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// Portions Copyright [2018] [Payara Foundation and/or its affiliates]
package com.sun.enterprise.security.jauth;
import java.util.Map;
import javax.security.auth.Subject;
import javax.security.auth.callback.CallbackHandler;
/**
* This interface describes a module that can be configured for a ServerAuthContext. The main purpose of this module is
* to validate client requests and to secure responses back to the client.
*
*
* A module implementation must assume it may be shared across different requests from different clients. It is the
* module implementation's responsibility to properly store and restore any state necessary to associate new requests
* with previous responses. A module that does not need to do so may remain completely stateless.
*
*
* Modules are passed a shared state Map that can be used to save state across a sequence of calls from
* validateRequest to secureResponse to disposeSubject. The same Map instance is
* guaranteed to be passed to all methods in the call sequence. Furthermore, it should be assumed that each call
* sequence is passed its own unique shared state Map instance.
*
* @version %I%, %G%
*/
public interface ServerAuthModule {
/**
* Initialize this module with a policy to enforce, a CallbackHandler, and administrative options.
*
*
* Either the the request policy or the response policy (or both) must be non-null.
*
* @param requestPolicy the request policy this module is to enforce, which may be null.
*
* @param responsePolicy the response policy this module is to enforce, which may be null.
*
* @param handler CallbackHandler used to request information from the caller.
*
* @param options administrative options.
*/
void initialize(AuthPolicy requestPolicy,
AuthPolicy responsePolicy,
CallbackHandler handler,
Map options);
/**
* Authenticate a client request.
*
*
* The AuthParam input parameter encapsulates the client request and server response objects. This ServerAuthModule
* validates the client request object (decrypts content and verifies a signature, for example).
*
* @param param an authentication parameter that encapsulates the client request and server response objects.
*
* @param subject the subject may be used by configured modules to store and Principals and credentials validated in the
* request.
*
* @param sharedState a Map for modules to save state across a sequence of calls from validateRequest to
* secureResponse to disposeSubject.
*
* @exception PendingException if the operation is pending (for example, when a module issues a challenge). The module
* must have updated the response object in the AuthParam.
*
* @exception FailureException if the authentication failed. The module must have updated the response object in the
* AuthParam.
*
* @exception AuthException if the operation failed.
*/
void validateRequest(AuthParam param,
Subject subject,
Map sharedState)
throws AuthException;
/**
* Secure the response to the client (sign and encrypt the response, for example).
*
* @param param an authentication parameter that encapsulates the client request and server response objects.
*
* @param subject the subject may be used by configured modules to obtain credentials needed to secure the response, or
* null. If null, the module may use a CallbackHandler to obtain the necessary information.
*
* @param sharedState a Map for modules to save state across a sequence of calls from validateRequest to
* secureResponse to disposeSubject.
*
* @exception AuthException if the operation failed.
*/
void secureResponse(AuthParam param,
Subject subject,
Map sharedState)
throws AuthException;
/**
* Dispose of the Subject.
*
*
* Remove Principals or credentials from the Subject object that were stored during validateRequest.
*
* @param subject the Subject instance to be disposed.
*
* @param sharedState a Map for modules to save state across a sequence of calls from validateRequest to
* secureResponse to disposeSubject.
*
* @exception AuthException if the operation failed.
*/
void disposeSubject(Subject subject, Map sharedState)
throws AuthException;
}