package org.keycloak.protocol.cas.endpoints;
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import org.jboss.logging.Logger;
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import org.jboss.resteasy.annotations.cache.NoCache;
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import org.jboss.resteasy.spi.HttpRequest;
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import org.keycloak.common.ClientConnection;
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import org.keycloak.events.Details;
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import org.keycloak.events.Errors;
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import org.keycloak.events.EventBuilder;
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import org.keycloak.events.EventType;
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import org.keycloak.models.*;
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import org.keycloak.protocol.cas.CASLoginProtocol;
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import org.keycloak.protocol.cas.representations.CASErrorCode;
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import org.keycloak.protocol.cas.utils.CASValidationException;
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import org.keycloak.protocol.oidc.utils.RedirectUtils;
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import org.keycloak.services.managers.AuthenticationManager;
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import org.keycloak.services.managers.ClientSessionCode;
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import javax.ws.rs.GET;
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import javax.ws.rs.core.*;
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public class ValidateEndpoint {
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protected static final Logger logger = Logger.getLogger(ValidateEndpoint.class);
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private static final String RESPONSE_OK = "yes\n";
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private static final String RESPONSE_FAILED = "no\n";
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@Context
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protected KeycloakSession session;
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@Context
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protected ClientConnection clientConnection;
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@Context
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protected HttpRequest request;
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@Context
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protected HttpHeaders headers;
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protected RealmModel realm;
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protected EventBuilder event;
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protected ClientModel client;
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protected AuthenticatedClientSessionModel clientSession;
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public ValidateEndpoint(RealmModel realm, EventBuilder event) {
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this.realm = realm;
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this.event = event;
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}
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@GET
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@NoCache
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public Response build() {
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MultivaluedMap<String, String> params = session.getContext().getUri().getQueryParameters();
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String service = params.getFirst(CASLoginProtocol.SERVICE_PARAM);
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String ticket = params.getFirst(CASLoginProtocol.TICKET_PARAM);
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boolean renew = params.containsKey(CASLoginProtocol.RENEW_PARAM);
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event.event(EventType.CODE_TO_TOKEN);
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try {
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checkSsl();
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checkRealm();
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checkClient(service);
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checkTicket(ticket, renew);
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event.success();
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return successResponse();
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} catch (CASValidationException e) {
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return errorResponse(e);
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}
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}
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protected Response successResponse() {
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return Response.ok(RESPONSE_OK).type(MediaType.TEXT_PLAIN).build();
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}
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protected Response errorResponse(CASValidationException e) {
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return Response.status(e.getStatus()).entity(RESPONSE_FAILED).type(MediaType.TEXT_PLAIN).build();
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}
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private void checkSsl() {
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if (!session.getContext().getUri().getBaseUri().getScheme().equals("https") && realm.getSslRequired().isRequired(clientConnection)) {
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throw new CASValidationException(CASErrorCode.INVALID_REQUEST, "HTTPS required", Response.Status.FORBIDDEN);
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}
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}
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private void checkRealm() {
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if (!realm.isEnabled()) {
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throw new CASValidationException(CASErrorCode.INTERNAL_ERROR, "Realm not enabled", Response.Status.FORBIDDEN);
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}
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}
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private void checkClient(String service) {
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if (service == null) {
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event.error(Errors.INVALID_REQUEST);
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throw new CASValidationException(CASErrorCode.INVALID_REQUEST, "Missing parameter: " + CASLoginProtocol.SERVICE_PARAM, Response.Status.BAD_REQUEST);
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}
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client = realm.getClients().stream()
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.filter(c -> CASLoginProtocol.LOGIN_PROTOCOL.equals(c.getProtocol()))
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.filter(c -> RedirectUtils.verifyRedirectUri(session.getContext().getUri(), service, realm, c) != null)
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.findFirst().orElse(null);
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if (client == null) {
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event.error(Errors.CLIENT_NOT_FOUND);
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throw new CASValidationException(CASErrorCode.INVALID_SERVICE, "Client not found", Response.Status.BAD_REQUEST);
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}
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if (!client.isEnabled()) {
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event.error(Errors.CLIENT_DISABLED);
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throw new CASValidationException(CASErrorCode.INVALID_SERVICE, "Client disabled", Response.Status.BAD_REQUEST);
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}
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event.client(client.getClientId());
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session.getContext().setClient(client);
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}
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private void checkTicket(String ticket, boolean requireReauth) {
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if (ticket == null) {
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event.error(Errors.INVALID_CODE);
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throw new CASValidationException(CASErrorCode.INVALID_REQUEST, "Missing parameter: " + CASLoginProtocol.TICKET_PARAM, Response.Status.BAD_REQUEST);
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}
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if (!ticket.startsWith(CASLoginProtocol.SERVICE_TICKET_PREFIX)) {
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event.error(Errors.INVALID_CODE);
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throw new CASValidationException(CASErrorCode.INVALID_TICKET_SPEC, "Malformed service ticket", Response.Status.BAD_REQUEST);
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}
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String code = ticket.substring(CASLoginProtocol.SERVICE_TICKET_PREFIX.length());
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String[] parts = code.split("\\.");
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if (parts.length == 4) {
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event.detail(Details.CODE_ID, parts[2]);
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}
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ClientSessionCode.ParseResult<AuthenticatedClientSessionModel> parseResult = ClientSessionCode.parseResult(code, null, session, realm, client, event, AuthenticatedClientSessionModel.class);
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if (parseResult.isAuthSessionNotFound() || parseResult.isIllegalHash()) {
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event.error(Errors.INVALID_CODE);
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// Attempt to use same code twice should invalidate existing clientSession
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AuthenticatedClientSessionModel clientSession = parseResult.getClientSession();
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if (clientSession != null) {
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clientSession.detachFromUserSession();
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}
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throw new CASValidationException(CASErrorCode.INVALID_TICKET, "Code not valid", Response.Status.BAD_REQUEST);
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}
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clientSession = parseResult.getClientSession();
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if (parseResult.isExpiredToken()) {
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event.error(Errors.EXPIRED_CODE);
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throw new CASValidationException(CASErrorCode.INVALID_TICKET, "Code is expired", Response.Status.BAD_REQUEST);
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}
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clientSession.setNote(CASLoginProtocol.SESSION_SERVICE_TICKET, ticket);
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if (requireReauth && AuthenticationManager.isSSOAuthentication(clientSession)) {
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event.error(Errors.SESSION_EXPIRED);
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throw new CASValidationException(CASErrorCode.INVALID_TICKET, "Interactive authentication was requested but not performed", Response.Status.BAD_REQUEST);
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}
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UserSessionModel userSession = clientSession.getUserSession();
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if (userSession == null) {
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event.error(Errors.USER_SESSION_NOT_FOUND);
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throw new CASValidationException(CASErrorCode.INVALID_TICKET, "User session not found", Response.Status.BAD_REQUEST);
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}
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UserModel user = userSession.getUser();
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if (user == null) {
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event.error(Errors.USER_NOT_FOUND);
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throw new CASValidationException(CASErrorCode.INVALID_TICKET, "User not found", Response.Status.BAD_REQUEST);
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}
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if (!user.isEnabled()) {
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event.error(Errors.USER_DISABLED);
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throw new CASValidationException(CASErrorCode.INVALID_TICKET, "User disabled", Response.Status.BAD_REQUEST);
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}
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event.user(userSession.getUser());
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event.session(userSession.getId());
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if (!client.getClientId().equals(clientSession.getClient().getClientId())) {
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event.error(Errors.INVALID_CODE);
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throw new CASValidationException(CASErrorCode.INVALID_SERVICE, "Auth error", Response.Status.BAD_REQUEST);
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}
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if (!AuthenticationManager.isSessionValid(realm, userSession)) {
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event.error(Errors.USER_SESSION_NOT_FOUND);
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throw new CASValidationException(CASErrorCode.INVALID_TICKET, "Session not active", Response.Status.BAD_REQUEST);
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}
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}
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}
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