I have ADFS server and proxy server installed and few Relying party trusts added to it for sso.It is SP initiated and it all works fine. I have restricted access to a AD group for one of the RP site. When non-member of the group tries to access the site using the SP initiated URL, it gives an error (Missing SAML attributes). When logs checked, it is found that for the non-group members claim value is passed as "nil". Is there any way we can redirect the unauthorised user to another page or simply displaying an error like " YOu are not allowed access".
Please help
Thanks in advance
If ADFS is configured to pass groups as Roles, then use IsInRole and use that to redirect to an error message.
Update:
This can be done by adding a so-called Issuance Authorization Rule.
Essentially:
Go to the Issuance Authorization Rules tab
Delete the default Permit Access To All Users rule
Click Add Rule
Select Permit or Deny Users Based on an Incoming Claim
Related
(Background: I am trying to use my website hosted on wix as a simple identity provider so my members can access a separate sveltekit app I am creating--without logging in again--on a separate server because I do not think I can create the app on the wix platform. Basically I just need the user id, but I would like to also ensure they are in fact authenticated on my Wix hosted site before granting access).
In multiple pages explaining single sign on, it is explained that when my browser requests a protected resource from a web server, the server can (if it is configured to do so) verify my identity via a separate identity provider. This is done via a redirect to the identify provider. If I am not authenticated by the identify provider, I am asked to authenticate (by entering username and password, or whatever).
Once I am authenticated (by logging in or by verifying the presence of a valid session id on the identify provider's server from a prior login), the identify provider then "redirects with token" or a "token can be passed to the original domain by a redirect" according to these web sites I have encountered.
But what does it mean to "redirect with token"? This conflicts with other reading I have done which points out that redirects cannot have authentication or other headers or data associated with them.
How does it come to pass that (1) the web server I made my original request from gets my token from the identify provider while at the same time (2) returning my requested resource to my browser instead of back to the identity provider's server?
"Redirect with token" is a common method used in single sign-on (SSO) systems to authenticate users. In this method, when a user tries to access a protected resource on a server, the server redirects the user's browser to the SSO login page, along with a token that identifies the resource being accessed and the server that is requesting authentication.
The user then enters their login credentials on the SSO login page. If the credentials are correct, the SSO system authenticates the user and sends them back to the original server, along with a token that indicates that the user has been authenticated. The server checks the token to confirm that the user has been authenticated, and if the token is valid, the user is granted access to the protected resource.
Redirecting with a token is a secure and efficient way to authenticate users across multiple servers, as it allows the servers to rely on the SSO system to authenticate users and eliminates the need for each server to store and manage its own set of login credentials.
I'm working on a multi tenant project where usernames are actually their email addresses and the domain of the email serves as a tenant identifier.
Now in keycloak I'll have different realms per tenant, but I want to have a single login page for all tenants and the actual realm that will do the authentication to be somehow resolved by the username (email address).
How do I go about doing that?
I found a thread on the mailing list (that I cant find now...) that discussed the same problem. It was something along the lines of - create a main realm that will "proxy" to the others, but I'm not quite sure how to do that.
I think Michał Łazowik's answer is on the right track, but for Single-Sign-On to work, it needs to be extended a little.
Keep in mind that because of KEYCLOAK-4593 if we have > 100 realms we may have to have multiple Keycloak servers also.
We'll need:
A separate HTTP server specifically for this purpose, auth-redirector.example.com.
An algorithm to determine the Keycloak server and realm from a username (email address).
Here would be the entire OAuth2 Authorization Code Flow:
An application discovers the user wants to log in. Before multiple realms, the realm's name would be a constant, so the application would redirect to:
https://keycloak.example.com/auth/realms/realname/protocol/openid-connect/auth?$get_params
Instead, it redirects to
https://auth-redirector.example.com/?$get_params
auth-redirector determines if it itself has a valid access token for this session, perhaps having to refresh the access token first from the Keycloak server that issued it (the user could have logged out and is trying to login as a different user that is served by a different realm).
If it has an valid access token we can determine the Keycloak server and realm from the username or email address in the access token and redirect to:
https://$keycloak_server/auth/$realm/realname/protocol/openid-connect/auth?$get_params
from here, the OAuth2 Authorization Code Flow proceeds as usual.
Else if it doesn't have a a valid access token, the auth-redirector stores the original app's $get_params as session data. It presents a form to the user asking for a username. When the user submits that, we can determine the Keycloak server and realm to use and then auth-redirector itself logs in to the Keycloak server using its own $get_params. Once the auth-redirector gets a call-back, it retrieves the access+refresh token from the Keycloak server and stores them in session data. It then, finally, redirects back to that same keycloak server and realm with the callers original $get_params (from session data). And the OAuth2 Authorization Code Flow proceeds as usual.
This is definitely a hack! But I think it could work. I'd love to try it out some day, time permitting.
Other hacks/solutions are needed for other OAuth2 flows...
The idea from the mailing list is to write a service (let's say auth-redirector.example.com) that has a single input field for email, finds realm based on domain and redirects to that realm's keycloak endpoint (e.g. auth.example.com/auth/realms/realm-name/etc…) while keeping all GET params.
You can find examples of direct login/registration URLs here: https://lists.jboss.org/pipermail/keycloak-user/2016-July/007045.html
One usability problem is that users would have to provide their email twice, I have not yet found a way to pass the username via the login URL.
I have seen a similar post but that was more related to ASP. I will explain my situation below.
I am developing a SP(Relying Party) and integrating with ADFS (IDP). Since I am in the integration phase, I want ADFS to forget that I have previously authenticated so that each time I hit the ADFS endpoint (/adfs/ls) with AuthnRequest, I want it to ask for my credentials.
I believe ADFS by default, remembers clients by their remote IP/host name so clearing cookies on client machine does not help. There was a post that gave a link to logout from IDP (https:///adfs/ls/?wa=wsignout1.0&wreply=https:///adfs/ls/?wa=wsignoutcleanup1.0). The ADFS says I have been logged out but when I hit ADFS endpoint, ADFS redirects back to SP with successful AuthResponse.
Can you please tell me how to force reauthenticate/logout on ADFS or point me to the right articles?
The FederatedPassiveSignInStatus control (which should be part of VS if you've installed all the WIF stuff) will help you. Add it to your app. and clicking it will log you out of everything.
Also AD FS: How to Invoke a WS-Federation Sign-Out
Add wfresh=0 as a URL parameter.
This parameter indicates "freshness requirements".
According to the spec:
If specified, this indicates the desired maximum age of authentication specified in minutes.
We have a Portlet running on Java/J2EE technology. It interacts with another application/system through HTTP request that requires user authentication. The current solution retrieves logged in user's user name and password from the Portal, and passes this information to back end systems using "HTTPClient" API's to retrieve content based on user's authentication and authorization.
There are efforts to enable site minder for the Portal. With site minder enablement, the Portal no longer provides logged in user's user name and password. The ideal way would be that back end application also has site minder enabled so that Portlet could pass the login token or cookie value.
Looking for interim approaches until the back end application is SiteMinder enabled. Is there a way we can enable/force user to enter user name and password ? I cannot think of such possibility because the Portlet code (using HTTP Client accesses the back end URL of the application, its not the browser). One possible way I can think of is, develop a new screen(UI) to have user enter user name and password within the Portlet and use that to authenticate with back end system through Java code. Please let me know if any other ideas.
Also, let me know if the question is confusing, I will provide more details.
Thanks
Siteminder can provide user information dynamically to connected applications in HTTP headers (uid, email address, etc.). This behaviour is configured on the Siteminder Policy Server. By default, the HTTP header SM_USER (or similar) contains the username of the authenticated user.
Then, you have to adapt your portlet code to fetch those headers from the request and feed it to the back-end application like you used to.
I wouldn't advise the use of the SM_USER header for tracking users. SM_USER contains the ID that was provided to the credential collector, and will change based on the type of authentication scheme used.
Example:
If you have an HTML forms based auth scheme that collects email address instead of UserID, the email address will be sent in the SM_USER header. In the case of an X.509 auth scheme the SubjectDN from the certificate will be in the SM_USER header.
The better choice would be to use the SM_UNIVERSALID header as that will always contain the Universal ID attribute. The Universal ID attribute is configured in the User Directory object (typically this is set to "uid").
I currently have two relying parties (RP) configured on my adfs 2.0 server. I also have two claims provider trusts. I simply want to restrict access to the first RP if the user belongs to claims provider 1.
Is there a claim rule I can put that would let me inspect the user's issuer and then grant access or not?
I'm also wondering if this behavior is even acceptable in a SSO infrastructure. Should I deploy two instances of ADFS 2.0 in order to support this (one trusts claims provider 1 while the other doesn't).
Thanks for any ideas or design inputs.
I don't know if this is a good idea, but this should work:
Add a custom rule to the claims provider you want to deny with content like this:
=> issue(Type = "http://schemas.YOURDOMAINHERE/claims/AccessRP_X", Value = "Deny");
Then on the RP, edit claim rules,
choose Issuance authorization rules,
Add Rule.
In the dialog, use
template "Permit or Deny Users based
on an Incoming Claim".
For incoming
claim type, use the same type as in
the custom rule.
In incoming claim
value, write Deny
And Choose the
radio button "Deny access to users
with this incoming claim".
Press finish
Hope this works for you.