Hi!

I tried to calculate the final value of PCR 18 by paper and pen, it 
seems that tboot README is wrong about that. In section "PCR Usage" it 
says that tboot policy will also be extended to PCR 18, that's wrong.

PCR 18 is calculated only by:
1) extend hash of tboot (as measured by lcp_mlehash)
2) extend (SHA-1(commandline of first module) | SHA-1(first module))

greetz
Michael

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