Generate a random key with crypto/rand

key.go

// Example to generate a random key with crypto/rand.
// It's useful to use it for example to prevent request forgery by comparing it
// inside requests.

package main

import (
	"crypto/rand"
	"fmt"
	"log"
)

func main() {
	key, err := generateKey()
	if err != nil {
		log.Fatal(err)
	}
	fmt.Println(key)
}

func generateKey() (string, error) {
	b := make([]byte, 32)
	_, err := rand.Read(b)
	if err != nil {
		return "", err
	}
	return fmt.Sprintf("%x", b), nil
}