crypto.js

const crypto = require("crypto");
const algorithm = "aes-256-cbc";
const iv = "%i!>Z+e"
const key = "7xFx-oli,Szlc%5D/k0&vq4b"

function scrypt (num, secret) {
    return new Promise((res, rec) => {
        return crypto.scrypt(secret, "salt", num, (err, key) => {
            if (err) return rec(err);

            return res(key);
        });
    });
}

function getIv () {
    return scrypt(8, iv).then((response) => response.toString("hex"));
}
function getKey () {
    return scrypt(32, key).then((response) => response);
}

function encryptText (toEncript) {

    let i, k;
    return getIv()
        .then(iv => {
            i = iv;

            return getKey()
        }).then(key => {
            k = key;

            const cipher = crypto.createCipheriv(algorithm, k, i);
            const encrypted = cipher.update(toEncript, "utf8", "hex") + cipher.final("hex");

            return encrypted;
        });
}

function decryptText (toDencript) {
    let i, k;

    return getIv()
        .then((res1) => {
            i = res1;

            return getKey()
        })
        .then((ae) => {
            k = ae;

            const decipher = crypto.createDecipheriv(algorithm, k, i);
            const encrypted = decipher.update(toDencript, "hex", "utf8") + decipher.final("utf8");

            return encrypted;
        })
        .catch((err) => {
            console.log("err: ", err);

            throw err;
        });
}

(async function () {
    const textToEncript = "enetito is very pretty to them girls troll mon troll mon long text";
    console.log('textToEncript: ', textToEncript);
    const encrypted = await encryptText(textToEncript);
    console.log('encrypted: ', encrypted);

    const textDecripted = await decryptText(encrypted)

    console.log('textDecripted: ', textDecripted);
})()