forked from sakaiproject/sakai
-
Notifications
You must be signed in to change notification settings - Fork 0
Commit
This commit does not belong to any branch on this repository, and may belong to a fork outside of the repository.
SAK-10025 Support two-step authentication in Kerberos provider
git-svn-id: https://source.sakaiproject.org/svn/providers/trunk@68832 66ffb92e-73f9-0310-93c1-f5514f145a0a
- Loading branch information
1 parent
9e01424
commit 96552bc
Showing
11 changed files
with
541 additions
and
191 deletions.
There are no files selected for viewing
This file contains bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
Learn more about bidirectional Unicode characters
172 changes: 172 additions & 0 deletions
172
providers/kerberos/src/java/org/sakaiproject/component/kerberos/user/JassAuthenticate.java
This file contains bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
Learn more about bidirectional Unicode characters
| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,172 @@ | ||
| /********************************************************************************** | ||
| * $URL$ | ||
| * $Id$ | ||
| *********************************************************************************** | ||
| * | ||
| * Copyright (c) 2003, 2004, 2005, 2006, 2007, 2008, 2009 The Sakai Foundation | ||
| * | ||
| * Licensed under the Educational Community License, Version 2.0 (the "License"); | ||
| * you may not use this file except in compliance with the License. | ||
| * You may obtain a copy of the License at | ||
| * | ||
| * http://www.osedu.org/licenses/ECL-2.0 | ||
| * | ||
| * Unless required by applicable law or agreed to in writing, software | ||
| * distributed under the License is distributed on an "AS IS" BASIS, | ||
| * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. | ||
| * See the License for the specific language governing permissions and | ||
| * limitations under the License. | ||
| * | ||
| ***************************************************************/ | ||
| package org.sakaiproject.component.kerberos.user; | ||
|
|
||
| import java.security.PrivilegedAction; | ||
|
|
||
| import javax.security.auth.Subject; | ||
| import javax.security.auth.login.LoginContext; | ||
| import javax.security.auth.login.LoginException; | ||
|
|
||
| import org.apache.commons.logging.Log; | ||
| import org.apache.commons.logging.LogFactory; | ||
| import org.ietf.jgss.GSSContext; | ||
| import org.ietf.jgss.GSSCredential; | ||
| import org.ietf.jgss.GSSException; | ||
| import org.ietf.jgss.GSSManager; | ||
| import org.ietf.jgss.GSSName; | ||
| import org.ietf.jgss.Oid; | ||
|
|
||
| /** | ||
| * Attempts to authenticate a user and reports success or an error message | ||
| * | ||
| * @author Matthew Buckett | ||
| * | ||
| */ | ||
| public class JassAuthenticate { | ||
|
|
||
| private final static Log log = LogFactory.getLog(JassAuthenticate.class); | ||
|
|
||
| private GSSContext clientContext; | ||
| private GSSContext serverContext; | ||
|
|
||
| private byte[] acceptTokens = new byte[0]; | ||
| private byte[] initTokens = new byte[0]; | ||
|
|
||
| private String serverGSS; | ||
| private int exchangeLimit = 50; | ||
|
|
||
| private String servicePrincipal; | ||
| private String userPrincipal; | ||
|
|
||
| private boolean verifyServiceTicket = false; | ||
|
|
||
| /** | ||
| * Get ready for JAAS authentication, but don't verify a service ticket. | ||
| */ | ||
| public JassAuthenticate(String userPrincipal) { | ||
| this.userPrincipal = userPrincipal; | ||
| verifyServiceTicket = false; | ||
| } | ||
|
|
||
| /** | ||
| * Get ready for JAAS authentication but attempt todo service ticket verification. | ||
| */ | ||
| public JassAuthenticate(String serverGSS, String servicePrincipal, String userPrincipal) { | ||
| this.serverGSS = serverGSS; | ||
| this.servicePrincipal = servicePrincipal; | ||
| this.userPrincipal = userPrincipal; | ||
| verifyServiceTicket = true; | ||
| } | ||
|
|
||
| private class InitiatorAction implements PrivilegedAction<Void> { | ||
| public Void run() { | ||
| try { | ||
| initTokens = clientContext.initSecContext(acceptTokens, 0, acceptTokens.length); | ||
| } catch (GSSException e) { | ||
| throw new RuntimeException("Failed to initiate.", e); | ||
| } | ||
| return null; | ||
| } | ||
| } | ||
|
|
||
| private class AcceptorAction implements PrivilegedAction<Void> { | ||
| public Void run() { | ||
| try { | ||
| acceptTokens = serverContext.acceptSecContext(initTokens, 0, initTokens.length); | ||
| } catch (GSSException e) { | ||
| throw new RuntimeException("Failed to accept.", e); | ||
| } | ||
| return null; | ||
| } | ||
| } | ||
|
|
||
| public boolean attemptAuthentication(String username, String password) { | ||
| LoginContext userLoginContext = null; | ||
| LoginContext serverLoginContext = null; | ||
|
|
||
| try { | ||
| // This may well fail so run catch exceptions here. | ||
| try { | ||
| userLoginContext = new LoginContext(userPrincipal, new UsernamePasswordCallback(username, password)); | ||
| userLoginContext.login(); | ||
| } catch (LoginException le) { | ||
| if (log.isDebugEnabled()) { | ||
| log.debug("Failed to authenticate "+ username, le); | ||
| } | ||
| return false; | ||
| } | ||
| if(!verifyServiceTicket) { | ||
| log.debug("Authenticated ok and not attempting service ticket verification"); | ||
| return true; | ||
| } | ||
| // Shouldn't ever fail | ||
| serverLoginContext = new LoginContext(servicePrincipal, new NullCallbackHandler()); | ||
| serverLoginContext.login(); | ||
|
|
||
| GSSManager manager = GSSManager.getInstance(); | ||
| Oid kerberos = new Oid("1.2.840.113554.1.2.2"); | ||
|
|
||
| GSSName serverName = manager.createName( | ||
| serverGSS, GSSName.NT_HOSTBASED_SERVICE); | ||
|
|
||
| clientContext = manager.createContext( | ||
| serverName, kerberos, null, | ||
| GSSContext.DEFAULT_LIFETIME); | ||
|
|
||
| serverContext = manager.createContext((GSSCredential)null); | ||
|
|
||
| int exchanges = 0; | ||
| while (!clientContext.isEstablished() && !serverContext.isEstablished() && !(initTokens == null && acceptTokens == null)) { | ||
| Subject.doAs(userLoginContext.getSubject(), new InitiatorAction()); | ||
| Subject.doAs(serverLoginContext.getSubject(), new AcceptorAction()); | ||
| if (++exchanges > exchangeLimit) { | ||
| throw new RuntimeException("Too many tickets exchanged ("+ exchangeLimit+ ")."); | ||
| } | ||
| } | ||
| log.debug("Authenticated ok and verified service ticket"); | ||
| return true; | ||
| } catch (GSSException gsse) { | ||
| log.warn("Failed to verify ticket.", gsse); | ||
| } catch (LoginException le) { | ||
| log.warn("Failed to login with keytab.", le); | ||
| } finally { | ||
| try { | ||
| if (clientContext != null) | ||
| clientContext.dispose(); | ||
| if (serverContext != null) | ||
| serverContext.dispose(); | ||
|
|
||
| if (userLoginContext != null) | ||
| userLoginContext.logout(); | ||
| if (serverLoginContext!= null) | ||
| serverLoginContext.logout(); | ||
| } catch (Exception e) { | ||
| log.error("Failed to tidy up after attempting authentication.", e); | ||
| } | ||
| } | ||
| return false; | ||
| } | ||
|
|
||
| public boolean isVerifyServiceTicket() { | ||
| return verifyServiceTicket; | ||
| } | ||
| } |
Oops, something went wrong.