Node crypto proxy

README.md

#SHA256

#AES256

#Base64

AES256.js

var crypto = require('crypto');
var SHA256 = require('./SHA256.js');
var Base64 = require('./Base64.js');
var _key = SHA256.encode('default key');
module.exports = {
  encode: function (data, key) {
    if (arguments.length < 2) key = _key;
    var cipher = crypto.createCipher('aes-256-ctr', key);    // Cipher 객체 생성
    var crypted = Buffer.concat([cipher.update(new Buffer(data)), cipher.final()]);
    return Base64.encode(crypted);
  },
  decode: function (base64, key) {
    if (arguments.length < 2) key = _key;
    var decipher = crypto.createDecipher('aes-256-ctr', key);
    return Buffer.concat([decipher.update(Base64.decode(base64)), decipher.final()]);
  }
};

Base64.js

var crypto = require('crypto');

function encode(data) {
  var ret = new Buffer(data || '').toString('base64');
  return ret.replace(/\+/g, '-').replace(/\//g, '_').replace(/=+$/, '');
}

module.exports = {
  encode: encode,
  decode: function (code) {
    code = code.replace(/-/g, '+').replace(/_/g, '/');
    return new Buffer(code || '', 'base64');
  },
  random: function (byte) {
    return encode(crypto.randomBytes(byte));
  }
};

SHA256.js

var crypto = require('crypto');
var Base64 = require('./Base64.js');
module.exports = {
  encode: function (data) {
    var hash = crypto.createHash('sha256').update(data).digest();
    return Base64.encode(hash);
  }
};