pyfagorass Implement MojoAuth OIDC (Python / Flask)
This expert AI assistant guide walks you through integrating passwordless authentication into a Python Flask application using MojoAuth's Hosted Login Page as an OIDC identity provider. MojoAuth handles all authentication methods (Magic Links, Email OTP, SMS OTP, Social Login, Passkeys) through its hosted page.
1. Prerequisites
- An existing Python Flask application.
- Python 3.8+ installed.
- An active MojoAuth account.
- MojoAuth OIDC Setup Guide
- Required libraries:
authlib,flask,python-dotenv.
2. Implementation Steps
Step 1: Configure Application in MojoAuth
- Log in to the MojoAuth Dashboard.
- Note your MojoAuth Domain (e.g.,
your-app.mojoauth.com). - Configure the Redirect URI (e.g.,
http://localhost:5000/auth/callback). - Retrieve Client ID and Client Secret.
- Enable your preferred authentication methods.
Step 2: Modify the Existing Flask Project
Substep 2.1: Install Dependencies
pip install authlib flask python-dotenv requests
Substep 2.2: Configure Environment Variables
Create a .env file in the project root:
MOJOAUTH_DOMAIN=your-app.mojoauth.com
MOJOAUTH_CLIENT_ID=your_client_id
MOJOAUTH_CLIENT_SECRET=your_client_secret
MOJOAUTH_REDIRECT_URI=http://localhost:5000/auth/callback
FLASK_SECRET_KEY=a_strong_random_secret
Substep 2.3: Configure OIDC Client
Create a dedicated utility file for OIDC configuration (e.g., lib/oidc.py):
# lib/oidc.py
import os
from authlib.integrations.flask_client import OAuth
oauth = OAuth()
def init_oauth(app):
"""Initialize the OAuth registry with the MojoAuth provider."""
oauth.init_app(app)
oauth.register(
name='mojoauth',
client_id=os.getenv('MOJOAUTH_CLIENT_ID'),
client_secret=os.getenv('MOJOAUTH_CLIENT_SECRET'),
server_metadata_url=f"https://{os.getenv('MOJOAUTH_DOMAIN')}/.well-known/openid-configuration",
client_kwargs={
'scope': 'openid profile email',
},
)
Substep 2.4: Update Login Page/UI
Since MojoAuth handles all authentication on its Hosted Login Page, your login page only needs a "Sign In" link:
<!-- templates/login.html -->
<!DOCTYPE html>
<html>
<head><title>Sign In</title></head>
<body>
<div class="login-container">
<h1>Welcome</h1>
<p>Sign in with your preferred method — passwordless, social login, or passkeys.</p>
{% if error %}
<p style="color: red;">{{ error }}</p>
{% endif %}
<a href="/auth/login" class="sign-in-button">Sign In with MojoAuth</a>
<p class="powered-by">Powered by MojoAuth — Passwordless Authentication</p>
</div>
</body>
</html>
Substep 2.5: Update Backend Logic
Main Application Setup (app.py):
# app.py
import os
import secrets
from dotenv import load_dotenv
from flask import Flask, redirect, url_for, session, render_template, request
from lib.oidc import oauth, init_oauth
load_dotenv()
app = Flask(__name__)
app.secret_key = os.getenv('FLASK_SECRET_KEY')
# Initialize OAuth
init_oauth(app)
@app.route('/login')
def login_page():
error = request.args.get('error')
return render_template('login.html', error=error)
@app.route('/auth/login')
def login():
# Generate a random state for CSRF protection
state = secrets.token_urlsafe(16)
session['oidc_state'] = state
redirect_uri = os.getenv('MOJOAUTH_REDIRECT_URI')
return oauth.mojoauth.authorize_redirect(
redirect_uri,
state=state,
)
@app.route('/auth/callback')
def callback():
try:
# Verify state
stored_state = session.pop('oidc_state', None)
received_state = request.args.get('state')
if stored_state != received_state:
return redirect('/login?error=state_mismatch')
token = oauth.mojoauth.authorize_access_token()
userinfo = token.get('userinfo')
if not userinfo:
userinfo = oauth.mojoauth.userinfo()
# TODO: Create a session for the user based on `userinfo`
session['user'] = dict(userinfo)
print('Authenticated User:', userinfo)
# Redirect to the dashboard or intended page
return redirect('/dashboard')
except Exception as e:
print(f'OIDC Callback Error: {e}')
return redirect('/login?error=auth_failed')
@app.route('/dashboard')
def dashboard():
user = session.get('user')
if not user:
return redirect('/login')
return f"<h1>Dashboard</h1><pre>{user}</pre><a href='/auth/logout'>Logout</a>"
@app.route('/auth/logout')
def logout():
session.clear()
return redirect('/login')
if __name__ == '__main__':
app.run(debug=True, port=5000)
Step 3: Test the Implementation
- Start your application:
python app.py. - Navigate to
http://localhost:5000/login. - Click "Sign In with MojoAuth".
- You should be redirected to the MojoAuth Hosted Login Page.
- Authenticate using any available method.
- After successful authentication, you should be redirected back to
/auth/callbackand then to/dashboard.
3. Additional Considerations
- Error Handling: Enhance the callback route to handle specific OIDC errors gracefully.
- Styling: Adapt the example HTML/CSS to match your application's design system.
- Security: Use a production-grade session backend (e.g., Redis via
flask-session) and serve over HTTPS. - Environment Variables: Never commit
.envto source control. Use secrets management in production.
4. Support
- MojoAuth Documentation: mojoauth.com/docs
- Check application logs: Use server-side logging to debug OIDC flow issues.
- Library Documentation: Refer to the Authlib documentation for advanced configuration.