2b7e1516 28aed2a6 Abf71588 09cf4f3c 2024. 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. Aes is an implementation of the advanced encryption standard (aes) in c, in accordance with the standard published in 2001 and the aes submission document on rijndael originally.

Below is the sample code from rfc4493, regarding aes 128 cmac. Let’s look at the key k k 2b7e1516 28aed2a6 abf71588.