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package com.sun.jaspic.config.helper;

import com.sun.jaspic.config.delegate.MessagePolicyDelegate;
import java.util.HashMap;
import java.util.Map;
import java.util.logging.Level;
import javax.security.auth.Subject;
import javax.security.auth.callback.CallbackHandler;
import javax.security.auth.message.AuthException;
import javax.security.auth.message.AuthStatus;
import javax.security.auth.message.MessageInfo;
import javax.security.auth.message.MessagePolicy;
import javax.security.auth.message.config.ClientAuthConfig;
import javax.security.auth.message.config.ClientAuthContext;
import javax.security.auth.message.module.ClientAuthModule;

/**
 *
 * @author Ron Monzillo
 */
public class ClientAuthConfigHelper extends AuthConfigHelper implements ClientAuthConfig {

    final static AuthStatus[] vR_SuccessValue = {AuthStatus.SUCCESS};
    final static AuthStatus[] sR_SuccessValue = {AuthStatus.SEND_SUCCESS};
    HashMap> contextMap;
    AuthContextHelper acHelper;

    protected ClientAuthConfigHelper(String loggerName, EpochCarrier providerEpoch,
            AuthContextHelper acHelper, MessagePolicyDelegate mpDelegate,
            String layer, String appContext, CallbackHandler cbh)
            throws AuthException {
        super(loggerName, providerEpoch, mpDelegate, layer, appContext, cbh);
        this.acHelper = acHelper;
    }

    protected void initializeContextMap() {
        contextMap = new HashMap>();
    }

    protected void refreshContextHelper() {
        acHelper.refresh();
    }

    protected ClientAuthContext createAuthContext(final String authContextID,
            final Map properties) throws AuthException {

        if (!acHelper.isProtected(new ClientAuthModule[0], authContextID)) {
            return null;
        }

        ClientAuthContext rvalue = new ClientAuthContext() {

            ClientAuthModule[] module = init();

            ClientAuthModule[] init() throws AuthException {

                ClientAuthModule[] m;
                try {
                    m = acHelper.getModules(new ClientAuthModule[0], authContextID);
                } catch (AuthException ae) {
                    logIfLevel(Level.SEVERE, ae,
                            "ClientAuthContext: ", authContextID,
                            "of AppContext: ", getAppContext(),
                            "unable to load client auth modules");
                    throw ae;
                }

                MessagePolicy requestPolicy =
                        mpDelegate.getRequestPolicy(authContextID, properties);
                MessagePolicy responsePolicy =
                        mpDelegate.getResponsePolicy(authContextID, properties);

                boolean noModules = true;
                for (int i = 0; i < m.length; i++) {
                    if (m[i] != null) {
                        if (isLoggable(Level.FINE)) {
                            logIfLevel(Level.FINE, null,
                                    "ClientAuthContext: ", authContextID,
                                    "of AppContext: ", getAppContext(),
                                    "initializing module");
                        }
                        noModules = false;
                        checkMessageTypes(m[i].getSupportedMessageTypes());
                        m[i].initialize(requestPolicy, responsePolicy,
                                cbh, acHelper.getInitProperties(i, properties));
                    }
                }
                if (noModules) {
                    logIfLevel(Level.WARNING, null,
                            "CLientAuthContext: ", authContextID,
                            "of AppContext: ", getAppContext(),
                            "contains no Auth Modules");
                }
                return m;
            }

            public AuthStatus validateResponse(MessageInfo arg0, Subject arg1, Subject arg2) throws AuthException {
                AuthStatus[] status = new AuthStatus[module.length];
                for (int i = 0; i < module.length; i++) {
                    if (module[i] == null) {
                        continue;
                    }
                    if (isLoggable(Level.FINE)) {
                        logIfLevel(Level.FINE, null,
                                "ClientAuthContext: ", authContextID,
                                "of AppContext: ", getAppContext(),
                                "calling vaidateResponse on module");
                    }
                    status[i] = module[i].validateResponse(arg0, arg1, arg2);
                    if (acHelper.exitContext(vR_SuccessValue, i, status[i])) {
                        return acHelper.getReturnStatus(vR_SuccessValue,
                                AuthStatus.SEND_FAILURE, status, i);
                    }
                }
                return acHelper.getReturnStatus(vR_SuccessValue,
                        AuthStatus.SEND_FAILURE, status, status.length - 1);
            }

            public AuthStatus secureRequest(MessageInfo arg0, Subject arg1) throws AuthException {
                AuthStatus[] status = new AuthStatus[module.length];
                for (int i = 0; i < module.length; i++) {
                    if (module[i] == null) {
                        continue;
                    }
                    if (isLoggable(Level.FINE)) {
                        logIfLevel(Level.FINE, null,
                                "ClientAuthContext: ", authContextID,
                                "of AppContext: ", getAppContext(),
                                "calling secureResponse on module");
                    }
                    status[i] = module[i].secureRequest(arg0, arg1);
                    if (acHelper.exitContext(sR_SuccessValue, i, status[i])) {
                        return acHelper.getReturnStatus(sR_SuccessValue,
                                AuthStatus.SEND_FAILURE, status, i);
                    }
                }
                return acHelper.getReturnStatus(sR_SuccessValue,
                        AuthStatus.SEND_FAILURE, status, status.length - 1);
            }

            public void cleanSubject(MessageInfo arg0, Subject arg1) throws AuthException {
                for (int i = 0; i < module.length; i++) {
                    if (module[i] == null) {
                        continue;
                    }
                    if (isLoggable(Level.FINE)) {
                        logIfLevel(Level.FINE, null,
                                "ClientAuthContext: ", authContextID,
                                "of AppContext: ", getAppContext(),
                                "calling cleanSubject on module");
                    }
                    module[i].cleanSubject(arg0, arg1);
                }
            }
        };
        return rvalue;
    }

    public ClientAuthContext getAuthContext(String authContextID,
            Subject subject, final Map properties) throws AuthException {
        return super.getContext(contextMap, authContextID, subject, properties);
    }

    public boolean isProtected() {
        return (!acHelper.returnsNullContexts() || mpDelegate.isProtected());
    }
}




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