Password hashing with bcrypt in Node.js - Mini Project: Build & Apply

Password hashing with bcrypt in Node.js

📖 Scenario: You are building a simple user registration system. To keep user passwords safe, you need to hash them before saving.

🎯 Goal: Create a Node.js script that uses bcrypt to hash a plain password securely.

📋 What You'll Learn

Create a variable with the plain password string exactly as specified

Set a salt rounds variable for bcrypt configuration

Use bcrypt to hash the password with the salt rounds

Export or log the hashed password variable

💡 Why This Matters

🌍 Real World

Password hashing is essential for protecting user credentials in web applications to prevent password theft.

💼 Career

Understanding bcrypt hashing is a key skill for backend developers working on authentication and security.

1

Set up the plain password variable

Create a variable called plainPassword and set it to the string "MySecret123".

Node.js

// Create a variable called plainPassword with the value "MySecret123"
// Your code here

Need a hint?

Use const to declare the variable and assign the exact string.

2

Set the salt rounds for bcrypt

Create a variable called saltRounds and set it to the number 10.

Node.js

const plainPassword = "MySecret123";
// Create a variable called saltRounds and set it to 10
// Your code here

Need a hint?

Use const and assign the number 10 exactly.

3

Hash the password using bcrypt

Import bcrypt at the top. Then create an async function called hashPassword that uses bcrypt.hash with plainPassword and saltRounds. Inside the function, assign the hashed result to a variable called hashedPassword and return it.

Node.js

const plainPassword = "MySecret123";
const saltRounds = 10;

// Import bcrypt
// Create async function hashPassword
// Use bcrypt.hash with plainPassword and saltRounds
// Assign result to hashedPassword and return it
// Your code here

Need a hint?

Use import bcrypt from 'bcrypt'; and an async function with await bcrypt.hash() and return hashedPassword;.

4

Export the hashed password function

Add export default hashPassword; at the end of the file to export the hashPassword function.

Node.js

import bcrypt from 'bcrypt';

const plainPassword = "MySecret123";
const saltRounds = 10;

async function hashPassword() {
    const hashedPassword = await bcrypt.hash(plainPassword, saltRounds);
    return hashedPassword;
}

// Export the hashPassword function as default
// Your code here

Need a hint?

Use export default followed by the function name.