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  /*
   * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS HEADER.
   *
   * Copyright (c) 1997-2011 Oracle and/or its affiliates. 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_1_1.html
  * or packager/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 packager/legal/LICENSE.txt.
  *
  * GPL Classpath Exception:
  * Oracle designates this particular file as subject to the "Classpath"
  * exception as provided by Oracle in the GPL Version 2 section of the License
  * file that accompanied this code.
  *
  * Modifications:
  * If applicable, add the following below the License Header, with the fields
  * enclosed by brackets [] replaced by your own identifying information:
  * "Portions Copyright [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_id";

    
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).

Parameters:
force If true, 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 phraseint keySize) {
            this. = phrase;
            this. = keySize;
        }
    
    }
    
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