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https://github.com/gchq/CyberChef.git
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462cda7f2e
Example: - Input: `q80BAAABAAAAAAAAA3d3dwdleGFtcGxlA2NvbQAAAQAB` - Operations: `From Base64` -> `Parse DNS Message` - Output: ``` ;; ->>HEADER<<- opcode: QUERY, status: NOERROR, id: 43981 ;; flags: rd; QUERY: 1, ANSWER: 0, AUTHORITY: 0, ADDITIONAL: 0 ;; QUESTION SECTION: ;www.example.com. IN A ```
55 lines
1.5 KiB
JavaScript
55 lines
1.5 KiB
JavaScript
/**
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* @author Minghang Chen [chen@minghang.dev]
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* @copyright Crown Copyright 2024
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* @license Apache-2.0
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*/
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import Operation from "../Operation.mjs";
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import OperationError from "../errors/OperationError.mjs";
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import { Message } from "@dnspect/dns-ts";
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/**
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* Parse DNS Message operation
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*/
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class ParseDNSMessage extends Operation {
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/**
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* ParseDNSMessage constructor
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*/
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constructor() {
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super();
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this.name = "Parse DNS Message";
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this.module = "Default";
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this.description = "Parse the DNS wireformat binary of a DNS message and return a text representation";
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this.infoURL = "https://en.wikipedia.org/wiki/Domain_Name_System#DNS_message_format";
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this.inputType = "ArrayBuffer";
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this.outputType = "string";
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this.args = [{
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"name": "Output format",
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"type": "option",
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"value": ["dig-like", "dns-json"]
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}];
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}
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/**
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* @param {ArrayBuffer} input
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* @param {Object[]} args
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* @returns {string}
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*/
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run(input, args) {
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const format = args[0];
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let msg;
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try {
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msg = Message.unpack(input);
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} catch (e) {
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throw new OperationError(`Malformed DNS message: ${e}`);
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}
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switch (format) {
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case "dig-like": return msg.toString();
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case "dns-json": return JSON.stringify(msg.toJsonObject(), null, 2);
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default: throw new OperationError(`Unsupported output format: ${format}`);
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}
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}
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}
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export default ParseDNSMessage;
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