mirror of https://github.com/gchq/CyberChef.git
58 lines
1.8 KiB
JavaScript
58 lines
1.8 KiB
JavaScript
/**
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* @author Matt C [me@mitt.dev]
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* @copyright Crown Copyright 2022
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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 {decompress} from "@blu3r4y/lzma";
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import Utils, {isWorkerEnvironment} from "../Utils.mjs";
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/**
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* LZMA Decompress operation
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*/
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class LZMADecompress extends Operation {
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/**
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* LZMADecompress constructor
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*/
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constructor() {
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super();
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this.name = "LZMA Decompress";
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this.module = "Compression";
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this.description = "Decompresses data using the Lempel-Ziv-Markov chain Algorithm.";
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this.infoURL = "https://wikipedia.org/wiki/Lempel%E2%80%93Ziv%E2%80%93Markov_chain_algorithm";
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this.inputType = "ArrayBuffer";
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this.outputType = "ArrayBuffer";
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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 {ArrayBuffer}
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*/
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async run(input, args) {
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return new Promise((resolve, reject) => {
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decompress(new Uint8Array(input), (result, error) => {
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if (error) {
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reject(new OperationError(`Failed to decompress input: ${error.message}`));
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}
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// The decompression returns either a String or an untyped unsigned int8 array, but we can just get the unsigned data from the buffer
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if (typeof result == "string") {
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resolve(Utils.strToArrayBuffer(result));
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} else {
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resolve(new Int8Array(result).buffer);
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}
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}, (percent) => {
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if (isWorkerEnvironment()) self.sendStatusMessage(`Decompressing input: ${(percent*100).toFixed(2)}%`);
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});
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});
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}
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}
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export default LZMADecompress;
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