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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 ClientAuthContext. The main purpose of this module
* is to secure requests and to validate received responses.
*
* A module implementation must assume it may be used
* to issue different requests as different clients.
* It is the module implementation's responsibility to properly
* store and restore any state as necessary.
* 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 secureRequest
* to validateResponse 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 ClientAuthModule {
/**
* 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);
/**
* Secure a request message.
*
*
Attach authentication credentials to an initial request,
* sign/encrypt a request, or respond to a server challenge, 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 Principals and credentials necessary to
* secure the request, or null. If null, the module may
* use a CallbackHandler to obtain any information necessary
* to secure the request.
*
* @param sharedState a Map for modules to save state across
* a sequence of calls from secureRequest
* to validateResponse to disposeSubject.
*
* @exception AuthException if the operation failed.
*/
void secureRequest(AuthParam param,
Subject subject,
Map sharedState)
throws AuthException;
/**
* Validate received response.
*
*
Validation may include verifying signature in response,
* or decrypting response contents, 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 the Principals and credentials related
* to the identity validated in the response.
*
* @param sharedState a Map for modules to save state across
* a sequence of calls from secureRequest
* to validateResponse to disposeSubject.
*
* @exception AuthException if the operation failed.
*/
void validateResponse(AuthParam param,
Subject subject,
Map sharedState)
throws AuthException;
/**
* Dispose of the Subject.
*
*
Remove Principals or credentials from the Subject object
* that were stored during validateResponse.
*
* @param subject Subject instance to be disposed.
*
* @param sharedState a Map for modules to save state across
* a sequence of calls from secureRequest
* to validateResponse to disposeSubject.
*
* @exception AuthException if the operation failed.
*/
void disposeSubject(Subject subject, Map sharedState)
throws AuthException;
}