GOARCH="amd64"
GOHOSTARCH="amd64"
GOHOSTOS="linux"
GOOS="linux"

package main

import (
	"bytes"
	"encoding/base32"
	"fmt"
)

var input = []byte("foobar")

// Create a new base32 encoder, write src through it, and return the resulting
// string.
func thruEncoder(encoding *base32.Encoding, src []byte) string {
	var buf bytes.Buffer
	encoder := base32.NewEncoder(encoding, &buf)
	encoder.Write(src)
	encoder.Close()
	return buf.String()
}

func main() {
	withPadding := base32.StdEncoding
	withoutPadding := base32.StdEncoding.WithPadding(base32.NoPadding)

	fmt.Printf("   with padding EncodeToString: %q\n", withPadding.EncodeToString(input))
	fmt.Printf("   with padding NewEncoder    : %q\n", thruEncoder(withPadding, input))
	fmt.Printf("without padding EncodeToString: %q\n", withoutPadding.EncodeToString(input))
	fmt.Printf("without padding NewEncoder    : %q\n", thruEncoder(withoutPadding, input))
}

   with padding EncodeToString: "MZXW6YTBOI======"
   with padding NewEncoder    : "MZXW6YTBOI======"
without padding EncodeToString: "MZXW6YTBOI"
without padding NewEncoder    : "MZXW6YTBOI"

   with padding EncodeToString: "MZXW6YTBOI======"
   with padding NewEncoder    : "MZXW6YTBOI======"
without padding EncodeToString: "MZXW6YTBOI"
without padding NewEncoder    : "MZXW6YTBOIAAAAAA"