses the io.Copy() function to copy the contents from one reader to another writer:

package main 
 
import ( 
   "io" 
   "log" 
   "os" 
) 
 
func main() { 
   // Open original file 
   originalFile, err := os.Open("test.txt") 
   if err != nil { 
      log.Fatal(err) 
   } 
   defer originalFile.Close(...