CryptoJS test with sha1

<!DOCTYPE html>
<html>

<head>
  <script data-require="jquery@3.1.1" data-semver="3.1.1" src="https://ajax.googleapis.com/ajax/libs/jquery/3.1.1/jquery.min.js"></script>
  <script src="https://cdnjs.cloudflare.com/ajax/libs/crypto-js/3.1.9-1/crypto-js.js"></script>
  <link rel="stylesheet" href="style.css" />
  <script src="script.js"></script>
</head>

<body>
  <h1>CryptoJS</h1>
  <h4>Two-way AES encryption example using a single key and initialization vector.</h4>

  <fieldset>
    <div>
      <label>Plain Text</label>
      <input class="long-input" id="textInput" type="text" />
    </div>
    <div>
      <label>Password</label>
      <input id="passwordInput" type="text" />
      <label>SHA1 Hash:</label><span id="sha1Hash"></span>
    </div>
    <button onclick="encrypt()">Test</button>

  </fieldset>

  <div>
    <label>Key:</label> <span id="key">?</span>
  </div>
  <div>
    <label>Cipher Text:</label> <span id="cipherText">?</span>
  </div>
  <div>
    <label>Decrypted Cipher Text:</label> <span id="decrypted">?</span>
  </div>
</body>

</html>

// Code goes here

$(document).ready(initialize);

function initialize() {
  $('#textInput').val('Enter Some Text Here');
  $('#passwordInput').val('12345678');
}

function encrypt() {
  var plainText = $('#textInput').val();
  var password = $('#passwordInput').val();
  
  var passwordBytes = CryptoJS.enc.Utf16LE.parse(password);

  var sha1Hash = CryptoJS.SHA1(passwordBytes);
  
  var sha1HashToBase64 = sha1Hash.toString(CryptoJS.enc.Base64);

  // we are getting only the first 8 chars for actual key generation
  sha1HashToBase64Short = sha1HashToBase64.substring(0,8);

  var aesKey = CryptoJS.enc.Utf16.parse(sha1HashToBase64Short);
  var aesIv = aesKey;

 //Note that we are being lazy and the encryption key itself
 //is used as the initialization vector for AES
  var x = CryptoJS.AES.encrypt(plainText, aesKey, {
    iv: aesIv,
    mode: CryptoJS.mode.CBC,
    padding: CryptoJS.pad.Pkcs7
  });

  // cryptHex will contain the cipher text in base64
  var cryptHex = x.toString();

  var y = CryptoJS.AES.decrypt(cryptHex, aesKey, {
    iv: aesIv
  });

  ytext = y.toString(CryptoJS.enc.Utf8)

  $('#sha1Hash').html(sha1HashToBase64);
  $('#key').html(aesKey.toString());
  $('#cipherText').html(cryptHex);
  $('#decrypted').html(ytext);

}

/* Styles go here */

label{
  font-weight:bolder;
}

fieldset{
  margin-bottom:1em;
}

input.long-input {
  width: 100%;
}