CyberChef/src/core/operations/ParseUDP.mjs

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/**
* @author h345983745 []
* @copyright Crown Copyright 2019
* @license Apache-2.0
*/
import Operation from "../Operation.mjs";
import Stream from "../lib/Stream.mjs";
import {toHex} from "../lib/Hex.mjs";
import OperationError from "../errors/OperationError.mjs";
/**
* Parse UDP operation
*/
class ParseUDP extends Operation {
/**
* ParseUDP constructor
*/
constructor() {
super();
this.name = "Parse UDP";
this.module = "Default";
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this.description = "Parses a UDP header and payload (if present).";
this.infoURL = "https://wikipedia.org/wiki/User_Datagram_Protocol";
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this.inputType = "ArrayBuffer";
this.outputType = "json";
this.presentType = "html";
this.args = [];
}
/**
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* @param {ArrayBuffer} input
* @returns {Object}
*/
run(input, args) {
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if (input.byteLength < 8) {
throw new OperationError("Need 8 bytes for a UDP Header");
}
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const s = new Stream(new Uint8Array(input));
// Parse Header
const UDPPacket = {
"Source port": s.readInt(2),
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"Destination port": s.readInt(2),
"Length": s.readInt(2),
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"Checksum": toHex(s.getBytes(2), "")
};
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// Parse data if present
if (s.hasMore()) {
UDPPacket.Data = toHex(s.getBytes(UDPPacket.Length - 8), "");
}
return UDPPacket;
}
/**
* Displays the UDP Packet in a table style
* @param {Object} data
* @returns {html}
*/
present(data) {
const html = [];
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html.push("<table class='table table-hover table-sm table-bordered table-nonfluid' style='table-layout: fixed'>");
html.push("<tr>");
html.push("<th>Field</th>");
html.push("<th>Value</th>");
html.push("</tr>");
for (const key in data) {
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html.push("<tr>");
html.push("<td style=\"word-wrap:break-word\">" + key + "</td>");
html.push("<td>" + data[key] + "</td>");
html.push("</tr>");
}
html.push("</table>");
return html.join("");
}
}
export default ParseUDP;