001/*
002 * The contents of this file are subject to the terms of the Common Development and
003 * Distribution License (the License). You may not use this file except in compliance with the
004 * License.
005 *
006 * You can obtain a copy of the License at legal/CDDLv1.0.txt. See the License for the
007 * specific language governing permission and limitations under the License.
008 *
009 * When distributing Covered Software, include this CDDL Header Notice in each file and include
010 * the License file at legal/CDDLv1.0.txt. If applicable, add the following below the CDDL
011 * Header, with the fields enclosed by brackets [] replaced by your own identifying
012 * information: "Portions copyright [year] [name of copyright owner]".
013 *
014 * Copyright 2013-2015 ForgeRock AS.
015 */
016
017package org.forgerock.json.jose.jws.handlers;
018
019import org.forgerock.json.jose.jws.JwsAlgorithm;
020import org.forgerock.json.jose.utils.Utils;
021
022/**
023 * An implementation of the SigningHandler which does not perform any signing or verifying.
024 *
025 * @since 2.0.0
026 */
027public class NOPSigningHandler implements SigningHandler {
028
029    /**
030     * Simply returns a byte array of a UTF-8 empty string.
031     *
032     * @param algorithm {@inheritDoc}
033     * @param data {@inheritDoc}
034     * @return {@inheritDoc}
035     */
036    @Override
037    public byte[] sign(JwsAlgorithm algorithm, String data) {
038        return "".getBytes(Utils.CHARSET);
039    }
040
041    /**
042     * Returns an empty byte array.
043     *
044     * @param algorithm {@inheritDoc}
045     * @param data {@inheritDoc}
046     * @return {@inheritDoc}
047     */
048    @Override
049    public byte[] sign(final JwsAlgorithm algorithm, final byte[] data) {
050        return new byte[0];
051    }
052
053    /**
054     * Verifies that the signature length is zero.
055     *
056     * @param algorithm {@inheritDoc}
057     * @param data {@inheritDoc}
058     * @param signature {@inheritDoc}
059     * @return {@inheritDoc}
060     */
061    @Override
062    public boolean verify(JwsAlgorithm algorithm, byte[] data, byte[] signature) {
063        return signature.length == 0;
064    }
065}