I have been given a file which is encrypted in a pgp format. It's been encrypted using my public RSA key.

I am trying to decrypt the file using my RSA private key in a dummy node application.

const NodeRSA = require('node-rsa');
const key = new NodeRSA('*INSERT KEY HERE*');

const encryptedMsg = '*INSERT ENCRYPTED KEY HERE*';

const decrypted = key.decrypt(encryptedMsg, 'utf8');
console.log(decrypted);

but getting the following: Error("Key format must be specified").

Is it possible to decrypt a pgp file using a rsa key?