AES CCM encryption/decryption examples

[Lucas]

Hello,

Are there examples of AES CCM encryption/decription?

Is there a recommended procedure for generating nounces?

Are there recommended procedures for using CCM?

Thank you.

Update: I forgot to mention I am using a nrf52832.

[ovrebekk]

Hi Lucas

I made an example and made it available on Github:
github.com/.../nrf52-esb-ccm-example

Please have a look at it and let me know if it can be of any help. If you have any feedback on the code I will make sure to take it into consideration :)

Best regards
Torbjørn

[ovrebekk]

Hi Macro

The padding is a bug. In my first implementation I implemented the counter as a 5 byte array, and added 3 bytes of padding as per the specification, but later I changed the counter to a uint64_t to simplify the code. Unfortunately I forgot to remove the padding when doing so.

I have removed the padding now, and updated the repo.

Best regards