mirror of https://github.com/gchq/CyberChef.git
88 lines
2.3 KiB
JavaScript
88 lines
2.3 KiB
JavaScript
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/**
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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 Utils from "../Utils";
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import CryptoApi from "crypto-api/src/crypto-api";
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/**
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* HMAC operation
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*/
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class HMAC extends Operation {
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/**
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* HMAC constructor
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*/
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constructor() {
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super();
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this.name = "HMAC";
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this.module = "Hashing";
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this.description = "Keyed-Hash Message Authentication Codes (HMAC) are a mechanism for message authentication using cryptographic hash functions.";
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this.inputType = "ArrayBuffer";
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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": "binaryString",
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"value": ""
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},
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{
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"name": "Hashing function",
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"type": "option",
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"value": [
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"MD2",
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"MD4",
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"MD5",
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"SHA0",
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"SHA1",
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"SHA224",
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"SHA256",
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"SHA384",
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"SHA512",
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"SHA512/224",
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"SHA512/256",
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"RIPEMD128",
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"RIPEMD160",
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"RIPEMD256",
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"RIPEMD320",
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"HAS160",
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"Whirlpool",
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"Whirlpool-0",
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"Whirlpool-T",
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"Snefru"
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]
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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 key = args[0],
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hashFunc = args[1].toLowerCase(),
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msg = Utils.arrayBufferToStr(input, false),
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hasher = CryptoApi.getHasher(hashFunc);
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// Horrible shim to fix constructor bug. Reported in nf404/crypto-api#8
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hasher.reset = () => {
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hasher.state = {};
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const tmp = new hasher.constructor();
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hasher.state = tmp.state;
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};
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const mac = CryptoApi.getHmac(CryptoApi.encoder.fromUtf(key), hasher);
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mac.update(msg);
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return CryptoApi.encoder.toHex(mac.finalize());
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}
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}
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export default HMAC;
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