Getting error function Joken.token/1 is undefined or private

Questions / Help
,
1

I am getting the JWT Token from Google/Gmail Oath and now, I want to decode it using the Joken library. Following are the step I have done-

1- Added the code in mix.exs

{:joken, "~> 2.0"},

2- Added the code in config/dev.exs

config :joken, default_signer: "secret"

3- In new file, make a module

defmodule Apollo.Token do
 use Joken.Config

 def decode(token) do
   token
   |> Joken.token()
   |> Joken.peek()
 end
end,

4- Now, calling module from this like -
struct = Apollo.Token.decode(token)

Due to the 4th step, I am getting error that is Gettting error function Joken.token/1 is undefined or private. Your response will be highly appreciable.

2

did you run mix deps.get after step 1?

3

Also I can’t find token/1 function in module Joken in docs

4

It was available in 1.0… it seems as if someone mixed current and outdated instructions.

5

The code in your decode function appears to be written for Joken 1.x - Joken.token exists there.

The documentation now warns against using peek_* functions in most cases, as they don’t validate the signature. OTOH, the Google docs for OpenID Connect suggest it may not be a hard requirement.

1 Like
6

ok, can you please guide me- how i can do the same in version 2.0

7

Currently, I am using version 2.0. How can I do with this version?

8

Can you show what you’ve tried so far within the Joken 2.0 docs?

9 
signer = Joken.Signer.create("HS256", "secret")

{:ok, token_with_default_claims} = MyApp.Token.generate_and_sign(%{}, signer)

extra_claims = %{"user_id" => "some_id"}
token_with_default_plus_custom_claims = MyApp.Token.generate_and_sign!(extra_claims, signer)

{:ok, claims} = MyApp.Token.verify_and_validate(token, signer)

I have used this code and this is running fine. here first i create signer and then used that signer to verify the token, but when i used this signer with id_token(received from Gmail OAuth) this returns me an error. Why i need signer and all because on online platforms(https://www.jsonwebtoken.io/) i am getting json by just pasting the id_token(how i can do the same using joken)

1 Like
10

To works with JWT and Google,you need to use RS256 instead H256.

signer = Joken.Signer.create("RS256", %{"pem" => id_token})