Simple plain text encryption/decryption with password, whic…

Simple plain text encryption/decryption with password, which works in any Browser and Node.js: ```js const bytesToString = (bytes) => new TextDecoder().decode(bytes); const stringToBytes = (str) => new TextEncoder().encode(str); const bytesToBase64 = (arr) => btoa(Array.from(arr, (b) => String.fromCharCode(b)).join("")); const base64ToBytes = (base64) => Uint8Array.from(atob(base64), (c) => c.charCodeAt(0)); export const getKey = async (password, salt) => { const bytes = stringToBytes(password); const initialKey = await crypto.subtle.importKey("raw", bytes, {name: "PBKDF2"}, false, ["deriveKey"]); return crypto.subtle.deriveKey( { name: "PBKDF2", salt, iterations: 100000, hash: "SHA-256" }, initialKey, { name: "AES-GCM", length: 256 }, false, ["encrypt", "decrypt"] ); }; export const encrypt = async (plaintext, password) => { const salt = crypto.getRandomValues(new Uint8Array(16)); const key = await getKey(password, salt); const iv = crypto.getRandomValues(new Uint8Array(12)); const contentBytes = stringToBytes(plaintext); const cipher = new Uint8Array(await crypto.subtle.encrypt({name: "AES-GCM", iv}, key, contentBytes)); const line = `${bytesToBase64(salt)}:${bytesToBase64(iv)}:${bytesToBase64(cipher)}`; const decrypted = await decrypt(line, password); if (decrypted !== plaintext) throw new Error('Test decoding failed.'); return line; }; export const decrypt = async (line, password) => { const split = line.split(':'); const encryptedData = {salt: split[0], iv: split[1], cipher: split[2]}; const salt = base64ToBytes(encryptedData.salt); const key = await getKey(password, salt); const iv = base64ToBytes(encryptedData.iv); const cipher = base64ToBytes(encryptedData.cipher); const contentBytes = new Uint8Array(await crypto.subtle.decrypt({name: "AES-GCM", iv}, key, cipher)); return bytesToString(contentBytes); }; ``` Usage: ```js await encrypt('ho ho ho', 'password') ```