Package org.apache.jackrabbit.oak.spi.security.authentication

Class AbstractLoginModule

java.lang.Object

org.apache.jackrabbit.oak.spi.security.authentication.AbstractLoginModule

All Implemented Interfaces:

LoginModule

@ProviderType
public abstract class AbstractLoginModule
extends Object
implements LoginModule

Abstract implementation of the LoginModule interface that can act as base class for login modules that aim to authenticate subjects against information stored in the content repository.

LoginModule Methods

This base class provides a simple implementation for the following methods of the LoginModule interface:

• Initialize: Initialization of this abstract module sets the following protected instance fields:
  • subject: The subject to be authenticated,
  • callbackHandler: The callback handler passed to the login module,
  • shareState: The map used to share state information with other login modules,
  • options: The configuration options of this login module as specified in the Configuration.
• Logout: If the authenticated subject is not empty this logout implementation attempts to clear both principals and public credentials and returns true.
• Abort: Clears the state of this login module by setting all private instance variables created in phase 1 or 2 to null. Subclasses are in charge of releasing their own state information by either overriding clearState().

Utility Methods

The following methods are provided in addition:

• clearState(): Clears all private state information that has be created during login. This method in called in abort() and subclasses are expected to override this method.
• getSupportedCredentials(): Abstract method used by getCredentials() that reveals which credential implementations are supported by the LoginModule.
• getCredentials(): Tries to retrieve valid (supported) Credentials in the following order:
  1. using a CredentialsCallback,
  2. looking for a SHARED_KEY_CREDENTIALS entry in the shared state (see also getSharedCredentials() and finally by
  3. searching for valid credentials in the subject.
• getSharedCredentials(): This method returns credentials passed to the login module with the share state. The key to share credentials with a another module extending from this base class is SHARED_KEY_CREDENTIALS. Note, that this method does not verify if the credentials provided by the shared state are supported.
• getSharedLoginName(): If the shared state contains an entry for SHARED_KEY_LOGIN_NAME this method returns the value as login name.
• getSecurityProvider(): Returns the configured security provider or null.
• getRoot(): Provides access to the latest state of the repository in order to retrieve user or principal information required to authenticate the subject as well as to write back information during LoginModule.commit().
• getUserManager(): Returns an instance of the configured UserManager or null.
• getPrincipalProvider(): Returns an instance of the configured principal provider or null.
• getPrincipals(String): Utility that returns all principals associated with a given user id. This method might be be called after successful authentication in order to be able to populate the subject during LoginModule.commit(). The implementation is a shortcut for calling getPrincipals(String userId on the provider exposed by getPrincipalProvider()

Field Summary

Fields

Modifier and Type	Field	Description
static final String	SHARED_KEY_ATTRIBUTES	Key of the sharedState entry referring to public attributes that are shared between multiple login modules.
static final String	SHARED_KEY_CREDENTIALS	Key of the sharedState entry referring to validated Credentials that is shared between multiple login modules.
static final String	SHARED_KEY_LOGIN_NAME	Key of the sharedState entry referring to a valid login ID that is shared between multiple login modules.
static final String	SHARED_KEY_PRE_AUTH_LOGIN	Key of the sharedState entry referring to pre authenticated login information that is shared between multiple login modules.

Constructor Summary

Constructors

Constructor	Description
AbstractLoginModule()

Method Summary

Modifier and Type	Method	Description
boolean	abort()
void	initialize(Subject subject, CallbackHandler callbackHandler, Map<String,?> sharedState, Map<String,?> options)
boolean	logout()	Besteffort default implementation of LoginModule.logout(), which removes all principals and all public credentials of type Credentials and AuthInfo from the subject.

Methods inherited from class java.lang.Object

equals, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Methods inherited from interface javax.security.auth.spi.LoginModule

commit, login

Field Details

SHARED_KEY_CREDENTIALS

public static final String SHARED_KEY_CREDENTIALS

Key of the sharedState entry referring to validated Credentials that is shared between multiple login modules.

See Also:

• Constant Field Values

SHARED_KEY_LOGIN_NAME

public static final String SHARED_KEY_LOGIN_NAME

Key of the sharedState entry referring to a valid login ID that is shared between multiple login modules.

See Also:

• Constant Field Values

SHARED_KEY_ATTRIBUTES

public static final String SHARED_KEY_ATTRIBUTES

Key of the sharedState entry referring to public attributes that are shared between multiple login modules.

See Also:

• Constant Field Values

SHARED_KEY_PRE_AUTH_LOGIN

public static final String SHARED_KEY_PRE_AUTH_LOGIN

Key of the sharedState entry referring to pre authenticated login information that is shared between multiple login modules.

Constructor Details

AbstractLoginModule

public AbstractLoginModule()

Method Details

initialize

public void initialize(Subject subject,
 CallbackHandler callbackHandler,
 Map<String,?> sharedState,
 Map<String,?> options)

Specified by:

initialize in interface LoginModule

logout

public boolean logout()
               throws LoginException

Besteffort default implementation of LoginModule.logout(), which removes all principals and all public credentials of type Credentials and AuthInfo from the subject. It will return false, if either principal set or credentials set is empty. Note, that this implementation is not able to only remove those principals/credentials that have been added by this very login module instance. Therefore subclasses should overwrite this method to provide a fully compliant solution of logout(). They may however take advantage of logout(Set, Set) in order to simplify the implementation of a logout that is compatible with the LoginModule.logout() contract incorporating the additional recommendations highlighted at JAAS LoginModule Dev Guide

Specified by:

logout in interface LoginModule

Returns:

true if neither principals nor public credentials of type Credentials or AuthInfo stored in the Subject are empty; false otherwise

Throws:

LoginException - if the subject is readonly and destroying Destroyable credentials fails with DestroyFailedException.

abort

public boolean abort()
              throws LoginException

Specified by:

abort in interface LoginModule

Throws:

LoginException