citi-hub-session-engine/functions/decrypt.js

Module for authentication methods for CITI hub

const { publicEncrypt, createDecipheriv, privateDecrypt } = require("crypto");
const { logger } = require("../utils/Logger");

const decrypt = (encryptedData, privateKey, publicKey, aesKeyH, ivH) => {
  try {
    logger.info(`Initiating Decrypt`);

    const aesKey = Buffer.from(aesKeyH, "hex");
    const iv = Buffer.from(ivH, "hex");

    logger.info("aesKey", aesKey);
    logger.info("iv", iv);

    // Encriptar la clave AES con la llave pública RSA
    const encryptedAesKey = publicEncrypt(publicKey, aesKey);
    logger.info("encryptedAesKey", encryptedAesKey);

    logger.info("Encrypted Data:", encryptedData);
    logger.info("Encrypted AES Key:", encryptedAesKey.toString("base64"));
    logger.info("IV:", iv.toString("base64"));

    const decryptedAesKey = privateDecrypt(privateKey, encryptedAesKey);

    // Desencriptar los datos con AES
    const decipher = createDecipheriv("aes-256-cbc", decryptedAesKey, iv);
    let decryptedData = decipher.update(encryptedData, "base64", "utf8");
    decryptedData += decipher.final("utf8");

    logger.info(`Decrypted Data: ${decryptedData}`);
    return JSON.parse(decryptedData);
  } catch (e) {
    logger.error(`An error occurred while decrypting the data :: ${e}`);
    return null;
  }
};

module.exports = decrypt;