mirror of https://github.com/gchq/CyberChef.git
60 lines
1.4 KiB
JavaScript
60 lines
1.4 KiB
JavaScript
/**
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* @author Thomas Weißschuh [thomas@t-8ch.de]
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* @copyright Crown Copyright 2023
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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 Utils from "../Utils.mjs";
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import { toHex } from "../lib/Hex.mjs";
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/**
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* XOR Checksum operation
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*/
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class XORChecksum extends Operation {
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/**
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* XORChecksum constructor
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*/
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constructor() {
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super();
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this.name = "XOR Checksum";
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this.module = "Crypto";
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this.description = "XOR Checksum splits the input into blocks of a configurable size and performs the XOR operation on these blocks.";
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this.infoURL = "https://wikipedia.org/wiki/XOR";
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this.inputType = "ArrayBuffer";
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this.outputType = "string";
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this.args = [
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{
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name: "Blocksize",
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type: "number",
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value: 4
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},
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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 blocksize = args[0];
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input = new Uint8Array(input);
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const res = Array(blocksize);
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res.fill(0);
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for (const chunk of Utils.chunked(input, blocksize)) {
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for (let i = 0; i < blocksize; i++) {
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res[i] ^= chunk[i];
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}
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}
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return toHex(res, "");
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}
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}
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export default XORChecksum;
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