Re: [PATCH AUTOSEL 5.7 03/30] ima: extend boot_aggregate with kernel measurements

Ken Goldman
2020-12-28T19:29:41Z

On 12/12/2020 9:22 PM, Mimi Zohar wrote:
> Ok. Going forward, it sounds like we need to define a new
> "boot_aggregate" record. One that contains a version number and PCR
> mask.

Just BTW, there is a TCG standard for a TPM 2.0 PCR mask that works
well.

There is also a standard for an event log version number. It is
the first event of a TPM 2.0 event log. It is strange.

One useful field, though, is a mapping between the algorithm ID (e.g.,
sha256 is 0x000b) and the digest size (e.g., 32 bytes). This permits
a parser to parse a log even when it encounters an unknown digest
algorithm.