How to calculate AES CMAC using OpenSSL's CMAC_xxx functions?

Question

Is there any way to compute AES CMAC with OpenSSL/libcrypto?

Preferably in a way that takes advantage of AES-NI (or any other hardware ac

Answer 1

As stated in my blog post you can use the CMAC_CTX_new, CMAC_Init, CMAC_Update and CMAC_Final from lib crypto to calculate AES-128-CBC CMAC. Here is an example:

#include 
#include 

void printBytes(unsigned char *buf, size_t len) {
  for(int i=0; i