[tpm2] tpm2_nvwrite hanging on 3.X

[Duncan.Palmer at data61.csiro.au]

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Hi,

I've come back to something I stopped work on early last November. I was working with the tpm2_tools master branch at the time, and have moved to 3.X to get support for PCR based authorisation with tpm2_nvread/write. With 3.X, tpm2_nvwrite is hanging when trying to write to the tpm device file. Using the code from last year (sorry, I no longer have a record of what revision this was), it was working fine (see log snippet below).

I'm using the 1.x branch of tpm2-tss, and I configure tpm2-tools with '--with-tcti-device --without-tcti-socket'. I've also had to modify Makefile.am to get this combination to build;


--LIBMARSHAL_CFLAGS = \
--    -DALG_ECMQV=1
++#LIBMARSHAL_CFLAGS = \
++#    -DALG_ECMQV=1


Can anyone comment on this? Should I raise a bug on your tracker?


Regards,
Duncan


tpm2_nvwrite logs from my testing last year;

root(a)tpm:/home/foo/install/bin# ./tpm2_nvdefine -x 0x1500016 -a 0x40000001 -s 32 -t 0x2000A
root(a)tpm:/home/foo/install/bin# ./tpm2_nvlist
1 NV indexes defined.

  0. NV Index: 0x1500016
  {
    Hash algorithm(nameAlg):11
     attributes: ownerwrite|policywrite|ownerread(0xA000200)
     The size of the data area(dataSize):32
     Authorization Policy for R/W/D:
  }

root(a)tpm:/home/foo/install/bin# echo 'foo' > nv.dat
root(a)tpm:/home/foo/install/bin# ./tpm2_nvwrite -x 0x1500016 -a 0x40000001 nv.dat
66 6f 6f 0a

root(a)tpm:/home/foo/install/bin# ./tpm2_nvread -x 0x1500016 -a 0x40000001
000000: 66 6f 6f 0a 00 00 00 00 00 00 00 00 00 00 00 00  foo.............
000010: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00  ................




 Duncan Palmer
 Senior Software Engineer | Autonomous Systems
 Data61 | CSIRO