Decrypting GPG Messages Using Subkeys

index.js

var openpgp = require("openpgp");
var fs = require("fs");

var key = fs.readFileSync("<armored key file>", "utf8");
var skey = openpgp.key.readArmored(key).keys[0];
skey.decrypt("<key password>");

var message = fs.readFileSync("<armored message>", "utf8");
var m = openpgp.message.readArmored(message);

var options = {
  message: m,
  privateKey: skey
};

openpgp.decrypt(options).then(function(plaintext) {
  console.log(plaintext);
});

openpgpjs.diff

diff --git a/src/key.js b/src/key.js
index 5669188..e0e66b9 100644
--- a/src/key.js
+++ b/src/key.js
@@ -49,9 +49,6 @@ export function Key(packetlist) {
   this.users = null;
   this.subKeys = null;
   this.packetlist2structure(packetlist);
-  if (!this.primaryKey || !this.users) {
-    throw new Error('Invalid key: need at least key and user ID packet');
-  }
 }
 
 /**