# Uses of Package
javax.security.auth.callback

- Packages that use javax.security.auth.callback
  Package | Description
  --- | ---
  java.security | Provides the classes and interfaces for the security framework.
  javax.security.auth.callback | This package provides the classes necessary for services to interact with applications in order to retrieve information (authentication data including usernames or passwords, for example) or to display information (error and warning messages, for example).
  javax.security.auth.login | This package provides a pluggable authentication framework.
  javax.security.auth.spi | This package provides the interface to be used for implementing pluggable authentication modules.
  javax.security.sasl | Contains class and interfaces for supporting SASL.

- Classes in javax.security.auth.callback used by java.security
  Class and Description
  CallbackHandler An application implements a `CallbackHandler` and passes it to underlying security services so that they may interact with the application to retrieve specific authentication data, such as usernames and passwords, or to display certain information, such as error and warning messages.

- Classes in javax.security.auth.callback used by javax.security.auth.callback
  Class and Description
  Callback Implementations of this interface are passed to a `CallbackHandler`, allowing underlying security services the ability to interact with a calling application to retrieve specific authentication data such as usernames and passwords, or to display certain information, such as error and warning messages.
  UnsupportedCallbackException Signals that a `CallbackHandler` does not recognize a particular `Callback`.

- Classes in javax.security.auth.callback used by javax.security.auth.login
  Class and Description
  CallbackHandler An application implements a `CallbackHandler` and passes it to underlying security services so that they may interact with the application to retrieve specific authentication data, such as usernames and passwords, or to display certain information, such as error and warning messages.

- Classes in javax.security.auth.callback used by javax.security.auth.spi
  Class and Description
  CallbackHandler An application implements a `CallbackHandler` and passes it to underlying security services so that they may interact with the application to retrieve specific authentication data, such as usernames and passwords, or to display certain information, such as error and warning messages.

- Classes in javax.security.auth.callback used by javax.security.sasl
  Class and Description
  Callback Implementations of this interface are passed to a `CallbackHandler`, allowing underlying security services the ability to interact with a calling application to retrieve specific authentication data such as usernames and passwords, or to display certain information, such as error and warning messages.
  CallbackHandler An application implements a `CallbackHandler` and passes it to underlying security services so that they may interact with the application to retrieve specific authentication data, such as usernames and passwords, or to display certain information, such as error and warning messages.
  ChoiceCallback Underlying security services instantiate and pass a `ChoiceCallback` to the `handle` method of a `CallbackHandler` to display a list of choices and to retrieve the selected choice(s).
  TextInputCallback Underlying security services instantiate and pass a `TextInputCallback` to the `handle` method of a `CallbackHandler` to retrieve generic text information.

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