CMAC not working

[Tomas Mraz]

On Tue, 2022-10-11 at 10:50 +0000, Fernando Elena Benavente wrote:
> Hi guys, Im triying to use the EVP_MAC  OpenSSL API with the
> CMAC_AES256, I have been using some testing vectors I found on
> github, but seems they doesn’t work on the CMAC  of OpenSSl, as the
> expected output of the test vectors are different from the OpenSSL
> CMAC output.
>  
> I attach a screenshot of the test vectors we are using, and how we
> are introducing it on our key and plaintext variables, the CMAC code
> is the demo code on OpenSSL github.
>  

It is better not to use screenshots if possible and rather do
copy&paste to save mailbox space of all the recipients.

Our demo is actually incorrect because the cipher name used should be
'AES-256-CBC' to produce a proper CMAC.

-- 
Tomáš Mráz, OpenSSL