/* * Copyright (c) 2005, 2009, Oracle and/or its affiliates. All rights reserved. * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. * * This code is free software; you can redistribute it and/or modify it * under the terms of the GNU General Public License version 2 only, as * published by the Free Software Foundation.  Oracle designates this * particular file as subject to the "Classpath" exception as provided * by Oracle in the LICENSE file that accompanied this code. * * This code is distributed in the hope that it will be useful, but WITHOUT * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License * version 2 for more details (a copy is included in the LICENSE file that * accompanied this code). * * You should have received a copy of the GNU General Public License version * 2 along with this work; if not, write to the Free Software Foundation, * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. * * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA * or visit www.oracle.com if you need additional information or have any * questions. */ package sun.net.www.protocol.http.spnego; import com.sun.security.jgss.ExtendedGSSContext;import java.io.IOException; import org.ietf.jgss.GSSContext;import org.ietf.jgss.GSSException;import org.ietf.jgss.GSSName;import org.ietf.jgss.Oid; import sun.net.www.protocol.http.HttpCallerInfo;import sun.net.www.protocol.http.Negotiator;import sun.security.jgss.GSSManagerImpl;import sun.security.jgss.GSSUtil;import sun.security.jgss.HttpCaller; /** * This class encapsulates all JAAS and JGSS API calls in a separate class * outside NegotiateAuthentication.java so that J2SE build can go smoothly * without the presence of it. * * @author weijun.wang@sun.com * @since 1.6 */public class NegotiatorImpl extends Negotiator {     private static final boolean DEBUG =        java.security.AccessController.doPrivileged(              new sun.security.action.GetBooleanAction("sun.security.krb5.debug"));     private GSSContext context;    private byte[] oneToken;     /**     * Initialize the object, which includes:<ul>     * <li>Find out what GSS mechanism to use from the system property     * <code>http.negotiate.mechanism.oid</code>, defaults SPNEGO     * <li>Creating the GSSName for the target host, "HTTP/"+hostname     * <li>Creating GSSContext     * <li>A first call to initSecContext</ul>     */    private void init(HttpCallerInfo hci) throws GSSException {        final Oid oid;         if (hci.scheme.equalsIgnoreCase("Kerberos")) {            // we can only use Kerberos mech when the scheme is kerberos            oid = GSSUtil.GSS_KRB5_MECH_OID;        } else {            String pref = java.security.AccessController.doPrivileged(                    new java.security.PrivilegedAction<String>() {                        public String run() {                            return System.getProperty(                                "http.auth.preference",                                "spnego");                        }                    });            if (pref.equalsIgnoreCase("kerberos")) {                oid = GSSUtil.GSS_KRB5_MECH_OID;            } else {                // currently there is no 3rd mech we can use                oid = GSSUtil.GSS_SPNEGO_MECH_OID;            }        }         GSSManagerImpl manager = new GSSManagerImpl(                new HttpCaller(hci));         // RFC 4559 4.1 uses uppercase service name "HTTP".        // RFC 4120 6.2.1 demands the host be lowercase        String peerName = "HTTP@" + hci.host.toLowerCase();         GSSName serverName = manager.createName(peerName,                GSSName.NT_HOSTBASED_SERVICE);        context = manager.createContext(serverName,                                        oid,                                        null,                                        GSSContext.DEFAULT_LIFETIME);         // Always respect delegation policy in HTTP/SPNEGO.        if (context instanceof ExtendedGSSContext) {            ((ExtendedGSSContext)context).requestDelegPolicy(true);        }        oneToken = context.initSecContext(new byte[0], 0, 0);    }     /**     * Constructor     * @throws java.io.IOException If negotiator cannot be constructed     */    public NegotiatorImpl(HttpCallerInfo hci) throws IOException {        try {            init(hci);        } catch (GSSException e) {            if (DEBUG) {                System.out.println("Negotiate support not initiated, will " +                        "fallback to other scheme if allowed. Reason:");                e.printStackTrace();            }            IOException ioe = new IOException("Negotiate support not initiated");            ioe.initCause(e);            throw ioe;        }    }     /**     * Return the first token of GSS, in SPNEGO, it's called NegTokenInit     * @return the first token     */    @Override    public byte[] firstToken() {        return oneToken;    }     /**     * Return the rest tokens of GSS, in SPNEGO, it's called NegTokenTarg     * @param token the token received from server     * @return the next token     * @throws java.io.IOException if the token cannot be created successfully     */    @Override    public byte[] nextToken(byte[] token) throws IOException {        try {            return context.initSecContext(token, 0, token.length);        } catch (GSSException e) {            if (DEBUG) {                System.out.println("Negotiate support cannot continue. Reason:");                e.printStackTrace();            }            IOException ioe = new IOException("Negotiate support cannot continue");            ioe.initCause(e);            throw ioe;        }    }}