mirror of https://github.com/gchq/CyberChef.git
73 lines
2.3 KiB
JavaScript
73 lines
2.3 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 {detectFileType} from "../lib/FileType";
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import {FILE_SIGNATURES} from "../lib/FileSignatures";
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/**
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* Detect File Type operation
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*/
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class DetectFileType extends Operation {
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/**
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* DetectFileType constructor
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*/
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constructor() {
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super();
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this.name = "Detect File Type";
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this.module = "Default";
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this.description = "Attempts to guess the MIME (Multipurpose Internet Mail Extensions) type of the data based on 'magic bytes'.<br><br>Currently supports the following file types: 7z, amr, avi, bmp, bz2, class, cr2, crx, dex, dmg, doc, elf, eot, epub, exe, flac, flv, gif, gz, ico, iso, jpg, jxr, m4a, m4v, mid, mkv, mov, mp3, mp4, mpg, ogg, otf, pdf, png, ppt, ps, psd, rar, rtf, sqlite, swf, tar, tar.z, tif, ttf, utf8, vmdk, wav, webm, webp, wmv, woff, woff2, xls, xz, zip.";
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this.infoURL = "https://wikipedia.org/wiki/List_of_file_signatures";
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this.inputType = "ArrayBuffer";
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this.outputType = "string";
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this.args = Object.keys(FILE_SIGNATURES).map(cat => {
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return {
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name: cat,
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type: "boolean",
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value: true
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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 data = new Uint8Array(input),
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categories = [];
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args.forEach((cat, i) => {
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if (cat) categories.push(Object.keys(FILE_SIGNATURES)[i]);
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});
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const types = detectFileType(data, categories);
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if (!types.length) {
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return "Unknown file type. Have you tried checking the entropy of this data to determine whether it might be encrypted or compressed?";
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} else {
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let output = "";
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types.forEach(type => {
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output += "File extension: " + type.extension + "\n" +
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"MIME type: " + type.mime + "\n";
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if (type.description && type.description.length) {
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output += "\nDescription: " + type.description + "\n";
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}
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});
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return output;
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}
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}
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}
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export default DetectFileType;
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