import { createHmac, randomBytes } from 'node:crypto'

/**
 * TokenHelper
 *
 *  @author Björn Hase <me@herr-hase.wtf>
 *  @license hhttps://www.gnu.org/licenses/gpl-3.0.en.html GPL-3
 *  @link https://git.node001.net/HerrHase/signpost.git
 *
 */
const TokenHelper = {

    /**
     * create hash from token
     *
     * @param string token
     *
     * @return string
     * 
     */
    create(token) {
        const hmac = createHmac(process.env.APP_HASH_TYPE, process.env.APP_SALT)
        const buffer = new Buffer(token)
            
        return hmac.update(buffer).digest('base64')
    },

    /**
     * check if token and hash are equal
     * 
     * @param string token
     * @param string hash
     * 
     * @return boolean
     *
     */
    equal(token, hash) {
        return TokenHelper.create(token) === hash
    }
}

export default TokenHelper