Thank you for you see this question.
I am writing a LTI program.
The assignment post some data to my program. I see some parameters include oauth_cosumer_key, oauth_nonce, oauth_signature_method, oauth_version, oauth_timestamp, etc....
I am going to build oauth_signature, but failed.
Here is the codes:
Any other params do I need?
$oauth_signature= base64_encode(hash_hmac('sha1',$string,"456",TRUE)); //"456" is the secret I set. I have saved it into the share secret box.
$oauth_signature doesn't matches with $_POST['oauth_signature']
Hope you can help me on this problem.
Best wishes !