Unifying the interfaces of the digest functions


The interafces used by the cryptographic digest functions sha256, sha1 and md5 (xx_init, xx_update, xx_final) are very inconsistent at the moment. Would a patch which would consolidate this situation be desirable?

cheers Mathias

Hi Matthias!

Just created a pull request for it. https://github.com/RIOT-OS/RIOT/pull/5430