[SeaBIOS] [PATCH v3 4/7] tpm: Extend tpm20_extend to support extending to multiple PCR banks

[Stefan Berger]

On 08/10/2016 01:22 PM, Kevin O'Connor wrote:
> On Wed, Aug 10, 2016 at 11:17:30AM -0400, Kevin O'Connor wrote:
>> How about the update below (which I'll squash into the appropriate
>> patches).
>>
>> -Kevin
>>
>>
>> --- a/src/std/tcg.h
>> +++ b/src/std/tcg.h
>> @@ -518,6 +518,11 @@ struct tpm2_digest_values {
>>       struct tpm2_digest_value digest[0];
>>   } PACKED;
>>   
>> +// Each entry in the TPM log contains: a tpm_log_header, a variable
>> +// length digest, a tpm_log_trailer, and a variable length event.  On
>> +// TPM1.2 the digest is a SHA1 hash; on TPM2.0 the digest contains a
>> +// tpm2_digest_values struct followed by a variable number of
>> +// tpm2_digest_value structs.
> Or slightly more detailed here:
>
> // Each entry in the TPM log contains: a tpm_log_header, a variable
> // length digest, a tpm_log_trailer, and a variable length event.  The
> // 'digest' matches what is sent to the TPM hardware via the Extend
> // command.  On TPM1.2 the digest is a SHA1 hash; on TPM2.0 the digest
> // contains a tpm2_digest_values struct followed by a variable number
> // of tpm2_digest_value structs (as specified by the hardware via the
> // TPM2_CAP_PCRS request).

Great!

    Stefan

>
> -Kevin
>