for _, query := range unescapedQueries {
		keyval := strings.SplitN(query, "=", 2)
		if len(keyval) != 2 {
			return ErrInvalidQueryParams
		}
		switch keyval[0] {
		case xhttp.AmzAccessKeyID:
			accessKey = keyval[1]
		case xhttp.AmzSignatureV2:
			gotSignature = keyval[1]
		case xhttp.Expires:
			expires = keyval[1]
		default:
			filteredQueries = append(filteredQueries, query)
		}

     *
     * This will require that a keytab is configured in this service.
     *
     *
     */
    public JAASAuthenticator() {
        this("jcifs");
    }

    /**
     * Create an authenticator using the given JAAS service
     *
     * This will require that a keytab is configured in this service.
     *
     * @param serviceName