| # Licensed to the Apache Software Foundation (ASF) under one |
| # or more contributor license agreements. See the NOTICE file |
| # distributed with this work for additional information |
| # regarding copyright ownership. The ASF licenses this file |
| # to you under the Apache License, Version 2.0 (the |
| # "License"); you may not use this file except in compliance |
| # with the License. You may obtain a copy of the License at |
| # |
| # http://www.apache.org/licenses/LICENSE-2.0 |
| # |
| # Unless required by applicable law or agreed to in writing, |
| # software distributed under the License is distributed on an |
| # "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY |
| # KIND, either express or implied. See the License for the |
| # specific language governing permissions and limitations |
| # under the License. |
| from abc import ABC, abstractmethod |
| from typing import Any, Dict, List, Optional |
| |
| from flask import Flask |
| from sqlalchemy import TypeDecorator |
| from sqlalchemy_utils import EncryptedType |
| |
| |
| class AbstractEncryptedFieldAdapter(ABC): |
| @abstractmethod |
| def create( |
| self, |
| app_config: Optional[Dict[str, Any]], |
| *args: List[Any], |
| **kwargs: Optional[Dict[str, Any]] |
| ) -> TypeDecorator: |
| pass |
| |
| |
| class SQLAlchemyUtilsAdapter(AbstractEncryptedFieldAdapter): |
| def create( |
| self, |
| app_config: Optional[Dict[str, Any]], |
| *args: List[Any], |
| **kwargs: Optional[Dict[str, Any]] |
| ) -> TypeDecorator: |
| if app_config: |
| return EncryptedType(*args, app_config["SECRET_KEY"], **kwargs) |
| |
| raise Exception("Missing app_config kwarg") |
| |
| |
| class EncryptedFieldFactory: |
| def __init__(self) -> None: |
| self._concrete_type_adapter: Optional[AbstractEncryptedFieldAdapter] = None |
| self._config: Optional[Dict[str, Any]] = None |
| |
| def init_app(self, app: Flask) -> None: |
| self._config = app.config |
| self._concrete_type_adapter = self._config[ |
| "SQLALCHEMY_ENCRYPTED_FIELD_TYPE_ADAPTER" |
| ]() |
| |
| def create( |
| self, *args: List[Any], **kwargs: Optional[Dict[str, Any]] |
| ) -> TypeDecorator: |
| if self._concrete_type_adapter: |
| return self._concrete_type_adapter.create(self._config, *args, **kwargs) |
| |
| raise Exception("App not initialized yet. Please call init_app first") |