sk-simple-token-security

JWT security for SignalK Node Server

Installation

Make sure you have the latest node server and use the App Store to install the signalk-jwt-security-config plugin.

Security

To enabled security on node server, add an authentication section to your settings .json file.

Here is an example:

  "security": {
    "strategy": "sk-simple-token-security",
    "jwtSecretKey": "tyPaYnCtpZLZjNXyLRKnspZHQyLGZUgkYvtwE7quwZDaZmAnqpKntRqDjTciVazV",
  }

For a full example settings file see example-node-server-settings.json

User Types

admin - an admin can do anything incuding installing plugins, configuring plugins, restarting the server, etc. Including anything that the readonly and readwrite users can do.
readwrite - a readwrite user can use web apps, read from the rest and ws api's, and post to the rest api.
readonly - a readlony user can read from the rest, ws and /plugin apis

JWT Usage

When JWT is turned on, all requests require a valid token to be present.

JWT requires a secret key, which is the jwtSecretKey in the example above. This can be any string, but it's recommended to use a good password generator that can generate a long string.

JWT tokens should have an expriation time, this is set using the jwtExpiration setting above. This defaults to 1 hour.

Getting a token

To get a token (which will expire), send a PUT request to /signalk/v1/login. This should contain a json object with username and password.

Example using curl:

curl -v -H 'Content-Type: application/json' -X PUT -d '{ "username": "admin", "password": "password"}' http://localhost:3000/signalk/v1/login

This returns a json object which includes the token:

{"token":"eyJhbGciOiJIUzI1NiIsInR5cCI6IkpXVCJ9.eyJpZCI6ImFkbWluIiwiaWF0IjoxNDk4MTg1MjAwfQ.c5hR66gm_GdE1c8eukUCxNhv-SEApCpMo3JCdUqEDEk"}

Using the JWT token for REST requests

All REST requests should then include the standard Authorization HTTP header with all requests. The value of the header should be JWT a space and then the token.

Example using curl:

curl -v -H 'Authorization: JWT eyJhbGciOiJIUzI1NiIsInR5cCI6IkpXVCJ9.eyJpZCI6ImFkbWluIiwiaWF0IjoxNDk4MTYwMzEwfQ.7xvxLUechuztChRvGaYq_bpjYvu4NMpZe-uZqeAQV5c' http://localhost:3000/signalk/v1/api/vessels/self

Using the JWT token for streaming requests

These requests can use the same method as REST requests above or include the token as a query parameter.

Example using wscat:

wscat -c "ws://localhost:3000/signalk/v1/stream?subscribe=all&token=eyJhbGciOiJIUzI1NiIsInR5cCI6IkpXVCJ9.eyJpZCI6ImFkbWluIiwiaWF0IjoxNDk4MTYwMzEwfQ.7xvxLUechuztChRvGaYq_bpjYvu4NMpZe-uZqeAQV5c"