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FastAPI OAuth2 Client

WSO2 Identity Server compatible

This project is a proof of concept how to implement Authorization Code grant type with WSO2 Identity Server. With minor adjustments, or even without changes, it can talk with other OAuth2 servers as well.

As a result, it'll get JWT token from WSO2 Identity Server, then validate it by invoking public JWKS endpoint. The JSON Web Key Set (JWKS) is a set of keys containing the public keys used to verify any JSON Web Token (JWT) issued by the Authorization Server and signed using the RS256 signing algorithm.

How to use it

  • Clone the repo
  • run cp .env.example .env
  • edit .env and fill up your own parameters
  • run pip3 install -r requirements.txt
  • run uvicorn main:app --port 3000 --reload
  • open http://localhost:3000/login in web browser
  • you should be redirected to the login page
  • after a successful login, you should get back the token response in JSON format, e.g.:
{
    "sub": "[email protected]",
    "aut": "APPLICATION",
    "iss": "https://identity.diplomacy.edu/oauth2/token",
    "given_name": "Dusan",
    "client_id": "xxx",
    "aud": "xxx",
    "nbf": 1679487318,
    "azp": "xxx",
    "scope": "profile",
    "exp": 1679490918,
    "iat": 1679487318,
    "family_name": "Devic",
    "jti": "d8760edc-8069-430c-a732-6c2b77716a29",
    "username": "[email protected]"
}

Returned token might be a bit different as it depends on the WSO2 Identity Server Service Provider configuration. One should pre-configure it in WSO2 Identity Server in order to get configuration parameters (client id, secret, callback url etc).

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