v0 and Duo Security integration: Step-by-Step Guide 2025

 

Step 1: Create the Duo Configuration File (duoConfig.ts)

 

Create a new file in your project called duoConfig.ts. This file stores the configuration details you received from Duo Security. In your project’s file tree, add the file at the root level (or in a configuration folder if you have one).

export const duoConfig = {
  ikey: "DIXXXXXXXXXXXXXXXXXX",        // Your Duo Integration Key
  skey: "deadbeefdeadbeefdeadbeefdeadbeefdeadbeef",  // Your Duo Secret Key
  akey: "arandomapplication_key",       // Your Application Key (choose any random string)
  host: "api-xxxxxxxx.duosecurity.com"     // Your Duo API Hostname
};

Make sure you replace the placeholder values with your actual Duo account credentials.

 

Step 2: Create the Duo Integration File (duo.ts)

 

Next, add a new file named duo.ts. In this file you will write a function that “signs” the Duo request. Duo uses a signing process so the Duo iframe can safely authenticate the user. In many real-world applications the signing algorithm is provided by Duo’s SDK; here, we provide a very basic stub so you know where to place your code. (Replace this stub with the actual signing algorithm per Duo’s documentation if available.)

import { duoConfig } from "./duoConfig";
// In a real integration, you might need the crypto module to generate a secure HMAC.
// Since v0 does not allow you to install dependencies via a terminal, we are keeping this example simple.

export function signRequest(username: string): string {
  // For a real Duo integration, follow the official Duo signing algorithm here:
  // https://duo.com/docs/duoweb
  // This is a placeholder implementation:
  const signature = "signedrequestfor_" + username;
  return signature;
}

This function receives a username and returns a “signed” request string. In production, use the proper signing method as described in Duo’s documentation.

 

Step 3: Update Your Main Server File (index.ts) to Add a Duo Route

 

Locate your main server file (for example, index.ts or app.ts). In this file, you already have your server setup (using Express or similar). Add a new route that serves an HTML page with the Duo iframe. Place the following code in the appropriate section where you configure your routes.

import express, { Request, Response } from "express";
import { duoConfig } from "./duoConfig";
import { signRequest } from "./duo";

const app = express();

// Other routes and middleware ...

// Add a new route for Duo Security integration
app.get("/duo", (req: Request, res: Response) => {
  // Retrieve a username (in practice, you would get this from your session or login information)
  const username = (req.query.username as string) || "testuser";
  // Sign the request using your Duo integration function
  const duoSig = signRequest(username);
  
  // Serve an HTML page containing the Duo iframe.
  res.send(`
    
      
        
        
        
      
      
        
Duo Security Authentication
        
      
    
  `);
});

// Example route to handle the Duo callback after successful authentication
app.post("/duo_callback", (req: Request, res: Response) => {
  // Handle the Duo response here.
  // In a real application, verify the response signature and complete the user authentication.
  res.send("Duo authentication successful!");
});

// Start the server
app.listen(8080, () => {
  console.log("Server running on port 8080");
});

Place this code in your main server file. The new route “/duo” will render an HTML page containing the Duo iframe once visited. You can test it by adding a username query parameter (for example, /duo?username=alice).

 

Step 4: Adding Dependencies Without Using the Terminal

 

Since your v0 project environment does not support a terminal, dependency management must be done by including the necessary packages in your project files.

If you’re using Express and TypeScript, ensure you have a file named package.json in your project root with the required dependencies. Create or update your package.json file and add the following content. (Your environment might automatically detect changes in this file.)

{
  "name": "v0-project",
  "version": "0.1.0",
  "main": "index.js",
  "dependencies": {
    "express": "^4.17.1"
  },
  "devDependencies": {
    "@types/express": "^4.17.13",
    "typescript": "^4.5.2"
  },
  "scripts": {
    "start": "node index.js"
  }
}

If your v0 project redeploys automatically when file changes are detected, saving this file should trigger the dependency installation.

 

Step 5: Testing the Integration

 

Once you have added the new files and updated your main server (index.ts) with the Duo route, test the integration by performing the following steps:

1. Open your project in the v0 environment.
2. Navigate to the URL path "/duo" (for example, http://your-project-url/duo).
3. If desired, add a username query parameter (e.g., http://your-project-url/duo?username=alice).
4. The page should render a Duo iframe which will load the Duo Security script and display the authentication interface.

Make sure that you have updated all placeholder values with the actual values from your Duo Security account. Also, ensure that your project is configured to compile TypeScript to JavaScript if your environment does not do this automatically.

By following these steps you will have integrated Duo Security into your v0 project.