Encrypt string in PHP and decrypt in Node.js

Question

I am sending data through insecure connection between Apache and Node.js servers. I need to encrypt data in PHP and decrypt in Node.js. I\'ve spent 2 days trying to get it t

Answer 1

This is codeiginiter framework default decryption equivalent js script (aes128cbc), hope this will help someone.

 let crypto = require("crypto");
 let secret = 'xxxxxxxxxxxxxxxxxxxx';

 // ikm is initial keying material
 var hkdf = function (hashAlg, salt, ikm) {
  this.hashAlg = hashAlg;

  // create the hash alg to see if it exists and get its length
  var hash = crypto.createHash(this.hashAlg);
  this.hashLength = hash.digest().length;
  this.salt = salt || new Buffer(this.hashLength).fill(0).toString();
  this.ikm = ikm;

  // now we compute the PRK
  var hmac = crypto.createHmac(this.hashAlg, this.salt);
  hmac.update(this.ikm);
  this.prk = hmac.digest();
};

hkdf.prototype = {
derive: function(info, size, cb) {
  var prev = new Buffer(0);
  var output;
  var buffers = [];
  var num_blocks = Math.ceil(size / this.hashLength);
  info = new Buffer(info);

  for (var i=0; i