Function decryptSyncMessage

src/modules/pgpModel.js:394–428

(key, message)

 * @return {Promise<Object,Error>}
 */
export async function decryptSyncMessage(key, message) {
  const msg = await pgpDecrypt({message, decryptionKeys: key, verificationKeys: key});
  // check signature
  const [sig] = msg.signatures;
  try {
    await sig.verified;
    await key.getSigningKey(sig.keyID);
  } catch (e) {
    throw new Error('Signature of synced keyring is invalid');
  }
  const syncData = JSON.parse(msg.data);
  const publicKeys = [];
  const changeLog = {};
  let fingerprint;
  for (fingerprint in syncData.insertedKeys) {
    publicKeys.push({
      type: 'public',
      armored: syncData.insertedKeys[fingerprint].armored
    });
    changeLog[fingerprint] = {
      type: keyringSync.INSERT,
      time: syncData.insertedKeys[fingerprint].time
    };
  }
  for (fingerprint in syncData.deletedKeys) {
    changeLog[fingerprint] = {
      type: keyringSync.DELETE,
      time: syncData.deletedKeys[fingerprint].time
    };
  }
  return {
    changeLog,
    keys: publicKeys
  };
}

/**
 * @param  {Key} key - used to sign and encrypt the package