2b7e1516 28aed2a6 Abf71588 09cf4f3c 2025 Model. It is, succinctly, hkdf but with hmac [ rfc2104] replaced by cmac [. Below is the sample code from rfc4493, regarding aes 128 cmac.

This project allows to brute force remaining bytes on. The problem in your code is that your are not treating the message or key 2b7e1516 28aed2a6 abf71588 09cf4f3c as a hex number which it is in this case but you are treating it as bytes.