title: Gravatar for Iphone? How do I generate a hexadecimal MD5 hash?
body: <p>I'd like to use <a href="http://en.gravatar.com/site/implement/url" rel="nofollow noreferrer">gravatar</a> in my iPhone application.  Is there anyway to generate a hexadecimal MD5 hash in Objective-C for iPhone?  Using openssl on iPhone is a no-go.</p>