95 lines
3.1 KiB
JavaScript
95 lines
3.1 KiB
JavaScript
/**
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* @author Medjedtxm
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* @copyright Crown Copyright 2026
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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 Utils from "../Utils.mjs";
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import OperationError from "../errors/OperationError.mjs";
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import { toHex } from "../lib/Hex.mjs";
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import { decryptTwofish } from "../lib/Twofish.mjs";
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/**
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* Twofish Decrypt operation
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*/
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class TwofishDecrypt extends Operation {
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/**
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* TwofishDecrypt constructor
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*/
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constructor() {
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super();
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this.name = "Twofish Decrypt";
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this.module = "Ciphers";
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this.description = "Twofish is a symmetric key block cipher designed by Bruce Schneier. It was one of the five AES finalists. Twofish operates on 128-bit blocks and supports key sizes of 128, 192, or 256 bits with 16 rounds of a Feistel network.<br><br>When using CBC or ECB mode, the PKCS#7 padding scheme is used.";
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this.infoURL = "https://wikipedia.org/wiki/Twofish";
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this.inputType = "string";
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this.outputType = "string";
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this.args = [
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{
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"name": "Key",
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"type": "toggleString",
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"value": "",
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"toggleValues": ["Hex", "UTF8", "Latin1", "Base64"]
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},
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{
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"name": "IV",
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"type": "toggleString",
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"value": "",
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"toggleValues": ["Hex", "UTF8", "Latin1", "Base64"]
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},
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{
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"name": "Mode",
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"type": "option",
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"value": ["CBC", "CFB", "OFB", "CTR", "ECB"]
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},
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{
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"name": "Input",
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"type": "option",
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"value": ["Hex", "Raw"]
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},
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{
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"name": "Output",
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"type": "option",
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"value": ["Raw", "Hex"]
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},
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{
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"name": "Padding",
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"type": "option",
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"value": ["PKCS5", "NO", "ZERO", "RANDOM", "BIT"]
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}
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];
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}
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/**
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* @param {string} 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 key = Utils.convertToByteArray(args[0].string, args[0].option),
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iv = Utils.convertToByteArray(args[1].string, args[1].option),
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[,, mode, inputType, outputType, padding] = args;
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if (key.length !== 16 && key.length !== 24 && key.length !== 32)
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throw new OperationError(`Invalid key length: ${key.length} bytes
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Twofish uses a key length of 16 bytes (128 bits), 24 bytes (192 bits), or 32 bytes (256 bits).`);
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if (iv.length !== 16 && mode !== "ECB")
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throw new OperationError(`Invalid IV length: ${iv.length} bytes
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Twofish uses an IV length of 16 bytes (128 bits).
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Make sure you have specified the type correctly (e.g. Hex vs UTF8).`);
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input = Utils.convertToByteArray(input, inputType);
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const output = decryptTwofish(input, key, iv, mode, padding);
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return outputType === "Hex" ? toHex(output, "") : Utils.byteArrayToUtf8(output);
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}
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}
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export default TwofishDecrypt;
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