94 lines
3.2 KiB
Python
94 lines
3.2 KiB
Python
from datetime import datetime, timedelta
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from typing import Optional
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from jose import JWTError, jwt
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from passlib.context import CryptContext
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from fastapi import Depends, HTTPException, status, Header
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from sqlalchemy.orm import Session
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from .database import get_db
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from .models import User
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# Configuration
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SECRET_KEY = "your-secret-key-change-in-production" # Change this in production!
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ALGORITHM = "HS256"
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ACCESS_TOKEN_EXPIRE_MINUTES = 720
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pwd_context = CryptContext(schemes=["argon2"], deprecated="auto")
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def hash_password(password: str) -> str:
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"""Hash a password using bcrypt"""
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return pwd_context.hash(password)
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def verify_password(plain_password: str, hashed_password: str) -> bool:
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"""Verify a password against its hash"""
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return pwd_context.verify(plain_password, hashed_password)
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def create_access_token(data: dict, expires_delta: Optional[timedelta] = None):
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"""Create a JWT access token"""
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to_encode = data.copy()
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if expires_delta:
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expire = datetime.utcnow() + expires_delta
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else:
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expire = datetime.utcnow() + timedelta(minutes=15)
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to_encode.update({"exp": expire})
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encoded_jwt = jwt.encode(to_encode, SECRET_KEY, algorithm=ALGORITHM)
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return encoded_jwt
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def get_current_user(authorization: Optional[str] = Header(None), db: Session = Depends(get_db)) -> User:
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"""Get the current authenticated user from JWT token"""
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if not authorization:
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raise HTTPException(
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status_code=status.HTTP_401_UNAUTHORIZED,
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detail="Missing authorization header",
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headers={"WWW-Authenticate": "Bearer"},
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)
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try:
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scheme, credentials = authorization.split()
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if scheme.lower() != "bearer":
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raise ValueError("Invalid auth scheme")
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except (ValueError, AttributeError):
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raise HTTPException(
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status_code=status.HTTP_401_UNAUTHORIZED,
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detail="Invalid authorization header format",
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headers={"WWW-Authenticate": "Bearer"},
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)
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try:
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payload = jwt.decode(credentials, SECRET_KEY, algorithms=[ALGORITHM])
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username: str = payload.get("sub")
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if username is None:
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raise HTTPException(
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status_code=status.HTTP_401_UNAUTHORIZED,
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detail="Invalid authentication credentials",
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headers={"WWW-Authenticate": "Bearer"},
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)
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except JWTError:
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raise HTTPException(
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status_code=status.HTTP_401_UNAUTHORIZED,
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detail="Invalid authentication credentials",
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headers={"WWW-Authenticate": "Bearer"},
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)
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user = db.query(User).filter(User.username == username).first()
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if user is None:
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raise HTTPException(
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status_code=status.HTTP_401_UNAUTHORIZED,
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detail="Invalid authentication credentials",
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headers={"WWW-Authenticate": "Bearer"},
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)
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return user
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def get_current_admin_user(current_user: User = Depends(get_current_user)) -> User:
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"""Get the current user and verify they are an admin"""
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if not current_user.is_admin:
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raise HTTPException(
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status_code=status.HTTP_403_FORBIDDEN,
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detail="Not enough permissions. Admin access required."
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)
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return current_user
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