Learn to Protect Yourself - Basic Offline Encryption Tool - Javascript Tutorial

Repository

https://github.com/blws/text-encrypt

About text-encrypt

Offline minimal encryption tool and key generator.
Website: https://blws.github.io/text-encrypt

Technology Stack

Javascript, html, css

Roadmap

This is standalone offline text encryptor and key generator.
There is no roadmap, because it simply works.

New Features

1 - Basic Layout

<!DOCTYPE html>
<html lang="en">
<head>
    <title>Crypt</title>
    <meta charset="utf-8">
    <meta name="viewport" content="width=device-width, initial-scale=1">
    <style>
        * {margin: 0 auto;padding: 0;}
        .w1 {width: 100%;}
        .w2 {width: 50%;float: left;}
        .h1 {height: 300px;}
    </style>
</head>
<body>
    <input id="pass" placeholder="strong password" class="w2" type="text"></input>
    <label> Length: </label>
    <input id="limit" type="text" value="8" style="width:36px;"></input>
    <button onclick="generate()">Generate</button>
    <br>
    <textarea id="dtext" placeholder=" decrypted text" class="w1 h1"></textarea>
    <br>
    <button class="w2" onclick="enc()">encrypt</button>
    <button class="w2" onclick="dec()">decrypt</button>
    <br>
    <textarea id="etext" placeholder=" encrypted text" class="w1 h1"></textarea>
</body>
</html>

https://github.com/blws/text-encrypt/blob/master/index.html#L1
https://github.com/blws/text-encrypt/blob/master/index.html#L2408

2 - Generate Password or choose your own

//generate key / password
function generate() {
            var text = "";
            var possible = "ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789";
            var limit = parseInt(document.getElementById("limit").value);
            for (var i = 0; i < limit; i++)
                text += possible.charAt(Math.floor(Math.random() * possible.length));
            document.getElementById("pass").value = text;
        }

https://github.com/blws/text-encrypt/blob/master/index.html#L2442

3 - Encrypt text

//encrypt text
//hashing password / key with SHA256
//encrypting - AES
function enc() {
    var pass = document.getElementById("pass").value;
    var passHash = CryptoJS.SHA256(pass).toString();
    var dtext = document.getElementById("dtext").value; //.replace(/(?:\r\n|\r|\n)/g, '');
    document.getElementById("etext").value =
        CryptoJS.AES.encrypt(dtext, passHash).toString();
}

https://github.com/blws/text-encrypt/blob/master/index.html#L2419
4 - Decrypt text

//decrypt text
//hashing password / key with SHA256
//decrypting - AES
function dec() {
    var pass = document.getElementById("pass").value;
    var passHash = CryptoJS.SHA256(pass).toString();
    var etext = document.getElementById("etext").value;
    document.getElementById("dtext").value =
        CryptoJS.AES.decrypt(etext, passHash)
        .toString(CryptoJS.enc.Utf8);
}

https://github.com/blws/text-encrypt/blob/master/index.html#L2430

GitHub Account

https://github.com/blws

Thank you for your contribution. What you are doing is just storing contents of https://cdnjs.cloudflare.com/ajax/libs/crypto-js/3.1.9-1/crypto-js.min.js in the HTML File and then calling those functions from the javaScript. As of now I am not seeing any uniqueness for this because anyone can call those functions and get the Encrypted text.

This can be enhanced greatly if you create a Windows Application and then encrypt password and save locally.

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