ls_crypto/demo.js

//test under node v6.11.1

const crypto = require("crypto");
import CryptoES from "crypto-es";
// const assert = require('assert');
const URLSafeBase64 = require("urlsafe-base64");

function encode_data(app_secret = "f381e66efc9611e6a8faf45c89a03281", data) {
  var datajson = JSON.stringify(data);
  var cryptkey = crypto
    .createHash("sha256")
    .update(app_secret, "utf8")
    .digest()
    .slice(0, 16);
  var iv = crypto.randomBytes(16);
  var encipher = crypto.createCipheriv("aes-128-cbc", cryptkey, iv);
  encipher.setAutoPadding((auto_padding = true));
  var encdata = Buffer.concat([
    encipher.update(datajson, "utf8"),
    encipher.final(),
  ]);
  var enc = Buffer.concat([iv, encdata]);
  return URLSafeBase64.encode(enc).toString("hex");
}

function decode_data(app_secret = "f381e66efc9611e6a8faf45c89a03281", enc) {
  var encdata = URLSafeBase64.decode(enc);
  var cryptkey = crypto
    .createHash("sha256")
    .update(app_secret, "utf8")
    .digest()
    .slice(0, 16);
  var iv = encdata.slice(0, 16);
  encdata = encdata.slice(16);
  var decipher = crypto.createDecipheriv("aes-128-cbc", cryptkey, iv);
  decipher.setAutoPadding((auto_padding = true));
  var datajson = Buffer.concat([
    decipher.update(encdata, "utf8"),
    decipher.final(),
  ]).toString("utf8");
  return JSON.parse(datajson);
}

// function run() {
//   var data = {
//     timestamp: Math.floor(new Date() / 1000),
//     user_id: 1,
//     img: "http://www.kangfuzi.com/logo.png",
//   };
//   var app_secret = "";
//   var enc = encode_data(app_secret, data);
//   //console.log(enc);
//   var data2 = decode_data(app_secret, enc);
//   //console.log(data2);
//   assert.deepEqual(data, data2);
//   // console.log(app_secret + " " + enc);
//   console.log("1111");
// }

// run();

module.exports.encode_data = encode_data;