mirror of https://github.com/gchq/CyberChef.git
89 lines
2.7 KiB
JavaScript
89 lines
2.7 KiB
JavaScript
/**
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* @author swesven
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* @copyright 2021
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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 { encryptSM4 } from "../lib/SM4.mjs";
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/**
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* SM4 Encrypt operation
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*/
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class SM4Encrypt extends Operation {
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/**
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* SM4Encrypt constructor
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*/
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constructor() {
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super();
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this.name = "SM4 Encrypt";
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this.module = "Ciphers";
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this.description = "SM4 is a 128-bit block cipher, currently established as a national standard (GB/T 32907-2016) of China. Multiple block cipher modes are supported. When using CBC or ECB mode, the PKCS#7 padding scheme is used.";
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this.infoURL = "https://wikipedia.org/wiki/SM4_(cipher)";
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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": ["Raw", "Hex"]
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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": ["Hex", "Raw"]
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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] = args;
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if (key.length !== 16)
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throw new OperationError(`Invalid key length: ${key.length} bytes
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SM4 uses a key length of 16 bytes (128 bits).`);
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if (iv.length !== 16 && !mode.startsWith("ECB"))
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throw new OperationError(`Invalid IV length: ${iv.length} bytes
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SM4 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 = encryptSM4(input, key, iv, mode.substring(0, 3), mode.endsWith("NoPadding"));
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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 SM4Encrypt;
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