We had a report of messages from ima saying "Error communicating with TPM". Looking into it a bit, it looks like with some Dell systems (possibly others as well) in the bios they can set the hash algorithm being used. In this case with that set to sha256 the messages appear. Flipping the system to using sha1 makes them disappear. Looking at the ima code, ima_calc_boot_aggregate_tfm hard codes using sha1. Should that be changed to use whatever the default is in the config, or possibly find out from the tpm what algorithm is being used? Regards, Jerry
