mirror of https://github.com/gchq/CyberChef.git
75 lines
1.9 KiB
JavaScript
75 lines
1.9 KiB
JavaScript
/**
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* @author Matt C [me@mitt.dev]
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* @author gchq77703 []
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* @copyright Crown Copyright 2020
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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 OperationError from "../errors/OperationError.mjs";
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import forge from "node-forge";
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import { MD_ALGORITHMS } from "../lib/RSA.mjs";
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/**
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* RSA Sign operation
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*/
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class RSASign extends Operation {
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/**
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* RSASign constructor
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*/
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constructor() {
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super();
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this.name = "RSA Sign";
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this.module = "Ciphers";
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this.description = "Sign a plaintext message with a PEM encoded RSA key.";
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this.infoURL = "https://wikipedia.org/wiki/RSA_(cryptosystem)";
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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: "RSA Private Key (PEM)",
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type: "text",
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value: "-----BEGIN RSA PRIVATE KEY-----"
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},
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{
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name: "Key Password",
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type: "text",
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value: ""
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},
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{
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name: "Message Digest Algorithm",
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type: "option",
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value: Object.keys(MD_ALGORITHMS)
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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, password, mdAlgo] = args;
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if (key.replace("-----BEGIN RSA PRIVATE KEY-----", "").length === 0) {
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throw new OperationError("Please enter a private key.");
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}
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try {
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const privateKey = forge.pki.decryptRsaPrivateKey(key, password);
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// Generate message hash
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const md = MD_ALGORITHMS[mdAlgo].create();
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md.update(input, "utf8");
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// Sign message hash
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const sig = privateKey.sign(md);
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return sig;
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} catch (err) {
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throw new OperationError(err);
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}
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}
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}
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export default RSASign;
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