[keycloak-dev] Accessing Token Endpoint with a User access token to get Permissions

[Pedro Igor Silva]

I'm not sure what is happening, this flow is similar to what we do in
quickstarts and tests. Could you please export your realm and send me the
file?



On Fri, Jun 22, 2018 at 11:52 AM, Mark McGuigan <
Mark.McGuigan at 360globalnet.com> wrote:

> HI Pedro,
>
>
>
> Sure, my process is as follows:
>
>    - Application forwards to Authorisation service to get a response type
>    of  ‘code’
>    - Authorisation service returns code and I forward it to the Token
>    endpoint (no bearer) to get an access token
>    - The Access Token contains the user authentication JWT at this point
>    (contains Roles but not permissions)
>    - Then I try to pass this access token as a ‘bearer’ to the token
>    endpoint to get user permission but this is where I get the 500 Error
>    described below
>
>
>
> Any pointers as to what I could be doing wrong would really be
> appreciated..
>
> Kind regards,
>
>
>
> Mark
>
>
>
>
>
> *From:* Pedro Igor Silva [mailto:psilva at redhat.com]
> *Sent:* 22 June 2018 15:42
> *To:* Mark McGuigan <Mark.McGuigan at 360globalnet.com>
> *Cc:* keycloak-dev at lists.jboss.org
> *Subject:* Re: [keycloak-dev] Accessing Token Endpoint with a User access
> token to get Permissions
>
>
>
> Hi,
>
>
>
> Are you sending the access token or ID token as a bearer ? Could you give
> more details on how you are obtaining the token ?
>
>
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> On Wed, Jun 20, 2018 at 5:52 AM, Mark McGuigan <
> Mark.McGuigan at 360globalnet.com> wrote:
>
> Hi,
>
> Apologies if this email is incorrectly posted.
>
> I'm using the newly released Keycloak 4 and I've been able to successfully
> get an access token for a user from an access code posted back to my
> application. This doesn't contain any permissions on the token (Rightly so,
> only roles)
> I'm now trying to get an RPT with permissions from the of client
> application that reflect what the User is allowed to do.
>
> My request looks something like:
> POST /auth/realms/MyRealm/protocol/openid-connect/token HTTP/1.1
> Host: localhost:8080
> Authorization: Bearer eyJhbGciOiJSUzI1NiIsInR5c ...
> Content-Type: application/x-www-form-urlencoded
> Cache-Control: no-cache
> Postman-Token: 4054feaf-a9d7-48e2-99b6-eabc86bf8da5
>
> grant_type=urn%3Aietf%3Aparams%3Aoauth%3Agrant-type%3Auma-ticket&audience=
> MyClient&permission=Default+Resource
>
> Where the Bearer is the generated access_token. However I'me getting a
> response of :
>
> 500 Internal Server Error
> {
>     "error": "server_error",
>     "error_description": "Unexpected error while evaluating permissions"
> }
>
> And a stack trace of:
>
> Unexpected error while evaluating permissions: java.lang.RuntimeException:
> Error while reading attributes from security token.
>         at org.keycloak.authorization.common.KeycloakIdentity.<init>
> (KeycloakIdentity.java:139)
>         at org.keycloak.authorization.common.KeycloakIdentity.<init>
> (KeycloakIdentity.java:68)
>         at org.keycloak.authorization.authorization.
> AuthorizationTokenService.lambda$static$1(AuthorizationTokenService.
> java:124)
>         at org.keycloak.authorization.authorization.
> AuthorizationTokenService.createEvaluationContext(
> AuthorizationTokenService.java:311)
>         at org.keycloak.authorization.authorization.
> AuthorizationTokenService.authorize(AuthorizationTokenService.java:161)
>         at org.keycloak.protocol.oidc.endpoints.TokenEndpoint.
> permissionGrant(TokenEndpoint.java:1124)
>         at org.keycloak.protocol.oidc.endpoints.TokenEndpoint.
> processGrantRequest(TokenEndpoint.java:190)
> .....
> Caused by: java.lang.NullPointerException
>         at org.keycloak.services.util.DefaultClientSessionContext.
> fromClientSessionScopeParameter(DefaultClientSessionContext.java:64)
>         at org.keycloak.authorization.common.KeycloakIdentity.<init>
> (KeycloakIdentity.java:123)
>
> Any Ideas what I may be doing wrong? Any help appreciated.
>
> Regards,
>
> Mark
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