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package com.sun.appserv.security;
import java.util.*;
import java.util.logging.Logger;
import java.util.logging.Level;
import com.sun.logging.LogDomains;
import com.sun.enterprise.util.i18n.StringManager;
import javax.security.auth.*;
import javax.security.auth.callback.*;
import javax.security.auth.login.*;
import javax.security.auth.spi.*;
import com.sun.enterprise.deployment.PrincipalImpl;
import com.sun.enterprise.deployment.Group;
import com.sun.enterprise.security.auth.realm.Realm;
import com.sun.enterprise.security.auth.login.PasswordCredential;
import com.sun.web.security.PrincipalGroupFactory;
/**
* Abstract base class for password-based login modules.
*
* <P>Most login modules receive a username and password from the client
* (possibly through HTTP BASIC auth, or FORM, or other mechanism) and
* then make (or delegate) an authentication decision based on this data.
* This class provides common methods for such password-based login modules.
*
* <P>Subclasses need to implement the authenticateUser() method and later
* call commitUserAuthentication().
*
*/
public abstract class AppservPasswordLoginModule implements LoginModule
{
// The _subject, _sharedState and _options satisfy LoginModule and are
// shared across sub-classes
protected Subject _subject;
protected Map _sharedState;
protected Map _options;
protected String _username;
protected String _password;
protected Realm _currentRealm;
// the authentication status
protected boolean _succeeded = false;
protected boolean _commitSucceeded = false;
protected PrincipalImpl _userPrincipal;
protected String[] _groupsList = null;
protected Logger _logger =
LogDomains.getLogger(LogDomains.SECURITY_LOGGER);
protected final static StringManager sm =
StringManager.getManager("com.sun.enterprise.security.auth.login");
/**
* Initialize this login module.
*
* @param subject - the Subject to be authenticated.
* @param callbackHandler - a CallbackHandler for obtaining the subject
* username and password.
* @param sharedState - state shared with other configured LoginModules.
* @param options - options specified in the login Configuration for
* this particular LoginModule.
*
*/
final public void initialize(Subject subject, CallbackHandler callbackHandler,
Map sharedState, Map options)
{
_subject = subject;
_sharedState = sharedState;
_options = options;
if(_logger.isLoggable(Level.FINE)){
_logger.log(Level.FINE, "Login module initialized: "+
this.getClass().toString());
}
}
/**
* Perform login.
*
* <P>The callback handler is used to obtain authentication info
* for the subject and a login is attempted. This PasswordLoginModule
* expects to find a PasswordCredential in the private credentials
* of the Subject. If not present the login fails. The callback
* handler is ignored as it is not really relevant on the server side.
* Finally, the authenticateUser() method is invoked.
*
* @returns true if login succeeds, otherwise an exception is thrown.
* @throws LoginException Thrown if login failed, or on other problems.
*
*/
final public boolean login() throws LoginException
{
if (_subject==null) {
String msg = sm.getString("pwdlm.noinfo");
_logger.log(Level.SEVERE, msg);
throw new LoginException(msg);
}
PasswordCredential pwdCred = null;
try {
Iterator i = _subject.getPrivateCredentials().iterator();
while (i.hasNext() && pwdCred==null) {
Object privCred = i.next();
if (privCred instanceof PasswordCredential) {
pwdCred = (PasswordCredential)privCred;
}
}
} catch (Exception e) {
_logger.log(Level.WARNING, "passwordlm.nocreds", e.toString());
}
if (pwdCred==null) {
_logger.log(Level.SEVERE, "passwordlm.nopwdcred");
String msg = sm.getString("pwdlm.nocreds");
throw new LoginException(msg);
}
// Need to obtain the requested realm to get parameters.
String realm = null;
try {
realm = pwdCred.getRealm();
_currentRealm = Realm.getInstance(realm);
} catch (Exception e) {
String msg = sm.getString("pwdlm.norealm", realm);
_logger.log(Level.SEVERE, msg);
throw new LoginException(msg);
}
if (_currentRealm == null) {
String msg = sm.getString("pwdlm.norealmavail", realm);
_logger.log(Level.SEVERE, msg);
throw new LoginException(msg);
}
// Get username and password data from credential (ignore callback)
_username = pwdCred.getUser();
_password = pwdCred.getPassword();
// Delegate the actual authentication to subclass.
authenticateUser();
if(_logger.isLoggable(Level.FINE)){
_logger.log(Level.FINE, "JAAS login complete.");
}
return true;
}
/**
* Commit the authentication.
*
* <P>Commit is called after all necessary login modules have succeeded.
* It adds (if not present) a PrincipalImpl principal and a
* LocalCredentials public credential to the Subject.
*
* @throws LoginException If commit fails.
*
*/
public boolean commit() throws LoginException
{
if (_succeeded == false) {
return false;
}
// Add a Principal (authenticated identity) to the Subject
// Assume the user we authenticated is the PrincipalImpl [RI]
String realm_name = _currentRealm.getName();
_userPrincipal =
PrincipalGroupFactory.getPrincipalInstance(_username, realm_name);
Set principalSet = _subject.getPrincipals();
if (!principalSet.contains(_userPrincipal)){
principalSet.add(_userPrincipal);
}
/* populate the group in the subject and clean out the slate at the same
* time
*/
for(int i = 0; i<_groupsList.length; i++){
if(_groupsList[i] != null){
Group g =
PrincipalGroupFactory.getGroupInstance(_groupsList[i], realm_name);
if(!principalSet.contains(g)){
principalSet.add(g);
}
// cleaning the slate
_groupsList[i] = null;
}
}
// In any case, clean out state.
_groupsList = null;
_username = null;
_password = null;
_commitSucceeded = true;
if(_logger.isLoggable(Level.FINE)){
_logger.log(Level.FINE,"JAAS authentication committed.");
}
return true;
}
/**
* Abort the authentication process.
*
*/
final public boolean abort() throws LoginException
{
if(_logger.isLoggable(Level.FINE)){
_logger.log(Level.FINE,"JAAS authentication aborted.");
}
if (_succeeded == false) {
return false;
} else if (_succeeded == true && _commitSucceeded == false) {
// login succeeded but overall authentication failed
_succeeded = false;
_username = null;
_password = null;
_userPrincipal = null;
for(int i = 0; i < _groupsList.length; i++){
_groupsList[i] = null;
}
_groupsList = null;
} else {
// overall authentication succeeded and commit succeeded,
// but someone else's commit failed
logout();
}
return true;
}
/**
* Log out the subject.
*
*/
final public boolean logout() throws LoginException
{
if(_logger.isLoggable(Level.FINE)){
_logger.log(Level.FINE, "JAAS logout for: " + _subject.toString());
}
_subject.getPrincipals().clear();
_subject.getPublicCredentials().clear();
_subject.getPrivateCredentials().clear();
_succeeded = false;
_commitSucceeded = false;
_username = null;
_password = null;
_userPrincipal = null;
if(_groupsList != null){
for (int i = 0; i < _groupsList.length; i++){
_groupsList[i] = null;
}
_groupsList = null;
}
return true;
}
/**
*
* <P>This is a convenience method which can be used by subclasses
*
* <P>Note that this method is called after the authentication
* has succeeded. If authentication failed do not call this method.
*
* Global instance field succeeded is set to true by this method.
*
* @param groups String array of group memberships for user (could be
* empty).
*/
public final void commitUserAuthentication (final String[] groups)
{
_groupsList = groups;
_succeeded = true;
}
/**
* @return the subject being authenticated.
* use case:
* A custom login module could overwrite commit() method, and call getSubject()
* to get subject being authenticated inside its commit(). Custom principal
* then can be added to subject. By doing this,custom principal will be stored
* in calling thread's security context and participate in following Appserver's
* authorization.
*
*/
public Subject getSubject()
{
return _subject;
}
/**
* Perform authentication decision.
*
* Method returns silently on success and returns a LoginException
* on failure.
* @throws LoginException on authentication failure.
*
*/
abstract protected void authenticateUser() throws LoginException;
}
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