Summary and context

The external JWT validator service successfully receives the POST request and returns 200 OK but RIG always returns "Invalid Signature".

How to reproduce

When I run RIG with these settings:

• External service is running on port 3000 on host machine and is accessible from docker containers.

• External service immediately returns 200 OK for testing and doesn't actually validates the JWT.

• RIG Config values:

SUBSCRIPTION_CHECK=http://host.docker.internal:3000

..and set up clients and services like this:

• Initiate Websocket connection:

$ wscat -c ws://localhost:4000/_rig/v1/connection/ws

• Subscription request:

$ curl -X PUT -H "Content-Type: application/json" -d '{"subscriptions":[{"eventType":"position","oneOf":[{"userType":"admin"}]}]}' -H "Authorization: Bearer jwt_token" "http://localhost:4000/_rig/v1/connection/ws/0B7ilUe9imppbOep5E9Gw_KD8ZR7Jal4HK2ZyG0cZXO2VBwxAxT8ZIUGA_YORriC7I3nppuaNfv48PQzbtQ=/subscriptions"

..I see the following error and/or log output:

• Subscription response:

cannot accept subscription request: invalid authorization header: could not decode JWT: Invalid signature

• JWT service received request from RIG:

{
method: 'POST',
url: '/',
header: {
authorization: 'Bearer jwt_token',
host: 'host.docker.internal:3000',
'user-agent': 'hackney/1.16.0',
'content-type': 'application/json',
'content-length': '75'
}
}

• RIG logs:

rig-dev | 16:15:06.145 module=Phoenix.Logger request_id=Fn_mwLBz4wK9hIAAAABB [debug] Processing with RigInboundGatewayWeb.V1.SubscriptionController.set_subscriptions/2
rig-dev | Parameters: [UNFETCHED]
rig-dev | Pipelines: [:api]
rig-dev | 16:15:06.145 module=Plug.Logger request_id=Fn_mwLBz4wK9hIAAAABB [debug] PUT /_rig/v1/connection/ws/0B7ilUe9imppbOep5E9Gw_KD8ZR7Jal4HK2ZyG0cZXO2VBwxAxT8ZIUGA_YORriC7I3nppuaNfv48PQzbtQ=/subscriptions
rig-dev | 16:15:06.149 module=RigInboundGatewayWeb.V1.SubscriptionController request_id=Fn_mwLBz4wK9hIAAAABB [warn] failed to associate to session: ["%RIG.JWT.DecodeError{cause: "Invalid signature"}"]

..but I really expected this:

• Successful subscription:

{"subscriptions":[{"eventType":"position","oneOf":[{"userType":"admin"}]....

Versions (please complete the following information):**

• Host OS: Docker on MacOS[MacBook Pro (16-inch, 2019)]
• Frontend: curl
• RIG version as shown on startup: Reactive Interaction Gateway 3.0.0-alpha.1 [rig@127.0.0.1, ERTS 11.1.8, OTP 23]