Note that AES is a block hash, not suitable for encrypting bulk data simply by dividing the data into blocks and encrypting each one with the same key. That would open up all sorts of flaws and vulnerabilities. typically you use something like "cipher block chaining" or "random ctr-mode" that generate separate xor keys for each block of data, BASED on your AES key. Essentially you need a library like openSSL on top of AES before you have something more than a mathematical curiosity.
"Cryptography is hard."