Bazis Authing

Extension package for Bazis providing a flexible authentication system with support for various login methods.

Quick Start

# Install the package
uv add bazis-authing

# Configure in settings.py
BAZIS_AUTH_KINDS = [
    'bazis.contrib.authing.services.password',  # Username/password authentication
]

# Register routes in main router.py
from bazis.core.routing import BazisRouter

router = BazisRouter(prefix='/api/v1')
from bazis.contrib.authing.routes import router as authing_router
from bazis.contrib.authing.services.password.router import router as password_router

router.register(prefix='/authing', arg=authing_router)
# the router of every service in BAZIS_AUTH_KINDS
router.register(prefix='/authing', arg=password_router)

Table of Contents

• Description
• Requirements
• Installation
• Core Components
  • /auth/ Endpoint
  • Authentication Methods
  • AuthStore
• Usage
  • Project Setup
  • Basic Password Authentication
  • Getting JWT Token
• How It Works
• Examples
• Extension
• License
• Links

Description

Bazis Authing is an extension package for the Bazis framework that provides a flexible and extensible authentication system. The package includes:

• Universal /auth/ endpoint — central point for checking authentication status and getting available login methods
• Built-in password authentication — ready-to-use module for username/password authentication
• AuthStore — the state of a sign-in, kept in the cache under a store token
• Support for multiple authentication methods — easily add OAuth, SAML, LDAP, and other providers
• JWT integration — automatic JWT token generation after successful authentication

This package requires bazis and bazis-users packages to be installed.

Requirements

• Python: 3.12+
• bazis: latest version
• bazis-users: latest version
• PostgreSQL: 12+
• Redis: For caching

Installation

Using uv (recommended)

uv add bazis-authing

Using pip

pip install bazis-authing

Core Components

/auth/ Endpoint

Central endpoint for authentication operations.

URL: GET /api/v1/authing/auth/

Purpose:

• Check current authentication status
• Get list of available login methods
• Get JWT token for authenticated users (a signed-in authorization store gives it once: the store is deleted, the next request with its token is not authenticated)

Behavior:

1. If user is NOT authenticated → returns 401 error with list of available login methods:

{
  "errors": [
    {
      "status": 401,
      "code": "UNAUTHORIZED",
      "title": "User is not authorized.",
      "detail": "User is not authorized.",
      "meta": {
        "actions": [
          {
            "code": "password",
            "name": "Login/Password",
            "url": "/api/v1/authing/password/",
            "method": "POST"
          }
        ],
        "token": "eyJhbGciOiJIUzI1NiIsInR5cCI6IkpXVCJ9..."
      }
    }
  ]
}

2. If user is authenticated → returns user data and JWT token:

{
  "user_id": "123e4567-e89b-12d3-a456-426614174000",
  "username": "user1",
  "first_name": "John",
  "last_name": "Doe",
  "email": "user1@example.com",
  "token": "eyJhbGciOiJIUzI1NiIsInR5cCI6IkpXVCJ9...",
  "logout_actions": [
    {
      "url": "/api/v1/authing/logout/",
      "method": "POST"
    }
  ]
}

Authentication Methods

Password Authentication

Built-in module for username and password authentication.

Module code: password

Endpoints:

1. POST /api/v1/authing/password/ — web authentication with redirect

   • Accepts username and password
   • On successful authentication, sets cookie and redirects to /auth/
   • On failed authentication, returns error

2. POST /api/v1/authing/password/token/ — deprecated, removed in 3.0: the token endpoint of bazis-users (POST BAZIS_OPENAPI_TOKEN_URL, which Swagger UI uses) under this path

   • Accepts username and password via OAuth2PasswordRequestForm
   • Returns JWT token directly without cookie

Request schema (POST /password/):

{
  "username": "user1",
  "password": "password123"
}

The token endpoint answers {"access_token": "...", "token_type": "bearer"}.

AuthStore

The state of a sign-in: the data lives in the default cache (auth_store_<key>), the client holds only the store token (a JWT signed with SECRET_KEY, with the random key as sub and no expiration), as the bearer token, the cookie or the query parameter BAZIS_AUTH_COOKIE_NAME.

Location: bazis.contrib.authing.service.AuthStore

Purpose:

• Store temporary authentication data in the cache
• Track multi-step authentication progress
• Pass errors between requests

Main methods:

• login(user, request, auth_type) — registers successful user authentication
• set_error(code, detail) — saves authentication error
• data_reset() — clears storage
• redirect_to_auth() — the answer of a login: 303 to /auth/ with the cookie, without the store token in the URL
• response_set_cookie(response) — adds the store cookie to a response (HttpOnly, SameSite=Lax, Secure unless BAZIS_AUTH_COOKIE_SECURE is off, for the lifetime of the store)
• claim() — the signed-in user id, once (deletes the store); used by /auth/

AuthStoreTokenRequired:

Dependency for endpoints requiring authentication token in cookie:

from bazis.contrib.authing.service import AuthStoreTokenRequired
from fastapi import Depends

@router.post('/password/')
def password_auth(auth_store: AuthStoreTokenRequired = Depends()):
    # auth_store guaranteed to contain valid token
    pass

Usage

Project Setup

1. Add to settings.py:

# settings.py

# List of available authentication methods
BAZIS_AUTH_KINDS = [
    'bazis.contrib.authing.services.password',  # Username/password
    # Add other methods here
]

2. Register routes:

# router.py
from bazis.core.routing import BazisRouter

router = BazisRouter(prefix='/api/v1')

# Register authentication routes
from bazis.contrib.authing.routes import router as authing_router
from bazis.contrib.authing.services.password.router import router as password_router

router.register(prefix='/authing', arg=authing_router)
# the router of every service in BAZIS_AUTH_KINDS
router.register(prefix='/authing', arg=password_router)

Basic Password Authentication

Typical web authentication flow:

Step 1: Client requests authentication status:

GET /api/v1/authing/auth/

Response (if not authenticated):

{
  "errors": [
    {
      "status": 401,
      "code": "UNAUTHORIZED",
      "meta": {
        "actions": [
          {
            "code": "password",
            "name": "Login/Password",
            "url": "/api/v1/authing/password/",
            "method": "POST"
          }
        ],
        "token": "auth_token_here"
      }
    }
  ]
}

Step 2: Client performs authentication:

POST /api/v1/authing/password/
Authorization: Bearer auth_token_here
Content-Type: application/json

{
  "username": "user1",
  "password": "password123"
}

Response (successful authentication):

HTTP 303 See Other
Location: /api/v1/authing/auth/
Set-Cookie: bazis_auth=auth_token_here; HttpOnly; Max-Age=60; Path=/; SameSite=lax; Secure

Step 3: Client follows redirect with the same token and gets user data (once: the store is deleted, a new login needs a new store):

GET /api/v1/authing/auth/
Authorization: Bearer auth_token_here

Response:

{
  "user_id": "123e4567-e89b-12d3-a456-426614174000",
  "username": "user1",
  "email": "user1@example.com",
  "token": "eyJhbGciOiJIUzI1NiIsInR5cCI6IkpXVCJ9..."
}

Getting JWT Token

For direct JWT token retrieval (e.g., for mobile apps or Swagger), the token endpoint of bazis-users (BAZIS_OPENAPI_TOKEN_URL, default /api/openapi-token/):

POST /api/openapi-token/
Content-Type: application/x-www-form-urlencoded

username=user1&password=password123

Response:

{
  "access_token": "eyJhbGciOiJIUzI1NiIsInR5cCI6IkpXVCJ9...",
  "token_type": "bearer"
}

This token can be used in the Authorization: Bearer <token> header for all subsequent requests.

Logout

POST /api/v1/authing/logout/
Authorization: Bearer auth_token_here

Deletes the authorization stores of the request (bearer token, cookie or query parameter) and the bazis_auth cookie; answers 204 and is idempotent. The session JWT is stateless: the client drops it.

How It Works

System Architecture

┌─────────────┐
│   Client    │
└──────┬──────┘
       │
       │ 1. GET /auth/ (no cookie)
       ▼
┌─────────────────────┐
│  /auth/ endpoint    │◄─── Checks user status
└──────┬──────────────┘
       │
       │ 2. Returns 401 + available actions
       ▼
┌─────────────┐
│   Client    │
└──────┬──────┘
       │
       │ 3. POST /password/ (with credentials)
       ▼
┌─────────────────────┐
│ Password endpoint   │◄─── Authenticates user
└──────┬──────────────┘
       │
       │ 4. Sets cookie + redirects to /auth/
       ▼
┌─────────────────────┐
│  /auth/ endpoint    │◄─── Returns user data + JWT
└──────┬──────────────┘
       │
       │ 5. Returns user + token
       ▼
┌─────────────┐
│   Client    │
└─────────────┘

Authentication Process

1. Initialization:

   • Client requests /auth/ without cookie
   • System creates temporary token and returns it in meta
   • Client saves this token

2. Authentication:

   • Client sends credentials with token in cookie
   • System validates credentials via Django authenticate()
   • On success — saves user_id in AuthStore
   • Sets updated cookie and redirects

3. Token Retrieval:

   • Client requests /auth/ with cookie
   • System extracts user_id from AuthStore
   • Generates JWT token via user.jwt_build()
   • Returns user data and token

Security

• Single-use store — /auth/ gives the session of a signed-in store once
• Temporary tokens — a store lives BAZIS_AUTH_COOKIE_LIFETIME seconds (default 600), a signed-in one BAZIS_AUTH_CLAIM_LIFETIME (default 60); the cookie lives as long
• Cookie attributes — HttpOnly, SameSite=Lax, Secure (BAZIS_AUTH_COOKIE_SECURE=false for development over plain HTTP)
• No tokens in redirects — the login redirects and the Google state do not carry the store token; only /google-auth-init/?bazis_auth=<store token> has it in the URL
• Known limitation (login CSRF) — the Google init is a GET with the store token, so an attacker can send a victim /google-auth-init/?bazis_auth=<attacker's store>: a victim who already consented in Google signs the attacker's store in without a prompt, and the attacker takes the session. Planned fix: a POST init with the store token as the bearer token that returns a one-time ticket for the window URL
• JWT tokens — for further API operations

Examples

Client Application Usage Example

// JavaScript client for authentication

class AuthClient {
  constructor(baseUrl) {
    this.baseUrl = baseUrl;
    this.authToken = null;
    this.jwtToken = null;
  }

  async checkAuth() {
    const response = await fetch(`${this.baseUrl}/authing/auth/`, {
      credentials: 'include'
    });

    if (response.ok) {
      const data = await response.json();
      this.jwtToken = data.token;
      return { authenticated: true, user: data };
    }

    const error = await response.json();
    this.authToken = error.errors[0].meta.token;
    return {
      authenticated: false,
      actions: error.errors[0].meta.actions
    };
  }

  async loginWithPassword(username, password) {
    const response = await fetch(`${this.baseUrl}/authing/password/`, {
      method: 'POST',
      credentials: 'include',
      headers: {
        'Content-Type': 'application/json',
        'Cookie': `bazis_auth=${this.authToken}`
      },
      body: JSON.stringify({ username, password }),
      redirect: 'follow'
    });

    if (response.ok) {
      return await this.checkAuth();
    }

    throw new Error('Authentication failed');
  }

  async apiRequest(url, options = {}) {
    return fetch(url, {
      ...options,
      headers: {
        ...options.headers,
        'Authorization': `Bearer ${this.jwtToken}`
      }
    });
  }
}

// Usage
const auth = new AuthClient('https://api.example.com/api/v1');

// Check authentication status
const status = await auth.checkAuth();

if (!status.authenticated) {
  // Perform login
  await auth.loginWithPassword('user1', 'password123');
}

// Now you can make requests to protected endpoints
const response = await auth.apiRequest('/api/v1/protected/resource/');

Authentication Testing

import pytest
from bazis_test_utils.utils import get_api_client
from bazis.contrib.users import get_user_model

User = get_user_model()

@pytest.mark.django_db(transaction=True)
def test_password_authentication_flow(sample_app):
    # Create user
    user = User.objects.create_user(
        'testuser',
        email='test@example.com',
        password='testpass123'
    )

    # Step 1: Get status (not authenticated)
    response = get_api_client(sample_app).get('/api/v1/authing/auth/')
    assert response.status_code == 400
    
    data = response.json()
    assert 'errors' in data
    error = data['errors'][0]
    assert error['code'] == 'UNAUTHORIZED'
    
    auth_token = error['meta']['token']
    actions = error['meta']['actions']
    
    # Check available login methods
    assert len(actions) == 1
    assert actions[0]['code'] == 'password'

    # Step 2: Perform authentication
    response = get_api_client(sample_app, auth_token).post(
        '/api/v1/authing/password/',
        json_data={
            'username': 'testuser',
            'password': 'testpass123',
        },
    )
    assert response.status_code == 200

    # Step 3: Verify received data
    data = response.json()
    assert data['user_id'] == str(user.id)
    assert data['username'] == 'testuser'
    assert data['email'] == 'test@example.com'
    assert 'token' in data  # JWT token

    # Step 4: Test invalid credentials
    response = get_api_client(sample_app, auth_token).post(
        '/api/v1/authing/password/',
        json_data={
            'username': 'testuser',
            'password': 'wrongpassword',
        },
    )
    assert response.status_code == 400

Extension

Adding New Authentication Method

You can add your own authentication method (OAuth, SAML, LDAP, etc.):

1. Create a module (e.g., myapp/auth_oauth.py):

from bazis.core.routing import BazisRouter
from django.utils.translation import gettext_lazy as _

AUTH_CODE = 'oauth'

router = BazisRouter(prefix='/oauth', tags=[_('OAuth Authentication')])

def get_login_action():
    """Returns login method information for /auth/"""
    return {
        'code': AUTH_CODE,
        'name': 'OAuth Login',
        'url': '/api/v1/authing/oauth/',
        'method': 'GET',
    }

def get_logout_actions():
    """Returns logout actions (optional): a list of actions"""
    return [
        {
            'url': '/api/v1/authing/oauth/logout/',
            'method': 'POST',
        },
    ]

@router.get('/')
def oauth_login():
    # OAuth authentication logic
    pass

2. Add to settings.py:

BAZIS_AUTH_KINDS = [
    'bazis.contrib.authing.services.password',
    'myapp.auth_oauth',  # Your module
]

3. Register routes:

# myapp/router.py
from bazis.core.routing import BazisRouter
from . import auth_oauth

router = BazisRouter()
router.include_router(auth_oauth.router)

Now your authentication method will automatically appear in the list of available methods in /auth/!

License

Apache License 2.0

See LICENSE file for details.

Links

• Bazis Documentation — main repository
• Bazis Users — user management package
• Bazis Authing Repository — package repository
• Issue Tracker — report bugs or request features

Support

If you have questions or issues:

• Check Bazis documentation
• Search existing issues
• Create a new issue with detailed information

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