What's the padding mode for AES/GCM? I understood it can be NoPadding, as in ECB mode it can be PKCS5Padding, how about in GCM mode? in JCE interface, we need provide "algorithm/mode/padding" (Reference).
So I used the following code to get the instance and it works in JDK but failed in IBM SDK which says
cannot find provider for supporting AES/GCM/PKCS5Padding
Cipher.getInstance("AES/GCM/PKCS5Padding");
What's real use case for padding?