96 lines
2.9 KiB
Python
96 lines
2.9 KiB
Python
"""
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C-Stone Invoice Check — Authentifizierung
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JWT-basierte Auth mit PyJWT
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"""
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import os
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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
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from fastapi.security import OAuth2PasswordBearer
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from sqlalchemy.orm import Session
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from sqlalchemy import Column, Integer, String, Boolean, DateTime
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from backend.database import get_db
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# Konfiguration
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SECRET_KEY = os.getenv("SECRET_KEY", "your-secret-key-change-in-production")
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ALGORITHM = "HS256"
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ACCESS_TOKEN_EXPIRE_MINUTES = 30
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# Hash-Kontext
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pwd_context = CryptContext(schemes=["bcrypt"], deprecated="auto")
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# OAuth2
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oauth2_scheme = OAuth2PasswordBearer(tokenUrl="/auth/token")
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# Router
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from fastapi import APIRouter
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router = APIRouter()
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class User(Base):
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__tablename__ = "users"
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id = Column(Integer, primary_key=True, index=True)
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username = Column(String, unique=True, index=True)
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hashed_password = Column(String)
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is_active = Column(Boolean, default=True)
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created_at = Column(DateTime, default=datetime.utcnow)
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def verify_password(plain_password: str, hashed_password: str) -> bool:
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"""Prüft Passwort gegen Hash"""
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return pwd_context.verify(plain_password, hashed_password)
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def get_password_hash(password: str) -> str:
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"""Erstellt Hash aus Passwort"""
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return pwd_context.hash(password)
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def create_access_token(data: dict, expires_delta: Optional[timedelta] = None) -> str:
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"""Erstellt JWT 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 authenticate_user(db: Session, username: str, password: str) -> Optional[User]:
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"""Authentifiziert Benutzer"""
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user = db.query(User).filter(User.username == username).first()
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if not user:
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return None
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if not verify_password(password, user.hashed_password):
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return None
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return user
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async 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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"""Holt aktuellen Benutzer aus Token"""
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credentials_exception = HTTPException(
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status_code=status.HTTP_401_UNAUTHORIZED,
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detail="Could not validate credentials",
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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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username: str = payload.get("sub")
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if username is None:
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raise credentials_exception
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except JWTError:
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raise credentials_exception
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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 credentials_exception
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return user
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