node-lox-ws-api/lib/Auth/Hash.js

Web Socket Loxone™ API

const crypto = require('crypto');

var Hash = function (host, username, password, connection, api) {
    this._host = host;
    this._username = username;
    this._password = password;
    this._connection = connection;
    this._api = api;
    this._hmac_hash = '';
};

Hash.prototype.__proto__ = require('events').EventEmitter.prototype;

Hash.prototype.authorize = function() {
    this._register_getkey_response();
    this._connection.send('jdev/sys/getkey');
};

Hash.prototype.prepare_control_command = function(control, command) {
    var prefix = 'jdev/sps/io/';

    if (this._hmac_hash){
        prefix = 'jdev/sps/ios/'+this._hmac_hash+'/';
    }

    return prefix + control + '/' + command;
};

Hash.prototype.prepare_secure_command = function(command) {
    return command;
}

Hash.prototype._register_getkey_response = function() {
    var that = this;
    this._api.command_chain.push({
        'control': /^j?dev\/sys\/getkey$/,
        'callback': function(loxone_message) {
            var key = new Buffer(loxone_message.value, 'hex').toString('utf8');
            var hmac = crypto.createHmac('sha1', key);
            var hmac_hash = hmac.update(that._username+':'+that._password).digest('hex');
            that._hmac_hash = hmac_hash;
            that._register_authenticate_response();
            that._connection.send('authenticate/'+hmac_hash);
        },
        'onetime': true,
    });
};

Hash.prototype._register_authenticate_response = function() {
    var that = this;
    this._api.command_chain.push({
        'control': /^authenticate\//,
        'callback': function(loxone_message) {
            if (loxone_message.code === '200'){
                that.emit('authorized');
            }else{
                that.emit('auth_failed', loxone_message);
            }
        },
        'onetime': true,
    });
};

module.exports = Hash;