# AES

By [Celo](https://paragraph.com/@celo-2) · 2023-07-24

---

    <!DOCTYPE html>
    <html>
    <head>
        <title>Web-based Encryption Tool</title>
        <script src="https://cdnjs.cloudflare.com/ajax/libs/crypto-js/3.1.9-1/crypto-js.min.js"></script>
    </head>
    <body>
        <h1>Web-based Encryption Tool</h1>
        <label for="plaintext">Plaintext:</label>
        <br>
        <textarea id="plaintext" rows="5" cols="50"></textarea>
        <br>
        <label for="key">Encryption Key:</label>
        <br>
        <input type="text" id="key">
        <br>
        <button onclick="encrypt()">Encrypt</button>
        <button onclick="decrypt()">Decrypt</button>
        <br>
        <label for="ciphertext">Ciphertext:</label>
        <br>
        <textarea id="ciphertext" rows="5" cols="50"></textarea>
    
        <script>
            function encrypt() {
                var plaintext = document.getElementById("plaintext").value;
                var key = document.getElementById("key").value;
                
                // Encrypt using AES
                var ciphertext = CryptoJS.AES.encrypt(plaintext, key).toString();
                
                document.getElementById("ciphertext").value = ciphertext;
            }
    
            function decrypt() {
                var ciphertext = document.getElementById("ciphertext").value;
                var key = document.getElementById("key").value;
    
                // Decrypt using AES
                var bytes = CryptoJS.AES.decrypt(ciphertext, key);
                var plaintext = bytes.toString(CryptoJS.enc.Utf8);
    
                document.getElementById("plaintext").value = plaintext;
            }
        </script>
    </body>
    </html>

---

*Originally published on [Celo](https://paragraph.com/@celo-2/aes)*
