How do I integrate LambdAuth with a React frontend?

You can call the AWS Lambda functions directly using the AWS SDK or set up API Gateway. Use the provided HTML samples as a reference to structure API calls for registration, login, and other flows in your React components.

LambdAuth vs Amazon Cognito User Pools: which is better for production?

LambdAuth is a sample for learning serverless patterns, while Cognito User Pools are a managed, production-ready service. For live apps, Cognito offers more features, security, and AWS support, as the author recommends.

Is LambdAuth secure enough for handling real user data?

Due to its use of HMAC-SHA1 hashing and sample status, it's not recommended for production security. It's best for prototypes or education, where you can modify it to use stronger algorithms if needed.

How to customize the email templates sent by LambdAuth?

You need to modify the Lambda functions that use Amazon SES, specifically the email-sending logic. Update the code to change content or format, but ensure SES is properly configured in your AWS account.

Can I use LambdAuth with other databases like PostgreSQL?

No, it's tightly coupled with DynamoDB as the persistent storage. Switching databases would require rewriting the data layer in the Lambda functions, which defeats the purpose of this sample.

What are the estimated AWS costs for running LambdAuth?

Costs depend on Lambda invocations, DynamoDB read/write units, SES email sends, and other services. For low-traffic apps, it can be minimal, but scale with usage—monitor via AWS billing to avoid surprises.

How to handle user sessions or JWTs with LambdAuth?

LambdAuth returns tokens from Cognito via GetOpenIdTokenForDeveloperIdentity. Use these tokens for session management in your app, integrating with Cognito's identity pool for role-based access control.

Open-Awesome

LambdAuth

MITJavaScriptv1.1

A sample serverless authentication service using AWS Lambda and DynamoDB, designed for cost-efficient and scalable user management.

GitHub

1.4k stars223 forks0 contributors

What is LambdAuth?

LambdAuth is a sample authentication service built with a serverless architecture on AWS. It provides core user management functions—such as registration, login, and password reset—using AWS Lambda for execution and DynamoDB for storage. It solves the need for a scalable, cost-efficient authentication backend that integrates seamlessly with Amazon Cognito for identity federation.

Target Audience

Developers and architects exploring serverless authentication patterns on AWS, or those needing a reference implementation for integrating custom auth with Amazon Cognito.

Value Proposition

It offers a fully functional, security-focused example that is easy to deploy and modify, demonstrating best practices for serverless auth without the complexity of building from scratch.

Overview

A sample authentication service implemented with a server-less architecture, using AWS Lambda to host and execute the code and Amazon DynamoDB as persistent storage. This provides a cost-efficient solution that is scalable and highly available and can be used with Amazon Cognito for Developer Authenticated Identities.

Use Cases

Best For

Learning serverless authentication patterns on AWS
Prototyping a custom auth service for AWS-based applications
Integrating developer-authenticated identities with Amazon Cognito
Studying secure password storage with salting and hashing
Deploying a cost-effective, scalable auth backend for low-traffic apps
Referencing AWS Lambda and DynamoDB integration for user management

Not Ideal For

Production applications requiring enterprise-grade security and maintenance
Teams seeking a multi-cloud or vendor-agnostic authentication solution
Projects needing modern password hashing algorithms like bcrypt or Argon2
Developers who rely on active community support or frequent updates

Pros & Cons

Pros

Serverless Scalability

Built entirely on AWS Lambda and DynamoDB, it offers automatic scaling and eliminates server management, making it cost-efficient for variable workloads as described in the serverless foundation.

AWS Cognito Integration

Seamlessly integrates with Amazon Cognito for developer-authenticated identities, enabling easy identity federation and role assumption, as highlighted in the authentication flows.

Security-First Design

Implements salted HMAC-SHA1 hashing for passwords and includes email verification via Amazon SES, adhering to basic security best practices outlined in the README.

Easy Deployment Setup

Provides Bash scripts like init.sh and deploy.sh to automate AWS resource creation and updates, simplifying initial deployment and configuration as per the installation guide.

Cons

Outdated Hashing Method

Uses HMAC-SHA1 for password storage, which is considered weak compared to modern algorithms like bcrypt, posing a security risk for current applications.

Sample Project Limitations

Explicitly labeled as a sample and not production-ready, with the author recommending Amazon Cognito User Pools instead, limiting its reliability for real-world use.

AWS Vendor Lock-In

Heavily dependent on AWS services like Lambda, DynamoDB, and Cognito, making it unsuitable for multi-cloud or non-AWS environments without significant rewrites.

Complex Configuration

Requires manual setup of AWS CLI, jq tool, and detailed config.json editing, which can be error-prone and challenging for those unfamiliar with AWS ecosystems.

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