AES-CTR for WebAssembly

import * as Zepar from "@hazae41/zepar";
import { Aes128Ctr128BEKey } from "@hazae41/zepar";
import { randomBytes } from "crypto";

// Wait for WASM to load
Zepar.initSyncBundledOnce()

// Random key
const key = randomBytes(16)

// Empty IV
const iv = new Uint8Array(16)

// Build a cipher from key and IV
const cipher = new Aes128Ctr128BEKey(key, iv)

// Byte arrays to encrypt
const hello = new TextEncoder().encode("Hello World")
const hello2 = new TextEncoder().encode("Hello World")

// Encrypt with counter = 0
cipher.apply_keystream(hello)

// Encrypt with counter = 1
cipher.apply_keystream(hello2)

// hello !== hello2
console.log(hello, hello2)