mirror of https://github.com/gchq/CyberChef.git
93 lines
3.1 KiB
JavaScript
93 lines
3.1 KiB
JavaScript
/**
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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.mjs";
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import {runHash} from "../lib/Hash.mjs";
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/**
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* SHA2 operation
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*/
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class SHA2 extends Operation {
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/**
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* SHA2 constructor
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*/
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constructor() {
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super();
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this.name = "SHA2";
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this.module = "Crypto";
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this.description = "The SHA-2 (Secure Hash Algorithm 2) hash functions were designed by the NSA. SHA-2 includes significant changes from its predecessor, SHA-1. The SHA-2 family consists of hash functions with digests (hash values) that are 224, 256, 384 or 512 bits: SHA224, SHA256, SHA384, SHA512.<br><br><ul><li>SHA-512 operates on 64-bit words.</li><li>SHA-256 operates on 32-bit words.</li><li>SHA-384 is largely identical to SHA-512 but is truncated to 384 bytes.</li><li>SHA-224 is largely identical to SHA-256 but is truncated to 224 bytes.</li><li>SHA-512/224 and SHA-512/256 are truncated versions of SHA-512, but the initial values are generated using the method described in Federal Information Processing Standards (FIPS) PUB 180-4.</li></ul> The message digest algorithm for SHA256 variants consists, by default, of 64 rounds, and for SHA512 variants, it is, by default, 160.";
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this.infoURL = "https://wikipedia.org/wiki/SHA-2";
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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: "Size",
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type: "argSelector",
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value: [
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{
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name: "512",
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on: [2],
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off: [1]
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},
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{
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name: "384",
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on: [2],
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off: [1]
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},
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{
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name: "256",
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on: [1],
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off: [2]
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},
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{
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name: "224",
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on: [1],
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off: [2]
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},
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{
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name: "512/256",
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on: [2],
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off: [1]
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},
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{
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name: "512/224",
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on: [2],
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off: [1]
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}
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]
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},
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{
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name: "Rounds", // For SHA256 variants
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type: "number",
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value: 64,
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min: 16
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},
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{
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name: "Rounds", // For SHA512 variants
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type: "number",
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value: 160,
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min: 32
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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 size = args[0];
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const rounds = (size === "256" || size === "224") ? args[1] : args[2];
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return runHash("sha" + size, input, {rounds: rounds});
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}
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}
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export default SHA2;
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