mirror of https://github.com/gchq/CyberChef.git
72 lines
1.7 KiB
JavaScript
72 lines
1.7 KiB
JavaScript
/**
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* @author n1474335 [n1474335@gmail.com]
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* @copyright Crown Copyright 2016
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* @license Apache-2.0
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*/
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import Operation from "../Operation";
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import OperationError from "../errors/OperationError";
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import JSSHA3 from "js-sha3";
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/**
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* Shake operation
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*/
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class Shake extends Operation {
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/**
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* Shake constructor
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*/
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constructor() {
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super();
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this.name = "Shake";
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this.module = "Crypto";
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this.description = "Shake is an Extendable Output Function (XOF) of the SHA-3 hash algorithm, part of the Keccak family, allowing for variable output length/size.";
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this.infoURL = "https://wikipedia.org/wiki/SHA-3#Instances";
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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": "Capacity",
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"type": "option",
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"value": ["256", "128"]
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},
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{
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"name": "Size",
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"type": "number",
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"value": 512
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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 capacity = parseInt(args[0], 10),
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size = args[1];
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let algo;
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if (size < 0)
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throw new OperationError("Size must be greater than 0");
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switch (capacity) {
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case 128:
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algo = JSSHA3.shake128;
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break;
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case 256:
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algo = JSSHA3.shake256;
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break;
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default:
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throw new OperationError("Invalid size");
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}
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return algo(input, size);
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}
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}
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export default Shake;
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