CyberChef/src/core/operations/RenderImage.mjs

91 lines
2.4 KiB
JavaScript
Raw Normal View History

2018-05-28 00:27:11 +02:00
/**
* @author tlwr [toby@toby.codes]
* @copyright Crown Copyright 2017
* @license Apache-2.0
*/
import { fromBase64, toBase64 } from "../lib/Base64";
import { fromHex } from "../lib/Hex";
import Operation from "../Operation";
import OperationError from "../errors/OperationError";
2018-05-28 00:27:11 +02:00
import Utils from "../Utils";
import Magic from "../lib/Magic";
/**
* Render Image operation
*/
class RenderImage extends Operation {
/**
* RenderImage constructor
*/
constructor() {
super();
this.name = "Render Image";
this.module = "Image";
this.description = "Displays the input as an image. Supports the following formats:<br><br><ul><li>jpg/jpeg</li><li>png</li><li>gif</li><li>webp</li><li>bmp</li><li>ico</li></ul>";
this.inputType = "string";
this.outputType = "html";
this.args = [
{
"name": "Input format",
"type": "option",
"value": ["Raw", "Base64", "Hex"]
}
];
this.patterns = [
{
"match": "^(?:\\xff\\xd8\\xff|\\x89\\x50\\x4e\\x47|\\x47\\x49\\x46|.{8}\\x57\\x45\\x42\\x50|\\x42\\x4d)",
"flags": "",
"args": ["Raw"],
2018-05-28 00:27:11 +02:00
"useful": true
}
];
}
/**
* @param {string} input
* @param {Object[]} args
* @returns {html}
*/
run(input, args) {
const inputFormat = args[0];
let dataURI = "data:";
if (!input.length) return "";
// Convert input to raw bytes
switch (inputFormat) {
case "Hex":
input = fromHex(input);
break;
case "Base64":
// Don't trust the Base64 entered by the user.
// Unwrap it first, then re-encode later.
input = fromBase64(input, undefined, "byteArray");
break;
case "Raw":
default:
input = Utils.strToByteArray(input);
break;
}
// Determine file type
const type = Magic.magicFileType(input);
if (type && type.mime.indexOf("image") === 0) {
dataURI += type.mime + ";";
} else {
throw new OperationError("Invalid file type");
2018-05-28 00:27:11 +02:00
}
// Add image data to URI
dataURI += "base64," + toBase64(input);
return "<img src='" + dataURI + "'>";
}
}
export default RenderImage;