update

AzA march 2026 - Kopie (18)/workforce_planner/api/auth.py

@@ -0,0 +1,66 @@
+# -*- coding: utf-8 -*-
+"""Einfache Token-basierte Authentifizierung (JWT)."""
+
+import datetime
+from typing import Optional
+
+import bcrypt
+from fastapi import Depends, HTTPException, status
+from fastapi.security import HTTPBearer, HTTPAuthorizationCredentials
+from jose import jwt, JWTError
+from sqlalchemy.orm import Session
+
+from ..config import SECRET_KEY, ACCESS_TOKEN_EXPIRE_MINUTES
+from ..database import get_db
+from ..core.models import Employee
+from ..core.enums import EmployeeRole
+
+_security = HTTPBearer(auto_error=False)
+
+ALGORITHM = "HS256"
+
+
+def hash_password(password: str) -> str:
+    return bcrypt.hashpw(password.encode("utf-8"), bcrypt.gensalt()).decode("utf-8")
+
+
+def verify_password(plain: str, hashed: str) -> bool:
+    return bcrypt.checkpw(plain.encode("utf-8"), hashed.encode("utf-8"))
+
+
+def create_access_token(employee_id: str, role: str) -> str:
+    expire = datetime.datetime.utcnow() + datetime.timedelta(minutes=ACCESS_TOKEN_EXPIRE_MINUTES)
+    return jwt.encode(
+        {"sub": employee_id, "role": role, "exp": expire},
+        SECRET_KEY,
+        algorithm=ALGORITHM,
+    )
+
+
+def get_current_user(
+    creds: Optional[HTTPAuthorizationCredentials] = Depends(_security),
+    db: Session = Depends(get_db),
+) -> Employee:
+    if not creds:
+        raise HTTPException(status.HTTP_401_UNAUTHORIZED, "Token fehlt")
+    try:
+        payload = jwt.decode(creds.credentials, SECRET_KEY, algorithms=[ALGORITHM])
+        emp_id = payload.get("sub")
+        if not emp_id:
+            raise HTTPException(status.HTTP_401_UNAUTHORIZED, "Ungültiger Token")
+    except JWTError:
+        raise HTTPException(status.HTTP_401_UNAUTHORIZED, "Ungültiger Token")
+
+    emp = db.query(Employee).filter(Employee.id == emp_id).first()
+    if not emp or not emp.is_active:
+        raise HTTPException(status.HTTP_401_UNAUTHORIZED, "Benutzer nicht gefunden")
+    return emp
+
+
+def require_role(*roles: EmployeeRole):
+    """Dependency-Factory: erlaubt nur bestimmte Rollen."""
+    def _check(user: Employee = Depends(get_current_user)):
+        if user.role not in roles:
+            raise HTTPException(status.HTTP_403_FORBIDDEN, "Keine Berechtigung")
+        return user
+    return _check