mirror of https://github.com/gchq/CyberChef.git
88 lines
2.6 KiB
JavaScript
88 lines
2.6 KiB
JavaScript
/**
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* @author tlwr [toby@toby.codes]
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* @copyright Crown Copyright 2017
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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 kbpgp from "kbpgp";
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import { ASP, importPrivateKey } from "../lib/PGP.mjs";
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import OperationError from "../errors/OperationError.mjs";
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import * as es6promisify from "es6-promisify";
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const promisify = es6promisify.default ? es6promisify.default.promisify : es6promisify.promisify;
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/**
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* PGP Decrypt operation
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*/
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class PGPDecrypt extends Operation {
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/**
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* PGPDecrypt constructor
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*/
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constructor() {
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super();
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this.name = "PGP Decrypt";
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this.module = "PGP";
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this.description = [
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"Input: the ASCII-armoured PGP message you want to decrypt.",
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"<br><br>",
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"Arguments: the ASCII-armoured PGP private key of the recipient, ",
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"(and the private key password if necessary).",
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"<br><br>",
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"Pretty Good Privacy is an encryption standard (OpenPGP) used for encrypting, decrypting, and signing messages.",
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"<br><br>",
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"This function uses the Keybase implementation of PGP.",
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].join("\n");
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this.infoURL = "https://wikipedia.org/wiki/Pretty_Good_Privacy";
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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": "Private key of recipient",
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"type": "text",
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"value": ""
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},
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{
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"name": "Private key passphrase",
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"type": "string",
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"value": ""
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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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* @throws {OperationError} if invalid private key
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*/
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async run(input, args) {
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const encryptedMessage = input,
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[privateKey, passphrase] = args,
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keyring = new kbpgp.keyring.KeyRing();
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let plaintextMessage;
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if (!privateKey) throw new OperationError("Enter the private key of the recipient.");
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const key = await importPrivateKey(privateKey, passphrase);
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keyring.add_key_manager(key);
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try {
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plaintextMessage = await promisify(kbpgp.unbox)({
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armored: encryptedMessage,
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keyfetch: keyring,
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asp: ASP
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});
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} catch (err) {
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throw new OperationError(`Couldn't decrypt message with provided private key: ${err}`);
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}
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return plaintextMessage.toString();
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}
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}
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export default PGPDecrypt;
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