mirror of
https://github.com/TronoSfera/backup_service.git
synced 2026-05-18 10:03:32 +03:00
96 lines
No EOL
3 KiB
Python
96 lines
No EOL
3 KiB
Python
"""Authentication utilities for the backup service.
|
|
|
|
This module implements password hashing, JSON Web Token (JWT) generation and
|
|
verification, and FastAPI dependencies for authenticating API calls. Users
|
|
authenticate via the ``/api/login`` endpoint by providing their username and
|
|
password; upon successful authentication a signed JWT is returned. The JWT
|
|
must be included in the ``Authorization: Bearer <token>`` header for
|
|
subsequent requests.
|
|
|
|
The JWT contains the user's ID and role (admin flag). Token expiration is
|
|
configurable via the ``ACCESS_TOKEN_EXPIRE_MINUTES`` environment variable.
|
|
"""
|
|
|
|
from __future__ import annotations
|
|
|
|
import os
|
|
import datetime
|
|
from typing import Optional
|
|
|
|
from jose import JWTError, jwt
|
|
from passlib.context import CryptContext
|
|
from fastapi import Depends, HTTPException, status
|
|
from fastapi.security import OAuth2PasswordBearer
|
|
from sqlalchemy.orm import Session
|
|
|
|
from . import models
|
|
from .database import get_db
|
|
|
|
|
|
# Configuration
|
|
SECRET_KEY = os.getenv("SECRET_KEY", "CHANGE_ME")
|
|
ALGORITHM = "HS256"
|
|
ACCESS_TOKEN_EXPIRE_MINUTES = int(os.getenv("ACCESS_TOKEN_EXPIRE_MINUTES", "60"))
|
|
|
|
|
|
# Password hashing context
|
|
pwd_context = CryptContext(schemes=["bcrypt"], deprecated="auto")
|
|
|
|
oauth2_scheme = OAuth2PasswordBearer(tokenUrl="/api/login")
|
|
|
|
|
|
def hash_password(password: str) -> str:
|
|
return pwd_context.hash(password)
|
|
|
|
|
|
def verify_password(plain_password: str, hashed_password: str) -> bool:
|
|
return pwd_context.verify(plain_password, hashed_password)
|
|
|
|
|
|
def create_access_token(data: dict, expires_delta: Optional[datetime.timedelta] = None) -> str:
|
|
to_encode = data.copy()
|
|
expire = datetime.datetime.utcnow() + (
|
|
expires_delta or datetime.timedelta(minutes=ACCESS_TOKEN_EXPIRE_MINUTES)
|
|
)
|
|
to_encode.update({"exp": expire})
|
|
encoded_jwt = jwt.encode(to_encode, SECRET_KEY, algorithm=ALGORITHM)
|
|
return encoded_jwt
|
|
|
|
|
|
async def get_current_user(
|
|
token: str = Depends(oauth2_scheme), db: Session = Depends(get_db)
|
|
) -> models.User:
|
|
"""Retrieve the current user from a JWT token."""
|
|
credentials_exception = HTTPException(
|
|
status_code=status.HTTP_401_UNAUTHORIZED,
|
|
detail="Could not validate credentials",
|
|
headers={"WWW-Authenticate": "Bearer"},
|
|
)
|
|
try:
|
|
payload = jwt.decode(token, SECRET_KEY, algorithms=[ALGORITHM])
|
|
user_id: int | None = payload.get("sub")
|
|
if user_id is None:
|
|
raise credentials_exception
|
|
except JWTError as e:
|
|
raise credentials_exception from e
|
|
user = db.query(models.User).filter(models.User.id == user_id).first()
|
|
if user is None:
|
|
raise credentials_exception
|
|
return user
|
|
|
|
|
|
async def get_current_active_user(
|
|
current_user: models.User = Depends(get_current_user),
|
|
) -> models.User:
|
|
return current_user
|
|
|
|
|
|
async def get_current_admin(
|
|
current_user: models.User = Depends(get_current_user),
|
|
) -> models.User:
|
|
if not current_user.is_admin:
|
|
raise HTTPException(
|
|
status_code=status.HTTP_403_FORBIDDEN,
|
|
detail="Not enough privileges",
|
|
)
|
|
return current_user |