crypto/crypto/ CryptoJS

See here

Example

You can choose only what you need.

<script src="aes.js"></script>
<script src="sha512.js"></script>
<script src="pbkdf2.js"></script>
...

const enc = (passphrase,plaintext,iterations=2048) => {
  const salt = CryptoJS.lib.WordArray.random(256)
  const iv = CryptoJS.lib.WordArray.random(16)
  const key = CryptoJS.PBKDF2(passphrase, salt, { hasher: CryptoJS.algo.SHA512, keySize: 64/8, iterations})
  const encrypted = CryptoJS.AES.encrypt(plaintext, key, { iv })
  const ciphertext = encrypted.toString()
  const obj = { ciphertext, salt: salt.toString(CryptoJS.enc.Hex), 
    iv: iv.toString(CryptoJS.enc.Hex), iterations }
  return obj
}
const decrypt = (passphrase,obj) => {
  const { ciphertext, iterations } = obj
  const salt = CryptoJS.enc.Hex.parse(obj.salt)
  const iv = CryptoJS.enc.Hex.parse(obj.iv)
  const key = CryptoJS.PBKDF2(passphrase, salt, { hasher: CryptoJS.algo.SHA512, keySize: 64/8, iterations})
  const decrypted = CryptoJS.AES.decrypt(ciphertext, key, { iv })
  return decrypted.toString(CryptoJS.enc.Utf8)
}