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/*
* Copyright (c) 2020, 2021 Contributors to Eclipse Foundation. All rights reserved.
* Copyright (c) 1997, 2020 Oracle and/or its affiliates and others.
* All rights reserved.
*
* This program and the accompanying materials are made available under the
* terms of the Eclipse Public License v. 2.0, which is available at
* http://www.eclipse.org/legal/epl-2.0.
*
* This Source Code may also be made available under the following Secondary
* Licenses when the conditions for such availability set forth in the
* Eclipse Public License v. 2.0 are satisfied: GNU General Public License,
* version 2 with the GNU Classpath Exception, which is available at
* https://www.gnu.org/software/classpath/license.html.
*
* SPDX-License-Identifier: EPL-2.0 OR GPL-2.0 WITH Classpath-exception-2.0
*/
package jakarta.security.auth.message;
import javax.security.auth.Subject;
/**
* An implementation of this interface is used to validate received service request messages, and to secure service
* response messages.
*
* @see MessageInfo
* @see Subject
*/
public interface ServerAuth {
/**
* Authenticate a received service request.
*
*
* This method is called to transform the mechanism-specific request message acquired by calling getRequestMessage (on
* messageInfo) into the validated application message to be returned to the message processing runtime. If the received
* message is a (mechanism-specific) meta-message, the method implementation must attempt to transform the meta-message
* into a corresponding mechanism-specific response message, or to the validated application request message. The
* runtime will bind a validated application message into the the corresponding service invocation.
*
*
* This method conveys the outcome of its message processing either by returning an AuthStatus value or by throwing an
* AuthException.
*
* @param messageInfo A contextual object that encapsulates the client request and server response objects, and that may
* be used to save state across a sequence of calls made to the methods of this interface for the purpose of completing
* a secure message exchange.
*
* @param clientSubject A Subject that represents the source of the service request. It is used by the method
* implementation to store Principals and credentials validated in the request.
*
* @param serviceSubject A Subject that represents the recipient of the service request, or null. It may be used by the
* method implementation as the source of Principals or credentials to be used to validate the request. If the Subject
* is not null, the method implementation may add additional Principals or credentials (pertaining to the recipient of
* the service request) to the Subject.
*
* @return An AuthStatus object representing the completion status of the processing performed by the method. The
* AuthStatus values that may be returned by this method are defined as follows:
*
*
* - AuthStatus.SUCCESS when the application request message was successfully validated. The validated request message
* is available by calling getRequestMessage on messageInfo.
*
*
- AuthStatus.SEND_SUCCESS to indicate that validation/processing of the request message successfully produced the
* secured application response message (in messageInfo). The secured response message is available by calling
* getResponseMessage on messageInfo.
*
*
- AuthStatus.SEND_CONTINUE to indicate that message validation is incomplete, and that a preliminary response was
* returned as the response message in messageInfo.
*
* When this status value is returned to challenge an application request message, the challenged request must be saved
* by the authentication module such that it can be recovered when the module's validateRequest message is called to
* process the request returned for the challenge.
*
*
- AuthStatus.SEND_FAILURE to indicate that message validation failed and that an appropriate failure response
* message is available by calling getResponseMessage on messageInfo.
*
*
* @exception AuthException When the message processing failed without establishing a failure response message (in
* messageInfo).
*/
AuthStatus validateRequest(MessageInfo messageInfo, Subject clientSubject, Subject serviceSubject) throws AuthException;
/**
* Secure a service response before sending it to the client.
*
* This method is called to transform the response message acquired by calling getResponseMessage (on messageInfo) into
* the mechanism-specific form to be sent by the runtime.
*
* This method conveys the outcome of its message processing either by returning an AuthStatus value or by throwing an
* AuthException.
*
* @param messageInfo A contextual object that encapsulates the client request and server response objects, and that may
* be used to save state across a sequence of calls made to the methods of this interface for the purpose of completing
* a secure message exchange.
*
* @param serviceSubject A Subject that represents the source of the service response, or null. It may be used by the
* method implementation to retrieve Principals and credentials necessary to secure the response. If the Subject is not
* null, the method implementation may add additional Principals or credentials (pertaining to the source of the service
* response) to the Subject.
*
* @return An AuthStatus object representing the completion status of the processing performed by the method. The
* AuthStatus values that may be returned by this method are defined as follows:
*
*
* - AuthStatus.SEND_SUCCESS when the application response message was successfully secured. The secured response
* message may be obtained by calling getResponseMessage on messageInfo.
*
*
- AuthStatus.SEND_CONTINUE to indicate that the application response message (within messageInfo) was replaced with
* a security message that should elicit a security-specific response (in the form of a request) from the peer.
*
* This status value serves to inform the calling runtime that (to successfully complete the message exchange) it will
* need to be capable of continuing the message dialog by processing at least one additional request/response exchange
* (after having sent the response message returned in messageInfo).
*
* When this status value is returned, the application response must be saved by the authentication module such that it
* can be recovered when the module's validateRequest message is called to process the elicited response.
*
*
- AuthStatus.SEND_FAILURE to indicate that a failure occurred while securing the response message and that an
* appropriate failure response message is available by calling getResponseMeessage on messageInfo.
*
*
* @exception AuthException When the message processing failed without establishing a failure response message (in
* messageInfo).
*/
default AuthStatus secureResponse(MessageInfo messageInfo, Subject serviceSubject) throws AuthException {
return AuthStatus.SEND_SUCCESS;
}
/**
* Remove method specific principals and credentials from the subject.
*
* @param messageInfo a contextual object that encapsulates the client request and server response objects, and that may
* be used to save state across a sequence of calls made to the methods of this interface for the purpose of completing
* a secure message exchange.
*
* @param subject the Subject instance from which the Principals and credentials are to be removed.
*
* @exception AuthException If an error occurs during the Subject processing.
*/
default void cleanSubject(MessageInfo messageInfo, Subject subject) throws AuthException {
}
}