singlesignon.java

This temp directory is used by the JVM for temporary file storage. The JVM is configured to use thi

        // of all session associated with the SSO.
        if (System.currentTimeMillis() - session.getLastAccessedTime() >=
            session.getMaxInactiveInterval() * 1000) {
            removeSession(ssoId, session);
        } else {
            // The session was logged out.
            // Deregister this single session id, invalidating 
            // associated sessions
            deregister(ssoId);
        }

    }


    // ---------------------------------------------------------- Valve Methods


    /**
     * Return descriptive information about this Valve implementation.
     */
    public String getInfo() {

        return (info);

    }


    /**
     * Perform single-sign-on support processing for this request.
     *
     * @param request The servlet request we are processing
     * @param response The servlet response we are creating
     * @param context The valve context used to invoke the next valve
     *  in the current processing pipeline
     *
     * @exception IOException if an input/output error occurs
     * @exception ServletException if a servlet error occurs
     */
    public void invoke(Request request, Response response,
                       ValveContext context)
        throws IOException, ServletException {

        // If this is not an HTTP request and response, just pass them on
        if (!(request instanceof HttpRequest) ||
            !(response instanceof HttpResponse)) {
            context.invokeNext(request, response);
            return;
        }
        HttpServletRequest hreq =
            (HttpServletRequest) request.getRequest();
        HttpServletResponse hres =
            (HttpServletResponse) response.getResponse();
        request.removeNote(Constants.REQ_SSOID_NOTE);

        // Has a valid user already been authenticated?
        if (debug >= 1)
            log("Process request for '" + hreq.getRequestURI() + "'");
        if (hreq.getUserPrincipal() != null) {
            if (debug >= 1)
                log(" Principal '" + hreq.getUserPrincipal().getName() +
                    "' has already been authenticated");
            context.invokeNext(request, response);
            return;
        }

        // Check for the single sign on cookie
        if (debug >= 1)
            log(" Checking for SSO cookie");
        Cookie cookie = null;
        Cookie cookies[] = hreq.getCookies();
        if (cookies == null)
            cookies = new Cookie[0];
        for (int i = 0; i < cookies.length; i++) {
            if (Constants.SINGLE_SIGN_ON_COOKIE.equals(cookies[i].getName())) {
                cookie = cookies[i];
                break;
            }
        }
        if (cookie == null) {
            if (debug >= 1)
                log(" SSO cookie is not present");
            context.invokeNext(request, response);
            return;
        }

        // Look up the cached Principal associated with this cookie value
        if (debug >= 1)
            log(" Checking for cached principal for " + cookie.getValue());
        SingleSignOnEntry entry = lookup(cookie.getValue());
        if (entry != null) {
            if (debug >= 1)
                log(" Found cached principal '" +
                    entry.getPrincipal().getName() + "' with auth type '" +
                    entry.getAuthType() + "'");
            request.setNote(Constants.REQ_SSOID_NOTE, cookie.getValue());
            // Only set security elements if reauthentication is not required
            if (!getRequireReauthentication()) {
                ((HttpRequest) request).setAuthType(entry.getAuthType());
                ((HttpRequest) request).setUserPrincipal(entry.getPrincipal());
            }
        } else {
            if (debug >= 1)
                log(" No cached principal found, erasing SSO cookie");
            cookie.setMaxAge(0);
            hres.addCookie(cookie);
        }

        // Invoke the next Valve in our pipeline
        context.invokeNext(request, response);

    }


    // --------------------------------------------------------- Public Methods


    /**
     * Return a String rendering of this object.
     */
    public String toString() {

        StringBuffer sb = new StringBuffer("SingleSignOn[");
        if (container == null )
            sb.append("Container is null");
        else
            sb.append(container.getName());
        sb.append("]");
        return (sb.toString());

    }


    // ------------------------------------------------------ Protected Methods


    /**
     * Associate the specified single sign on identifier with the
     * specified Session.
     *
     * @param ssoId Single sign on identifier
     * @param session Session to be associated
     */
    protected void associate(String ssoId, Session session) {

        if (debug >= 1)
            log("Associate sso id " + ssoId + " with session " + session);

        SingleSignOnEntry sso = lookup(ssoId);
        if (sso != null)
            sso.addSession(this, session);
        synchronized (reverse) {
            reverse.put(session, ssoId);
        }

    }

    /**
     * Deregister the specified session.  If it is the last session,
     * then also get rid of the single sign on identifier
     *
     * @param ssoId Single sign on identifier
     * @param session Session to be deregistered
     */
    protected void deregister(String ssoId, Session session) {

        synchronized (reverse) {
            reverse.remove(session);
        }

        SingleSignOnEntry sso = lookup(ssoId);
        if ( sso == null )
            return;

        sso.removeSession( session );

        // see if we are the last session, if so blow away ssoId
        Session sessions[] = sso.findSessions();
        if ( sessions == null || sessions.length == 0 ) {
            synchronized (cache) {
                sso = (SingleSignOnEntry) cache.remove(ssoId);
            }
        }

    }


    /**
     * Deregister the specified single sign on identifier, and invalidate
     * any associated sessions.
     *
     * @param ssoId Single sign on identifier to deregister
     */
    protected void deregister(String ssoId) {

        if (debug >= 1)
            log("Deregistering sso id '" + ssoId + "'");

        // Look up and remove the corresponding SingleSignOnEntry
        SingleSignOnEntry sso = null;
        synchronized (cache) {
            sso = (SingleSignOnEntry) cache.remove(ssoId);
        }

        if (sso == null)
            return;

        // Expire any associated sessions
        Session sessions[] = sso.findSessions();
        for (int i = 0; i < sessions.length; i++) {
            if (debug >= 2)
                log(" Invalidating session " + sessions[i]);
            // Remove from reverse cache first to avoid recursion
            synchronized (reverse) {
                reverse.remove(sessions[i]);
            }
            // Invalidate this session
            sessions[i].expire();
        }

        // NOTE:  Clients may still possess the old single sign on cookie,
        // but it will be removed on the next request since it is no longer
        // in the cache

    }


    /**
     * Register the specified Principal as being associated with the specified
     * value for the single sign on identifier.
     *
     * @param ssoId Single sign on identifier to register
     * @param principal Associated user principal that is identified
     * @param authType Authentication type used to authenticate this
     *  user principal
     * @param username Username used to authenticate this user
     * @param password Password used to authenticate this user
     */
    protected void register(String ssoId, Principal principal, String authType,
                  String username, String password) {

        if (debug >= 1)
            log("Registering sso id '" + ssoId + "' for user '" +
                principal.getName() + "' with auth type '" + authType + "'");

        synchronized (cache) {
            cache.put(ssoId, new SingleSignOnEntry(principal, authType,
                                                   username, password));
        }

    }


    /**
     * Log a message on the Logger associated with our Container (if any).
     *
     * @param message Message to be logged
     */
    protected void log(String message) {

        Logger logger = container.getLogger();
        if (logger != null)
            logger.log(this.toString() + ": " + message);
        else
            System.out.println(this.toString() + ": " + message);

    }


    /**
     * Log a message on the Logger associated with our Container (if any).
     *
     * @param message Message to be logged
     * @param throwable Associated exception
     */
    protected void log(String message, Throwable throwable) {

        Logger logger = container.getLogger();
        if (logger != null)
            logger.log(this.toString() + ": " + message, throwable);
        else {
            System.out.println(this.toString() + ": " + message);
            throwable.printStackTrace(System.out);
        }

    }


    /**
     * Look up and return the cached SingleSignOn entry associated with this
     * sso id value, if there is one; otherwise return <code>null</code>.
     *
     * @param ssoId Single sign on identifier to look up
     */
    protected SingleSignOnEntry lookup(String ssoId) {

        synchronized (cache) {
            return ((SingleSignOnEntry) cache.get(ssoId));
        }

    }

    //----------------------------------------------  Package-Protected Methods


    /**
     * Remove a single Session from a SingleSignOn.  Called when
     * a session is timed out and no longer active.
     *
     * @param ssoId Single sign on identifier from which to remove the session.
     * @param session the session to be removed.
     */
    void removeSession(String ssoId, Session session) {

        if (debug >= 1)
            log("Removing session " + session.toString() + " from sso id " + 
                ssoId );

        // Get a reference to the SingleSignOn
        SingleSignOnEntry entry = lookup(ssoId);
        if (entry == null)
            return;

        // Remove the inactive session from SingleSignOnEntry
        entry.removeSession(session);

        // Remove the inactive session from the 'reverse' Map.
        synchronized(reverse) {
            reverse.remove(session);
        }

        // If there are not sessions left in the SingleSignOnEntry,
        // deregister the entry.
        if (entry.findSessions().length == 0) {
            deregister(ssoId);
        }
    }


    /**
     * Updates any <code>SingleSignOnEntry</code> found under key
     * <code>ssoId</code> with the given authentication data.
     * <p>
     * The purpose of this method is to allow an SSO entry that was
     * established without a username/password combination (i.e. established
     * following DIGEST or CLIENT-CERT authentication) to be updated with
     * a username and password if one becomes available through a subsequent
     * BASIC or FORM authentication.  The SSO entry will then be usable for
     * reauthentication.
     * <p>
     * <b>NOTE:</b> Only updates the SSO entry if a call to
     * <code>SingleSignOnEntry.getCanReauthenticate()</code> returns
     * <code>false</code>; otherwise, it is assumed that the SSO entry already
     * has sufficient information to allow reauthentication and that no update
     * is needed.
     *
     * @param ssoId identifier of Single sign to be updated
     * @param principal the <code>Principal</code> returned by the latest
     *                  call to <code>Realm.authenticate</code>.
     * @param authType  the type of authenticator used (BASIC, CLIENT-CERT,
     *                  DIGEST or FORM)
     * @param username  the username (if any) used for the authentication
     * @param password  the password (if any) used for the authentication
     */
    void update(String ssoId, Principal principal, String authType,
                  String username, String password) {

        SingleSignOnEntry sso = lookup(ssoId);
        if (sso != null && !sso.getCanReauthenticate()) {
            if (debug >= 1)
                log("Update sso id " + ssoId + " to auth type " + authType);

            synchronized(sso) {
                sso.updateCredentials(principal, authType, username, password);
            }

        }
    }

}