/*
* JBoss, Home of Professional Open Source
* Copyright 2005, JBoss Inc., and individual contributors as indicated
* by the @authors tag. See the copyright.txt in the distribution for a
* full listing of individual contributors.
*
* This is free software; you can redistribute it and/or modify it
* under the terms of the GNU Lesser General Public License as
* published by the Free Software Foundation; either version 2.1 of
* the License, or (at your option) any later version.
*
* This software 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
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with this software; if not, write to the Free
* Software Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA
* 02110-1301 USA, or see the FSF site: http://www.fsf.org.
*/
package org.jboss.security;
import java.io.IOException;
import java.security.Principal;
import java.util.Map;
import java.util.Set;
import javax.security.auth.Subject;
import javax.security.auth.callback.Callback;
import javax.security.auth.callback.CallbackHandler;
import javax.security.auth.callback.NameCallback;
import javax.security.auth.callback.PasswordCallback;
import javax.security.auth.callback.UnsupportedCallbackException;
import javax.security.auth.login.LoginException;
import javax.security.auth.spi.LoginModule;
import org.jboss.logging.Logger;
/** A simple implementation of LoginModule for use by JBoss clients for
the establishment of the caller identity and credentials. This simply sets
the SecurityAssociation principal to the value of the NameCallback
filled in by the CallbackHandler, and the SecurityAssociation credential
to the value of the PasswordCallback filled in by the CallbackHandler.
It has the following options:
<ul>
<li>multi-threaded=[true|false]
When the multi-threaded option is set to true, the SecurityAssociation.setServer()
so that each login thread has its own principal and credential storage.
<li>restore-login-identity=[true|false]
When restore-login-identity is true, the SecurityAssociation principal
and credential seen on entry to the login() method are saved and restored
on either abort or logout. When false (the default), the abort and logout
simply clears the SecurityAssociation. A restore-login-identity of true is
needed if one need to change identities and then restore the original
caller identity.
<li>password-stacking=tryFirstPass|useFirstPass
When password-stacking option is set, this module first looks for a shared
username and password using "javax.security.auth.login.name" and
"javax.security.auth.login.password" respectively. This allows a module configured
prior to this one to establish a valid username and password that should be passed
to JBoss.
</ul>
@author <a href="mailto:on@ibis.odessa.ua">Oleg Nitz</a>
@author Scott.Stark@jboss.org
@author Anil.Saldhana@redhat.com
*/
public class ClientLoginModule implements LoginModule
{
private static Logger log = Logger.getLogger(ClientLoginModule.class);
private Subject subject;
private CallbackHandler callbackHandler;
/** The principal set during login() */
private Principal loginPrincipal;
/** The credential set during login() */
private Object loginCredential;
/** Shared state between login modules */
private Map<String,?> sharedState;
/** Flag indicating if the shared password should be used */
private boolean useFirstPass;
/** Flag indicating if the SecurityAssociation existing at login should
be restored on logout.
*/
private boolean restoreLoginIdentity;
private boolean trace;
/** To restore prelogin identity **/
private SecurityContext cachedSecurityContext;
/** Initialize this LoginModule. This checks for the options:
multi-threaded
restore-login-identity
password-stacking
*/
public void initialize(Subject subject, CallbackHandler callbackHandler,
Map<String,?> sharedState, Map<String,?> options)
{
this.trace = log.isTraceEnabled();
this.subject = subject;
this.callbackHandler = callbackHandler;
this.sharedState = sharedState;
//log securityDomain, if set.
if(trace)
log.trace("Security domain: " +
(String)options.get(SecurityConstants.SECURITY_DOMAIN_OPTION));
// Check for multi-threaded option
String flag = (String) options.get("multi-threaded");
if (Boolean.valueOf(flag).booleanValue() == true)
{
/* Turn on the server mode which uses thread local storage for
the principal information.
*/
if(trace)
log.trace("Enabling multi-threaded mode");
SecurityAssociationActions.setServer();
}
/**
* SECURITY-415: when the multi-threaded value is explictly set
* at false, then get into the client mode.
*/
if(flag != null && flag.length() > 0 && "false".equalsIgnoreCase(flag))
{
SecurityAssociationActions.setClient();
}
flag = (String) options.get("restore-login-identity");
restoreLoginIdentity = Boolean.valueOf(flag).booleanValue();
if(trace)
log.trace("Enabling restore-login-identity mode");
/* Check for password sharing options. Any non-null value for
password_stacking sets useFirstPass as this module has no way to
validate any shared password.
*/
String passwordStacking = (String) options.get("password-stacking");
useFirstPass = passwordStacking != null;
if(trace && useFirstPass)
log.trace("Enabling useFirstPass mode");
//Cache the existing security context
this.cachedSecurityContext = SecurityAssociationActions.getSecurityContext();
}
/**
* Method to authenticate a Subject (phase 1).
*/
public boolean login() throws LoginException
{
if( trace )
log.trace("Begin login");
// If useFirstPass is true, look for the shared password
if (useFirstPass == true)
{
try
{
Object name = sharedState.get("javax.security.auth.login.name");
if ((name instanceof Principal) == false)
{
String username = name != null ? name.toString() : "";
loginPrincipal = new SimplePrincipal(username);
} else
{
loginPrincipal = (Principal) name;
}
loginCredential = sharedState.get("javax.security.auth.login.password");
return true;
}
catch (Exception e)
{ // Dump the exception and continue
log.debug("Failed to obtain shared state", e);
}
}
/* There is no password sharing or we are the first login module. Get
the username and password from the callback hander.
*/
if (callbackHandler == null)
throw new LoginException("Error: no CallbackHandler available " +
"to garner authentication information from the user");
PasswordCallback pc = new PasswordCallback("Password: ", false);
NameCallback nc = new NameCallback("User name: ", "guest");
Callback[] callbacks = {nc, pc};
try
{
String username;
char[] password = null;
char[] tmpPassword;
callbackHandler.handle(callbacks);
username = nc.getName();
loginPrincipal = new SimplePrincipal(username);
tmpPassword = pc.getPassword();
if (tmpPassword != null)
{
password = new char[tmpPassword.length];
System.arraycopy(tmpPassword, 0, password, 0, tmpPassword.length);
pc.clearPassword();
}
loginCredential = password;
if( trace )
{
String credType = "null";
if( loginCredential != null )
credType = loginCredential.getClass().getName();
log.trace("Obtained login: "+loginPrincipal
+", credential.class: " + credType);
}
}
catch (IOException ioe)
{
LoginException ex = new LoginException(ioe.toString());
ex.initCause(ioe);
throw ex;
}
catch (UnsupportedCallbackException uce)
{
LoginException ex = new LoginException("Error: " + uce.getCallback().toString() +
", not able to use this callback for username/password");
ex.initCause(uce);
throw ex;
}
if( trace )
log.trace("End login");
return true;
}
/**
* Method to commit the authentication process (phase 2).
*/
public boolean commit() throws LoginException
{
if( trace )
log.trace("commit, subject="+subject);
SecurityAssociationActions.setPrincipalInfo(loginPrincipal, loginCredential, subject);
// Add the login principal to the subject if is not there
Set<Principal> principals = subject.getPrincipals();
if (principals.contains(loginPrincipal) == false)
principals.add(loginPrincipal);
return true;
}
/**
* Method to abort the authentication process (phase 2).
*/
public boolean abort() throws LoginException
{
if( trace )
log.trace("abort");
if( restoreLoginIdentity == true )
{
SecurityAssociationActions.popPrincipalInfo();
SecurityAssociationActions.setSecurityContext(this.cachedSecurityContext);
}
else
{
// Clear the entire security association stack
SecurityAssociationActions.clear();
SecurityAssociationActions.popPrincipalInfo(); //SECURITY-339
}
return true;
}
public boolean logout() throws LoginException
{
if( trace )
log.trace("logout");
if( restoreLoginIdentity == true )
{
SecurityAssociationActions.popPrincipalInfo();
SecurityAssociationActions.setSecurityContext(this.cachedSecurityContext);
}
else
{
// Clear the entire security association stack
SecurityAssociationActions.clear();
SecurityAssociationActions.clearSecurityContext(null);
}
Set<Principal> principals = subject.getPrincipals();
principals.remove(loginPrincipal);
return true;
}
}