author | weijun |
Fri, 04 Jun 2010 19:28:53 +0800 | |
changeset 5774 | 4b9857e483c1 |
parent 5506 | 202f599c92aa |
child 7668 | d4a77089c587 |
child 7801 | 814c8359b104 |
permissions | -rw-r--r-- |
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/* |
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* Copyright (c) 2008, 2009, Oracle and/or its affiliates. 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. |
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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 Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA |
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* or visit www.oracle.com if you need additional information or have any |
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* questions. |
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*/ |
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import com.sun.security.auth.module.Krb5LoginModule; |
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import java.security.Key; |
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import java.security.PrivilegedActionException; |
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import java.security.PrivilegedExceptionAction; |
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import java.util.Arrays; |
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import java.util.HashMap; |
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import java.util.Map; |
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import javax.security.auth.Subject; |
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import javax.security.auth.kerberos.KerberosKey; |
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import javax.security.auth.kerberos.KerberosTicket; |
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import javax.security.auth.login.LoginContext; |
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import org.ietf.jgss.GSSContext; |
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import org.ietf.jgss.GSSCredential; |
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import org.ietf.jgss.GSSException; |
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import org.ietf.jgss.GSSManager; |
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import org.ietf.jgss.GSSName; |
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import org.ietf.jgss.MessageProp; |
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import org.ietf.jgss.Oid; |
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import com.sun.security.jgss.ExtendedGSSContext; |
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import com.sun.security.jgss.InquireType; |
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import com.sun.security.jgss.AuthorizationDataEntry; |
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import java.io.File; |
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/** |
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* Context of a JGSS subject, encapsulating Subject and GSSContext. |
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* |
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* Three "constructors", which acquire the (private) credentials and fill |
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* it into the Subject: |
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* |
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* 1. static fromJAAS(): Creates a Context using a JAAS login config entry |
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* 2. static fromUserPass(): Creates a Context using a username and a password |
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* 3. delegated(): A new context which uses the delegated credentials from a |
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* previously established acceptor Context |
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* |
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* Two context initiators, which create the GSSContext object inside: |
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* |
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* 1. startAsClient() |
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* 2. startAsServer() |
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* |
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* Privileged action: |
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* doAs(): Performs an action in the name of the Subject |
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* |
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* Handshake process: |
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* static handShake(initiator, acceptor) |
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* |
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* A four-phase typical data communication which includes all four GSS |
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* actions (wrap, unwrap, getMic and veryfyMiC): |
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* static transmit(message, from, to) |
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*/ |
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public class Context { |
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private Subject s; |
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private ExtendedGSSContext x; |
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private boolean f; // context established? |
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private String name; |
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private GSSCredential cred; // see static method delegated(). |
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private Context() {} |
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/** |
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* Using the delegated credentials from a previous acceptor |
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* @param c |
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*/ |
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public Context delegated() throws Exception { |
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Context out = new Context(); |
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out.s = s; |
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out.cred = x.getDelegCred(); |
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out.name = name + " as " + out.cred.getName().toString(); |
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return out; |
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} |
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/** |
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* Logins with a JAAS login config entry name |
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*/ |
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public static Context fromJAAS(final String name) throws Exception { |
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Context out = new Context(); |
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out.name = name; |
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LoginContext lc = new LoginContext(name); |
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lc.login(); |
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out.s = lc.getSubject(); |
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return out; |
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} |
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/** |
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* Logins with a username and a password, using Krb5LoginModule directly |
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* @param storeKey true if key should be saved, used on acceptor side |
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*/ |
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public static Context fromUserPass(String user, char[] pass, boolean storeKey) |
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throws Exception { |
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Context out = new Context(); |
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out.name = user; |
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out.s = new Subject(); |
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Krb5LoginModule krb5 = new Krb5LoginModule(); |
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Map<String, String> map = new HashMap<String, String>(); |
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Map<String, Object> shared = new HashMap<String, Object>(); |
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if (pass != null) { |
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map.put("useFirstPass", "true"); |
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shared.put("javax.security.auth.login.name", user); |
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shared.put("javax.security.auth.login.password", pass); |
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} else { |
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map.put("doNotPrompt", "true"); |
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map.put("useTicketCache", "true"); |
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if (user != null) { |
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map.put("principal", user); |
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} |
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} |
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if (storeKey) { |
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map.put("storeKey", "true"); |
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} |
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krb5.initialize(out.s, null, shared, map); |
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krb5.login(); |
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krb5.commit(); |
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return out; |
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} |
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/** |
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* Logins with a username and a keytab, using Krb5LoginModule directly |
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* @param storeKey true if key should be saved, used on acceptor side |
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*/ |
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public static Context fromUserKtab(String user, String ktab, boolean storeKey) |
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throws Exception { |
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Context out = new Context(); |
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out.name = user; |
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out.s = new Subject(); |
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Krb5LoginModule krb5 = new Krb5LoginModule(); |
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Map<String, String> map = new HashMap<String, String>(); |
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map.put("doNotPrompt", "true"); |
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map.put("useTicketCache", "false"); |
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map.put("useKeyTab", "true"); |
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map.put("keyTab", ktab); |
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map.put("principal", user); |
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if (storeKey) { |
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map.put("storeKey", "true"); |
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} |
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krb5.initialize(out.s, null, null, map); |
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krb5.login(); |
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krb5.commit(); |
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return out; |
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} |
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/** |
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* Starts as a client |
170 |
* @param target communication peer |
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* @param mech GSS mech |
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* @throws java.lang.Exception |
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*/ |
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174 |
public void startAsClient(final String target, final Oid mech) throws Exception { |
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doAs(new Action() { |
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176 |
@Override |
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177 |
public byte[] run(Context me, byte[] dummy) throws Exception { |
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178 |
GSSManager m = GSSManager.getInstance(); |
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me.x = (ExtendedGSSContext)m.createContext( |
180 |
target.indexOf('@') < 0 ? |
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m.createName(target, null) : |
182 |
m.createName(target, GSSName.NT_HOSTBASED_SERVICE), |
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mech, |
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cred, |
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GSSContext.DEFAULT_LIFETIME); |
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return null; |
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187 |
} |
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}, null); |
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f = false; |
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} |
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||
192 |
/** |
|
193 |
* Starts as a server |
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194 |
* @param mech GSS mech |
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* @throws java.lang.Exception |
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196 |
*/ |
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197 |
public void startAsServer(final Oid mech) throws Exception { |
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doAs(new Action() { |
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199 |
@Override |
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200 |
public byte[] run(Context me, byte[] dummy) throws Exception { |
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GSSManager m = GSSManager.getInstance(); |
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me.x = (ExtendedGSSContext)m.createContext(m.createCredential( |
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null, |
204 |
GSSCredential.INDEFINITE_LIFETIME, |
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mech, |
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GSSCredential.ACCEPT_ONLY)); |
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return null; |
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208 |
} |
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}, null); |
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210 |
f = false; |
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211 |
} |
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212 |
||
213 |
/** |
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214 |
* Accesses the internal GSSContext object. Currently it's used for -- |
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* |
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216 |
* 1. calling requestXXX() before handshake |
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217 |
* 2. accessing source name |
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218 |
* |
|
219 |
* Note: If the application needs to do any privileged call on this |
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220 |
* object, please use doAs(). Otherwise, it can be done directly. The |
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* methods listed above are all non-privileged calls. |
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222 |
* |
|
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* @return the GSSContext object |
|
224 |
*/ |
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public ExtendedGSSContext x() { |
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return x; |
227 |
} |
|
228 |
||
229 |
/** |
|
230 |
* Disposes the GSSContext within |
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231 |
* @throws org.ietf.jgss.GSSException |
|
232 |
*/ |
|
233 |
public void dispose() throws GSSException { |
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234 |
x.dispose(); |
|
235 |
} |
|
236 |
||
237 |
/** |
|
238 |
* Does something using the Subject inside |
|
239 |
* @param action the action |
|
240 |
* @param in the input byte |
|
241 |
* @return the output byte |
|
242 |
* @throws java.lang.Exception |
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243 |
*/ |
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244 |
public byte[] doAs(final Action action, final byte[] in) throws Exception { |
|
245 |
try { |
|
246 |
return Subject.doAs(s, new PrivilegedExceptionAction<byte[]>() { |
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247 |
||
248 |
@Override |
|
249 |
public byte[] run() throws Exception { |
|
250 |
return action.run(Context.this, in); |
|
251 |
} |
|
252 |
}); |
|
253 |
} catch (PrivilegedActionException pae) { |
|
254 |
throw pae.getException(); |
|
255 |
} |
|
256 |
} |
|
257 |
||
258 |
/** |
|
259 |
* Prints status of GSSContext and Subject |
|
260 |
* @throws java.lang.Exception |
|
261 |
*/ |
|
262 |
public void status() throws Exception { |
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263 |
System.out.println("STATUS OF " + name.toUpperCase()); |
|
264 |
try { |
|
265 |
StringBuffer sb = new StringBuffer(); |
|
266 |
if (x.getAnonymityState()) { |
|
267 |
sb.append("anon, "); |
|
268 |
} |
|
269 |
if (x.getConfState()) { |
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270 |
sb.append("conf, "); |
|
271 |
} |
|
272 |
if (x.getCredDelegState()) { |
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273 |
sb.append("deleg, "); |
|
274 |
} |
|
275 |
if (x.getIntegState()) { |
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276 |
sb.append("integ, "); |
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277 |
} |
|
278 |
if (x.getMutualAuthState()) { |
|
279 |
sb.append("mutual, "); |
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280 |
} |
|
281 |
if (x.getReplayDetState()) { |
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282 |
sb.append("rep det, "); |
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283 |
} |
|
284 |
if (x.getSequenceDetState()) { |
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285 |
sb.append("seq det, "); |
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286 |
} |
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if (x instanceof ExtendedGSSContext) { |
288 |
if (((ExtendedGSSContext)x).getDelegPolicyState()) { |
|
289 |
sb.append("deleg policy, "); |
|
290 |
} |
|
291 |
} |
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System.out.println("Context status of " + name + ": " + sb.toString()); |
293 |
System.out.println(x.getSrcName() + " -> " + x.getTargName()); |
|
294 |
} catch (Exception e) { |
|
295 |
;// Don't care |
|
296 |
} |
|
297 |
System.out.println("====================================="); |
|
298 |
for (Object o : s.getPrivateCredentials()) { |
|
299 |
System.out.println(" " + o.getClass()); |
|
300 |
if (o instanceof KerberosTicket) { |
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301 |
KerberosTicket kt = (KerberosTicket) o; |
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302 |
System.out.println(" " + kt.getServer() + " for " + kt.getClient()); |
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303 |
} else if (o instanceof KerberosKey) { |
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304 |
KerberosKey kk = (KerberosKey) o; |
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305 |
System.out.print(" " + kk.getKeyType() + " " + kk.getVersionNumber() + " " + kk.getAlgorithm() + " "); |
|
306 |
for (byte b : kk.getEncoded()) { |
|
307 |
System.out.printf("%02X", b & 0xff); |
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308 |
} |
|
309 |
System.out.println(); |
|
310 |
} else if (o instanceof Map) { |
|
311 |
Map map = (Map) o; |
|
312 |
for (Object k : map.keySet()) { |
|
313 |
System.out.println(" " + k + ": " + map.get(k)); |
|
314 |
} |
|
315 |
} |
|
316 |
} |
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if (x != null && x instanceof ExtendedGSSContext) { |
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if (x.isEstablished()) { |
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ExtendedGSSContext ex = (ExtendedGSSContext)x; |
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Key k = (Key)ex.inquireSecContext( |
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InquireType.KRB5_GET_SESSION_KEY); |
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if (k == null) { |
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throw new Exception("Session key cannot be null"); |
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} |
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System.out.println("Session key is: " + k); |
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326 |
boolean[] flags = (boolean[])ex.inquireSecContext( |
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InquireType.KRB5_GET_TKT_FLAGS); |
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if (flags == null) { |
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throw new Exception("Ticket flags cannot be null"); |
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} |
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System.out.println("Ticket flags is: " + Arrays.toString(flags)); |
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332 |
String authTime = (String)ex.inquireSecContext( |
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InquireType.KRB5_GET_AUTHTIME); |
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|
334 |
if (authTime == null) { |
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throw new Exception("Auth time cannot be null"); |
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|
336 |
} |
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337 |
System.out.println("AuthTime is: " + authTime); |
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338 |
if (!x.isInitiator()) { |
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339 |
AuthorizationDataEntry[] ad = (AuthorizationDataEntry[])ex.inquireSecContext( |
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340 |
InquireType.KRB5_GET_AUTHZ_DATA); |
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341 |
System.out.println("AuthzData is: " + Arrays.toString(ad)); |
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342 |
} |
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} |
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344 |
} |
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} |
346 |
||
347 |
/** |
|
348 |
* Transmits a message from one Context to another. The sender wraps the |
|
349 |
* message and sends it to the receiver. The receiver unwraps it, creates |
|
350 |
* a MIC of the clear text and sends it back to the sender. The sender |
|
351 |
* verifies the MIC against the message sent earlier. |
|
352 |
* @param message the message |
|
353 |
* @param s1 the sender |
|
354 |
* @param s2 the receiver |
|
355 |
* @throws java.lang.Exception If anything goes wrong |
|
356 |
*/ |
|
357 |
static public void transmit(final String message, final Context s1, |
|
358 |
final Context s2) throws Exception { |
|
359 |
final byte[] messageBytes = message.getBytes(); |
|
360 |
System.out.printf("-------------------- TRANSMIT from %s to %s------------------------\n", |
|
361 |
s1.name, s2.name); |
|
362 |
||
363 |
byte[] t = s1.doAs(new Action() { |
|
364 |
@Override |
|
365 |
public byte[] run(Context me, byte[] dummy) throws Exception { |
|
366 |
System.out.println("wrap"); |
|
367 |
MessageProp p1 = new MessageProp(0, true); |
|
368 |
byte[] out = me.x.wrap(messageBytes, 0, messageBytes.length, p1); |
|
369 |
System.out.println(printProp(p1)); |
|
370 |
return out; |
|
371 |
} |
|
372 |
}, null); |
|
373 |
||
374 |
t = s2.doAs(new Action() { |
|
375 |
@Override |
|
376 |
public byte[] run(Context me, byte[] input) throws Exception { |
|
377 |
MessageProp p1 = new MessageProp(0, true); |
|
378 |
byte[] bytes = me.x.unwrap(input, 0, input.length, p1); |
|
379 |
if (!Arrays.equals(messageBytes, bytes)) |
|
380 |
throw new Exception("wrap/unwrap mismatch"); |
|
381 |
System.out.println("unwrap"); |
|
382 |
System.out.println(printProp(p1)); |
|
383 |
p1 = new MessageProp(0, true); |
|
384 |
System.out.println("getMIC"); |
|
385 |
bytes = me.x.getMIC(bytes, 0, bytes.length, p1); |
|
386 |
System.out.println(printProp(p1)); |
|
387 |
return bytes; |
|
388 |
} |
|
389 |
}, t); |
|
390 |
// Re-unwrap should make p2.isDuplicateToken() returns true |
|
391 |
s1.doAs(new Action() { |
|
392 |
@Override |
|
393 |
public byte[] run(Context me, byte[] input) throws Exception { |
|
394 |
MessageProp p1 = new MessageProp(0, true); |
|
395 |
System.out.println("verifyMIC"); |
|
396 |
me.x.verifyMIC(input, 0, input.length, |
|
397 |
messageBytes, 0, messageBytes.length, |
|
398 |
p1); |
|
399 |
System.out.println(printProp(p1)); |
|
400 |
return null; |
|
401 |
} |
|
402 |
}, t); |
|
403 |
} |
|
404 |
||
405 |
/** |
|
406 |
* Returns a string description of a MessageProp object |
|
407 |
* @param prop the object |
|
408 |
* @return the description |
|
409 |
*/ |
|
410 |
static public String printProp(MessageProp prop) { |
|
411 |
StringBuffer sb = new StringBuffer(); |
|
412 |
sb.append("MessagePop: "); |
|
413 |
sb.append("QOP="+ prop.getQOP() + ", "); |
|
414 |
sb.append(prop.getPrivacy()?"privacy, ":""); |
|
415 |
sb.append(prop.isDuplicateToken()?"dup, ":""); |
|
416 |
sb.append(prop.isGapToken()?"gap, ":""); |
|
417 |
sb.append(prop.isOldToken()?"old, ":""); |
|
418 |
sb.append(prop.isUnseqToken()?"unseq, ":""); |
|
419 |
sb.append(prop.getMinorString()+ "(" + prop.getMinorStatus()+")"); |
|
420 |
return sb.toString(); |
|
421 |
} |
|
422 |
||
423 |
/** |
|
424 |
* Handshake (security context establishment process) between two Contexts |
|
425 |
* @param c the initiator |
|
426 |
* @param s the acceptor |
|
427 |
* @throws java.lang.Exception |
|
428 |
*/ |
|
429 |
static public void handshake(final Context c, final Context s) throws Exception { |
|
430 |
byte[] t = new byte[0]; |
|
431 |
while (!c.f || !s.f) { |
|
432 |
t = c.doAs(new Action() { |
|
433 |
@Override |
|
434 |
public byte[] run(Context me, byte[] input) throws Exception { |
|
435 |
if (me.x.isEstablished()) { |
|
436 |
me.f = true; |
|
437 |
System.out.println(c.name + " side established"); |
|
1574 | 438 |
if (input != null) { |
439 |
throw new Exception("Context established but " + |
|
440 |
"still receive token at " + c.name); |
|
441 |
} |
|
1454 | 442 |
return null; |
443 |
} else { |
|
444 |
System.out.println(c.name + " call initSecContext"); |
|
445 |
return me.x.initSecContext(input, 0, input.length); |
|
446 |
} |
|
447 |
} |
|
448 |
}, t); |
|
449 |
||
450 |
t = s.doAs(new Action() { |
|
451 |
@Override |
|
452 |
public byte[] run(Context me, byte[] input) throws Exception { |
|
453 |
if (me.x.isEstablished()) { |
|
454 |
me.f = true; |
|
455 |
System.out.println(s.name + " side established"); |
|
1574 | 456 |
if (input != null) { |
457 |
throw new Exception("Context established but " + |
|
458 |
"still receive token at " + s.name); |
|
459 |
} |
|
1454 | 460 |
return null; |
461 |
} else { |
|
462 |
System.out.println(s.name + " called acceptSecContext"); |
|
463 |
return me.x.acceptSecContext(input, 0, input.length); |
|
464 |
} |
|
465 |
} |
|
466 |
}, t); |
|
467 |
} |
|
468 |
} |
|
469 |
} |