[keycloak-user] Keycloak adapter with policies returns bad request

Thu Dec 8 07:05:23 EST 2016

On 12/8/2016 7:06:44 AM, Richard van Duijn <rjvduijn at gmail.com> wrote:
Hi Pedro,
Thank you for the reply.

Fist I'll answer your questions, then I'll clarify my setup a bit more. Please find attached my realm config file as well.

* The realm name was a typo. In the meantime I've reconfigured my realm to ensure the '.' char was not messing up. Turned out not to be the case.

* I'm not able to retrieve an AT from keycloak for the backend-client (which is set to bearer-only). With the given Postman request I just get the 400 bad request error and accompanying message.
Pedro Igor: I was able to get an AT after importing your realm and sending the same postman request. Now I'm confused :) The client is backend-client, correct ?

* I've followed the getting started guid up to securing the jboss servlet. I've stopped there as I wanted to use a keycloak distribution in combination with a PlayFramework application (for which there is no adapter available yet). 
I've followed the steps from this [http://bandrzejczak.com/blog/2015/11/22/single-sign-on-with-keycloak-in-a-sigle-page-application-part-1-slash-2-angular-dot-js/] post to get the bearerToken approach working. Using the AdapterRSATokenVerifier class I was able to verify the bearerToken received from the javascript frontend. What I basically have is a filter that intercepts the frontend requests, picks up the bearerToken and checks it's validity. If valid the resource is accessible otherwise the user receives an error.

The next step was to include policies in the setup. Setting up the adapter for the playFramework was a bit difficult as there is no real documentation on that subject, only example implementations like the ones for spring security and jetty. But before getting to the complex logic I've added the policy-enforcer: {} line in the keycloak.json config file for the backend-client. This json is then loaded and used in KeycloakDeploymentBuilder.build(keycloakConfig). This is the point where it fails, as the config contains the policy-enforcer line, the PolicyEnforcer class is initialized, which in turn attempts to retrieve the AT from keycloak. 

Is there some flaw in my reasoning?

* The javascript frontend authenticates itself using the keycloak.js adapter. It adds the accessToken to the Authorization header for the rest-client to pickup

* The rest client (my backend-client) verifies the bearerToken using the AdapterRSATokenVerifier
* Then the rest client checks the authorization using the folliwing lines of code:

final PolicyEnforcer policyEnforcer = keycloakDeployment.getPolicyEnforcer();
BearerTokenPolicyEnforcer bearerTokenPolicyEnforcer = new BearerTokenPolicyEnforcer(policyEnforcer);

final AuthorizationContext authorizationContext = bearerTokenPolicyEnforcer.authorize(facade);
Pedro Igor: It looks correct. Although it seems you are not even reaching the line above where permissions are actually enforced. Besides, make sure you have all bearer token validations in place based on other adapters we have.

You are almost there. You just need to figure out why you can't obtain an AT from the server even if using postman, curl, etc. I think that if you solve this, you will get everything working (or hit some new issue after this one :)).

Hope this clarifies it a bit. I've attached my realm configuration json file. By the way I'm using keycloak 2.4.0-Final. 

Many many thanks for your help!

If this approach is valid I'm hapy to contribute my code to the community for others to work with. 
/Richard

Op do 8 dec. 2016 om 01:13 schreef Pedro Igor <psilva at redhat.com [mailto:psilva at redhat.com]>:

Hi Richard,

In your first message, it seems the token endpoint is http://127.0.0.1:8080/auth/realms/local.development/protocol/openid-connect/token.Here [http://127.0.0.1:8080/auth/realms/local.development/protocol/openid-connect/token.Here] you are using a realm "local.development".

In your last message with the postman request, you are using a token endpoint like this /auth/realms/development/protocol/openid-connect/token. Where the realm is "development", the same you have used in keycloak.json.

Would that be a misconfiguration or just a typo ?

Besides, what happens when you send that postman request to the server ? Are you able to get a AT ?

This is pretty much what the enforcer does during initialization, obtain a AT before querying the Protection API for protected resources. And is what your stack trace shows.

If you are not able to obtain a token using the postman request, it probably means you have something wrong with your realm/client configuration on the server.

Last question, are you able to run any of our authorization examples ? Or even successfully follow our Getting Started guide ?

Thanks.
Pedro Igor
On 12/7/2016 12:05:10 PM, Richard van Duijn <rjvduijn at gmail.com [mailto:rjvduijn at gmail.com]> wrote:
Forgot to include the postman request.. here it is:

POST /auth/realms/development/protocol/openid-connect/token HTTP/1.1
Host: 127.0.0.1:8080 [http://127.0.0.1:8080]
Authorization: Basic YmFja2VuZC1jbGllbnQ6NmNlNzE4YWQtMmFiMS00MmZmLWJmMDEtMzVhMDNlYWIzYWVl
Cache-Control: no-cache
Content-Type: application/x-www-form-urlencoded

grant_type=client_credentials  

/Richard

Op wo 7 dec. 2016 om 15:00 schreef Richard van Duijn <rjvduijn at gmail.com [mailto:rjvduijn at gmail.com]>:

Somehow I do not get any logs in keycloak server.log. I've attempted to change the loglevel in standalone.xml to TRACE, but to no avail. Maybe you can give me a pointer to which logger I should change to see the correct logs show up.

Besides that I've done some debugging using Postman as well. Using the following request I get the message:
{
    "error": "invalid_client",
    "error_description": "Bearer-only not allowed"
} 

This is weird to me as the keycloak.json file states that I am connecting to a bearer-only client.

Hope this helps to clarify it for you.
My keycloak.json configuration file looks like this:

{
  "realm": "development",
  "bearer-only": true,
  "auth-server-url": "http://127.0.0.1:8080/auth [http://127.0.0.1:8080/auth]",
  "ssl-required": "external",
  "resource": "backend-client",
  "use-resource-role-mappings": true,
  "credentials": {
    "secret": "SECRETHERE"
  },
  "policy-enforcer": {}
}

Hope this helps to clarify some of your questions.
/Richard

Op wo 7 dec. 2016 om 12:47 schreef Pedro Igor <psilva at redhat.com [mailto:psilva at redhat.com]>:

Do you get anything in server logs ? It may be related with invalid client credentials.
On 12/6/2016 12:41:38 PM, Richard van Duijn <rjvduijn at gmail.com [mailto:rjvduijn at gmail.com]> wrote:
I'm creating a POC application using playframework and angular. The
frontend will be protected using the keycloak javascript adapter and the
backend rest services will be a bearer-only application.

Without the policies turned on in the keycloak.json everything goes well.
But when I turn the policies by adding "policy-enforcer": { } on for the
rest services, I get an 400 Bad Request response from the Keycloak server
during initialization.
After some debugging I noticed it had to do with the initialization of the
PolicyEnforcer which attempts to call the following server keycloak
endpoint:
http://127.0.0.1:8080/auth/realms/local.development/protocol/openid-connect/token [http://127.0.0.1:8080/auth/realms/local.development/protocol/openid-connect/token]

Below you will find the stacktrace and request and response objects.
Hope someone can point me in the right direction. For instance how to
configure keycloak logging to get some more details on what the reason for
the 400 bad request is.
Many many thanks!
/Richard

*Stacktrace*:

at
org.keycloak.authorization.client.util.HttpMethod.execute(HttpMethod.java:92)
at
org.keycloak.authorization.client.util.HttpMethodResponse$2.execute(HttpMethodResponse.java:48)
at
org.keycloak.authorization.client.AuthzClient.obtainAccessToken(AuthzClient.java:112)
at
org.keycloak.authorization.client.AuthzClient.protection(AuthzClient.java:91)
at

org.keycloak.adapters.authorization.PolicyEnforcer.(PolicyEnforcer.java:57)

at
org.keycloak.adapters.KeycloakDeploymentBuilder.internalBuild(KeycloakDeploymentBuilder.java:126)
at
org.keycloak.adapters.KeycloakDeploymentBuilder.build(KeycloakDeploymentBuilder.java:135)
at
security.KeycloakSecurityModule.configure(KeycloakSecurityModule.java:53)
at com.google.inject.AbstractModule.configure(AbstractModule.java:62)
... many google guice calls ...
at
play.core.server.DevServerStart$$anonfun$mainDev$1$$anon$1$$anonfun$get$1.apply(DevServerStart.scala:129)
at
play.core.server.DevServerStart$$anonfun$mainDev$1$$anon$1$$anonfun$get$1.apply(DevServerStart.scala:121)

*Request object*:

builder = {RequestBuilder at 12557}
method = "POST"
charset = {UTF_8 at 12563} "UTF-8"
version = null
uri = {URI at 12564} "
http://127.0.0.1:8080/auth/realms/local.development/protocol/openid-connect/token [http://127.0.0.1:8080/auth/realms/local.development/protocol/openid-connect/token]
"
headergroup = {HeaderGroup at 12565} "[Authorization: Basic
YmFja2VuZC1jbGllbnQ6NmNlNzE4YWQtMmFiMS00MmZmLWJmMDEtMzVhMDNlYWIzYWVl]"
entity = null
parameters = {LinkedList at 12566} size = 1
0 = {BasicNameValuePair at 12576} "grant_type=client_credentials"
config = null

*Response object*:

HTTP/1.1 400 Bad Request [Connection: keep-alive, X-Powered-By: Undertow/1,
Server: WildFly/10, Content-Type: application/json, Content-Length: 72,
Date: Tue, 06 Dec 2016 12:24:28 GMT]
org.apache.http.conn.BasicManagedEntity at 1f8d1780
response = {$Proxy16 at 12554} "HTTP/1.1 400 Bad Request [Connection:
keep-alive, X-Powered-By: Undertow/1, Server: WildFly/10, Content-Type:
application/json, Content-Length: 72, Date: Tue, 06 Dec 2016 12:24:28 GMT]
org.apache.http.conn.BasicManagedEntity at 1f8d1780"
h = {CloseableHttpResponseProxy at 12583}
original = {BasicHttpResponse at 12584} "HTTP/1.1 400 Bad Request
[Connection: keep-alive, X-Powered-By: Undertow/1, Server: WildFly/10,
Content-Type: application/json, Content-Length: 72, Date: Tue, 06 Dec 2016
12:24:28 GMT] org.apache.http.conn.BasicManagedEntity at 1f8d1780"
statusline = {BasicStatusLine at 12556} "HTTP/1.1 400 Bad Request"
ver = {HttpVersion at 12586} "HTTP/1.1"
code = 400
reasonPhrase = "Bad Request"
entity = {BasicManagedEntity at 12555}
reasonCatalog = {EnglishReasonPhraseCatalog at 12588}
locale = {Locale at 12589} "en_US"
headergroup = {HeaderGroup at 12590} "[Connection: keep-alive,
X-Powered-By: Undertow/1, Server: WildFly/10, Content-Type:
application/json, Content-Length: 72, Date: Tue, 06 Dec 2016 12:24:28 GMT]"
params = {ClientParamsStack at 12591}

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