src/main/java/org/keycloak/protocol/cas/CASLoginProtocol.java

@@ -1,19 +1,29 @@
package org.keycloak.protocol.cas;

import org.apache.http.HttpEntity;
import org.jboss.logging.Logger;
import org.keycloak.common.util.KeycloakUriBuilder;
import org.keycloak.events.EventBuilder;
import org.keycloak.events.EventType;
import org.keycloak.forms.login.LoginFormsProvider;
import org.keycloak.models.*;
import org.keycloak.protocol.LoginProtocol;
import org.keycloak.protocol.cas.utils.LogoutHelper;
import org.keycloak.services.managers.ClientSessionCode;
import org.keycloak.services.managers.ResourceAdminManager;
import org.keycloak.sessions.AuthenticationSessionModel;
import org.keycloak.sessions.CommonClientSessionModel;

import javax.ws.rs.core.HttpHeaders;
import javax.ws.rs.core.Response;
import javax.ws.rs.core.UriInfo;
import java.io.IOException;
import java.lang.reflect.Method;
import java.net.URI;

public class CASLoginProtocol implements LoginProtocol {
    private static final Logger logger = Logger.getLogger(CASLoginProtocol.class);

    public static final String LOGIN_PROTOCOL = "cas";

    public static final String SERVICE_PARAM = "service";
@@ -25,6 +35,9 @@
    public static final String TICKET_RESPONSE_PARAM = "ticket";

    public static final String SERVICE_TICKET_PREFIX = "ST-";
    public static final String SESSION_SERVICE_TICKET = "service_ticket";

    public static final String LOGOUT_REDIRECT_URI = "CAS_LOGOUT_REDIRECT_URI";

    protected KeycloakSession session;
    protected RealmModel realm;
@@ -74,14 +87,24 @@
    }

    @Override
    public Response authenticated(UserSessionModel userSession, ClientSessionCode accessCode) {
        ClientSessionModel clientSession = accessCode.getClientSession();
    public Response authenticated(UserSessionModel userSession, AuthenticatedClientSessionModel clientSession) {
        ClientSessionCode<AuthenticatedClientSessionModel> accessCode = new ClientSessionCode<>(session, realm, clientSession);

        String service = clientSession.getRedirectUri();
        //TODO validate service
        accessCode.setAction(ClientSessionModel.Action.CODE_TO_TOKEN.name());

        String code;
        try {
            // Keycloak >3.4 branch: Method getCode was renamed to getOrGenerateCode, CODE_TO_TOKEN was removed
            Method getOrGenerateCode = ClientSessionCode.class.getMethod("getOrGenerateCode");
            code = (String) getOrGenerateCode.invoke(accessCode);
        } catch (ReflectiveOperationException e) {
            // Keycloak <=3.3 branch
            accessCode.setAction(CommonClientSessionModel.Action.CODE_TO_TOKEN.name());
            code = accessCode.getCode();
        }
        KeycloakUriBuilder uriBuilder = KeycloakUriBuilder.fromUri(service);
        uriBuilder.queryParam(TICKET_RESPONSE_PARAM, SERVICE_TICKET_PREFIX + accessCode.getCode());
        uriBuilder.queryParam(TICKET_RESPONSE_PARAM, SERVICE_TICKET_PREFIX + code);

        URI redirectUri = uriBuilder.build();

@@ -90,32 +113,56 @@
    }

    @Override
    public Response sendError(ClientSessionModel clientSession, Error error) {
    public Response sendError(AuthenticationSessionModel authSession, Error error) {
        return Response.serverError().entity(error).build();
    }

    @Override
    public void backchannelLogout(UserSessionModel userSession, ClientSessionModel clientSession) {
    public void backchannelLogout(UserSessionModel userSession, AuthenticatedClientSessionModel clientSession) {
        String logoutUrl = clientSession.getRedirectUri();
        String serviceTicket = clientSession.getNote(CASLoginProtocol.SESSION_SERVICE_TICKET);
        //check if session is fully authenticated (i.e. serviceValidate has been called)
        if (serviceTicket != null && !serviceTicket.isEmpty()) {
            sendSingleLogoutRequest(logoutUrl, serviceTicket);
        }
        ClientModel client = clientSession.getClient();
        new ResourceAdminManager(session).logoutClientSession(uriInfo.getRequestUri(), realm, client, clientSession);
    }

    private void sendSingleLogoutRequest(String logoutUrl, String serviceTicket) {
        HttpEntity requestEntity = LogoutHelper.buildSingleLogoutRequest(serviceTicket);
        try {
            LogoutHelper.postWithRedirect(session, logoutUrl, requestEntity);
            logger.debug("Sent CAS single logout for service " + logoutUrl);
        } catch (IOException e) {
            logger.warn("Failed to call CAS service for logout: " + logoutUrl, e);
        }
    }

    @Override
    public Response frontchannelLogout(UserSessionModel userSession, ClientSessionModel clientSession) {
    public Response frontchannelLogout(UserSessionModel userSession, AuthenticatedClientSessionModel clientSession) {
        // todo oidc redirect support
        throw new RuntimeException("NOT IMPLEMENTED");
    }

    @Override
    public Response finishLogout(UserSessionModel userSession) {
        String redirectUri = userSession.getNote(CASLoginProtocol.LOGOUT_REDIRECT_URI);

        event.event(EventType.LOGOUT);
        event.user(userSession.getUser()).session(userSession).success();
        return Response.ok().build();
        LoginFormsProvider infoPage = session.getProvider(LoginFormsProvider.class).setSuccess("Logout successful");
        if (redirectUri != null) {
            infoPage.setAttribute("pageRedirectUri", redirectUri);
        } else {
            infoPage.setAttribute("skipLink", true);
        }
        return infoPage.createInfoPage();
    }

    @Override
    public boolean requireReauthentication(UserSessionModel userSession, ClientSessionModel clientSession) {
        return "true".equals(clientSession.getNote(CASLoginProtocol.RENEW_PARAM));
    public boolean requireReauthentication(UserSessionModel userSession, AuthenticationSessionModel authSession) {
        return "true".equals(authSession.getClientNote(CASLoginProtocol.RENEW_PARAM));
    }

    @Override