jlacoste
105 lines
3.4 KiB
Python
105 lines
3.4 KiB
Python
import os
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import secrets
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import sys
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from datetime import datetime, timedelta
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import bcrypt
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from fastapi import Depends, HTTPException, status
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from fastapi.security import OAuth2PasswordBearer
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from jose import JWTError, jwt
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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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PLACEHOLDER_KEY = "change-me-to-a-random-64-char-string"
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_raw_secret = os.environ.get("SECRET_KEY", "")
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if not _raw_secret or _raw_secret == PLACEHOLDER_KEY:
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print("╔══════════════════════════════════════════════════╗")
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print("║ ERREUR: SECRET_KEY non défini ou valeur par ║")
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print("║ défaut. Définissez une clé secrète dans .env ║")
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print("║ ou dans les variables d'environnement. ║")
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print("╚══════════════════════════════════════════════════╝")
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sys.exit(1)
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SECRET_KEY = _raw_secret
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ALGORITHM = "HS256"
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ACCESS_TOKEN_EXPIRE_MINUTES = 60 * 24 # 24 hours
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oauth2_scheme = OAuth2PasswordBearer(tokenUrl="/api/auth/login")
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def hash_password(password: str) -> str:
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return bcrypt.hashpw(password.encode(), bcrypt.gensalt()).decode()
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def verify_password(plain: str, hashed: str) -> bool:
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return bcrypt.checkpw(plain.encode(), hashed.encode())
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def create_access_token(data: dict) -> str:
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to_encode = data.copy()
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expire = datetime.utcnow() + timedelta(minutes=ACCESS_TOKEN_EXPIRE_MINUTES)
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to_encode.update({"exp": expire})
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return jwt.encode(to_encode, SECRET_KEY, algorithm=ALGORITHM)
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def get_current_user(
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token: str = Depends(oauth2_scheme),
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db: Session = Depends(get_db),
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) -> User:
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credentials_exception = HTTPException(
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status_code=status.HTTP_401_UNAUTHORIZED,
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detail="Token invalide",
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headers={"WWW-Authenticate": "Bearer"},
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)
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try:
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payload = jwt.decode(token, SECRET_KEY, algorithms=[ALGORITHM])
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sub = payload.get("sub")
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if sub is None:
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raise credentials_exception
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user_id = int(sub)
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token_version = payload.get("token_version", 0)
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except (JWTError, ValueError):
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raise credentials_exception
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user = db.query(User).filter(User.id == user_id).first()
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if user is None:
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raise credentials_exception
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if user.token_version != token_version:
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raise credentials_exception
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return user
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def get_user_from_token(token: str, db: Session) -> User:
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credentials_exception = HTTPException(
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status_code=status.HTTP_401_UNAUTHORIZED,
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detail="Token invalide",
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)
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try:
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payload = jwt.decode(token, SECRET_KEY, algorithms=[ALGORITHM])
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sub = payload.get("sub")
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if sub is None:
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raise credentials_exception
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user_id = int(sub)
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token_version = payload.get("token_version", 0)
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except (JWTError, ValueError):
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raise credentials_exception
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user = db.query(User).filter(User.id == user_id).first()
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if user is None:
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raise credentials_exception
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if user.token_version != token_version:
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raise credentials_exception
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return user
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def require_admin(user: User = Depends(get_current_user)) -> User:
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if not user.is_admin:
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raise HTTPException(
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status_code=status.HTTP_403_FORBIDDEN,
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detail="Accès réservé à l'administrateur",
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)
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return user
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