Class UnixLoginModule

java.lang.Object
com.sun.security.auth.module.UnixLoginModule
All Implemented Interfaces:
LoginModule

public class UnixLoginModule extends Object implements LoginModule
This LoginModule imports a user's Unix Principal information (UnixPrincipal, UnixNumericUserPrincipal, and UnixNumericGroupPrincipal) and associates them with the current 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.

Since:
1.4
  • Constructor Summary

    Constructors
    Constructor
    Description
    Creates a UnixLoginModule.
  • Method Summary

    Modifier and Type
    Method
    Description
    boolean
    Abort the authentication (second phase).
    boolean
    Commit the authentication (second phase).
    void
    initialize(Subject subject, CallbackHandler callbackHandler, Map<String,?> sharedState, Map<String,?> options)
    Initialize this LoginModule.
    boolean
    Authenticate the user (first phase).
    boolean
    Logout the user

    Methods declared in class Object

    clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait
    Modifier and Type
    Method
    Description
    protected Object
    Creates and returns a copy of this object.
    boolean
    Indicates whether some other object is "equal to" this one.
    protected void
    Deprecated, for removal: This API element is subject to removal in a future version.
    Finalization is deprecated and subject to removal in a future release.
    final Class<?>
    Returns the runtime class of this Object.
    int
    Returns a hash code value for this object.
    final void
    Wakes up a single thread that is waiting on this object's monitor.
    final void
    Wakes up all threads that are waiting on this object's monitor.
    Returns a string representation of the object.
    final void
    Causes the current thread to wait until it is awakened, typically by being notified or interrupted.
    final void
    wait(long timeoutMillis)
    Causes the current thread to wait until it is awakened, typically by being notified or interrupted, or until a certain amount of real time has elapsed.
    final void
    wait(long timeoutMillis, int nanos)
    Causes the current thread to wait until it is awakened, typically by being notified or interrupted, or until a certain amount of real time has elapsed.
  • Constructor Details

    • UnixLoginModule

      public UnixLoginModule()
      Creates a UnixLoginModule.
  • 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).
      sharedState - shared LoginModule state.
      options - options specified in the login Configuration for this particular LoginModule.
    • login

      public boolean login() throws LoginException
      Authenticate the user (first phase).

      The implementation of this method attempts to retrieve the user's Unix Subject information by making a native Unix system call.

      Specified by:
      login in interface LoginModule
      Returns:
      true in all cases (this LoginModule should not be ignored).
      Throws:
      FailedLoginException - if attempts to retrieve the underlying system information fail.
      LoginException - if the authentication fails
    • commit

      public boolean commit() throws LoginException
      Commit the authentication (second phase).

      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 (the importing of the Unix authentication information succeeded), then this method associates the Unix Principals with the Subject currently tied to the LoginModule. If this LoginModule's 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
      Abort the authentication (second phase).

      This method is called if the LoginContext's overall authentication failed. (the relevant REQUIRED, REQUISITE, SUFFICIENT and OPTIONAL LoginModules did not succeed).

      This method cleans up any state that was originally saved as part of the authentication attempt from the login and commit methods.

      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 Principals associated with the Subject.

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