fastapi_auth2

API key based Authentication package for FastAPI, focused on simplicity and ease of use:

• Full functionality out of the box, no configuration required
• API key security with local sqlite or postgres database backend, working with both header and query parameters
• Default 15 days deprecation for generated API keys
• Key creation, revocation, renewing, and usage logs handled through administrator endpoints
• Username, Email address and password(hashing + salting) verification features.
• Lightweight, minimal dependencies required.

Updates

1. Added partial support for mongodb database backend.
2. Added support for environment variables through .env files.
3. Added example.env file to show how to use environment variables.
4. Updated README.md to reflect changes.
5. Updated documentation to reflect changes.
6. Working on adding support for mysql database backend.

Installation

pip install fastapi_auth2

Usage

Creating an application

from fastapi import Depends, FastAPI
from fastapi_auth import api_key_router, api_key_security


app = FastAPI(
    description="FastAPI Auth is a package that provides authentication based API security with FastAPI and Postgres Database, SQLite Database or MongoDB Database",
    title="FastAPI Auth Example",  
    version=1.0,
)


app.include_router(api_key_router, prefix="/auth", tags=["_auth"])

@app.get("/unsecure")
async def unsecure_endpoint():
    return {"message": "This is a unsecure endpoint"}

@app.get("/secure", dependencies=[Depends(api_key_security)])
async def secure_endpoint():
    return {"message": "This is a secure endpoint"}

Resulting app is:

API key creation through docs

Start your API and check the logs for the automatically generated secret key if you did not provide one through environment variables.

Go to /docs on your API and inform this secret key in the Authorize/Secret header box. All the administrator endpoints only support header security to make sure the secret key is not inadvertently shared when sharing an URL.

Then, you can use /auth/new to generate a new API key.

And finally, you can use this API key to access the secure endpoint.

API key creation in python

You can of course automate API key acquisition through python with requests and directly querying the endpoints.

If you do so, you can hide the endpoints from your API documentation with the environment variable FASTAPI_AUTH_HIDE_DOCS.

Configuration

Environment variables:

• FASTAPI_AUTH_SECRET: Secret administrator key

  • Generated automatically on server startup if not provided
  • Allows generation of new API keys, revoking of existing ones, and API key usage view
  • It being compromised compromises the security of the API

• FASTAPI_AUTH_HIDE_DOCS: Whether or not to hide the API key related endpoints from the documentation

• FASTAPI_AUTH_DB_LOCATION: Location of the local sqlite database file

  • sqlite.db in the running directory by default
  • When running the app inside Docker, use a bind mount for persistence

• FASTAPI_AUTH_AUTOMATIC_EXPIRATION: Duration, in days, until an API key is deemed expired

  • 15 days by default

• DATABASE_MODE: If set to postgres, the package will use a postgres database instead of sqlite

• URI: Location of the postgres database

  • postgresql://postgres:postgres@localhost:5432/postgres by default
  • Only used if DEV_MODE is set to False

Contributing

See CONTIBUTING.md for more information.

Setting up python environment

poetry install
poetry shell

Setting up pre-commit hooks

pre-commit install

Running tests

pytest

Running the dev environment

The attached docker image runs a test app on localhost:8080 with secret key TEST_SECRET. Run it with:

docker-compose build && docker-compose up

TODO

• Add more tests
• Add more database backends
• Add more authentication methods