# Class NTLoginModule

java.lang.Object
com.sun.security.auth.module.NTLoginModule

All Implemented Interfaces:
  `LoginModule`

public class NTLoginModule extends Object implements LoginModule
This `LoginModule` renders a user's NT security information as some number of `Principal`s and associates them with a `Subject`.

This LoginModule recognizes the debug option. If set to true in the login Configuration, debug messages will be output to the output stream, System.out.

This LoginModule also recognizes the debugNative option. If set to true in the login Configuration, debug messages from the native component of the module will be output to the output stream, System.out.

Since:
  1.4
See Also:
  - `LoginModule`

- ## Constructor Summary

  Constructors
  Constructor
  Description
  `NTLoginModule()`
  Creates an `NTLoginModule`.

- ## Method Summary

  Modifier and Type
  Method
  Description
  `boolean`
  `abort()`
  This method is called if the LoginContext's overall authentication failed.
  `boolean`
  `commit()`
  This method is called if the LoginContext's overall authentication succeeded (the relevant REQUIRED, REQUISITE, SUFFICIENT and OPTIONAL LoginModules succeeded).
  `void`
  `initialize(Subject subject, CallbackHandler callbackHandler, Map<String,?> sharedState, Map<String,?> options)`
  Initialize this `LoginModule`.
  `boolean`
  `login()`
  Import underlying NT system identity information.
  `boolean`
  `logout()`
  Logout the user.

  ### Methods declared in class java.lang.Object

  `clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait`

- ## Constructor Details

  - ### NTLoginModule

    public NTLoginModule()
    Creates an `NTLoginModule`.

- ## Method Details

  - ### initialize

    public void initialize(Subject subject, CallbackHandler callbackHandler, Map<String,?> sharedState, Map<String,?> options)
    Initialize this `LoginModule`.
    Specified by:
      `initialize` in interface `LoginModule`
    Parameters:
      `subject` - the `Subject` to be authenticated.
      `callbackHandler` - a `CallbackHandler` for communicating with the end user (prompting for usernames and passwords, for example). This particular LoginModule only extracts the underlying NT system information, so this parameter is ignored.
      `sharedState` - shared `LoginModule` state.
      `options` - options specified in the login `Configuration` for this particular `LoginModule`.

  - ### login

    public boolean login() throws LoginException
    Import underlying NT system identity information.
    Specified by:
      `login` in interface `LoginModule`
    Returns:
      true in all cases since this `LoginModule` should not be ignored.
    Throws:
      `FailedLoginException` - if the authentication fails.
      `LoginException` - if this `LoginModule` is unable to perform the authentication.

  - ### commit

    public boolean commit() throws LoginException
    This method is called if the LoginContext's overall authentication succeeded (the relevant REQUIRED, REQUISITE, SUFFICIENT and OPTIONAL LoginModules succeeded).

    If this LoginModule's own authentication attempt succeeded (checked by retrieving the private state saved by the `login` method), then this method associates some number of various `Principal`s with the `Subject` located in the `LoginModuleContext`. If this LoginModule's own authentication attempted failed, then this method removes any state that was originally saved.

    Specified by:
      `commit` in interface `LoginModule`
    Returns:
      true if this LoginModule's own login and commit attempts succeeded, or false otherwise.
    Throws:
      `LoginException` - if the commit fails.

  - ### abort

    public boolean abort() throws LoginException
    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.

    Specified by:
      `abort` in interface `LoginModule`
    Returns:
      false if this LoginModule's own login and/or commit attempts failed, and true otherwise.
    Throws:
      `LoginException` - if the abort fails.

  - ### logout

    public boolean logout() throws LoginException
    Logout the user.

    This method removes the `NTUserPrincipal`, `NTDomainPrincipal`, `NTSidUserPrincipal`, `NTSidDomainPrincipal`, `NTSidGroupPrincipal`s, and `NTSidPrimaryGroupPrincipal` that may have been added by the `commit` method.

    Specified by:
      `logout` in interface `LoginModule`
    Returns:
      true in all cases since this `LoginModule` should not be ignored.
    Throws:
      `LoginException` - if the logout fails.