Using Spring Security preauthentication, my web app re-directs to /login_disabled.html upon hitting a InsufficientAuthenticationException.
sample of applicationContext-security-preauth.xml
<beans:property name="exceptionMappings">
<beans:props>
<beans:prop key="org.springframework.security.
InsufficientAuthenticationException">
/login_disabled.html
Based on this post, it seems that I should be able to re-direct the user to log in again.
Would I just need to re-direct the user to the webpage responsible for authentication?
It's not really clear for me what's the problem here. The redirection to the login page is automatically done without any further configuration if you have form-login set up. If the user tries to access a secured page without being authenticated, the ExceptionTranslationFilter invokes the AuthenticationEntryPoint to initiate authentication.
Using ExceptionMappingAuthenticationFailureHandler to map InsufficientAuthenticationException to a redirect-url won't work anyway because:
It's not indicating an authentication failre. It indicates the condition that the user is only anonymously authenticated while trying to access a secured resource. (As opposed to an auth failure such as entering bad credentials, or user has disabled status.)
It never even gets thrown. (Only instantiated and passed as a parameter in the above linked code.)
Related
In a Spring Security project I have configured Keycloak via the regular KeycloakWebSecurityConfigurerAdapter method. Everything works fine with Keycloak itself.
I now have added one specific URL that needs to be authorized via basic-auth. For that, I have configured a second configuration, with an antMatcher to that URL that has higher priority than the Keycloak-configuration. This works fine, when I access that URL, basic auth is triggered and I can authenticate for it.
But after authenticating for this URL, I can no longer authenticate via my Keycloak-specific URL. The current logic is as follows: I have a Keycloak-login URL (/auth/login), which is handled by a controller in my project. The handling method is annotated with #Secured, requiring the user to have a role that he only gets after authenticating with Keycloak. So for the first login, the request to the /auth/login URL is denied, an AccessDeniedException is thrown.
What Spring then automatically does in ExceptionTranslationFilter: It delegates the request to the authentication entrypoint, which is a Keycloak specific implementation which does all the magic.
The problem in this specific case is, however, that in ExceptionTranslationFilter#handleSpringSecurityException Spring will not delegate to the authentication entry point, if the user is not "anonymous". Because the user has previously authenticated for a basic-auth URL, Spring finds this authentication object in the context and then does not consider the user as anonymous. I guess the logic here is that Spring considered this a failed login-attempt or something.
What can I do so that Spring also delegates the request to the configured authentication entry point if it finds some unrelated authentication in the context?
I have an existing website that I want to do a proof of concept with OAuth2 / OIDC. To this end I've configured a locally running IdentityServer4 MVC app as my demo OIDC server following the IdentityServer4 quick setup guidelines. This works fine and navigating to:
http://localhost:5000/.well-known/openid-configuration
Lets me see the discovery document.
I have created a fake login page on this OIDC app which consists of just a login button with no user credentials required.
There's no actual user database and I'm just hard coding some user details to return when the 'authentication' occurs.
In my pre-existing site I've added the OWIN middle wear and am configuring OIDC using the OpenIdConnectAuthenticationOptions. The clientId, scopes, secret etc all match as required and the authority is set to point to my locally running demo OIDC app (http://localhost:5000). The redirect url is set to return to my pre-existing site once authentication is complete.
This all appears to be fine but here's what I want to achieve and can't get working. On my pre-existing site when I navigate to any page that requires authentication I want the user to be redirected to the login page I created on OIDC app. They click the login button (no user details required) and are authenticated and redirected back to the original page.
Currently when I navigate to a protected page I am successfully redirected to the OIDC app but I am redirected to an error page and I don't know why. The error page gives me no detail, it's actually hard coded in the app.
When I look at the discovery document I see that the setting for the 'authorization_endpoint' is set to:
http://localhost:5000/connect/authorize
So I thought maybe I needed to either change that to point to Home/Login which is where I've created the dummy login form, or else I needed to actually create that connect/authorize endpoint and put my form there. Creating the end point makes no difference, it never gets hit and instead I just get the error page on my OIDC app. Changing it to home/login also appears to be ignored.
I am away from my main PC at the moment hence the lack of code snippets but essentially the set up is as per the IdentityServer4 quick setup guide and the OIDC app does appear to be working.
The issue is getting my pre-existing site to properly redirect to the login page.
I've been stuck on this for quite a while now and would like to even get to the stage of seeing the dummy login page. Any pointers are appreciated and again apologies for the lack of sample code.
UPDATE
I've got the login form appearing by setting the openidconfiguration like so:
Configuration = new OpenIdConnectConfiguration()
{
AuthorizationEndPoint = "http://localhost:5000/home/login"
}
However, this isn't logging me in when I click login. On that login action I'm doing this:
await HttpContext.SignInAsync("subjectId","username", authenticationProps);
And then redirecting back to my existing site. However it's not authenticating me and the redirect ends up being redirected back again to the login page.
UPDATE 2
I think the redirect URI should possibly be doing something more. Currently I do the following:
Try and access a restricted page -> Redirected to OIDC server -> Click Login (this sets the subject and user successfully) -> Am redirected to redirect URI which immediately bounces me back to the OIDC server.
So maybe the redirect URI is supposed to confirm login or otherwise do something?
So in the open id connect protocol, the authorize endpoint is used to validate the client information passed as query parameters (client_id, scopes, redirect_uri, etc). In your authentication server, none of that is being checked if all the endpoint does is return a form. Then again the validation can be tedious so keeping the authorize endpoint separate from the endpoint for logging in might be worth a thought.
The developers of Identity Server thought the same thing which is why they set up the endpoint (and endpoint validation) for you as part of the middleware. The validation uses the components that were injected (primarily the client_store, and your defined scopes) to be used by Identity Server.
After the framework validates your authorize request using your client store implementation, it will redirect the user to whichever login page you specify. The login page can be specified by changing it with the a delegate that can be passed in as the second parameter of 'AddIdentityServer' (that takes in something of type IdentityServerOptions that we'll refer to as just 'options'). In the delegate you can specify the login url of the page by changing the value of 'options.UserInteraction.LoginUrl' to the url of the login page.
After the user logs in and you call the signInAsync method on the HttpContext, you're actually supposed to redirect back to a query parameter passed to the login page referred to as the 'return_url' (which is basically the initial authorize endpoint request). This authorize endpoint further validates the cookie and will send the user back to the 'redirect_uri' (if consent on the client is set to false) with a code (if using the authorization code flow) or the id_token and optionally the access token (if using the implicit flow).
Assuming the implicit flow for simplicity, the tokens can be found in the request to the 'redirect_uri' and from there it's all up to you. Commonly the client will issue some kind of cookie (which can potentially contain the id or access token) to mark the successful authentication by the identity provider.
I have setup when I'm using Auth0 to SSO through ADFS into a Spring Security Application, using saml all the way through. So, it looks like this:
Auth0 ----> ADFS ----> SpringSecurity App.
I have control of Auth0, but it's simulating a third party that would integrate with our ADFS server.
This works fine.
To do logout, I minimally want to destroy the sessions on the SpringSecurity App and the ADFS application. When I call logout the first time, a SAML logout request gets passed to ADFS. ADFS then passes a Logout request to Auth0, where it ends. This destroys the session.
However, if, without closing the browser, I SSO in again and then logout, ADFS rejects the logout request with a urn:oasis:names:tc:SAML:2.0:status:Requester, meaning it didn't like something about my request.
I've been able to narrow it down to the fact that there is a SAMLLogout cookie, with a domain of my ADFS server set. This appears to be set when the logout bounces over to Auth0, but is never removed. Calling logout when that cookie is present causes an error. When I delete that one cookie, I can logout successfully (in that it destroys the ADFS session and sends a logout request to Auth0). The cookie has a Session expiration, so closing and opening the browser also works.
I can post token requests and responses, but I don't think it has to do with the tokens itself. They are all signed correctly, and ADFS doesn't report any errors when doing the logout.
I don't necessarily need ADFS to call out to Auth0 (or any IdP) to destroy that session, I simply need it to destroy it's own session.
Instead of using destroy kindly use "unset" to avoid further problems with regards to your log out code. I don't know why but there are times that "destroy" causes problems with regards to log out button.
We came up with the following solution:
we have noticed that the adfs/ls/idpinitiatedsignon.aspx page has the "Sign out from all the sites that you have accessed." option that will kill the authentication cookies no matter how many times you logged in and logged out from different tabs.
We have create a duplicate copies of the idpinitiatedsignon.aspx and the idpinitiatedsignon.aspx.cs and renamed them (example logoutpage.aspx).
We have added the SingleLogout(); at the end of the Page_Init of the idpinitiatedsignon.aspx.cs so it reads:
protected void Page_Init( object sender, EventArgs e )
{
string rpIdentity = Context.Request.QueryString[RpIdentityQueryParameter];
//
// If the query string specified a certain relying party, sign in to that relying party.
//
if ( !String.IsNullOrEmpty( rpIdentity ) )
{
string decodedIdentity = Server.UrlDecode( rpIdentity );
if ( decodedIdentity == IdpAsRpIdentifier )
{
decodedIdentity = String.Empty;
}
SignIn( rpIdentity, new SignOnRequestParameters() );
}
else
{
PopulateConditionalVisibilityControls();
RelyingPartyDropDownList.DataSource = RelyingParties;
RelyingPartyDropDownList.DataBind();
UpdateText();
}
SingleLogout();
}
then we referenced this new page example logoutpage.aspx as the logout URL.
I hope this will save some research time for others who are facing this SAML Logout issue on ADFS v2.
I'm using shibboleth authentication in my application, and when user clicks Logout button, he will be directed to the ~/Shibboleth.sso/Logout link, it seems like a success when button clicked, but if I try to login using shibboleth one more time, it will not redirect to the Shibboleth Login page! instead it shows the previously logged on user (that I've logged out).
So session seems to be persistent even after logout!
But if before signing in again, I closed my browser, the user is redirected normally to the Shibboleth Login page.
So it seems like a session state or cookie problem!
I've used the following code to solve it:
if (Request.Cookies["shibsession"] != null)
{
HttpCookie myCookie = new HttpCookie("shibsession");
myCookie.Expires = DateTime.Now.AddDays(-1);
Response.Cookies.Add(myCookie);
}
Response.Redirect("~/Shibboleth.sso/Logout");
But it's not working!
Can any one help?
The URL Shibboleth.sso/Logout hit at Service Provider has no control over the IdP's session, nor could it. It can send SAML logout requests, or issue proprietary redirects.
Best practice: Logout handler should be handled by Identity provider.
Closing browser is only option after doing logout. Logout doesn't work at scale and it never will unless the browser vendors cooperate and just do it themselves. So you
could assume that closing the browser is the only option and that still
requires clearing cookies on latest browsers Chrome or Firefox.
I have a login page with a remember me checkbox when i actually checkbox and login it works and creates the cookie for me logging in the problem is when I logout it redirects me just fine but for some reason it keeps the rememberMe Cookie active so when I get back into the application from another page it immediately logs me in
What are some things I can look so that I can delete the cookie when i logout.
Try to configure your custom logout page if it differs from '/j_spring_security_logout'.
<http>
<logout logout-success-url="/logout.htm"/>
</http>
Specifying 'logout-success' parameter you say Spring that it have to delete the cookie after request with such address.
NOTE: any code mapped to this link ('/logout.htm') will be never executed 'cause of standard spring filters.