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List:       trousers-tech
Subject:    [TrouSerS-tech] Transport failures with ATML but not IFX
From:       Wyllys Ingersoll <wyllys.ingersoll () sun ! com>
Date:       2009-03-02 20:26:10
Message-ID: 49AC40E2.60501 () sun ! com
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When running the tpm testsuite on 2 different systems (both of which
were activated the same way with the same owner password), many
of the "transport" tests fail on the ATML TPM but succeed on
Infineon.  Both TPMs are 1.2.

I'm wondering if there are additional prerequisites for the ATML TPMs
to be able to use transport contexts.  It apparently is looking
for some additional authentication that is not present or doesn't
match up.  I'm just puzzled because the same test pass cleanly on
Infineon chips.

As an example, the context/Tspi_Context_CloseSignTransport01 and 
context/Tspi_Context_CloseSignTransport04 tests both fail as follows:

Tspi_Context_CloseSignTransport01.c 0 FAIL : Tspi_Key_LoadKey returned (12605) TSS_E_TSP_TRANS_AUTHFAIL
Tspi_Context_CloseSignTransport04.c 0 FAIL : Tspi_Key_LoadKey returned (12605) TSS_E_TSP_TRANS_AUTHFAIL

Additionally - almost everything in the "transport" subdir fails with TPM_E_AUTHFAIL on with the
Atmel TPM but passes with the Infineon.

Anyone have any ideas why or what can be done to correct this?  The test code appears to
be written correctly and the fact that the same code succeeds on a different TPM
suggests a bug in the TPM firmware but it's very hard to pinpoint the cause.

Overall, IMO, the tpm test suite is extremely unreliable and needs quite a bit of work
to get it to a reasonably stable state where it can be used on a variety of device from
different manufacturers.  Does anyone actually use it or maintain it or is it just
another sourceforge orphan?

Thanks,
  Wyllys Ingersoll




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