CyberChef/src/core/operations/LZMADecompress.mjs

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2022-09-19 15:20:27 +02:00
/**
* @author Matt C [me@mitt.dev]
* @copyright Crown Copyright 2022
* @license Apache-2.0
*/
import Operation from "../Operation.mjs";
import OperationError from "../errors/OperationError.mjs";
import {decompress} from "@blu3r4y/lzma";
import Utils, {isWorkerEnvironment} from "../Utils.mjs";
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/**
* LZMA Decompress operation
*/
class LZMADecompress extends Operation {
/**
* LZMADecompress constructor
*/
constructor() {
super();
this.name = "LZMA Decompress";
this.module = "Compression";
this.description = "Decompresses data using the Lempel-Ziv-Markov chain Algorithm.";
this.infoURL = "https://wikipedia.org/wiki/Lempel%E2%80%93Ziv%E2%80%93Markov_chain_algorithm";
this.inputType = "ArrayBuffer";
this.outputType = "ArrayBuffer";
}
/**
* @param {ArrayBuffer} input
* @param {Object[]} args
* @returns {ArrayBuffer}
*/
async run(input, args) {
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return new Promise((resolve, reject) => {
decompress(new Uint8Array(input), (result, error) => {
if (error) {
reject(new OperationError(`Failed to decompress input: ${error.message}`));
}
// The decompression returns either a String or an untyped unsigned int8 array, but we can just get the unsigned data from the buffer
if (typeof result == "string") {
resolve(Utils.strToArrayBuffer(result));
} else {
resolve(new Int8Array(result).buffer);
}
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}, (percent) => {
if (isWorkerEnvironment()) self.sendStatusMessage(`Decompressing input: ${(percent*100).toFixed(2)}%`);
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});
});
}
}
export default LZMADecompress;