/*
 * Copyright (C) 2024 Jonni Liljamo <jonni@liljamo.com>
 *
 * This file is licensed under AGPL-3.0-or-later, see NOTICE and LICENSE for
 * more information.
 */

package util

import (
	"encoding/base64"
	"math/rand"
)

const charsTsigKey = "abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ0123456789~!@#$%&*()+=_-'\"\\][{}/?"

// GenTsigKey returns a base64 tsig shared secret.
func GenTsigKey() string {
	b := make([]byte, 32)
	for i := range b {
		b[i] = charsTsigKey[rand.Int63()%int64(len(charsTsigKey))]
	}
	return base64.StdEncoding.EncodeToString(b)
}