/**
* Validate the provided trust token.
*
* @param token : The token to validate
* @return boolean : True if the token is valid, False otherwise
*/
@Override
public boolean testTrustToken(JsonSessionState session, String token) {
String[] parts = StringUtils.split(token, ":");
// Check the length
if (parts.length != 4) {
log.error("TOKEN: Should have 4 parts, not {} : '{}'", parts.length, token);
return false;
}
// Check the parts
String username = parts[0];
String timestamp = parts[1];
String publicKey = parts[2];
String userToken = parts[3];
if (username.isEmpty() || timestamp.isEmpty() || publicKey.isEmpty() || userToken.isEmpty()) {
log.error("TOKEN: One or more parts are empty : '{}'", token);
return false;
}
// Make sure the publicKey is valid
if (!tokens.containsKey(publicKey)) {
log.error("TOKEN: Invalid public key : '{}'", publicKey);
return false;
}
String privateKey = tokens.get(publicKey);
Long expiry = tokenExpiry.get(publicKey);
// Check for valid timestamp & expiry
timestamp = getFormattedTime(timestamp);
if (timestamp == null) {
log.error("TOKEN: Invalid timestamp : '{}'", timestamp);
return false;
}
Long tokenTime = Long.valueOf(timestamp);
Long currentTime = Long.valueOf(getFormattedTime(null));
Long age = currentTime - tokenTime;
if (age > expiry) {
log.error("Token is passed its expiry : {}s old", age);
return false;
}
// Now validate the token itself
String tokenSeed = username + ":" + timestamp + ":" + privateKey;
String expectedToken = DigestUtils.md5Hex(tokenSeed);
if (userToken.equals(expectedToken)) {
// The token is valid
session.set("username", username);
session.set("source", TRUST_TOKEN_PREFIX + publicKey);
// Store it in case we redirect later
session.set("validToken", token);
return true;
}
// Token was not valid
log.error("TOKEN: Invalid token, hash does not match: '{}'", userToken);
return false;
}
@Override
public void ssoPrepareLogin(JsonSessionState session, String returnAddress, String server)
throws Exception {
logger.trace(
String.format("ssoPrepareLogin, Return Address: %s Server: %s", returnAddress, server));
session.set(RETURN_ADDRESS, returnAddress);
}
/**
* Get user details from SSO connection and set them in the user session.
*
* @return boolean: Flag whether a user was actually logged in or not.
*/
@Override
public boolean ssoCheckUserDetails(JsonSessionState session) {
// After the SSO roun-trip, restore any old query parameters we lost
List<String> currentParams = request.getParameterNames();
// Cast a copy of keySet() to array to avoid errors as we modify
String[] oldParams = session.keySet().toArray(new String[0]);
// Loop through session data...
for (String key : oldParams) {
// ... looking for SSO stored params
if (key.startsWith(SSO_STORAGE_PREFIX)) {
// Remove our prefix...
String oldParam = key.replace(SSO_STORAGE_PREFIX, "");
// ... and check if it survived the trip
if (!currentParams.contains(oldParam)) {
// No it didn't, add it to form data... the parameters are
// already accessible from there in Jython
String data = (String) session.get(key);
formData.set(oldParam, data);
// Don't forget to clear it from the session
session.remove(key);
}
}
}
// Check our SSO providers for valid logins
for (String ssoId : sso.keySet()) {
sso.get(ssoId).ssoCheckUserDetails(session);
GenericUser user = (GenericUser) sso.get(ssoId).getUserObject(session);
if (user != null) {
session.set("username", user.getUsername());
session.set("source", ssoId);
return true;
}
}
return false;
}
@SuppressWarnings("unchecked")
private void addAttr(String key, String value, JsonSessionState session) {
Object o = session.get(key);
List<String> l;
if (o == null) {
session.set(key, l = new ArrayList<String>());
} else {
l = (List<String>) o;
}
List<String> vals;
if (SHIB_ATTRIBUTE_DELIMITER != null) {
vals = Arrays.asList(value.split(SHIB_ATTRIBUTE_DELIMITER));
logger.trace(String.format("Adding: %s : %s", key, vals));
} else {
vals = new ArrayList<String>();
vals.add(value);
}
l.addAll(vals);
}
/**
* Initialize the SSO Service, prepare a login if required
*
* @param session The server session data
* @throws Exception if any errors occur
*/
@Override
public String ssoInit(JsonSessionState session) throws Exception {
// Keep track of the user switching portals for
// link building in other methods
String portalId = (String) session.get("portalId", defaultPortal);
ssoLoginUrl = serverUrlBase + portalId + SSO_LOGIN_PAGE;
// Find out what page we are on
String path = request.getAttribute("RequestURI").toString();
String currentAddress = serverUrlBase + path;
// Store the portal URL, might be required by implementers to build
// an interface (images etc).
session.set("ssoPortalUrl", serverUrlBase + portalId);
// Makes sure all SSO plugins get initialised
for (String ssoId : sso.keySet()) {
sso.get(ssoId).ssoInit(session, rg.getHTTPServletRequest());
}
// Are we logging in right now?
String ssoId = request.getParameter("ssoId");
// If this isn't the login page...
if (!currentAddress.contains(SSO_LOGIN_PAGE)) {
// Store the current address for use later
session.set("returnAddress", currentAddress);
// We might still be logging in from a deep link
if (ssoId == null) {
// No we're not, finished now
return null;
} else {
// Yes it's a deep link, store any extra query params
// since they probably won't survive the round-trip
// through SSO.
for (String param : request.getParameterNames()) {
if (!param.equals("ssoId")) {
// Store all the other parameters
session.set(SSO_STORAGE_PREFIX + param, request.getParameter(param));
}
}
}
}
// Get the last address to return the user to
String returnAddress = (String) session.get("returnAddress");
if (returnAddress == null) {
// Or use the home page
returnAddress = serverUrlBase + portalId + "/home";
}
// Which SSO provider did the user request?
if (ssoId == null) {
log.error("==== SSO: SSO ID not found!");
return null;
}
if (!sso.containsKey(ssoId)) {
log.error("==== SSO: SSO ID invalid: '{}'!", ssoId);
return null;
}
// The main event... finally
sso.get(ssoId).ssoPrepareLogin(session, returnAddress, serverUrlBase);
return ssoId;
}
/**
* Wrapper method for other SSO methods provided by the security manager. If desired, the security
* manager can take care of the integration using the default usage pattern, rather then calling
* them individually.
*
* @param session : The session of the current request
* @param formData : FormData object for the current request
* @return boolean : True if SSO has redirected, in which case no response should be sent by
* Dispatch, otherwise False.
*/
@Override
public boolean runSsoIntegration(JsonSessionState session, FormData formData) {
this.formData = formData;
// Used in integrating with thrid party systems. They can send us a
// user, we will log them in via a SSO round-trip, then send them back
// to the external system
String returnUrl = request.getParameter("returnUrl");
if (returnUrl != null) {
log.info("External redirect requested: '{}'", returnUrl);
session.set("ssoReturnUrl", returnUrl);
}
// The URL parameters can contain a trust token
String utoken = request.getParameter("token");
String stoken = (String) session.get("validToken");
String token = null;
// Or an 'old' token still in the session
if (stoken != null) {
token = stoken;
}
// But give the URL priority
if (utoken != null) {
token = utoken;
}
if (token != null) {
// Valid token
if (testTrustToken(session, token)) {
// Dispatch can continue
return false;
}
// Invalid token
// Given that trust tokens are designed for system integration
// we are going to fail with a non-branded error message
try {
response.sendError(HttpServletResponse.SC_FORBIDDEN, "Invalid or expired security token!");
} catch (IOException ex) {
log.error("Error sending 403 response to client!");
}
// We don't want Dispatch to send a response
return true;
}
// Single Sign-On integration
try {
// Instantiate with access to the session
String ssoId = ssoInit(session);
if (ssoId != null) {
// We are logging in, so send them to the SSO portal
String ssoUrl = ssoGetRemoteLogonURL(session, ssoId);
if (ssoUrl != null) {
log.info("Redirect to external URL: '{}'", ssoUrl);
response.sendRedirect(ssoUrl);
return true;
}
} else {
// Otherwise, check if we have user's details
boolean valid = ssoCheckUserDetails(session);
// If we validly logged in an SSO user, check for an
// external redirect to third party systems
if (valid) {
returnUrl = (String) session.get("ssoReturnUrl");
if (returnUrl != null) {
log.info("Redirect to external URL: '{}'", returnUrl);
session.remove("ssoReturnUrl");
response.sendRedirect(returnUrl);
return true;
}
}
}
} catch (Exception ex) {
log.error("SSO Error!", ex);
}
return false;
}
