Crypto-Aes

Cross Platform SHA-256 bit AES Encryption - Decryption

Project contains the implementation SHA-256 bit AES encryption which works on stated platforms only. Easy use and implementation.

Platforms:

• iOS ( not tested yet)

• Android

• Windows (C#). ( not tested yet )

• Node.js

• Web

Android Side

Just added Crypto.java file into your project and then add these functions.

Usage

//debug mode on
Crypto.DEBUG_LOG_ENABLED = true;

//key string must be max 32 char
String key = "0k8j7h6g5f4d3s2ak8j7h6g5f4d3s2a";

//iv string must be max 16 char
String iv = "0k8j7h6g5f4d3s2a";

//message string must be utf-8
String message = "hello world!!!";

//ecnrypted string
String encrypted = Crypto.encrypts(message,key,iv);

Log.d("Crypto",encrypted);

//decrypted string
String decrypted = Crypto.decrypts(encrypted,key,iv);

Log.d("Crypto",decrypted);

Web Side

Must be included cryptojs.js file into your project.

Functions

function getBytes(e){
  var bytes = [];
  for (var i = 0; i < e.length; ++i) {
    bytes.push(e.charCodeAt(i));
  }
  return bytes;
}

function getHex(e){
  return e.map(function(byte) {
    return ('0' + (byte & 0xFF).toString(16)).slice(-2);
  }).join('');
}

function hash(e){
  return CryptoJS.SHA256(e);
}

Usage

var message = "hello world!!!";
var iv = "0k8j7h6g5f4d3s2a";
var key = "0k8j7h6g5f4d3s2ak8j7h6g5f4d3s2a";


var iv1 = CryptoJS.enc.Hex.parse(getHex(getBytes(iv)));

console.log(iv1);

var cipher = CryptoJS.AES.encrypt(message, hash(key), {
    iv: iv1,
    mode: CryptoJS.mode.CBC,
    keySize: 256 / 32,
    padding: CryptoJS.pad.Pkcs7
});


var encrypted64 = cipher.ciphertext.toString(CryptoJS.enc.Base64);
console.log(encrypted64);

//decrypt
var bytes  = CryptoJS.AES.decrypt(encrypted64.toString(), hash(key), {
      iv: iv1,
      mode: CryptoJS.mode.CBC,
      keySize: 256 / 32,
      padding: CryptoJS.pad.Pkcs7
});

var plaintext = bytes.toString(CryptoJS.enc.Utf8);

console.log(plaintext);

Node.js Side

npm install cryptoaes

Usage

var Crypto = require("cryptoaes");

var message = "hello world!!!";
var iv = "0k8j7h6g5f4d3s2a";
var key = "0k8j7h6g5f4d3s2ak8j7h6g5f4d3s2a";

var r = Crypto.encrypts(message,key,iv);
console.log(r);
var r = Crypto.decrypts(r,key,iv);
console.log(r);

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