Are you a recent computer science graduate or someone with a couple of years of experience looking to build web applications that require secure admin logins? One of the most critical aspects of web development is handling user authentication securely. In this interactive guide, we'll walk you through the process of securely storing and validating hashed passwords for admin logins in your web application.

Introduction

Admin authentication is a crucial part of many web applications. As a developer, you want to ensure that admin credentials are stored securely and validated accurately. Storing plain text passwords in your database is a major security risk. We'll guide you through the process of using password hashing to enhance security.

Step 1: Setting Up Your Development Environment

Before we dive into coding, let's make sure you have the right tools in place. Ensure you have:

• A code editor (e.g., Visual Studio Code).

• Node.js and npm (Node Package Manager) are installed on your system.

• A Firebase project is set up, as we'll be using Firestore for our database.

Step 2: Installing Dependencies

In your project directory, install the necessary dependencies, including Firebase and bcryptjs, by running the following commands:

bashCopy codenpm install firebase
npm install bcryptjs

Step 3: Creating Your Firestore Collection

Set up a Firestore collection to store admin credentials. You can do this via the Firebase Console or programmatically using the Firebase Admin SDK.

Step 4: Hashing Passwords

When creating an admin account or updating the password, use bcryptjs to hash the password. This adds a layer of security:

javascriptCopy codeconst bcrypt = require('bcryptjs');

// Hash the password before storing it in Firestore
const saltRounds = 10; // Number of salt rounds for bcrypt
const plainTextPassword = 'your_admin_password'; // Replace with the actual password
const hashedPassword = bcrypt.hashSync(plainTextPassword, saltRounds);

// Store the hashed password in Firestore
// (Implement this using Firebase Firestore SDK)

Step 5: Verifying Passwords

When an admin logs in, retrieve the hashed password from your database and compare it with the entered password using bcrypt.compare. This function securely compares the plain text password with the stored hash:

javascriptCopy codeconst isPasswordValid = bcrypt.compareSync(enteredPassword, storedHashedPassword);

if (isPasswordValid) {
  // Grant access
} else {
  // Deny access
}

Step 6: The Code in Action

The provided code demonstrates these concepts in action. When an admin tries to log in, the system retrieves the hashed password from the database and compares it with the entered password. If they match, access is granted; otherwise, access is denied.

Conclusion

Handling admin logins securely is vital for web application development. By using password hashing with bcrypt.js, you add a layer of protection to your admin credentials. As a fresh computer science graduate or someone with limited experience, this is a valuable skill to have when building secure web applications.

Remember, this is just one piece of the puzzle in web development. Continue to explore best practices and security measures to protect your applications and users effectively.

Stay curious, keep learning, and happy coding!

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This interactive guide provides a step-by-step approach to securely managing admin passwords in web applications, making it easier for readers to implement these crucial security practices.