1/* 2 * Copyright (c) 2009, 2013, Oracle and/or its affiliates. All rights reserved. 3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. 4 * 5 * This code is free software; you can redistribute it and/or modify it 6 * under the terms of the GNU General Public License version 2 only, as 7 * published by the Free Software Foundation. Oracle designates this 8 * particular file as subject to the "Classpath" exception as provided 9 * by Oracle in the LICENSE file that accompanied this code. 10 * 11 * This code is distributed in the hope that it will be useful, but WITHOUT 12 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or 13 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License 14 * version 2 for more details (a copy is included in the LICENSE file that 15 * accompanied this code). 16 * 17 * You should have received a copy of the GNU General Public License version 18 * 2 along with this work; if not, write to the Free Software Foundation, 19 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. 20 * 21 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA 22 * or visit www.oracle.com if you need additional information or have any 23 * questions. 24 */ 25 26package sun.net.www.protocol.http; 27 28import java.io.IOException; 29import java.lang.reflect.Constructor; 30import sun.util.logging.PlatformLogger; 31 32/** 33 * This abstract class is a bridge to connect NegotiteAuthentication and 34 * NegotiatorImpl, so that JAAS and JGSS calls can be made 35 */ 36public abstract class Negotiator { 37 static Negotiator getNegotiator(HttpCallerInfo hci) { 38 39 // These lines are equivalent to 40 // return new NegotiatorImpl(hci); 41 // The current implementation will make sure NegotiatorImpl is not 42 // directly referenced when compiling, thus smooth the way of building 43 // the J2SE platform where HttpURLConnection is a bootstrap class. 44 // 45 // Makes NegotiatorImpl, and the security classes it references, a 46 // runtime dependency rather than a static one. 47 48 Class<?> clazz; 49 Constructor<?> c; 50 try { 51 clazz = Class.forName("sun.net.www.protocol.http.spnego.NegotiatorImpl", 52 true, 53 ClassLoader.getPlatformClassLoader()); 54 c = clazz.getConstructor(HttpCallerInfo.class); 55 } catch (ClassNotFoundException cnfe) { 56 finest(cnfe); 57 return null; 58 } catch (ReflectiveOperationException roe) { 59 // if the class is there then something seriously wrong if 60 // the constructor is not. 61 throw new AssertionError(roe); 62 } 63 64 try { 65 return (Negotiator) (c.newInstance(hci)); 66 } catch (ReflectiveOperationException roe) { 67 finest(roe); 68 Throwable t = roe.getCause(); 69 if (t != null && t instanceof Exception) 70 finest((Exception)t); 71 return null; 72 } 73 } 74 75 public abstract byte[] firstToken() throws IOException; 76 77 public abstract byte[] nextToken(byte[] in) throws IOException; 78 79 private static void finest(Exception e) { 80 PlatformLogger logger = HttpURLConnection.getHttpLogger(); 81 if (logger.isLoggable(PlatformLogger.Level.FINEST)) { 82 logger.finest("NegotiateAuthentication: " + e); 83 } 84 } 85} 86 87