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222 lines
7.7 KiB
Python
222 lines
7.7 KiB
Python
"""Модуль авторизации и аутентификации"""
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import os
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from datetime import datetime, timedelta, timezone
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from typing import Annotated
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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 passlib.context import CryptContext
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from sqlmodel import Session, select
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from library_service.models.db import Role, User
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from library_service.models.dto import TokenData
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from library_service.settings import get_session, get_logger
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# Конфигурация из переменных окружения
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ALGORITHM = os.getenv("ALGORITHM", "HS256")
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SECRET_KEY = os.getenv("SECRET_KEY", "your-secret-key-change-in-production")
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ACCESS_TOKEN_EXPIRE_MINUTES = int(os.getenv("ACCESS_TOKEN_EXPIRE_MINUTES", "30"))
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REFRESH_TOKEN_EXPIRE_DAYS = int(os.getenv("REFRESH_TOKEN_EXPIRE_DAYS", "7"))
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# Получение логгера
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logger = get_logger("uvicorn")
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# OAuth2 схема
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oauth2_scheme = OAuth2PasswordBearer(tokenUrl="/api/auth/token")
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# Хэширование паролей
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pwd_context = CryptContext(schemes=["argon2"], deprecated="auto")
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def verify_password(plain_password: str, hashed_password: str) -> bool:
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"""Проверка пароль по его хешу."""
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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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"""Хэширование пароля."""
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return pwd_context.hash(password)
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def create_access_token(data: dict, expires_delta: timedelta | None = None) -> str:
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"""Создание JWT access токена."""
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to_encode = data.copy()
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if expires_delta:
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expire = datetime.now(timezone.utc) + expires_delta
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else:
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expire = datetime.now(timezone.utc) + timedelta(
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minutes=ACCESS_TOKEN_EXPIRE_MINUTES
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)
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to_encode.update({"exp": expire, "type": "access"})
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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 create_refresh_token(data: dict) -> str:
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"""Создание JWT refresh токена."""
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to_encode = data.copy()
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expire = datetime.now(timezone.utc) + timedelta(days=REFRESH_TOKEN_EXPIRE_DAYS)
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to_encode.update({"exp": expire, "type": "refresh"})
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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 decode_token(token: str) -> TokenData:
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"""Декодирование и проверка JWT токенов."""
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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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user_id: int = payload.get("user_id")
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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="Could not validate credentials",
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headers={"WWW-Authenticate": "Bearer"},
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)
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return TokenData(username=username, user_id=user_id)
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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="Could not validate credentials",
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headers={"WWW-Authenticate": "Bearer"},
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)
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def authenticate_user(session: Session, username: str, password: str) -> User | None:
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"""Аутентификация пользователя по имени пользователя и паролю."""
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statement = select(User).where(User.username == username)
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user = session.exec(statement).first()
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if not user or not verify_password(password, user.hashed_password):
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return None
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return user
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def get_current_user(
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token: Annotated[str, Depends(oauth2_scheme)],
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session: Session = Depends(get_session),
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) -> User:
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"""Получить текущего авторизованного пользователя."""
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token_data = decode_token(token)
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user = session.get(User, token_data.user_id)
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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="User not found",
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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_active_user(
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current_user: Annotated[User, Depends(get_current_user)],
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) -> User:
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"""Получить текущего активного пользователя."""
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if not current_user.is_active:
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raise HTTPException(
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status_code=status.HTTP_403_FORBIDDEN, detail="Inactive user"
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)
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return current_user
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def require_role(role_name: str):
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"""Dependency, требующая выполнения определенной роли."""
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def role_checker(current_user: User = Depends(get_current_active_user)) -> User:
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user_roles = [role.name for role in current_user.roles]
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if role_name not in user_roles:
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raise HTTPException(
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status_code=status.HTTP_403_FORBIDDEN,
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detail=f"Role '{role_name}' required",
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)
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return current_user
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return role_checker
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# Создание dependencies
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RequireAuth = Annotated[User, Depends(get_current_active_user)]
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RequireAdmin = Annotated[User, Depends(require_role("admin"))]
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RequireModerator = Annotated[User, Depends(require_role("moderator"))]
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def seed_roles(session: Session) -> dict[str, Role]:
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"""Создаёт роли по умолчанию, если их нет."""
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default_roles = [
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{"name": "admin", "description": "Администратор системы"},
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{"name": "librarian", "description": "Библиотекарь"},
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{"name": "member", "description": "Посетитель библиотеки"},
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]
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roles = {}
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for role_data in default_roles:
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existing = session.exec(
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select(Role).where(Role.name == role_data["name"])
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).first()
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if existing:
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roles[role_data["name"]] = existing
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else:
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role = Role(**role_data)
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session.add(role)
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session.commit()
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session.refresh(role)
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roles[role_data["name"]] = role
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logger.info(f"[+] Created role: {role_data['name']}")
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return roles
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def seed_admin(session: Session, admin_role: Role) -> User | None:
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"""Создаёт администратора по умолчанию, если нет ни одного."""
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existing_admins = session.exec(
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select(User).join(User.roles).where(Role.name == "admin")
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).all()
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if existing_admins:
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logger.info(f"[=] Admin already exists: {existing_admins[0].username}, skipping creation")
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return None
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admin_username = os.getenv("DEFAULT_ADMIN_USERNAME", "admin")
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admin_email = os.getenv("DEFAULT_ADMIN_EMAIL", "admin@example.com")
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admin_password = os.getenv("DEFAULT_ADMIN_PASSWORD")
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generated = False
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if not admin_password:
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import secrets
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admin_password = secrets.token_urlsafe(16)
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generated = True
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admin_user = User(
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username=admin_username,
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email=admin_email,
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full_name="Системный администратор",
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hashed_password=get_password_hash(admin_password),
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is_active=True,
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is_verified=True,
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)
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admin_user.roles.append(admin_role)
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session.add(admin_user)
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session.commit()
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session.refresh(admin_user)
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logger.info(f"[+] Created admin user: {admin_username}")
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if generated:
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logger.warning("=" * 50)
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logger.warning(f"[!] GENERATED ADMIN PASSWORD: {admin_password}")
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logger.warning("[!] Save this password! It won't be shown again!")
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logger.warning("=" * 50)
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return admin_user
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def run_seeds(session: Session) -> None:
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"""Запускаем создание ролей и администратора."""
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roles = seed_roles(session)
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seed_admin(session, roles["admin"])
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