Hello,
I want to seal data (a passphrase) to PCR >15.

# tpm_nvdefine -i 1 -s 6 p -r 18 -w 18 --permissions="AUTHWRITE" -z
Cannot seal NVRAM area to PCR > 15

Why is this not possible? I want to seal to Intel TXT generated PCRs and this 
doesn't sound right... should I recompile with this check commented out and try?

How to get around it? Do I have to use tpm_sealdata (for example) which does 
not have this limitation but requires a blob and a SRK? I'd like to avoid that 
if at all possible.

In case I need to use tpm_sealdata, how much is system.data going to differ 
between various systems and when? Will a simple one work for this one purpose 
assuming I don't have more keys than the default one?

Thanks

Jan
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