mirror of https://github.com/gchq/CyberChef.git
87 lines
2.3 KiB
JavaScript
87 lines
2.3 KiB
JavaScript
/**
|
|
* @author Matt C [me@mitt.dev]
|
|
* @copyright Crown Copyright 2020
|
|
* @license Apache-2.0
|
|
*/
|
|
|
|
import Operation from "../Operation.mjs";
|
|
import OperationError from "../errors/OperationError.mjs";
|
|
import forge from "node-forge";
|
|
import { MD_ALGORITHMS } from "../lib/RSA.mjs";
|
|
|
|
/**
|
|
* RSA Decrypt operation
|
|
*/
|
|
class RSADecrypt extends Operation {
|
|
|
|
/**
|
|
* RSADecrypt constructor
|
|
*/
|
|
constructor() {
|
|
super();
|
|
|
|
this.name = "RSA Decrypt";
|
|
this.module = "Ciphers";
|
|
this.description = "Decrypt an RSA encrypted message with a PEM encoded private key.";
|
|
this.infoURL = "https://wikipedia.org/wiki/RSA_(cryptosystem)";
|
|
this.inputType = "string";
|
|
this.outputType = "string";
|
|
this.args = [
|
|
{
|
|
name: "RSA Private Key (PEM)",
|
|
type: "text",
|
|
value: "-----BEGIN RSA PRIVATE KEY-----"
|
|
},
|
|
{
|
|
name: "Key Password",
|
|
type: "text",
|
|
value: ""
|
|
},
|
|
{
|
|
name: "Encryption Scheme",
|
|
type: "argSelector",
|
|
value: [
|
|
{
|
|
name: "RSA-OAEP",
|
|
on: [3]
|
|
},
|
|
{
|
|
name: "RSAES-PKCS1-V1_5",
|
|
off: [3]
|
|
},
|
|
{
|
|
name: "RAW",
|
|
off: [3]
|
|
}]
|
|
},
|
|
{
|
|
name: "Message Digest Algorithm",
|
|
type: "option",
|
|
value: Object.keys(MD_ALGORITHMS)
|
|
}
|
|
];
|
|
}
|
|
|
|
/**
|
|
* @param {string} input
|
|
* @param {Object[]} args
|
|
* @returns {string}
|
|
*/
|
|
run(input, args) {
|
|
const [pemKey, password, scheme, md] = args;
|
|
if (pemKey.replace("-----BEGIN RSA PRIVATE KEY-----", "").length === 0) {
|
|
throw new OperationError("Please enter a private key.");
|
|
}
|
|
try {
|
|
const privKey = forge.pki.decryptRsaPrivateKey(pemKey, password);
|
|
const dMsg = privKey.decrypt(input, scheme, {md: MD_ALGORITHMS[md].create()});
|
|
return forge.util.decodeUtf8(dMsg);
|
|
} catch (err) {
|
|
throw new OperationError(err);
|
|
}
|
|
}
|
|
|
|
}
|
|
|
|
export default RSADecrypt;
|