69 lines
1.9 KiB
JavaScript
69 lines
1.9 KiB
JavaScript
/**
|
|
* @author cplussharp
|
|
* @copyright Crown Copyright 2023
|
|
* @license Apache-2.0
|
|
*/
|
|
|
|
import Operation from "../Operation.mjs";
|
|
import OperationError from "../errors/OperationError.mjs";
|
|
import {
|
|
parseKeyPem,
|
|
derivePublicKeyInfo,
|
|
keyInfoToPem,
|
|
} from "../lib/KeyConvert.mjs";
|
|
|
|
/**
|
|
* Public Key from Private Key operation
|
|
*/
|
|
class PubKeyFromPrivKey extends Operation {
|
|
|
|
/**
|
|
* PubKeyFromPrivKey constructor
|
|
*/
|
|
constructor() {
|
|
super();
|
|
|
|
this.name = "Public Key from Private Key";
|
|
this.module = "PublicKey";
|
|
this.description = "Extracts the Public Key from a Private Key.";
|
|
this.infoURL = "https://en.wikipedia.org/wiki/PKCS_8";
|
|
this.inputType = "string";
|
|
this.outputType = "string";
|
|
this.args = [];
|
|
this.checks = [];
|
|
}
|
|
|
|
/**
|
|
* @param {string} input
|
|
* @param {Object[]} args
|
|
* @returns {string}
|
|
*/
|
|
run(input, args) {
|
|
let output = "";
|
|
let match;
|
|
const regex = /-----BEGIN ((RSA |EC |DSA )?PRIVATE KEY)-----/g;
|
|
while ((match = regex.exec(input)) !== null) {
|
|
const indexBase64 = match.index + match[0].length;
|
|
const footer = `-----END ${match[1]}-----`;
|
|
const indexFooter = input.indexOf(footer, indexBase64);
|
|
if (indexFooter === -1) {
|
|
throw new OperationError(`PEM footer '${footer}' not found`);
|
|
}
|
|
|
|
const privKeyPem = input.substring(match.index, indexFooter + footer.length);
|
|
let privInfo;
|
|
try {
|
|
privInfo = parseKeyPem(privKeyPem);
|
|
} catch (err) {
|
|
throw new OperationError(`Unsupported key type: ${err}`);
|
|
}
|
|
|
|
const pubInfo = derivePublicKeyInfo(privInfo);
|
|
output += keyInfoToPem(pubInfo);
|
|
}
|
|
return output;
|
|
}
|
|
}
|
|
|
|
export default PubKeyFromPrivKey;
|