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package com.sun.enterprise.security.auth.login;
import java.util.*;
import javax.security.auth.*;
import javax.security.auth.callback.*;
import javax.security.auth.login.*;
import javax.security.auth.spi.*;
import com.sun.enterprise.security.auth.login.PasswordCredential;
import com.sun.enterprise.deployment.PrincipalImpl;
import com.sun.enterprise.util.LocalStringManagerImpl;
import java.util.logging.*;
import com.sun.logging.*;
import com.sun.enterprise.security.UsernamePasswordStore;
/**
* <p> This sample LoginModule authenticates users with a password.
*
* <p> If testUser successfully authenticates itself,
* a <code>PrincipalImpl</code> with the testUser's username
* is added to the Subject.
*
* @author Harpreet Singh (harpreet.singh@sun.com)
*/
public class ClientPasswordLoginModule implements LoginModule {
private static final Logger _logger=
LogDomains.getLogger(LogDomains.SECURITY_LOGGER);
private static final String DEFAULT_REALMNAME = "default";
private static final LocalStringManagerImpl localStrings =
new LocalStringManagerImpl(ClientPasswordLoginModule.class);
// initial state
private Subject subject;
private CallbackHandler callbackHandler;
private Map sharedState;
private Map options;
// the authentication status
private boolean succeeded = false;
private boolean commitSucceeded = false;
// username and password
private String username;
private char[] password;
// testUser's PrincipalImpl
private PrincipalImpl userPrincipal;
public static final String LOGIN_NAME = "j2eelogin.name";
public static final String LOGIN_PASSWORD = "j2eelogin.password";
/**
* Initialize this <code>LoginModule</code>.
*
* <p>
*
* @param subject the <code>Subject</code> to be authenticated. <p>
*
* @param callbackHandler a <code>CallbackHandler</code> for communicating
* with the end user (prompting for usernames and
* passwords, for example). <p>
*
* @param sharedState shared <code>LoginModule</code> state. <p>
*
* @param options options specified in the login
* <code>Configuration</code> for this particular
* <code>LoginModule</code>.
*/
public void initialize(Subject subject, CallbackHandler callbackHandler,
Map sharedState, Map options) {
this.subject = subject;
this.callbackHandler = callbackHandler;
this.sharedState = sharedState;
this.options = options;
}
/**
* Authenticate the user by prompting for a username and password.
*
* <p>
*
* @return true in all cases since this <code>LoginModule</code>
* should not be ignored.
*
* @exception FailedLoginException if the authentication fails. <p>
*
* @exception LoginException if this <code>LoginModule</code>
* is unable to perform the authentication.
*/
public boolean login() throws LoginException {
// prompt for a username and password
if (callbackHandler == null){
String failure = localStrings.getLocalString("login.nocallback","Error: no CallbackHandler available to garner authentication information from the user");
throw new LoginException(failure);
}
// Get the username from the exchange mechanism
String uname = UsernamePasswordStore.getUsername();
String pswd = UsernamePasswordStore.getPassword();
boolean doSet = false;
// bugfix# 6412539
if (uname == null) {
uname = System.getProperty(LOGIN_NAME);
doSet = true;
}
if (pswd == null) {
pswd = System.getProperty(LOGIN_PASSWORD);
doSet = true;
}
if (doSet) {
UsernamePasswordStore.set(uname, pswd);
}
if (uname != null && pswd != null) {
username = uname;
int length = pswd.length();
char[] dest = new char[length];
pswd.getChars(0, length, dest, 0 );
password = new char[length];
System.arraycopy (dest, 0, password, 0, dest.length);
} else{
Callback[] callbacks = new Callback[2];
callbacks[0] = new NameCallback(localStrings.getLocalString("login.username", "ClientPasswordModule username: "));
callbacks[1] = new PasswordCallback(localStrings.getLocalString("login.password", "ClientPasswordModule password: "), false);
try {
callbackHandler.handle(callbacks);
username = ((NameCallback)callbacks[0]).getName();
if(username == null){
String fail = localStrings.getLocalString("login.nousername", "No user specified");
throw new LoginException(fail);
}
char[] tmpPassword = ((PasswordCallback)callbacks[1]).getPassword();
if (tmpPassword == null) {
// treat a NULL password as an empty password
tmpPassword = new char[0];
}
password = new char[tmpPassword.length];
System.arraycopy(tmpPassword, 0,
password, 0, tmpPassword.length);
((PasswordCallback)callbacks[1]).clearPassword();
} catch (java.io.IOException ioe) {
throw new LoginException(ioe.toString());
} catch (UnsupportedCallbackException uce) {
String nocallback = localStrings.getLocalString("login.callback","Error: Callback not available to garner authentication information from user(CallbackName):" );
throw new LoginException(nocallback +
uce.getCallback().toString());
}
}
// by default - the client side login module will always say
// that the login successful. The actual login will take place
// on the server side.
_logger.log(Level.FINEST,"\t\t[ClientPasswordLoginModule] " +
"authentication succeeded");
succeeded = true;
return true;
}
/**
* <p> This method is called if the LoginContext's
* overall authentication succeeded
* (the relevant REQUIRED, REQUISITE, SUFFICIENT and OPTIONAL LoginModules
* succeeded).
*
* <p> If this LoginModule's own authentication attempt
* succeeded (checked by retrieving the private state saved by the
* <code>login</code> method), then this method associates a
* <code>PrincipalImpl</code>
* with the <code>Subject</code> located in the
* <code>LoginModule</code>. If this LoginModule's own
* authentication attempted failed, then this method removes
* any state that was originally saved.
*
* <p>
*
* @exception LoginException if the commit fails.
*
* @return true if this LoginModule's own login and commit
* attempts succeeded, or false otherwise.
*/
public boolean commit() throws LoginException {
if (succeeded == false) {
return false;
} else {
// add a Principal (authenticated identity)
// to the Subject
// assume the user we authenticated is the PrincipalImpl
userPrincipal = new PrincipalImpl(username);
if (!subject.getPrincipals().contains(userPrincipal)){
subject.getPrincipals().add(userPrincipal);
}
_logger.log(Level.FINE,"\t\t[ClientPasswordLoginModule] " +
"added PrincipalImpl to Subject");
String realm = DEFAULT_REALMNAME;
PasswordCredential pc =
new PasswordCredential(username, new String(password), realm);
if(!subject.getPrivateCredentials().contains(pc)) {
subject.getPrivateCredentials().add(pc);
}
// in any case, clean out state
username = null;
for (int i = 0; i < password.length; i++){
password[i] = ' ';
}
password = null;
commitSucceeded = true;
return true;
}
}
/**
* <p> This method is called if the LoginContext's
* overall authentication failed.
* (the relevant REQUIRED, REQUISITE, SUFFICIENT and OPTIONAL LoginModules
* did not succeed).
*
* <p> If this LoginModule's own authentication attempt
* succeeded (checked by retrieving the private state saved by the
* <code>login</code> and <code>commit</code> methods),
* then this method cleans up any state that was originally saved.
*
* <p>
*
* @exception LoginException if the abort fails.
*
* @return false if this LoginModule's own login and/or commit attempts
* failed, and true otherwise.
*/
public boolean abort() throws LoginException {
if (succeeded == false) {
return false;
} else if (succeeded == true && commitSucceeded == false) {
// login succeeded but overall authentication failed
succeeded = false;
username = null;
if (password != null) {
for (int i = 0; i < password.length; i++){
password[i] = ' ';
}
password = null;
}
userPrincipal = null;
} else {
// overall authentication succeeded and commit succeeded,
// but someone else's commit failed
logout();
}
return true;
}
/**
* Logout the user.
*
* <p> This method removes the <code>PrincipalImpl</code>
* that was added by the <code>commit</code> method.
*
* <p>
*
* @exception LoginException if the logout fails.
*
* @return true in all cases since this <code>LoginModule</code>
* should not be ignored.
*/
public boolean logout() throws LoginException {
subject.getPrincipals().remove(userPrincipal);
succeeded = false;
succeeded = commitSucceeded;
username = null;
if (password != null) {
for (int i = 0; i < password.length; i++){
password[i] = ' ';
}
password = null;
}
userPrincipal = null;
return true;
}
}
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