Authentication is a very important aspect of web development, and as beginners, it can seem like a daunting task. In this brief tutorial, we would learn how to hash passwords during user signup/registration.
Pre-requisites
- Basic knowledge of JavaScript.
- expressJS
- bcrypt package
Create a folder on your local machine, and create a file app.js. we would put every code in this single file.
const express = require("express");
const bcrypt = require("bcrypt")
const app = express(); // init express app
app.listen(5000, () => {
console.log('Server listening on port 5000...')
})
We wouldn't be using a database in this tutorial but a array to pass the lesson across. We would create an async-await function for the password hash.
const express = require("express");
const bcrypt = require("bcrypt")
const app = express(); // init express app
app.use(express.json()) // accepting json body-parsers
const users = [] // we would be using as local storage
// creating a function for the password hash
const hashPassword = async (password) => {
try {
const salt = await bcrypt.genSalt();
const hashedPassword = await bcrypt.hash(password, salt);
return hashedPassword;
} catch (error) {
console.error(error);
}
};
// Server up and running
app.listen(5000, () => {
console.log('Server listening on port 5000...')
})
Now, it is time to use the password hash function we created above to hash passwords. And the empty users array as our local storage.
const express = require("express");
const bcrypt = require("bcrypt")
const app = express(); // init express app
app.use(express.json()) // accepting json body-parsers
const users = [] // we would be using as local storage
// creating a function for the password hash
const hashPassword = async (password) => {
try {
const salt = await bcrypt.genSalt();
const hashedPassword = await bcrypt.hash(password, salt);
return hashedPassword;
} catch (error) {
console.error(error);
}
};
// sending a post request to create a user
app.post(async (req, res) => {
const passwordHash = await hashPassword(req.body.password)
try {
const user = {username: req.body.username, password:
passwordHash}
users.push(user);
res.status(201).json(user);
/*
would return the user if you are using postman,
you can as well console.log(user) to see the result in the terminal
*/
} catch (error){
console.error(error)
}
})
// Server up and running
app.listen(5000, () => {
console.log('Server listening on port 5000...')
})
I believe things worked out on your own end, while following this tutorial..
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