Files
mimic-big/backend/src/mimic/rbac/decorators.py
knacky 7f4ad85a68 feat(backend): add local auth + group-based RBAC matching F11 (B0.6)
- Permission enum + GroupName enum + GROUP_PERMISSIONS mapping mirror
  the F11 matrix in code (verifiable against the spec table in tests).
- @require_perm decorator: 401 on anonymous, 403 on missing permission,
  passes through otherwise. Pure-function user_has() for unit-testing.
- AuthUser (Flask-Login wrapper) resolves the permission set from a
  User's groups; load_user is the Flask-Login user_loader.
- bcrypt password hashing helpers (12 rounds by default, configurable).
- SOC opaque token (D-006): secrets.token_urlsafe(32), bcrypt-hashed at
  rest, plain value returned once at creation and never re-displayable.
- Group-based RBAC from day one (D-003) — Keycloak OIDC in v2 maps onto
  the same group model.
2026-05-21 20:36:03 +02:00

43 lines
1.2 KiB
Python

"""`@require_perm` Flask decorator (group-based RBAC)."""
from __future__ import annotations
from collections.abc import Callable
from functools import wraps
from typing import TYPE_CHECKING, ParamSpec, TypeVar
from flask import abort
from flask_login import current_user
from mimic.rbac.matrix import Permission
if TYPE_CHECKING:
pass
P = ParamSpec("P")
R = TypeVar("R")
def require_perm(perm: Permission) -> Callable[[Callable[P, R]], Callable[P, R]]:
"""Reject the request with 401/403 unless the user holds `perm`."""
def _decorate(view: Callable[P, R]) -> Callable[P, R]:
@wraps(view)
def _wrapped(*args: P.args, **kwargs: P.kwargs) -> R:
user = current_user
if not getattr(user, "is_authenticated", False):
abort(401)
permissions: frozenset[Permission] = getattr(user, "permissions", frozenset())
if perm not in permissions:
abort(403)
return view(*args, **kwargs)
return _wrapped # type: ignore[return-value]
return _decorate
def user_has(perm: Permission, permissions: frozenset[Permission]) -> bool:
"""Pure helper, easier to unit-test than the decorator."""
return perm in permissions