src/main/java/org/keycloak/protocol/cas/endpoints/ValidateEndpoint.java

@@ -43,7 +43,7 @@
    protected RealmModel realm;
    protected EventBuilder event;
    protected ClientModel client;
    protected ClientSessionModel clientSession;
    protected AuthenticatedClientSessionModel clientSession;

    public ValidateEndpoint(RealmModel realm, EventBuilder event) {
        this.realm = realm;
@@ -131,29 +131,32 @@

        String code = ticket.substring(CASLoginProtocol.SERVICE_TICKET_PREFIX.length());

        ClientSessionCode.ParseResult parseResult = ClientSessionCode.parseResult(code, session, realm);
        if (parseResult.isClientSessionNotFound() || parseResult.isIllegalHash()) {
            String[] parts = code.split("\\.");
            if (parts.length == 2) {
                event.detail(Details.CODE_ID, parts[1]);
            }
        String[] parts = code.split("\\.");
        if (parts.length == 4) {
            event.detail(Details.CODE_ID, parts[2]);
        }

        ClientSessionCode.ParseResult<AuthenticatedClientSessionModel> parseResult = ClientSessionCode.parseResult(code, null, session, realm, client, event, AuthenticatedClientSessionModel.class);
        if (parseResult.isAuthSessionNotFound() || parseResult.isIllegalHash()) {
            event.error(Errors.INVALID_CODE);
            if (parseResult.getClientSession() != null) {
                session.sessions().removeClientSession(realm, parseResult.getClientSession());

            // Attempt to use same code twice should invalidate existing clientSession
            AuthenticatedClientSessionModel clientSession = parseResult.getClientSession();
            if (clientSession != null) {
                clientSession.detachFromUserSession();
            }

            throw new CASValidationException(CASErrorCode.INVALID_TICKET, "Code not valid", Response.Status.BAD_REQUEST);
        }

        clientSession = parseResult.getClientSession();
        event.detail(Details.CODE_ID, clientSession.getId());

        if (!parseResult.getCode().isValid(ClientSessionModel.Action.CODE_TO_TOKEN.name(), ClientSessionCode.ActionType.CLIENT)) {
            event.error(Errors.INVALID_CODE);
        if (parseResult.isExpiredToken()) {
            event.error(Errors.EXPIRED_CODE);
            throw new CASValidationException(CASErrorCode.INVALID_TICKET, "Code is expired", Response.Status.BAD_REQUEST);
        }

        clientSession.setNote(CASLoginProtocol.SESSION_SERVICE_TICKET, ticket);
        parseResult.getCode().setAction(null);

        if (requireReauth && AuthenticationManager.isSSOAuthentication(clientSession)) {
            event.error(Errors.SESSION_EXPIRED);