Go Standard Library Cookbook

How to do it...

1. Open the console and create the folder chapter03/recipe12.
2. Navigate to the directory.

3. Create the content.dat file with the following content:

        This is content to check

4. Create the checksum.go file with the following content:

        package main        import (          "crypto/md5"          "fmt"          "io"          "os"        )        var content = "This is content to check"         func main() {          checksum := MD5(content)          checksum2 := FileMD5("content.dat")          fmt.Printf("Checksum 1: %s\n", checksum)          fmt.Printf("Checksum 2: %s\n", checksum2)          if checksum == checksum2 {            fmt.Println("Content matches!!!")          }        }        // MD5 creates the md5        // hash for given content encoded in        // hex string        func MD5(data string) string {          h := md5.Sum([]byte(data))          return fmt.Sprintf("%x", h)        } // FileMD5 creates hex ...