The Problem
Many organizations face challenges in implementing secure and efficient user authentication processes, especially when integrating with national digital identity systems like Singpass. The traditional manual approach to handling FAPI PAR requests is time-consuming and prone to errors, leading to potential security vulnerabilities and a poor user experience. This is further complicated by the need to generate and manage signed JWTs, adding complexity to the authentication workflow.
Without an automated solution, developers spend significant time on repetitive tasks such as generating authorization requests, verifying code verifiers, and ensuring compliance with security standards. This not only delays project timelines but also increases the risk of human error, making the system vulnerable to attacks. The lack of automation also hinders scalability, making it difficult to handle increasing user authentication demands efficiently.
The Solution
The solution is an automated Singpass FAPI PAR request workflow built using n8n. This workflow streamlines the entire authentication process, from receiving webhook inputs to generating signed JWTs and submitting PARs to Singpass. By automating these steps, the system ensures secure user authentication with code verifiers, significantly reducing manual effort and improving overall efficiency.
n8n was chosen for its flexibility, ease of integration, and ability to handle complex workflows. Combined with Cloudflare Workers for JWT signing, this tech stack provides a robust and scalable solution for secure authentication. The workflow also includes error handling and monitoring to ensure reliability and compliance with security standards.
How It Works — Streamlining Authentication with n8n
This automated workflow simplifies the Singpass FAPI PAR authentication process, ensuring secure and efficient user access.
- Webhook Trigger: The workflow is initiated by a webhook that receives the initial authentication request.
- Generate Code Verifier: A unique code verifier is generated to enhance security.
- Create Code Challenge: The code verifier is transformed into a code challenge using SHA256 hashing.
- Construct JWT Payload: A JSON Web Token (JWT) payload is constructed with necessary authentication parameters.
- Sign JWT with Cloudflare: The JWT is securely signed using a Cloudflare Worker, ensuring integrity and authenticity.
- Submit PAR to Singpass: The signed JWT is submitted as a Pushed Authorization Request (PAR) to Singpass.
- Receive Authorization URL: Singpass returns an authorization URL with a request URI.
- Return Redirect URL: The workflow returns the authorization redirect URL with the code verifier, completing the authentication process.
💡 Enhanced Security: By using signed JWTs and code verifiers, the workflow ensures a high level of security throughout the authentication process.
What This System Does That Manual Process Can't
Time Savings
Automates the entire authentication process, reducing manual effort and saving significant time.
Enhanced Security
Uses signed JWTs and code verifiers to ensure secure user authentication.
Scalability
Easily handles increasing user authentication demands without compromising performance.
Reduced Errors
Minimizes the risk of human error by automating repetitive tasks.
Improved Compliance
Ensures compliance with security standards and regulations.
Faster Integration
Simplifies integration with Singpass and other authentication systems.
Before vs. After: Streamlined Authentication
Before: Manual Singpass FAPI PAR requests took approximately 15 minutes per user, with a 20% error rate due to manual JWT generation and verification.
After: Automated workflow processes requests in under 60 seconds with near-zero error rate, freeing up developer time for other critical tasks.
Implementation: Live in 3 Weeks
- Planning and Design: Defining the scope, requirements, and architecture of the automated workflow.
- Development and Configuration: Building the n8n workflow and configuring Cloudflare Workers for JWT signing.
- Testing and Validation: Thoroughly testing the workflow to ensure it meets security and performance requirements.
- Deployment: Deploying the workflow to a production environment.
- Monitoring and Optimization: Continuously monitoring the workflow and optimizing its performance.
The Right Fit — and When It Isn't
This solution is ideal for organizations that require secure and efficient user authentication with Singpass. It is particularly beneficial for businesses that handle a large volume of authentication requests and need to minimize manual effort and errors.
However, this solution may not be suitable for organizations with very simple authentication requirements or those that lack the technical expertise to manage n8n workflows and Cloudflare Workers. In such cases, a simpler authentication solution may be more appropriate.