Decrypting “SunJCE” AES encrypted data on Android

Question

We need to write some Android code to decrypt some data sent from our server. Our server team gave us some sample decryption code which uses the \"SunJCE\" provider, which unfo

Answer 1

The same garbage is also present in the Java code. It's just that you probably run this on Windows that uses the default Latin (ISO_8859_1) character set and that Android uses UTF-8 by default. It also depends on the console and font used to print out the characters. In this case it is likely that the padding that is used doesn't print on the Windows console but does on the Android code.

You need to see the byte array (e.g. in hexadecimals) to find out which padding is used and then strip it off before turning the plaintext into a string.