getpassword.js explanation about the tls connection

[aimproxy]

Hi, I'm translating your code to Vala to use in (Home App)[https://github.com/manexim/home] for elementary OS, so we creating a library to translate ur code to Vala (libirobot)[https://github.com/manexim/libirobot].

I have some question about ur code, take a look below:

  const packet = 'f005efcc3b2900';
  var client = tls.connect(8883, host, {rejectUnauthorized: false, ciphers: 'AES128-SHA256'}, function () {
    client.write(new Buffer(packet, 'hex'));
  });

Here, nodejs etablish a TLS connection with cipher, whats is the value returned from tls.connect ?, ciphers should be AES128 or SHA256 ?, about client.write whats this function do? and Buffer(packet, 'hex') is to convert hex to bin?

[koalazak]

Hi, nice!

tls.connect returns a socket in where you can send bytes with write method. Cipher is 'AES128-SHA256' (RSA key exchange and AES encryption) it is suite. You can't choose one Or other. They works in combination. Buffer(packet, 'hex') creates a buffer using a hex string source.

the buffer contains bytes for a special packet in mqtt protocol http://docs.oasis-open.org/mqtt/mqtt/v3.1.1/mqtt-v3.1.1.html http://www.steves-internet-guide.com/mqtt-protocol-messages-overview/

let me know if you need something else

[aimproxy]

Thanks

[aimproxy]

@koalazak Hi again, just one more thing, a question for a newbie programmer. There is a buffer in C like on NodeJS? and the variable packet is a hex string right? and that hex string will be encoded to a byte array right?