Hi @richc128
If you want to sign them together, please try to consider some key points.
In booti.c bootm.c, where the hab_authenticate function is called, add some logs, print out the addresses of these calculations, and pass them to the HAB function with the correct address, make the input of the function name related to hab_authentication in booti.c reasonable, and then the content of the IVT should be correct, especially the location of the CSF.
Best regards
Harvey