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view src/org/eclipse/jetty/server/ssl/ServletSSL.java @ 895:49ff91097d6c
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author | Franklin Schmidt <fschmidt@gmail.com> |
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date | Thu, 06 Oct 2016 23:43:36 -0600 |
parents | 3428c60d7cfc |
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// // ======================================================================== // Copyright (c) 1995-2014 Mort Bay Consulting Pty. Ltd. // ------------------------------------------------------------------------ // All rights reserved. This program and the accompanying materials // are made available under the terms of the Eclipse Public License v1.0 // and Apache License v2.0 which accompanies this distribution. // // The Eclipse Public License is available at // http://www.eclipse.org/legal/epl-v10.html // // The Apache License v2.0 is available at // http://www.opensource.org/licenses/apache2.0.php // // You may elect to redistribute this code under either of these licenses. // ======================================================================== // package org.eclipse.jetty.server.ssl; /* --------------------------------------------------------------------- */ /** * Jetty Servlet SSL support utilities. * <p> * A collection of utilities required to support the SSL requirements of the Servlet 2.2 and 2.3 * specs. * * <p> * Used by the SSL listener classes. * * */ public class ServletSSL { /* ------------------------------------------------------------ */ /** * Given the name of a TLS/SSL cipher suite, return an int representing it effective stream * cipher key strength. i.e. How much entropy material is in the key material being fed into the * encryption routines. * * <p> * This is based on the information on effective key lengths in RFC 2246 - The TLS Protocol * Version 1.0, Appendix C. CipherSuite definitions: * * <pre> * Effective * Cipher Type Key Bits * * NULL * Stream 0 * IDEA_CBC Block 128 * RC2_CBC_40 * Block 40 * RC4_40 * Stream 40 * RC4_128 Stream 128 * DES40_CBC * Block 40 * DES_CBC Block 56 * 3DES_EDE_CBC Block 168 * </pre> * * @param cipherSuite String name of the TLS cipher suite. * @return int indicating the effective key entropy bit-length. */ public static int deduceKeyLength(String cipherSuite) { // Roughly ordered from most common to least common. if (cipherSuite == null) return 0; else if (cipherSuite.indexOf("WITH_AES_256_") >= 0) return 256; else if (cipherSuite.indexOf("WITH_RC4_128_") >= 0) return 128; else if (cipherSuite.indexOf("WITH_AES_128_") >= 0) return 128; else if (cipherSuite.indexOf("WITH_RC4_40_") >= 0) return 40; else if (cipherSuite.indexOf("WITH_3DES_EDE_CBC_") >= 0) return 168; else if (cipherSuite.indexOf("WITH_IDEA_CBC_") >= 0) return 128; else if (cipherSuite.indexOf("WITH_RC2_CBC_40_") >= 0) return 40; else if (cipherSuite.indexOf("WITH_DES40_CBC_") >= 0) return 40; else if (cipherSuite.indexOf("WITH_DES_CBC_") >= 0) return 56; else return 0; } }