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simple_module_auth

Pluggable authentication core for simple_module apps. Owns the stable public contracts every other module imports — UserContext, the AuthProvider protocol, the PrincipalResolver chain, and the get_current_user / CurrentUser / require_permission dependencies — plus the AuthMiddleware that resolves the current principal on every request.

Heads up: for most apps you don't install this directly — an auth-provider module (simple_module_users for email+password, simple_module_keycloak for OIDC) pulls it in and registers itself on app.state.auth.auth_provider.

Install

pip install simple_module_auth

What it provides

  • UserContext — the request-scoped principal (id, name, email, roles).
  • AuthProvider protocol — the swappable-backend contract (resolve_user, get_login_url, get_logout_url, get_public_paths, is_bearer_request); exactly one provider module registers an implementation on app.state.auth.auth_provider.
  • PrincipalResolver chain — async (Request) -> UserContext | None callables apps append to app.state.auth.principal_resolvers (e.g. PAT/bearer-token or API-key auth), consulted after the session path.
  • AuthMiddleware — delegates to the provider + resolver chain on every request and populates the request principal.
  • get_current_user / CurrentUser dependency and the require_permission(*permissions) dependency factory.
  • Anonymous-access is declared via the framework's method-aware register_public_routes hook (with the SM_AUTH_PUBLIC_PATHS host-level escape hatch).

Usage

from fastapi import APIRouter

from auth.deps import CurrentUser

router = APIRouter()


@router.get("/me")
async def me(user: CurrentUser):
    return {"user_id": user.id, "email": user.email}

Routes that need a specific permission use the require_permission(...) dependency factory:

from fastapi import Depends

from auth.deps import require_permission


@router.post("/", dependencies=[Depends(require_permission("products.create"))])
async def create_product(): ...

Depends on

  • simple_module_core, simple_module_db
  • itsdangerous

License

MIT — see LICENSE.

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