Is there a library for iPhone to work with HMAC-SH

Question

For all operation with Amazon services(S3, EC2, SimpleDB) You need to sign all resquest with HMAC-SHA-1 Signature(http://en.wikipedia.org/wiki/HMAC , http://docs.amazonwebservices.com/AWSFWS/latest/DeveloperGuide/index.html?SummaryOfAuthentication.html).

I'm working under asp.net backend and there is no problems. Problem is in the iPhone application. iPhone developer says that there is no way to use HMAC-SHA-1 encoding, and he have no rigths to implement his own algorithm. As programmer I cannot understand why there can be a problem.

So I want too know is iPhone developer right?

I've never coded for iPhone, so I don't even where to search such an information.

Answer 1

A bit of googling and I found this document.

Exporting of SHA1 is subject to (United Statese)Federal Government export controls and exporters are advised to contact the Department of Commerce, Bureau of Export Administration for more information.

I also found this:

People's Republic of China and the former Soviet Block can import SHA as long as it's intended for civil end-user applications rather than for military purpose. The following countries are prohibited from importing SHA: Cuba, Iran, Iraq, Libya, North Korea, Serbia, Syria, and Sudan. Please note that this list of embargo countries changes over time.

(Not a direct answer to your question, but certainly pertinent.)