Plain text encryption and decryption

A very simple module which provides robust implementation for plain text encryption and decryption using a password. Works in Browser and Node.js.

• Generates random password salt and IV (Initialization Vector) for each encryption and stores them in the resulting cipher prepended as a header.
• Uses AES-GCM algorithms from the WebCrypto API in the Browser and crypto module in Node.js.
• To generate a key from a password, uses PBKDF2 algorithm with SHA-256 hash function. A random salt is generated for each key derivation and then SHA-256 hash is iterated 100,000 times.

Usage

Browser (JsDlivr CDN, ESM.sh CDN):

<script type="module">
  import { encrypt, decrypt } from "//cdn.jsdelivr.net/npm/encrypt-decrypt-text";

  const text = 'ho-ho-ho';
  const password = 'santa';
  const cipher = await encrypt(text, password);
  const plaintext = await decrypt(cipher, password);
  
  document.body.innerHTML = `
    <pre>
      <code>
        Encrypted: ${cipher}
        Decrypted: ${plaintext}
      </code>
    </pre>`;
</script>

With NPM:

import { encrypt, decrypt } from 'encrypt-decrypt-text';

const encrypted = await encrypt('Hello World', 'password');
const decrypted = await decrypt(encrypted, 'password');

Also supports binary data as Uint8Array:

import { encryptBinary, decryptBinary } from 'encrypt-decrypt-text';

const plaintext = new Uint8Array([1, 2, 3, 4, 5]);
const encrypted = await encryptBinary(plaintext, 'password');
const decrypted = await decryptBinary(encrypted, 'password');