/*
 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS HEADER.
 *
 * Copyright 1997-2008 Sun Microsystems, Inc. All rights reserved.
 *
 * The contents of this file are subject to the terms of either the GNU
 * General Public License Version 2 only ("GPL") or the Common Development
 * and Distribution License("CDDL") (collectively, the "License").  You
 * may not use this file except in compliance with the License. You can obtain
 * a copy of the License at https://glassfish.dev.java.net/public/CDDL+GPL.html
 * or glassfish/bootstrap/legal/LICENSE.txt.  See the License for the specific
 * language governing permissions and limitations under the License.
 *
 * When distributing the software, include this License Header Notice in each
 * file and include the License file at glassfish/bootstrap/legal/LICENSE.txt.
 * Sun designates this particular file as subject to the "Classpath" exception
 * as provided by Sun in the GPL Version 2 section of the License file that
 * accompanied this code.  If applicable, add the following below the License
 * Header, with the fields enclosed by brackets [] replaced by your own
 * identifying information: "Portions Copyrighted [year]
 * [name of copyright owner]"
 *
 * Contributor(s):
 *
 * If you wish your version of this file to be governed by only the CDDL or
 * only the GPL Version 2, indicate your decision by adding "[Contributor]
 * elects to include this software in this distribution under the [CDDL or GPL
 * Version 2] license."  If you don't indicate a single choice of license, a
 * recipient has the option to distribute your version of this file under
 * either the CDDL, the GPL Version 2 or to extend the choice of license to
 * its licensees as provided above.  However, if you add GPL Version 2 code
 * and therefore, elected the GPL Version 2 license, then the option applies
 * only if the new code is made subject to such option by the copyright
 * holder.
 *
 *
 * This file incorporates work covered by the following copyright and
 * permission notice:
 *
 * Copyright 2004 The Apache Software Foundation
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *     http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */



package org.apache.tomcat.util.net;

import java.io.*;
import java.net.*;

/* SSLSupport

   Interface for SSL-specific functions

   @author EKR
*/

public interface SSLSupport {
    /**
     * The Request attribute key for the cipher suite.
     */
    public static final String CIPHER_SUITE_KEY = "javax.servlet.request.cipher_suite";

    /**
     * The Request attribute key for the key size.
     */
    public static final String KEY_SIZE_KEY = "javax.servlet.request.key_size";

    /**
     * The Request attribute key for the client certificate chain.
     */
    public static final String CERTIFICATE_KEY = "javax.servlet.request.X509Certificate";

    /**
     * The Request attribute key for the session id.
     * This one is a Tomcat extension to the Servlet spec.
     */
    public static final String SESSION_ID_KEY = "javax.servlet.request.ssl_session";

    /**
     * A mapping table to determine the number of effective bits in the key
     * when using a cipher suite containing the specified cipher name.  The
     * underlying data came from the TLS Specification (RFC 2246), Appendix C.
     */
     static final CipherData ciphers[] = {
        new CipherData("_WITH_NULL_", 0),
        new CipherData("_WITH_IDEA_CBC_", 128),
        new CipherData("_WITH_RC2_CBC_40_", 40),
        new CipherData("_WITH_RC4_40_", 40),
        new CipherData("_WITH_RC4_128_", 128),
        new CipherData("_WITH_DES40_CBC_", 40),
        new CipherData("_WITH_DES_CBC_", 56),
        new CipherData("_WITH_3DES_EDE_CBC_", 168)
    };

    /**
     * The cipher suite being used on this connection.
     */
    public String getCipherSuite() throws IOException;

    /**
     * The client certificate chain (if any).
     */
    public Object[] getPeerCertificateChain()
        throws IOException;

    /**
     * The client certificate chain (if any).
     * @param force If <code>true</code>, then re-negotiate the 
     *              connection if necessary.
     */
    public Object[] getPeerCertificateChain(boolean force)
        throws IOException;

    /**
     * Get the keysize.
     *
     * What we're supposed to put here is ill-defined by the
     * Servlet spec (S 4.7 again). There are at least 4 potential
     * values that might go here:
     *
     * (a) The size of the encryption key
     * (b) The size of the MAC key
     * (c) The size of the key-exchange key
     * (d) The size of the signature key used by the server
     *
     * Unfortunately, all of these values are nonsensical.
     **/
    public Integer getKeySize()
        throws IOException;

    /**
     * The current session Id.
     */
    public String getSessionId()
        throws IOException;
    /**
     * Simple data class that represents the cipher being used, along with the
     * corresponding effective key size.  The specified phrase must appear in the
     * name of the cipher suite to be recognized.
     */
    
    final class CipherData {
    
        public String phrase = null;
    
        public int keySize = 0;
    
        public CipherData(String phrase, int keySize) {
            this.phrase = phrase;
            this.keySize = keySize;
        }
    
    }
    
}

