1const Cryptr = require('cryptr');
2const cryptr = new Cryptr('ReallySecretKey');
3
4const encryptedString = cryptr.encrypt('Popcorn');
5const decryptedString = cryptr.decrypt(encryptedString);
6
7console.log(encryptedString);

1function getMessageEncoding() {
2  const messageBox = document.querySelector(".rsa-oaep #message");
3  let message = messageBox.value;
4  let enc = new TextEncoder();
5  return enc.encode(message);
6}
7
8function encryptMessage(publicKey) {
9  let encoded = getMessageEncoding();
10  return window.crypto.subtle.encrypt(
11    {
12      name: "RSA-OAEP"
13    },
14    publicKey,
15    encoded
16  );
17}