mirror of https://github.com/gchq/CyberChef.git
61 lines
1.9 KiB
JavaScript
61 lines
1.9 KiB
JavaScript
/**
|
|
* @author n1474335 [n1474335@gmail.com]
|
|
* @copyright Crown Copyright 2017
|
|
* @license Apache-2.0
|
|
*/
|
|
|
|
import Operation from "../Operation";
|
|
|
|
/**
|
|
* Decode NetBIOS Name operation
|
|
*/
|
|
class DecodeNetBIOSName extends Operation {
|
|
|
|
/**
|
|
* DecodeNetBIOSName constructor
|
|
*/
|
|
constructor() {
|
|
super();
|
|
|
|
this.name = "Decode NetBIOS Name";
|
|
this.module = "Default";
|
|
this.description = "NetBIOS names as seen across the client interface to NetBIOS are exactly 16 bytes long. Within the NetBIOS-over-TCP protocols, a longer representation is used.<br><br>There are two levels of encoding. The first level maps a NetBIOS name into a domain system name. The second level maps the domain system name into the 'compressed' representation required for interaction with the domain name system.<br><br>This operation decodes the first level of encoding. See RFC 1001 for full details.";
|
|
this.infoURL = "https://wikipedia.org/wiki/NetBIOS";
|
|
this.inputType = "byteArray";
|
|
this.outputType = "byteArray";
|
|
this.args = [
|
|
{
|
|
"name": "Offset",
|
|
"type": "number",
|
|
"value": 65
|
|
}
|
|
];
|
|
}
|
|
|
|
/**
|
|
* @param {byteArray} input
|
|
* @param {Object[]} args
|
|
* @returns {byteArray}
|
|
*/
|
|
run(input, args) {
|
|
const output = [],
|
|
offset = args[0];
|
|
|
|
if (input.length <= 32 && (input.length % 2) === 0) {
|
|
for (let i = 0; i < input.length; i += 2) {
|
|
output.push((((input[i] & 0xff) - offset) << 4) |
|
|
(((input[i + 1] & 0xff) - offset) & 0xf));
|
|
}
|
|
for (let i = output.length - 1; i > 0; i--) {
|
|
if (output[i] === 32) output.splice(i, i);
|
|
else break;
|
|
}
|
|
}
|
|
|
|
return output;
|
|
}
|
|
|
|
}
|
|
|
|
export default DecodeNetBIOSName;
|