decrypt.js

const keys = {
  dev: "PUT_YOUR_DEV_ENCRYPTION_KEY",
  qa: "PUT_YOUR_QA_ENCRYPTION_KEY",
  prod: "PUT_YOUR_PROD_ENCRYPTION_KEY",
};

let currentKey = keys.dev;

function setEnvironment(env) {
  if (keys[env]) {
    currentKey = keys[env];
    console.log("Switched to environment:", env);
  }
}

function decryptPayload(encryptedBase64) {
  try {
    if (typeof CryptoJS === "undefined") {
      console.warn(
        "CryptoJS is not loaded. Put crypto-js.js next to decrypt.js and reload the extension.",
      );
      return encryptedBase64;
    }

    encryptedBase64 = encryptedBase64
      .trim()
      .replace(/^"(.*)"$/, "$1")
      .replace(/\\\//g, "/")
      .replace(/\\n/g, "")
      .replace(/\\r/g, "");

    const key = CryptoJS.SHA256(currentKey);
    const rawData = CryptoJS.enc.Base64.parse(encryptedBase64);

    const iv = CryptoJS.lib.WordArray.create(rawData.words.slice(0, 4));
    const cipherText = CryptoJS.lib.WordArray.create(
      rawData.words.slice(4),
      rawData.sigBytes - 16,
    );

    const decrypted = CryptoJS.AES.decrypt({ ciphertext: cipherText }, key, {
      iv,
      mode: CryptoJS.mode.CBC,
      padding: CryptoJS.pad.Pkcs7,
    });

    const text = decrypted.toString(CryptoJS.enc.Utf8);

    try {
      return JSON.parse(text);
    } catch {
      return text;
    }
  } catch (e) {
    console.warn("decryptPayload error:", e);
    return encryptedBase64;
  }
}

window.decryptPayload = decryptPayload;
window.setEnvironment = setEnvironment;