1 /* 2 * Copyright (c) 2009, 2011, 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 26 package sun.net.www.protocol.http; 27 28 import java.io.IOException; 29 import java.lang.reflect.Constructor; 30 import 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 */ 36 public 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", true, null); 52 c = clazz.getConstructor(HttpCallerInfo.class); 53 } catch (ClassNotFoundException cnfe) { 54 finest(cnfe); 55 return null; 56 } catch (ReflectiveOperationException roe) { 57 // if the class is there then something seriously wrong if 58 // the constructor is not. 59 throw new AssertionError(roe); 60 } 61 62 try { 63 return (Negotiator) (c.newInstance(hci)); 64 } catch (ReflectiveOperationException roe) { 65 finest(roe); 66 Throwable t = roe.getCause(); 67 if (t != null && t instanceof Exception) 68 finest((Exception)t); 69 return null; 70 } 71 } 72 73 public abstract byte[] firstToken() throws IOException; 74 75 public abstract byte[] nextToken(byte[] in) throws IOException; 76 77 private static void finest(Exception e) { 78 PlatformLogger logger = HttpURLConnection.getHttpLogger(); 79 logger.finest("NegotiateAuthentication: " + e); 80 } 81 } 82