Error added: 2013-12-12T20:38:02Z
If you're trying to use SHA256 for your HMAC, your version of OpenSSL might not support it.
If you know the answer, please add your own solution below.
If you don't know, but find out later, please come back and share your answer - there will be other people
struggling with this too.
If you want to be notified via email when this is solved, enter your email address here: