A supplied username and password is verified against the * corresponding user credentials stored in a designated password file. * If successful then a new {@link JMXPrincipal} is created with the * user's name and it is associated with the current {@link Subject}. * Such principals may be identified and granted management privileges in * the access control file for JMX remote management or in a Java security * policy. * *
The password file comprises a list of key-value pairs as specified in * {@link Properties}. The key represents a user's name and the value is its * associated cleartext password. By default, the following password file is * used: *
* ${java.home}/conf/management/jmxremote.password
*
* A different password file can be specified via the passwordFile
* configuration option.
*
* This module recognizes the following Configuration options:
*
passwordFile useFirstPass true, this module retrieves the username and password
* from the module's shared state, using "javax.security.auth.login.name"
* and "javax.security.auth.login.password" as the respective keys. The
* retrieved values are used for authentication. If authentication fails,
* no attempt for a retry is made, and the failure is reported back to
* the calling application.tryFirstPass true, this module retrieves the username and password
* from the module's shared state, using "javax.security.auth.login.name"
* and "javax.security.auth.login.password" as the respective keys. The
* retrieved values are used for authentication. If authentication fails,
* the module uses the CallbackHandler to retrieve a new username and
* password, and another attempt to authenticate is made. If the
* authentication fails, the failure is reported back to the calling
* application.storePass true, this module stores the username and password
* obtained from the CallbackHandler in the module's shared state, using
* "javax.security.auth.login.name" and
* "javax.security.auth.login.password" as the respective keys. This is
* not performed if existing values already exist for the username and
* password in the shared state, or if authentication fails.clearPass true, this module clears the username and password
* stored in the module's shared state after both phases of authentication
* (login and commit) have completed.LoginModule.
*
* @param subject the Subject to be authenticated.
* @param callbackHandler a CallbackHandler to acquire the
* user's name and password.
* @param sharedState shared LoginModule state.
* @param options options specified in the login
* Configuration for this particular
* LoginModule.
*/
public void initialize(Subject subject, CallbackHandler callbackHandler,
Map Acquire the user's name and password and verify them against
* the corresponding credentials from the password file.
*
* @return true always, since this LoginModule
* should not be ignored.
* @exception FailedLoginException if the authentication fails.
* @exception LoginException if this LoginModule
* is unable to perform the authentication.
*/
public boolean login() throws LoginException {
try {
loadPasswordFile();
} catch (IOException ioe) {
LoginException le = new LoginException(
"Error: unable to load the password file: " +
passwordFileDisplayName);
throw EnvHelp.initCause(le, ioe);
}
if (userCredentials == null) {
throw new LoginException
("Error: unable to locate the users' credentials.");
}
if (logger.debugOn()) {
logger.debug("login",
"Using password file: " + passwordFileDisplayName);
}
// attempt the authentication
if (tryFirstPass) {
try {
// attempt the authentication by getting the
// username and password from shared state
attemptAuthentication(true);
// authentication succeeded
succeeded = true;
if (logger.debugOn()) {
logger.debug("login",
"Authentication using cached password has succeeded");
}
return true;
} catch (LoginException le) {
// authentication failed -- try again below by prompting
cleanState();
logger.debug("login",
"Authentication using cached password has failed");
}
} else if (useFirstPass) {
try {
// attempt the authentication by getting the
// username and password from shared state
attemptAuthentication(true);
// authentication succeeded
succeeded = true;
if (logger.debugOn()) {
logger.debug("login",
"Authentication using cached password has succeeded");
}
return true;
} catch (LoginException le) {
// authentication failed
cleanState();
logger.debug("login",
"Authentication using cached password has failed");
throw le;
}
}
if (logger.debugOn()) {
logger.debug("login", "Acquiring password");
}
// attempt the authentication using the supplied username and password
try {
attemptAuthentication(false);
// authentication succeeded
succeeded = true;
if (logger.debugOn()) {
logger.debug("login", "Authentication has succeeded");
}
return true;
} catch (LoginException le) {
cleanState();
logger.debug("login", "Authentication has failed");
throw le;
}
}
/**
* Complete user authentication (Authentication Phase 2).
*
*
This method is called if the LoginContext's * overall authentication has succeeded * (all the relevant REQUIRED, REQUISITE, SUFFICIENT and OPTIONAL * LoginModules have succeeded). * *
If this LoginModule's own authentication attempt
* succeeded (checked by retrieving the private state saved by the
* login method), then this method associates a
* JMXPrincipal with the Subject located in the
* LoginModule. If this LoginModule's own
* authentication attempted failed, then this method removes
* any state that was originally saved.
*
* @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 {
if (subject.isReadOnly()) {
cleanState();
throw new LoginException("Subject is read-only");
}
// add Principals to the Subject
if (!subject.getPrincipals().contains(user)) {
subject.getPrincipals().add(user);
}
if (logger.debugOn()) {
logger.debug("commit",
"Authentication has completed successfully");
}
}
// in any case, clean out state
cleanState();
commitSucceeded = true;
return true;
}
/**
* Abort user authentication (Authentication Phase 2).
*
*
This method is called if the LoginContext's overall authentication * failed (the relevant REQUIRED, REQUISITE, SUFFICIENT and OPTIONAL * LoginModules did not succeed). * *
If this LoginModule's own authentication attempt
* succeeded (checked by retrieving the private state saved by the
* login and commit methods),
* then this method cleans up any state that was originally saved.
*
* @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 (logger.debugOn()) {
logger.debug("abort",
"Authentication has not completed successfully");
}
if (succeeded == false) {
return false;
} else if (succeeded == true && commitSucceeded == false) {
// Clean out state
succeeded = false;
cleanState();
user = null;
} else {
// overall authentication succeeded and commit succeeded,
// but someone else's commit failed
logout();
}
return true;
}
/**
* Logout a user.
*
*
This method removes the Principals
* that were added by the Also note that this method will set the username and password
* values in the shared state in case subsequent LoginModules
* want to use them via use/tryFirstPass.
*
* @param usePasswdFromSharedState boolean that tells this method whether
* to retrieve the password from the sharedState.
*/
private void getUsernamePassword(boolean usePasswdFromSharedState)
throws LoginException {
if (usePasswdFromSharedState) {
// use the password saved by the first module in the stack
username = (String)sharedState.get(USERNAME_KEY);
password = (char[])sharedState.get(PASSWORD_KEY);
return;
}
// acquire username and password
if (callbackHandler == null)
throw new LoginException("Error: no CallbackHandler available " +
"to garner authentication information from the user");
Callback[] callbacks = new Callback[2];
callbacks[0] = new NameCallback("username");
callbacks[1] = new PasswordCallback("password", false);
try {
callbackHandler.handle(callbacks);
username = ((NameCallback)callbacks[0]).getName();
char[] tmpPassword = ((PasswordCallback)callbacks[1]).getPassword();
password = new char[tmpPassword.length];
System.arraycopy(tmpPassword, 0,
password, 0, tmpPassword.length);
((PasswordCallback)callbacks[1]).clearPassword();
} catch (IOException ioe) {
LoginException le = new LoginException(ioe.toString());
throw EnvHelp.initCause(le, ioe);
} catch (UnsupportedCallbackException uce) {
LoginException le = new LoginException(
"Error: " + uce.getCallback().toString() +
" not available to garner authentication " +
"information from the user");
throw EnvHelp.initCause(le, uce);
}
}
/**
* Clean out state because of a failed authentication attempt
*/
private void cleanState() {
username = null;
if (password != null) {
Arrays.fill(password, ' ');
password = null;
}
if (clearPass) {
sharedState.remove(USERNAME_KEY);
sharedState.remove(PASSWORD_KEY);
}
}
}
commit method.
*
* @exception LoginException if the logout fails.
* @return true in all cases since this LoginModule
* should not be ignored.
*/
public boolean logout() throws LoginException {
if (subject.isReadOnly()) {
cleanState();
throw new LoginException ("Subject is read-only");
}
subject.getPrincipals().remove(user);
// clean out state
cleanState();
succeeded = false;
commitSucceeded = false;
user = null;
if (logger.debugOn()) {
logger.debug("logout", "Subject is being logged out");
}
return true;
}
/**
* Attempt authentication
*
* @param usePasswdFromSharedState a flag to tell this method whether
* to retrieve the password from the sharedState.
*/
@SuppressWarnings("unchecked") // sharedState used as Map