// +build ignore

package main

import (
	"crypto/rand"
	"crypto/rsa"
	"crypto/x509"
	"encoding/pem"
	"os"
)

func main() {

	f1, err := os.Create("sample_key.priv")
	if err != nil {
		panic(err)
	}
	f2, err := os.Create("sample_key.pub")
	if err != nil {
		panic(err)
	}

	privateKey, err := rsa.GenerateKey(rand.Reader, 2048)
	if err != nil {
		panic(err)
	}

	privateKeyDer := x509.MarshalPKCS1PrivateKey(privateKey)
	privateKeyBlock := pem.Block{
		Type:    "RSA PRIVATE KEY",
		Headers: nil,
		Bytes:   privateKeyDer,
	}
	pem.Encode(f1, &privateKeyBlock)

	publicKey := privateKey.PublicKey
	publicKeyDer, err := x509.MarshalPKIXPublicKey(&publicKey)
	if err != nil {
		panic(err)
	}

	publicKeyBlock := pem.Block{
		Type:    "PUBLIC KEY",
		Headers: nil,
		Bytes:   publicKeyDer,
	}
	pem.Encode(f2, &publicKeyBlock)

	f1.Close()
	f2.Close()
}