lib/jwt.js
function hmacVerify (input, algorithm, secret, signature) {
  try {
    const verify = signature === hmacSign(input, algorithm, secret)
    if (!verify) {
      errorMap['006'].message = 'Unvalid secret for hmac verify, signature verification failed'
      errorMap['006'].error = new Error(errorMap['006'].message)
    }
    return verify
  } catch (e) {
    errorMap['006'].message = 'Exception error in hamc verify, signature verification failed'
    errorMap['006'].error = e
    return false
  }
}
function hmacVerify (input, algorithm, secret, signature) {
  try {
    const verify = signature === hmacSign(input, algorithm, secret)
    if (!verify) {
      errorMap['006'].message = 'Unvalid secret for hmac verify, signature verification failed'
      errorMap['006'].error = new Error(errorMap['006'].message)
    }
    return verify
  } catch (e) {
    errorMap['006'].message = 'Exception error in hamc verify, signature verification failed'
    errorMap['006'].error = e
    return false
  }
}
hamc verify signature
@param  {String} input      hamc verify input
@param  {String} algorithm  hamc verify algorithm
@param  {String} secret     hamc verify secret
@param  {String} signature  hamc verify signature
@return {Object}            hamc verify result