JavaScript – Get SHA-1 Hash of a String

This post shows you how to get SHA-1 hash of a string using JavaScript.  To do this, we need to use thirty party SHA-1 JS libraries such as js-sha1.

1. Install js-sha1 library

• Download the library manually:

You can download it on its github repository.

• Via bower:

bower install js-sha1

• Via node.js/npm:

npm install js-sha1

2. Include js-sha1 library in your application

<script src="path/to/sha1.js"></script>

or if you use node.js

sha1 = require('js-sha1');

or if you use AMD

require(['path/to/sha1.js'], function(sha1) {
   // CODE GOES HERE
});

3. Use js-sha1 library

• Way 1:

var myMessage = 'Message to hash';

// hash the message
var hashed = sha1(myMessage);

console.log(hashed);

• Way 2:

var myMessage = 'Message to hash';

// hash the message
var hash = sha1.create();
hash.update(myMessage);
var hashed = hash.hex();
console.log(hashed);

Output:

ad8b1ef19620cf94a1c0c9d6c87e7d1b2bca2584