void checkAuth(DB db) throws IOException {
DB.AuthorizationCredentials credentials = db.getAuthorizationCredentials();
if (credentials == null) {
if (db._name.equals("admin")) return;
checkAuth(db._mongo.getDB("admin"));
return;
}
if (_authed.containsKey(db)) return;
CommandResult res = runCommand(db, credentials.getNonceCommand());
res.throwOnError();
res = runCommand(db, credentials.getAuthCommand(res.getString("nonce")));
res.throwOnError();
_authed.put(db, true);
}
