CyberChef/src/core/operations/ZlibInflate.mjs

90 lines
2.3 KiB
JavaScript
Raw Normal View History

/**
* @author n1474335 [n1474335@gmail.com]
* @copyright Crown Copyright 2016
* @license Apache-2.0
*/
import Operation from "../Operation";
import {INFLATE_BUFFER_TYPE} from "../lib/Zlib";
import zlibAndGzip from "zlibjs/bin/zlib_and_gzip.min";
const Zlib = zlibAndGzip.Zlib;
const ZLIB_BUFFER_TYPE_LOOKUP = {
"Adaptive": Zlib.Inflate.BufferType.ADAPTIVE,
"Block": Zlib.Inflate.BufferType.BLOCK,
};
/**
* Zlib Inflate operation
*/
class ZlibInflate extends Operation {
/**
* ZlibInflate constructor
*/
constructor() {
super();
this.name = "Zlib Inflate";
this.module = "Compression";
this.description = "Decompresses data which has been compressed using the deflate algorithm with zlib headers.";
this.infoURL = "https://wikipedia.org/wiki/Zlib";
this.inputType = "ArrayBuffer";
this.outputType = "ArrayBuffer";
this.args = [
{
name: "Start index",
type: "number",
value: 0
},
{
name: "Initial output buffer size",
type: "number",
value: 0
},
{
name: "Buffer expansion type",
type: "option",
value: INFLATE_BUFFER_TYPE
},
{
name: "Resize buffer after decompression",
type: "boolean",
value: false
},
{
name: "Verify result",
type: "boolean",
value: false
}
];
this.patterns = [
{
match: "^\\x78(\\x01|\\x9c|\\xda|\\x5e)",
flags: "",
args: [0, 0, "Adaptive", false, false]
},
];
}
/**
* @param {ArrayBuffer} input
* @param {Object[]} args
* @returns {ArrayBuffer}
*/
run(input, args) {
const inflate = new Zlib.Inflate(new Uint8Array(input), {
index: args[0],
bufferSize: args[1],
bufferType: ZLIB_BUFFER_TYPE_LOOKUP[args[2]],
resize: args[3],
verify: args[4]
});
return new Uint8Array(inflate.decompress()).buffer;
}
}
export default ZlibInflate;