I am trying to implement an authentication solution with PHP and Objective-C. Both languages create their own HMAC-SHA1 encoded strings with the same key and the same secret.
Apparently they seem to differ in their way how they do it.
On Objective-C side I am using OAuthCustomer as signing class which produces the correct looking encoded string:
On PHP side I am using the built-in function hash_hmac('sha1',…) with base64 encoding which produces this:
Then I have tried to use another function (mentioned here) and this produces with base64 encoding this:
I have absolutely no idea how I can fix this issue and I don't even know why this happens.
Thanks a bunch for help,