import CryptoJS from 'crypto-js';

// 默认的 KEY 与 iv 如果没有给
const KEY = CryptoJS.enc.Utf8.parse('7A57A5B723894B84'); //十六位十六进制数作为密钥
const IV = CryptoJS.enc.Utf8.parse('360DA3SE68A47895'); //十六位十六进制数作为密钥

/**
 * AES加密 ：字符串 key iv  返回base64
 */
export function EncryptAES(word, keyStr, ivStr) {
  let key = KEY;
  let iv = IV;
  if (keyStr) {
    key = CryptoJS.enc.Utf8.parse(keyStr);
    iv = CryptoJS.enc.Utf8.parse(ivStr);
  }
  let srcs = CryptoJS.enc.Utf8.parse(word);
  var encrypted = CryptoJS.AES.encrypt(srcs, key, {
    iv: iv,
    mode: CryptoJS.mode.CBC,
    padding: CryptoJS.pad.ZeroPadding,
  });
  return CryptoJS.enc.Base64.stringify(encrypted.ciphertext);
}

/**
 * AES 解密 ：字符串 key iv  返回base64
 *
 * @return {string}
 */
export function DecryptAES(word, keyStr, ivStr) {
  let key = KEY;
  let iv = IV;

  if (keyStr) {
    key = CryptoJS.enc.Utf8.parse(keyStr);
    iv = CryptoJS.enc.Utf8.parse(ivStr);
  }

  let base64 = CryptoJS.enc.Base64.parse(word);
  let src = CryptoJS.enc.Base64.stringify(base64);

  let decrypt = CryptoJS.AES.decrypt(src, key, {
    iv: iv,
    mode: CryptoJS.mode.CBC,
    padding: CryptoJS.pad.ZeroPadding,
  });

  let decryptedStr = decrypt.toString(CryptoJS.enc.Utf8);
  return decryptedStr.toString();
}