This repo demostrates how to encypt your data using AES and decrypt it using NodeJS crypto-js library. If you are looking for PHP port see https://zeitwesentech.com/blog/?p=521 (I am not the author)
You can find the library version here https://github.com/kakopappa/arduino-esp8266-aes-lib
Complete article is here: (I am not the author) https://primalcortex.wordpress.com/2016/06/17/esp8266-logging-data-in-a-backend-aes-and-crypto-js/.
I have fixed few bugs related ESP8266 and combined it with AES and Base64
How to use this:
- Clone the github repo.
- open aes_encryption.ino in Arduino
- Flash
- Copy the iv, encrypted data and replace the esp8266_msg, esp8266_iv in the javascript code below.
Here is the NodeJS Code.
//npm install --save-dev crypto-js
var CryptoJS = require("crypto-js");
var esp8266_msg = 'IqszviDrXw5juapvVrQ2Eh/H3TqBsPkSOYY25hOQzJck+ZWIg2QsgBqYQv6lWHcdOclvVLOSOouk3PmGfIXv//cURM8UBJkKF83fPawwuxg=';
var esp8266_iv = 'Cqkbb7OxPGoXhk70DjGYjw==';
// The AES encryption/decryption key to be used.
var AESKey = '2B7E151628AED2A6ABF7158809CF4F3C';
var plain_iv = new Buffer( esp8266_iv , 'base64').toString('hex');
var iv = CryptoJS.enc.Hex.parse( plain_iv );
var key= CryptoJS.enc.Hex.parse( AESKey );
console.log("Let's ");
// Decrypt
var bytes = CryptoJS.AES.decrypt( esp8266_msg, key , { iv: iv} );
var plaintext = bytes.toString(CryptoJS.enc.Base64);
var decoded_b64msg = new Buffer(plaintext , 'base64').toString('ascii');
var decoded_msg = new Buffer( decoded_b64msg , 'base64').toString('ascii');
console.log("Decryptedage: ", decoded_msg);
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