IPSec AH (NOT ESP)?

Hi all:

I have an application that requres explicitly AH IPSec tunnel.  Its not strictly a VPN, as payload encryption is strictly prohibited.  I'm told that I have to use Microtik for this, as EdgeMAX doesn't support AH.  

I'm finding very little reference to IPSec AH and EdgeRouter.  I did find a 2007 document that stated Vyatta did not support AH, but 2007 is a long time ago in the internet world...

Is there any way to support AH IPSec tunnels on an EdgeRouter?

Thanks!