Need help encrypting a message using a key pair #4211

const privateKey:string = "",
  publicKey:string = "",
  callback = function (keyError:NodeJS.ErrnoException, keyPublic:Buffer, keyPrivate:Buffer) {
      if (keyError === null) {
          privateKey = keyPrivate.toString();
          publicKey = keyPublic.toString();

          crypto.privateEncrypt({
              encoding: "utf8",
              format: "pem",
              key: privateKey,
              passphrase: "a real big hash",
              type: "pkcs8"
          }, Buffer.from("some text"));
      } else {
          console.log(keyError);
      }
  },
  options:ED448KeyPairOptions = {
      privateKeyEncoding: {
          cipher: "aes-128-cbc",
          format: "pem",
          passphrase: "a real big hash",
          type: "pkcs8"
      },
      publicKeyEncoding: {
          format: "pem",
          type: "spki"
      }
  };
crypto.generateKeyPair("ed448", options, callback);