message: don't check public key if there is none
diff: @@ -96,6 +96,9 @@ async function getSecretStorageKey({ keys: keyInfos }, ssssItemName) {
  {
  keyInfo: info,
  checkPrivateKey: async (input) => {
  + if (!info.pubkey) {
  + return true;
  + }
  const key = await inputToKey(input);
  return MatrixClientPeg.get().checkSecretStoragePrivateKey(key, info.pubkey);
  },
  