SimpleAuth.link API

Passwordless authentication for your users using just an email address.

This repository contains the source code of the SimpleAuth.link API Service.

Read full documentation here.

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Technical Details 💻

Token Generation Process 🔑

• By leveraging the Ed25519 signature algorithm, the service deterministically generates a private key using your App ID and secret.
• This ensures that each token is cryptographically secure and uniquely tied to your application, eliminating the need to store sensitive keys.

Stateless Architecture 🕊️

• SimpleAuth.link works without a traditional database. It does not store any user data, including email addresses, on its servers.
• Instead, the data generated is self-contained, requiring no further information or state to be used. This stateless design increases security and reduces the risk of data breaches.

Development 🧑‍💻

Prerequisites 📝

• Go (version 1.24 or later recommended)
• Docker (optional, for containerized deployment)

Clone the Repository 📥

git clone --branch v2 https://github.com/SimpleAuthLink/authapi.git
cd authapi

Code Structure 🪜

• Modularity: The repository is structured into packages to simplify testing and future expansion.

  • api/: Contains the core API endpoint definitions and routing logic.
  • cmd/: Entry points and command-line utilities for running the API server.
  • docker/: Dockerfiles and configuration for containerized builds.
  • internal/: Internal packages and libraries used across the application.
  • notification/: Code handling user notifications.
  • token/: Modules for token creation and management.
  • .github/: GitHub-specific workflows and configurations (CI/CD, issue templates, etc.).

  This layout supports modular development and clear separation of concerns across different parts of the API service.

• Testing: Use the standard Go testing framework to run tests. You can run tests with:

  go test ./...

Run with go 🦫

For development purposes, you can run the API server directly with Go.

go run ./cmd/authapi -h

Usage of authapi:
  -email-addr string
        email account address
  -email-host string
        email server host
  -email-pass string
        email account password
  -email-port int
        email server port (default 587)
  -host string
        service host (default "0.0.0.0")
  -port int
        service host (default 8080)
  -secret string
        secret used to generate the tokens (default "simpleauthlink-secret")

Run with docker 🐳

1. Prepare the Environment File

   Copy the example.env file to .env and edit the file to fill in your parameters:

   HOST="localhost"
   PORT=8080
   EMAIL_ADDR="[email protected]"
   EMAIL_PASS="smtp_server_password"
   EMAIL_HOST="smtp.example.com"
   EMAIL_PORT=587
   SECRET="my_backend_secret"

2. Build the Docker Image

   Run the following command in the root of your project to build the image:

   docker build -f docker/Dockerfile.prod -t simpleauthlink .

3. Run the Docker Container

   Once the image is built, start a container using the environment file:

   docker run --name simpleauthlink --env-file .env -p 8080:80 simpleauthlink

   This command maps the container’s port 80 to port 8080 on your host.