org.apache.catalina.realm

## Class JAASMemoryLoginModule

- java.lang.Object
- - org.apache.catalina.util.LifecycleBase
  - - org.apache.catalina.util.LifecycleMBeanBase
    - - org.apache.catalina.realm.RealmBase
      - - org.apache.catalina.realm.MemoryRealm
        - - org.apache.catalina.realm.JAASMemoryLoginModule

- All Implemented Interfaces:
    MBeanRegistration, LoginModule, Lifecycle, Realm

      public class JAASMemoryLoginModule
      extends MemoryRealm
      implements LoginModule

  Implementation of the JAAS LoginModule interface, primarily for use in testing `JAASRealm`. It utilizes an XML-format data file of username/password/role information identical to that supported by `org.apache.catalina.realm.MemoryRealm` (except that digested passwords are not supported).

  This class recognizes the following string-valued options, which are specified in the configuration file (and passed to our constructor in the `options` argument:

  - debug - Set to "true" to get debugging messages generated to System.out. The default value is `false`.
  - pathname - Relative (to the pathname specified by the "catalina.base" system property) or absolute pathname to the XML file containing our user information, in the format supported by `MemoryRealm`. The default value matches the MemoryRealm default.

  IMPLEMENTATION NOTE - This class implements `Realm` only to satisfy the calling requirements of the `GenericPrincipal` constructor. It does not actually perform the functionality required of a `Realm` implementation.

  Author:
    Craig R. McClanahan

- - ### Nested Class Summary

    - ### Nested classes/interfaces inherited from class org.apache.catalina.realm.RealmBase

      `RealmBase.AllRolesMode`

    - ### Nested classes/interfaces inherited from interface org.apache.catalina.Lifecycle

      `Lifecycle.SingleUse`

  - ### Field Summary

    Fields
    Modifier and Type | Field and Description
    --- | ---
    `protected CallbackHandler` | `callbackHandler` The callback handler responsible for answering our requests.
    `protected boolean` | `committed` Has our own `commit()` returned successfully?
    `protected Map<String,?>` | `options` The configuration information for this `LoginModule`.
    `protected String` | `pathname` The absolute or relative pathname to the XML configuration file.
    `protected Principal` | `principal` The `Principal` identified by our validation, or `null` if validation failed.
    `protected Map<String,?>` | `sharedState` The state information that is shared with other configured `LoginModule` instances.
    `protected Subject` | `subject` The subject for which we are performing authentication.

    - ### Fields inherited from class org.apache.catalina.realm.MemoryRealm

      `info, name`

    - ### Fields inherited from class org.apache.catalina.realm.RealmBase

      `allRolesMode, container, containerLog, digest, digestEncoding, md, md5Encoder, md5Helper, realmPath, sm, stripRealmForGss, support, validate, x509UsernameRetriever, x509UsernameRetrieverClassName`

    - ### Fields inherited from class org.apache.catalina.util.LifecycleMBeanBase

      `mserver`

    - ### Fields inherited from interface org.apache.catalina.Lifecycle

      `AFTER_DESTROY_EVENT, AFTER_INIT_EVENT, AFTER_START_EVENT, AFTER_STOP_EVENT, BEFORE_DESTROY_EVENT, BEFORE_INIT_EVENT, BEFORE_START_EVENT, BEFORE_STOP_EVENT, CONFIGURE_START_EVENT, CONFIGURE_STOP_EVENT, PERIODIC_EVENT, START_EVENT, STOP_EVENT`

  - ### Constructor Summary

    Constructors
    Constructor and Description
    `JAASMemoryLoginModule()`

  - ### Method Summary

    Methods
    Modifier and Type | Method and Description
    --- | ---
    `boolean` | `abort()` Phase 2 of authenticating a `Subject` when Phase 1 fails.
    `boolean` | `commit()` Phase 2 of authenticating a `Subject` when Phase 1 was successful.
    `void` | `initialize(Subject subject, CallbackHandler callbackHandler, Map<String,?> sharedState, Map<String,?> options)` Initialize this `LoginModule` with the specified configuration information.
    `protected void` | `load()` Load the contents of our configuration file.
    `boolean` | `login()` Phase 1 of authenticating a `Subject`.
    `boolean` | `logout()` Log out this user.

    - ### Methods inherited from class org.apache.catalina.realm.MemoryRealm

      `authenticate, getDigester, getInfo, getName, getPassword, getPathname, getPrincipal, getPrincipals, setPathname, startInternal`

    - ### Methods inherited from class org.apache.catalina.realm.RealmBase

      `addPropertyChangeListener, authenticate, authenticate, authenticate, authenticate, backgroundProcess, compareCredentials, digest, Digest, findSecurityConstraints, getAllRolesMode, getContainer, getDigest, getDigest, getDigestCharset, getDigestEncoding, getDomainInternal, getObjectNameKeyProperties, getPrincipal, getPrincipal, getRealmPath, getRealmSuffix, getServer, getTransportGuaranteeRedirectStatus, getValidate, getX509UsernameRetrieverClassName, hasMessageDigest, hasResourcePermission, hasRole, hasUserDataPermission, initInternal, isStripRealmForGss, main, removePropertyChangeListener, setAllRolesMode, setContainer, setDigest, setDigestEncoding, setRealmPath, setStripRealmForGss, setTransportGuaranteeRedirectStatus, setValidate, setX509UsernameRetrieverClassName, stopInternal, toString`

    - ### Methods inherited from class org.apache.catalina.util.LifecycleMBeanBase

      `destroyInternal, getDomain, getObjectName, postDeregister, postRegister, preDeregister, preRegister, register, setDomain, unregister`

    - ### Methods inherited from class org.apache.catalina.util.LifecycleBase

      `addLifecycleListener, destroy, findLifecycleListeners, fireLifecycleEvent, getState, getStateName, init, removeLifecycleListener, setState, setState, start, stop`

    - ### Methods inherited from class java.lang.Object

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

- - ### Field Detail

    - #### callbackHandler

          protected CallbackHandler callbackHandler

      The callback handler responsible for answering our requests.

    - #### committed

          protected boolean committed

      Has our own `commit()` returned successfully?

    - #### options

          protected Map<String,?> options

      The configuration information for this `LoginModule`.

    - #### pathname

          protected String pathname

      The absolute or relative pathname to the XML configuration file.

    - #### principal

          protected Principal principal

      The `Principal` identified by our validation, or `null` if validation failed.

    - #### sharedState

          protected Map<String,?> sharedState

      The state information that is shared with other configured `LoginModule` instances.

    - #### subject

          protected Subject subject

      The subject for which we are performing authentication.

  - ### Constructor Detail

    - #### JAASMemoryLoginModule

          public JAASMemoryLoginModule()

  - ### Method Detail

    - #### abort

          public boolean abort()
                        throws LoginException

      Phase 2 of authenticating a `Subject` when Phase 1 fails. This method is called if the `LoginContext` failed somewhere in the overall authentication chain.
      Specified by:
        `abort` in interface `LoginModule`
      Returns:
        `true` if this method succeeded, or `false` if this `LoginModule` should be ignored
      Throws:
        `LoginException` - if the abort fails

    - #### commit

          public boolean commit()
                         throws LoginException

      Phase 2 of authenticating a `Subject` when Phase 1 was successful. This method is called if the `LoginContext` succeeded in the overall authentication chain.
      Specified by:
        `commit` in interface `LoginModule`
      Returns:
        `true` if the authentication succeeded, or `false` if this `LoginModule` should be ignored
      Throws:
        `LoginException` - if the commit fails

    - #### initialize

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

      Initialize this `LoginModule` with the specified configuration information.
      Specified by:
        `initialize` in interface `LoginModule`
      Parameters:
        `subject` - The `Subject` to be authenticated
        `callbackHandler` - A `CallbackHandler` for communicating with the end user as necessary
        `sharedState` - State information shared with other `LoginModule` instances
        `options` - Configuration information for this specific `LoginModule` instance

    - #### login

          public boolean login()
                        throws LoginException

      Phase 1 of authenticating a `Subject`.
      Specified by:
        `login` in interface `LoginModule`
      Returns:
        `true` if the authentication succeeded, or `false` if this `LoginModule` should be ignored
      Throws:
        `LoginException` - if the authentication fails

    - #### logout

          public boolean logout()
                         throws LoginException

      Log out this user.
      Specified by:
        `logout` in interface `LoginModule`
      Returns:
        `true` in all cases because the `LoginModule` should not be ignored
      Throws:
        `LoginException` - if logging out failed

    - #### load

          protected void load()

      Load the contents of our configuration file.

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