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Merge pull request #25 from t-8ch/checksum/xor

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Add "XOR Checksum" operation
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Autumn 2023-12-21 22:31:48 +00:00 • committed by GitHub
commit f47dda375f
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3 changed files with 150 additions and 2 deletions
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3
src/core/config/Categories.json
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@ -423,7 +423,8 @@
"CRC-8 Checksum",
"CRC-16 Checksum",
"CRC-32 Checksum",
"TCP/IP Checksum"
"TCP/IP Checksum",
"XOR Checksum"
]
},
{

59
src/core/operations/XORChecksum.mjs Normal file
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@ -0,0 +1,59 @@
/**
* @author Thomas Weißschuh [thomas@t-8ch.de]
* @copyright Crown Copyright 2023
* @license Apache-2.0
*/
import Operation from "../Operation.mjs";
import Utils from "../Utils.mjs";
import { toHex } from "../lib/Hex.mjs";
/**
* XOR Checksum operation
*/
class XORChecksum extends Operation {
/**
* XORChecksum constructor
*/
constructor() {
super();
this.name = "XOR Checksum";
this.module = "Crypto";
this.description = "XOR Checksum splits the input into blocks of a configurable size and performs the XOR operation on these blocks.";
this.infoURL = "https://wikipedia.org/wiki/XOR";
this.inputType = "ArrayBuffer";
this.outputType = "string";
this.args = [
{
name: "Blocksize",
type: "number",
value: 4
},
];
}
/**
* @param {ArrayBuffer} input
* @param {Object[]} args
* @returns {string}
*/
run(input, args) {
const blocksize = args[0];
input = new Uint8Array(input);
const res = Array(blocksize);
res.fill(0);
for (const chunk of Utils.chunked(input, blocksize)) {
for (let i = 0; i < blocksize; i++) {
res[i] ^= chunk[i];
}
}
return toHex(res, "");
}
}
export default XORChecksum;