/*
 * Copyright (c) 2005, 2007, Oracle and/or its affiliates. All rights reserved.
 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
 *
 * This code is free software; you can redistribute it and/or modify it
 * under the terms of the GNU General Public License version 2 only, as
 * published by the Free Software Foundation.  Oracle designates this
 * particular file as subject to the "Classpath" exception as provided
 * by Oracle in the LICENSE file that accompanied this code.
 *
 * This code is distributed in the hope that it will be useful, but WITHOUT
 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
 * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
 * version 2 for more details (a copy is included in the LICENSE file that
 * accompanied this code).
 *
 * You should have received a copy of the GNU General Public License version
 * 2 along with this work; if not, write to the Free Software Foundation,
 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
 *
 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
 * or visit www.oracle.com if you need additional information or have any
 * questions.
 */

package sun.security.internal.spec;

import java.security.spec.KeySpec;

import javax.crypto.SecretKey;
import javax.crypto.spec.IvParameterSpec;

/**
 * KeySpec class for SSL/TLS key material.
 *
 * <p>Instances of this class are returned by the <code>generateKey()</code>
 * method of KeyGenerators of the type "TlsKeyMaterial".
 * Instances of this class are immutable.
 *
 * @since   1.6
 * @author  Andreas Sterbenz
 * @deprecated Sun JDK internal use only --- WILL BE REMOVED in Dolphin (JDK 7)
 */
@Deprecated
public class TlsKeyMaterialSpec implements KeySpec, SecretKey {

    static final long serialVersionUID = 812912859129525028L;

    private final SecretKey clientMacKey, serverMacKey;
    private final SecretKey clientCipherKey, serverCipherKey;
    private final IvParameterSpec clientIv, serverIv;

    /**
     * Constructs a new TlsKeymaterialSpec from the client and server MAC
     * keys.
     * This call is equivalent to
     * <code>new TlsKeymaterialSpec(clientMacKey, serverMacKey,
     * null, null, null, null)</code>.
     *
     * @param clientMacKey the client MAC key
     * @param serverMacKey the server MAC key
     * @throws NullPointerException if clientMacKey or serverMacKey is null
     */
    public TlsKeyMaterialSpec(SecretKey clientMacKey, SecretKey serverMacKey) {
        this(clientMacKey, serverMacKey, null, null, null, null);
    }

    /**
     * Constructs a new TlsKeymaterialSpec from the client and server MAC
     * keys and client and server cipher keys.
     * This call is equivalent to
     * <code>new TlsKeymaterialSpec(clientMacKey, serverMacKey,
     * clientCipherKey, serverCipherKey, null, null)</code>.
     *
     * @param clientMacKey the client MAC key
     * @param serverMacKey the server MAC key
     * @param clientCipherKey the client cipher key (or null)
     * @param serverCipherKey the server cipher key (or null)
     * @throws NullPointerException if clientMacKey or serverMacKey is null
     */
    public TlsKeyMaterialSpec(SecretKey clientMacKey, SecretKey serverMacKey,
            SecretKey clientCipherKey, SecretKey serverCipherKey) {
        this(clientMacKey, serverMacKey, clientCipherKey, null, serverCipherKey, null);
    }

    /**
     * Constructs a new TlsKeymaterialSpec from the client and server MAC
     * keys, client and server cipher keys, and client and server
     * initialization vectors.
     *
     * @param clientMacKey the client MAC key
     * @param serverMacKey the server MAC key
     * @param clientCipherKey the client cipher key (or null)
     * @param clientIv the client initialization vector (or null)
     * @param serverCipherKey the server cipher key (or null)
     * @param serverIv the server initialization vector (or null)
     *
     * @throws NullPointerException if clientMacKey or serverMacKey is null
     */
    public TlsKeyMaterialSpec(SecretKey clientMacKey, SecretKey serverMacKey,
            SecretKey clientCipherKey, IvParameterSpec clientIv,
            SecretKey serverCipherKey, IvParameterSpec serverIv) {
        if ((clientMacKey == null) || (serverMacKey == null)) {
            throw new NullPointerException("MAC keys must not be null");
        }
        this.clientMacKey = clientMacKey;
        this.serverMacKey = serverMacKey;
        this.clientCipherKey = clientCipherKey;
        this.serverCipherKey = serverCipherKey;
        this.clientIv = clientIv;
        this.serverIv = serverIv;
    }

    /**
     * Returns <code>TlsKeyMaterial</code>.
     *
     * @return <code>TlsKeyMaterial</code>.
     */
    public String getAlgorithm() {
        return "TlsKeyMaterial";
    }

    /**
     * Returns <code>null</code> because keys of this type have no encoding.
     *
     * @return <code>null</code> because keys of this type have no encoding.
     */
    public String getFormat() {
        return null;
    }

    /**
     * Returns <code>null</code> because keys of this type have no encoding.
     *
     * @return <code>null</code> because keys of this type have no encoding.
     */
    public byte[] getEncoded() {
        return null;
    }

    /**
     * Returns the client MAC key.
     *
     * @return the client MAC key.
     */
    public SecretKey getClientMacKey() {
        return clientMacKey;
    }

    /**
     * Return the server MAC key.
     *
     * @return the server MAC key.
     */
    public SecretKey getServerMacKey() {
        return serverMacKey;
    }

    /**
     * Return the client cipher key (or null).
     *
     * @return the client cipher key (or null).
     */
    public SecretKey getClientCipherKey() {
        return clientCipherKey;
    }

    /**
     * Return the client initialization vector (or null).
     *
     * @return the client initialization vector (or null).
     */
    public IvParameterSpec getClientIv() {
        return clientIv;
    }

    /**
     * Return the server cipher key (or null).
     *
     * @return the server cipher key (or null).
     */
    public SecretKey getServerCipherKey() {
        return serverCipherKey;
    }

    /**
     * Return the server initialization vector (or null).
     *
     * @return the server initialization vector (or null).
     */
    public IvParameterSpec getServerIv() {
        return serverIv;
    }

}
