How to encrypt and decrypt text in javascript client side with AES CFB 256

// aes.js import CryptoJS from 'crypto-js'; export function encryptText(keyStr, text) { const private_key = CryptoJS.SHA256(keyStr).toString(CryptoJS.enc.Latin1); const rem = text.length % 16; const padded = CryptoJS.enc.Latin1.parse(text.padEnd(text.length + (16 - rem), '\0')); const iv = CryptoJS.lib.WordArray.random(16); const cipher = CryptoJS.AES.encrypt(padded, CryptoJS.enc.Latin1.parse(private_key), { iv: iv, mode: CryptoJS.mode.CFB, padding: CryptoJS.pad.NoPadding, segmentSize: 128, }); const ciphertext = iv.concat(cipher.ciphertext); return ciphertext.toString(CryptoJS.enc.Base64); } export const decryptText = (keyStr, text) => { const private_key = CryptoJS.SHA256(keyStr).toString(CryptoJS.enc.Latin1); const encrypted = CryptoJS.enc.Base64.parse(text); const iv = encrypted.clone().words.slice(0, 4); const ciphertext = encrypted.clone().words.slice(4); const cipherParams = { ciphertext: CryptoJS.lib.WordArray.create(ciphertext), }; const decrypted = CryptoJS.AES.decrypt(cipherParams, CryptoJS.enc.Latin1.parse(private_key), { iv: CryptoJS.lib.WordArray.create(iv), mode: CryptoJS.mode.CFB, padding: CryptoJS.pad.ZeroPadding, segmentSize: 128, }); const decryptedText = CryptoJS.enc.Utf8.stringify(decrypted); return decryptedText; };