mirror of https://github.com/gchq/CyberChef.git
81 lines
2.5 KiB
JavaScript
81 lines
2.5 KiB
JavaScript
/**
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* @author h345983745
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* @copyright Crown Copyright 2019
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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 blakejs from "blakejs";
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import OperationError from "../errors/OperationError.mjs";
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import Utils from "../Utils.mjs";
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import { toBase64 } from "../lib/Base64.mjs";
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/**
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* BLAKE2s Operation
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*/
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class BLAKE2s extends Operation {
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/**
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* BLAKE2s constructor
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*/
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constructor() {
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super();
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this.name = "BLAKE2s";
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this.module = "Hashing";
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this.description = `Performs BLAKE2s hashing on the input.
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<br><br>BLAKE2s is a flavour of the BLAKE cryptographic hash function that is optimized for 8- to 32-bit platforms and produces digests of any size between 1 and 32 bytes.
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<br><br>Supports the use of an optional key.`;
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this.infoURL = "https://wikipedia.org/wiki/BLAKE_(hash_function)#BLAKE2";
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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": "Size",
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"type": "option",
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"value": ["256", "160", "128"]
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}, {
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"name": "Output Encoding",
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"type": "option",
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"value": ["Hex", "Base64", "Raw"]
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},
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{
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"name": "Key",
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"type": "toggleString",
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"value": "",
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"toggleValues": ["UTF8", "Decimal", "Base64", "Hex", "Latin1"]
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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} The input having been hashed with BLAKE2s in the encoding format speicifed.
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*/
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run(input, args) {
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const [outSize, outFormat] = args;
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let key = Utils.convertToByteArray(args[2].string || "", args[2].option);
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if (key.length === 0) {
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key = null;
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} else if (key.length > 32) {
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throw new OperationError(["Key cannot be greater than 32 bytes", "It is currently " + key.length + " bytes."].join("\n"));
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}
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input = new Uint8Array(input);
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switch (outFormat) {
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case "Hex":
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return blakejs.blake2sHex(input, key, outSize / 8);
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case "Base64":
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return toBase64(blakejs.blake2s(input, key, outSize / 8));
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case "Raw":
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return Utils.arrayBufferToStr(blakejs.blake2s(input, key, outSize / 8).buffer);
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default:
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return new OperationError("Unsupported Output Type");
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}
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}
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}
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export default BLAKE2s;
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