We have a non-SharePoint website that currently allows users to search for documents in a non-SharePoint data repository on a shared drive. We are implementing SharePoint 2013 as a greenfield application. Our intent is to move and manage all of the documents that external users would search for to SharePoint libraries.
Is it possible (and how) to give the external users access to SharePoint search from a non-SharePoint based website? The website is .Net based.