/*
* Copyright (c) 2005, 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
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package sun.net.www.protocol.http;
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.security.jgss.GSSManagerImpl;
import sun.security.jgss.GSSUtil;
/**
* This class encapsulates all JAAS and JGSS API calls in a seperate 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 <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>
* @param hostname name of peer server
* @param scheme auth scheme requested, Negotiate ot Kerberos
* @throws GSSException if any JGSS-API call fails
*/
private void init(final String hostname, String scheme) throws GSSException {
// "1.2.840.113554.1.2.2" Kerberos
// "1.3.6.1.5.5.2" SPNEGO
final Oid oid;
if (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(
GSSUtil.CALLER_HTTP_NEGOTIATE);
String peerName = "HTTP/" + hostname;
GSSName serverName = manager.createName(peerName, null);
context = manager.createContext(serverName,
oid,
null,
GSSContext.DEFAULT_LIFETIME);
// In order to support credential delegation in HTTP/SPNEGO,
// we always request it before initSecContext. The current
// implementation will check the OK-AS-DELEGATE flag inside
// the service ticket of the web server, and only enable
// delegation when this flag is set. This check is only
// performed when the GSS caller is CALLER_HTTP_NEGOTIATE,
// so all other normal GSS-API calls are not affected.
context.requestCredDeleg(true);
oneToken = context.initSecContext(new byte[0], 0, 0);
}
/**
* Constructor
* @param hostname name of peer server
* @param scheme auth scheme requested, Negotiate ot Kerberos
* @throws java.io.IOException If negotiator cannot be constructed
*/
public NegotiatorImpl(String hostname, String scheme) throws IOException {
try {
init(hostname, scheme);
} 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
*/
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
*/
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;
}
}
}