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 if (logger.isLoggable(PlatformLogger.FINEST)) {
80 logger.finest("NegotiateAuthentication: " + e);
81 }
82 }
83 }
84
--- EOF ---