134 lines
4.4 KiB
Python
134 lines
4.4 KiB
Python
"""
|
|
Authentication module for backend API.
|
|
Handles JWT-based authentication, token generation, and user context.
|
|
"""
|
|
|
|
from datetime import datetime, timedelta, timezone
|
|
from typing import Optional, Dict, Any, Tuple
|
|
from fastapi import Depends, HTTPException, status, Request
|
|
from fastapi.security import OAuth2PasswordBearer
|
|
from jose import JWTError, jwt
|
|
import logging
|
|
from slowapi import Limiter
|
|
from slowapi.util import get_remote_address
|
|
|
|
from modules.shared.configuration import APP_CONFIG
|
|
from modules.shared.timezoneUtils import get_utc_now, get_utc_timestamp
|
|
from modules.interfaces.interfaceAppObjects import getRootInterface
|
|
from modules.interfaces.interfaceAppModel import User
|
|
|
|
# Get Config Data
|
|
SECRET_KEY = APP_CONFIG.get("APP_JWT_SECRET_SECRET")
|
|
ALGORITHM = APP_CONFIG.get("Auth_ALGORITHM")
|
|
ACCESS_TOKEN_EXPIRE_MINUTES = int(APP_CONFIG.get("APP_TOKEN_EXPIRY"))
|
|
REFRESH_TOKEN_EXPIRE_DAYS = int(APP_CONFIG.get("APP_REFRESH_TOKEN_EXPIRY", "7"))
|
|
|
|
# OAuth2 Setup
|
|
oauth2Scheme = OAuth2PasswordBearer(tokenUrl="token")
|
|
|
|
# Rate Limiter
|
|
limiter = Limiter(key_func=get_remote_address)
|
|
|
|
# Logger
|
|
logger = logging.getLogger(__name__)
|
|
|
|
def createAccessToken(data: dict, expiresDelta: Optional[timedelta] = None) -> Tuple[str, datetime]:
|
|
"""
|
|
Creates a JWT Access Token.
|
|
|
|
Args:
|
|
data: Data to encode (usually user ID or username)
|
|
expiresDelta: Validity duration of the token (optional)
|
|
|
|
Returns:
|
|
Tuple of (JWT Token as string, expiration datetime)
|
|
"""
|
|
toEncode = data.copy()
|
|
|
|
if expiresDelta:
|
|
expire = get_utc_now() + expiresDelta
|
|
else:
|
|
expire = get_utc_now() + timedelta(minutes=ACCESS_TOKEN_EXPIRE_MINUTES)
|
|
|
|
toEncode.update({"exp": expire})
|
|
encodedJwt = jwt.encode(toEncode, SECRET_KEY, algorithm=ALGORITHM)
|
|
|
|
return encodedJwt, expire
|
|
|
|
def _getUserBase(token: str = Depends(oauth2Scheme)) -> User:
|
|
"""
|
|
Extracts and validates the current user from the JWT token.
|
|
|
|
Args:
|
|
token: JWT Token from the Authorization header
|
|
|
|
Returns:
|
|
User model instance
|
|
|
|
Raises:
|
|
HTTPException: For invalid token or user
|
|
"""
|
|
credentialsException = HTTPException(
|
|
status_code=status.HTTP_401_UNAUTHORIZED,
|
|
detail="Invalid authentication credentials",
|
|
headers={"WWW-Authenticate": "Bearer"},
|
|
)
|
|
|
|
try:
|
|
# Decode token
|
|
payload = jwt.decode(token, SECRET_KEY, algorithms=[ALGORITHM])
|
|
|
|
# Extract username from token
|
|
username: str = payload.get("sub")
|
|
if username is None:
|
|
raise credentialsException
|
|
|
|
# Extract mandate ID and user ID from token
|
|
mandateId: str = payload.get("mandateId")
|
|
userId: str = payload.get("userId")
|
|
|
|
if not mandateId or not userId:
|
|
logger.error(f"Missing context in token: mandateId={mandateId}, userId={userId}")
|
|
raise credentialsException
|
|
|
|
except JWTError:
|
|
logger.warning("Invalid JWT Token")
|
|
raise credentialsException
|
|
|
|
# Initialize Gateway Interface with context
|
|
appInterface = getRootInterface()
|
|
|
|
# Retrieve user from database
|
|
user = appInterface.getUserByUsername(username)
|
|
|
|
if user is None:
|
|
logger.warning(f"User {username} not found")
|
|
raise credentialsException
|
|
|
|
# Check if user is enabled
|
|
if not user.enabled:
|
|
logger.warning(f"User {username} is disabled")
|
|
raise HTTPException(status_code=status.HTTP_403_FORBIDDEN, detail="User is disabled")
|
|
|
|
# Ensure the user has the correct context
|
|
if str(user.mandateId) != str(mandateId) or str(user.id) != str(userId):
|
|
logger.error(f"User context mismatch: token(mandateId={mandateId}, userId={userId}) vs user(mandateId={user.mandateId}, id={user.id})")
|
|
raise HTTPException(
|
|
status_code=status.HTTP_401_UNAUTHORIZED,
|
|
detail="User context has changed. Please log in again.",
|
|
headers={"WWW-Authenticate": "Bearer"},
|
|
)
|
|
|
|
return user
|
|
|
|
def getCurrentUser(currentUser: User = Depends(_getUserBase)) -> User:
|
|
"""Get current active user with additional validation."""
|
|
# Check if current user is enabled
|
|
if not currentUser.enabled:
|
|
raise HTTPException(
|
|
status_code=status.HTTP_403_FORBIDDEN,
|
|
detail="User is disabled"
|
|
)
|
|
return currentUser
|
|
|
|
|