Decrypting data that was AES encrypted with Objective-C with Java

Question

I try to decrypt data that was originally encrypted with Objective-C in Java.

There are other questions mentioning this but they are really cluttered and many of them a

Answer 1

This is probably not contributing to your problem, but it's wrong anyway:

   char * keyPtr[kCCKeySizeAES128+1]; // room for terminator (unused)

That defines an array of kCCKeySizeAES128 + 1 pointers, not kCCKeySizeAES128 + 1 bytes. As it happens, it is OK because the buffer you get is four or eight times larger than you need depending on whether you are compiling for 32 or 64 bit.