[mitreid-connect] UMA Permission ticket claims

Luiz Omori luiz.omori at duke.edu
Wed Dec 2 09:22:22 EST 2015 

I have tried quite a few combinations and even was stepping in the code to see what was happening but no luck. In particular with your suggestion I got the error below. I tried to add an iss parameter to the Claims Gathering request pointing to the same string as you sent too but the code where this message is triggered (OIDCAuthenticationFilter) doesn’t seem to be looking there for this presumably missing issuer. Configured servers or something appears to be missing in this case.
error.header 401 Unauthorized

error.message

Authentication Failed: No issuer found.

Regards,
Luiz

From: Justin Richer
Date: Tuesday, December 1, 2015 at 7:44 PM
To: Luiz Omori
Cc: "mitreid-connect at mit.edu<mailto:mitreid-connect at mit.edu>"
Subject: Re: [mitreid-connect] UMA Permission ticket claims

Looks like you’re entering a string into the login form that the Webfinger resolver can’t handle. Have you tried just doing “http://localhost:8080/uma-server-webapp-1.2.2.2/“ instead?

I know the form is labeled “email address” but that’s only if you’ve got a proper webfinger domain setup, which you don’t have if you’re running on localhost in a dev environment.

 — Justin

On Dec 1, 2015, at 4:03 PM, Luiz Omori <luiz.omori at duke.edu<mailto:luiz.omori at duke.edu>> wrote:

The problem that I faced was caused by the fact that the Request Party was logged in already. That caused the collectClaims to be called with a different set of parameters. See below the hack that I did for my tests. That allowed me to proceed all the way to receive a proper RPT token.

If I use another browser to the claims gathering endpoint then I get the ‘no server configuration…”.

As a general comment for UMA, the protocol is a bit convoluted, eh?
error.header 401 Unauthorized

error.message

Authentication Failed: No server configuration found for issuer: admin at localhost:8080/uma-server-webapp-1.2.2

…
public String collectClaims(@RequestParam("client_id") String clientId, @RequestParam(value = "redirect_uri", required = false) String redirectUri,
@RequestParam("ticket") String ticketValue, @RequestParam(value = "state", required = false) String state,
ModelMap m, OAuth2Authentication auth) {
//ModelMap m, OIDCAuthenticationToken auth) {

ClientDetailsEntity client = clientService.loadClientByClientId(clientId);

PermissionTicket ticket = permissionService.getByTicket(ticketValue);

if (client == null || ticket == null) {
logger.info("Client or ticket not found: " + clientId + " :: " + ticketValue);
m.addAttribute(HttpCodeView.CODE, HttpStatus.NOT_FOUND);
return HttpCodeView.VIEWNAME;
}

// we've got a client and ticket, let's attach the claims that we have from the token and userinfo

// subject
Set<Claim> claimsSupplied = Sets.newHashSet(ticket.getClaimsSupplied());

                //String issuer = auth.getIssuer();
                //UserInfo userInfo = auth.getUserInfo();
                //String sub = auth.getSub();

                String issuer = config.getIssuer();
                UserInfo userInfo = userService.getByUsernameAndClientId(auth.getPrincipal().toString(), client.getClientId());
                String sub = userInfo.getSub();

…

Regards,
Luiz

From: Luiz Omori
Date: Monday, November 30, 2015 at 5:42 PM
To: Justin Richer
Cc: "mitreid-connect at mit.edu<mailto:mitreid-connect at mit.edu>"
Subject: Re: [mitreid-connect] UMA Permission ticket claims


Humm, now I’m getting the error below in my embedded web browser (Java standalone app). Looking at the code it looks to me that the discrepancy is in the Model parameter. That particular call is expecting org.springframework.ui.Model but org.springframework.ui.ModelMap is being provided??

error.header NestedServletException (500)
error.message

Request processing failed; nested exception is java.lang.IllegalStateException: argument type mismatch HandlerMethod details: Controller [org.mitre.uma.web.ClaimsCollectionEndpoint] Method [public java.lang.String org.mitre.uma.web.ClaimsCollectionEndpoint.collectClaims(java.lang.String,java.lang.String,java.lang.String,java.lang.String,org.springframework.ui.Model,org.mitre.openid.connect.model.OIDCAuthenticationToken)] Resolved arguments: [0] [type=java.lang.String] [value=c] [1] [null] [2] [type=java.lang.String] [value=f8223604-65f9-4173-9572-329545cf1ae4] [3] [null] [4] [type=org.springframework.validation.support.BindingAwareModelMap] [value={}] [5] [type=org.springframework.security.oauth2.provider.OAuth2Authentication] [value=org.springframework.security.oauth2.provider.OAuth2Authentication at fdb04e9d: Principal: admin; Credentials: [PROTECTED]; Authenticated: true; Details: remoteAddress=127.0.0.1, sessionId=<SESSION>, tokenValue=<TOKEN>; Granted Authorities: ROLE_USER, ROLE_ADMIN]

Regards,
Luiz

From: Justin Richer
Date: Monday, November 30, 2015 at 1:17 PM
To: Luiz Omori
Cc: "mitreid-connect at mit.edu<mailto:mitreid-connect at mit.edu>"
Subject: Re: [mitreid-connect] UMA Permission ticket claims

Yes, the UMA spec is completely full of holes and magic at that stage. I don’t have HTTP dumps but our implementation expects the client to send the requesting party, in a web browser, to the claims gathering endpoint. There, the requesting party will be prompted to enter their email address (technically, their webfinger identifier) to start an OpenID Connect login flow. Once that’s completed, the server will redirect back to the client’s claims redirect URI (not the normal redirect URI) with a parameter indicating that some claims have been submitted. At this stage, the client just needs to make the call to the RPT request again.

 — Justin


On Nov 30, 2015, at 1:14 PM, Luiz Omori <luiz.omori at duke.edu<mailto:luiz.omori at duke.edu>> wrote:

Thanks.

Would you have any examples (http dumps, code) of the last step you mentioned below? I think I have everything in place up to the first RPT request failure so now need to process properly the Authorization Server’s Request for Additional Information. I’m checking the spec but there are quite a few MAYs there.

Regards,
Luiz

From: Justin Richer
Date: Monday, November 30, 2015 at 12:37 PM
To: Luiz Omori
Cc: "mitreid-connect at mit.edu<mailto:mitreid-connect at mit.edu>"
Subject: Re: [mitreid-connect] UMA Permission ticket claims

First off, the UMA functionality is considered “beta” at this stage, so it’s functional but don’t be surprised if things do break from time to time. :)

With that in mind: The way the system works is that you need to set up a resource set, then set a policy on that set. The policy contains a set of claims that are required to be fulfilled before handing a token to the client. Our system will only take claims in the form of OpenID Connect identity claims. In particular, we’ve streamlined the UI to do an email-based check, using webfinger as a bridge between domains and systems.

After you have the policy set, you get a permissions ticket. This ticket doesn’t have any claims fulfilled on it yet, so when the client goes to get an RPT with it, it will fail. There are no claims inside the AAT or even associated with the AAT. (In a future version of the spec, the AAT is likely to be dropped entirely.)

The RS never provides claims to fulfill a ticket, that’s the job of the client and the RqP. In our implementation, the RqP needs to log in to the claims gathering endpoint with OpenID Connect, which will cause the claims associated with that user’s ID token and user profile to be associated with the ticket. The ticket will then need to be presented by the client to the RPT endpoint again to try to get the RPT. This time, if the claims in the ticket satisfy the claims in the resource set, then the token is granted.

Without this step, there’s absolutely no way to tell if the authorization server should issue the RPT.

 — Justin

On Nov 30, 2015, at 12:10 PM, Luiz Omori <luiz.omori at duke.edu<mailto:luiz.omori at duke.edu>> wrote:

Hi,

I have been trying to retrieve an UMA RPT token but it’s failing where AuthorizationRequestEndpoint tries to verify that the resource set required claims are provided in the permission ticket. I did create a sharing policy for the resource. Apparently my Permission Ticket is missing “email_verified”, “sub”, “email”. Questions:

  1.  Why is this verification done at all? Isn’t the Resource Server the one that requests Permission Tickets and provide them to the client? Shouldn’t the Resource Set required claims be verified against the claims within the AAT?
  2.  What is the correct way to pass claims during the Permission Ticket request? Currently my RS is requesting it by providing a PAT token and filling the body with resource_set_id plus some scopes.

ClaimProcessingResult result = claimsProcessingService.claimsAreSatisfied(rs, ticket);

I’m quite new to UMA.

Regards,
Luiz
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