Hi Jon, list,

thanks for the script, it was realy helpful to see that you did the
same as I did. When feeding with the same values, our script's output is
the same. The problem is: it doesn't match the values in my pcr.

Here's my SINIT to MLE Data

06 00 00 00 80 00 00 00 20 08 06 25 00 00 2e 00
00 00 00 00 ff ff ff ff 00 00 00 00 00 00 00 00
00 00 00 00 bd 7a 2c 80 0a 93 de 4c c6 35 ee 63
a8 80 49 f6 cf c7 02 f3 e7 82 65 05 88 55 26 72
83 54 90 1d 6d e6 80 a4 c0 64 22 80 00 00 00 00
00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
e7 82 65 05 88 55 26 72 83 54 90 1d 6d e6 80 a4
c0 64 22 80 00 00 00 00 c0 19 90 dd 00 00 00 00
07 00 00 00 98 00 00 00 c8 01 00 00 40 01 00 00
00 00 00 00 00 00 00 00 00 00 0a 00 00 00 00 00
00 00 00 00 00 00 00 00 00 00 10 00 00 00 00 00
00 00 f0 00 00 00 00 00 00 00 00 00 00 00 00 00
00 00 00 01 00 00 00 00 00 00 90 dc 00 00 00 00
00 00 00 00 00 00 00 00 00 00 a0 dd 00 00 00 00
00 00 20 00 00 00 00 00 02 00 00 00 00 00 00 00
00 00 00 f4 00 00 00 00 00 00 00 04 00 00 00 00
03 00 00 00 00 00 00 00 00 00 00 00 01 00 00 00
00 00 00 10 00 00 00 00 00 00 00 00 00 00 00 00
00 00 00 00 01 00 00 00 00 00 00 10 00 00 00 00
00 00 00 00

Due to SinitMleData.PolicyControl = 0x00000000 for calculation
SinitMleData.LcpPolicyHash has to be zero'ed, right?

OsSinitData.Capabilities is 0x2 (uint32 little endian)

Here is the expected value as reported by tboot. The step from
"before extending" to "after extending" is clear to me. But I can't
recalculate the value "before extending".

TBOOT:   VL measurements:
TBOOT:     PCR 17: e4 d6 78 d8 71 60 c7 38 ab c6 2e f8 92 2c 1e ee 12 fb 50 4c
TBOOT: PCRs before extending:
TBOOT:   PCR 17: e0 8f f9 be 75 75 31 63 af 1a eb 4d c3 5f ca 6e db 6b 89 98
TBOOT: PCRs after extending:
TBOOT:   PCR 17: 3b 0c 5f fe e8 c7 7e 13 93 68 6a 53 9d d8 53 10 83 4b d2 c7

greetz, Michael

Jonathan M. McCune wrote:
> Hi Michael, list,
> 
> Attached is a script that I threw together to recreate the contents of 
> the PCR values on a system I've been using, by looking at some of the 
> debug values.  I hope that you find it useful.
> 
> -Jon
> 
> 
> Michael Gissing wrote:
>> Hi!
>>
>> Now I'm trying to calculate PCR 17 by hand. I'm making only little 
>> progress on that issue. Here's what I'm doing, there are some 
>> Questions in there, what I haven't understood. The informations below 
>> are based on "Measured Launched Environment Developer's Guide - June 
>> 2008".

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