author | weijun |
Tue, 09 Jun 2009 14:17:05 +0800 | |
changeset 2942 | 37d9baeb7518 |
parent 715 | f16baef3a20e |
permissions | -rw-r--r-- |
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/* |
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* Copyright 2005-2009 Sun Microsystems, Inc. All Rights Reserved. |
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* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. |
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* |
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* This code is free software; you can redistribute it and/or modify it |
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* under the terms of the GNU General Public License version 2 only, as |
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* published by the Free Software Foundation. Sun designates this |
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* particular file as subject to the "Classpath" exception as provided |
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* by Sun in the LICENSE file that accompanied this code. |
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* |
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* This code is distributed in the hope that it will be useful, but WITHOUT |
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* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or |
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* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License |
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* version 2 for more details (a copy is included in the LICENSE file that |
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* accompanied this code). |
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* |
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* You should have received a copy of the GNU General Public License version |
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* 2 along with this work; if not, write to the Free Software Foundation, |
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* Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. |
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* |
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* Please contact Sun Microsystems, Inc., 4150 Network Circle, Santa Clara, |
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* CA 95054 USA or visit www.sun.com if you need additional information or |
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* have any questions. |
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*/ |
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package sun.net.www.protocol.http; |
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import java.io.IOException; |
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import org.ietf.jgss.GSSContext; |
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import org.ietf.jgss.GSSException; |
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import org.ietf.jgss.GSSName; |
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import org.ietf.jgss.Oid; |
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import sun.security.jgss.GSSManagerImpl; |
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import sun.security.jgss.GSSUtil; |
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import sun.security.jgss.HttpCaller; |
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/** |
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* This class encapsulates all JAAS and JGSS API calls in a separate class |
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* outside NegotiateAuthentication.java so that J2SE build can go smoothly |
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* without the presence of it. |
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* |
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* @author weijun.wang@sun.com |
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* @since 1.6 |
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*/ |
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public class NegotiatorImpl extends Negotiator { |
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private static final boolean DEBUG = |
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java.security.AccessController.doPrivileged( |
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new sun.security.action.GetBooleanAction("sun.security.krb5.debug")); |
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private GSSContext context; |
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private byte[] oneToken; |
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/** |
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* Initialize the object, which includes:<ul> |
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* <li>Find out what GSS mechanism to use from the system property |
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* <code>http.negotiate.mechanism.oid</code>, defaults SPNEGO |
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* <li>Creating the GSSName for the target host, "HTTP/"+hostname |
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* <li>Creating GSSContext |
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* <li>A first call to initSecContext</ul> |
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*/ |
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private void init(HttpCallerInfo hci) throws GSSException { |
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final Oid oid; |
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if (hci.scheme.equalsIgnoreCase("Kerberos")) { |
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// we can only use Kerberos mech when the scheme is kerberos |
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oid = GSSUtil.GSS_KRB5_MECH_OID; |
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} else { |
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String pref = java.security.AccessController.doPrivileged( |
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new java.security.PrivilegedAction<String>() { |
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public String run() { |
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return System.getProperty( |
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"http.auth.preference", |
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"spnego"); |
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} |
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}); |
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if (pref.equalsIgnoreCase("kerberos")) { |
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oid = GSSUtil.GSS_KRB5_MECH_OID; |
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} else { |
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// currently there is no 3rd mech we can use |
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oid = GSSUtil.GSS_SPNEGO_MECH_OID; |
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} |
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} |
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GSSManagerImpl manager = new GSSManagerImpl( |
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new HttpCaller(hci)); |
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// RFC 4559 4.1 uses uppercase service name "HTTP". |
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// RFC 4120 6.2.1 demands the host be lowercase |
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String peerName = "HTTP@" + hci.host.toLowerCase(); |
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GSSName serverName = manager.createName(peerName, |
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GSSName.NT_HOSTBASED_SERVICE); |
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context = manager.createContext(serverName, |
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oid, |
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null, |
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GSSContext.DEFAULT_LIFETIME); |
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// In order to support credential delegation in HTTP/SPNEGO, |
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// we always request it before initSecContext. The current |
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// implementation will check the OK-AS-DELEGATE flag inside |
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// the service ticket of the web server, and only enable |
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// delegation when this flag is set. This check is only |
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// performed when the GSS caller is CALLER_HTTP_NEGOTIATE, |
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// so all other normal GSS-API calls are not affected. |
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context.requestCredDeleg(true); |
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oneToken = context.initSecContext(new byte[0], 0, 0); |
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} |
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/** |
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* Constructor |
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* @throws java.io.IOException If negotiator cannot be constructed |
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*/ |
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public NegotiatorImpl(HttpCallerInfo hci) throws IOException { |
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try { |
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init(hci); |
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} catch (GSSException e) { |
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if (DEBUG) { |
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System.out.println("Negotiate support not initiated, will " + |
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"fallback to other scheme if allowed. Reason:"); |
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e.printStackTrace(); |
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} |
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IOException ioe = new IOException("Negotiate support not initiated"); |
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ioe.initCause(e); |
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throw ioe; |
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} |
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} |
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/** |
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* Return the first token of GSS, in SPNEGO, it's called NegTokenInit |
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* @return the first token |
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*/ |
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public byte[] firstToken() { |
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return oneToken; |
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} |
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/** |
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* Return the rest tokens of GSS, in SPNEGO, it's called NegTokenTarg |
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* @param token the token received from server |
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* @return the next token |
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* @throws java.io.IOException if the token cannot be created successfully |
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*/ |
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public byte[] nextToken(byte[] token) throws IOException { |
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try { |
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return context.initSecContext(token, 0, token.length); |
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} catch (GSSException e) { |
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if (DEBUG) { |
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System.out.println("Negotiate support cannot continue. Reason:"); |
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e.printStackTrace(); |
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} |
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IOException ioe = new IOException("Negotiate support cannot continue"); |
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ioe.initCause(e); |
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throw ioe; |
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} |
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} |
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} |