Keycloak cannot verify user information with a valid token - jwt

Question

I'm setting up Keycloak as an authentication server https://github.com/keycloak/keycloak/releases/download/12.0.0/keycloak-12.0.0.zip
Java 11
Documentation: https://github.com/keycloak/keycloak-documentation/blob/master/securing_apps/topics/oidc/oidc-generic.adoc
I can generate the access_token via /realms/{realm-name}/protocol/openid-connect/token
but I cannot call the userinfo endpoint /realms/{realm-name}/protocol/openid-connect/userinfo using a valid access_token which I get from the first API.
POST http://127.0.0.1:8080/auth/realms/test/protocol/openid-connect/token
{
client_secret: ...,
grant_type: ...,
client_id: ...,
}
response
{
"access_token": "eyJhbGciOiJSUzI1NiIsInR5cCIgOiAiSldUIiwia2lkIiA6ICIxOE..."
"expires_in": 3600,
"refresh_expires_in": 0,
"token_type": "Bearer",
"not-before-policy": 0,
"scope": "create"
}
But here is the result when I call the get user info API
GET http://127.0.0.1:8080/auth/realms/test/protocol/openid-connect/userinfo
Header: Bearer ${access_token}
Are there any suggestions?
Thank you
Post man test
Keycloak server's log is same
Keycloak bug
I think this is an issue on KC 12.0
When I use KC 11.0.3, above APIs work fine
https://github.com/keycloak/keycloak-community/issues/224
The Jira story:
https://issues.redhat.com/browse/KEYCLOAK-17217

Answer 1

Make sure you are calling the endpoint as follows.
First getting the token:
curl -d "client_id=$YOUR_CLIENT_ID" \
-d "client_secret=$YOUR_CLIENT_SECRET" \
-d "grant_type=client_credentials" \
http://127.0.0.1:8080/auth/realms/test/protocol/openid-connect/token)
Extract from the JSON response the access_token field (e.g., jq -r .access_token)
Then call the userinfo as follows:
curl -X GET http://127.0.0.1:8080/auth/realms/test/protocol/openid-connect/userinfo \
-H "Content-Type: application/json" \
-H "Authorization: Bearer $ACCESS_TOKEN"
With Postman:
For a setup with Realm Name = "test", client_id = "test", client_secret = "63b61af0-5a99-41d7-8f9b-4e3059b8b9ab" and using client_credentials grant_type.
Getting the token:
and getting the userinfo:
EDIT
The approach below works with Keycloak 10.0.x, and 11.0.x, but gets exactly the same issues as OP's for the version Keycloak 12.0.x (including the latest release Keycloak 12.0.2).
This seams to be regression added with Keycloak 12.0.0 follow this issue for update information.